/// <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);
}
var 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);
internal static int SendMultipleMmcCommands(int fd, Device.MmcSingleCommand[] commands, out double duration,
out bool sense, uint timeout = 0)
{
duration = 0;
sense = false;
int off = 0;
// Create array for buffers
IntPtr[] bufferPointers = new IntPtr[commands.Length];
// Allocate memory for the array for commands
byte[] ioMultiCmd = new byte[sizeof(ulong) + (Marshal.SizeOf <MmcIocCmd>() * commands.Length)];
// First value of array is uint64 with count of commands
Array.Copy(BitConverter.GetBytes((ulong)commands.Length), 0, ioMultiCmd, 0, sizeof(ulong));
off = sizeof(ulong);
for (int i = 0; i < commands.Length; i++)
{
// Create command
var ioCmd = new MmcIocCmd();
// Allocate buffer
bufferPointers[i] = Marshal.AllocHGlobal(commands[i].buffer.Length);
// Define command
ioCmd.write_flag = commands[i].write;
ioCmd.is_ascmd = commands[i].isApplication;
ioCmd.opcode = (uint)commands[i].command;
ioCmd.arg = commands[i].argument;
ioCmd.flags = commands[i].flags;
ioCmd.blksz = commands[i].blockSize;
ioCmd.blocks = commands[i].blocks;
if (timeout > 0)
{
ioCmd.data_timeout_ns = timeout * 1000000000;
ioCmd.cmd_timeout_ms = timeout * 1000;
}
ioCmd.data_ptr = (ulong)bufferPointers[i];
// Copy buffer to unmanaged space
Marshal.Copy(commands[i].buffer, 0, bufferPointers[i], commands[i].buffer.Length);
// Copy command to array
byte[] ioCmdBytes = Helpers.Marshal.StructureToByteArrayLittleEndian(ioCmd);
Array.Copy(ioCmdBytes, 0, ioMultiCmd, off, Marshal.SizeOf <MmcIocCmd>());
// Advance pointer
off += Marshal.SizeOf <MmcIocCmd>();
}
// Allocate unmanaged memory for array of commands
IntPtr ioMultiCmdPtr = Marshal.AllocHGlobal(ioMultiCmd.Length);
// Copy array of commands to unmanaged memory
Marshal.Copy(ioMultiCmd, 0, ioMultiCmdPtr, ioMultiCmd.Length);
// Send command
DateTime start = DateTime.UtcNow;
int error = Extern.ioctlMmcMulti(fd, LinuxIoctl.MmcIocMultiCmd, ioMultiCmdPtr);
DateTime end = DateTime.UtcNow;
sense |= error < 0;
if (error < 0)
{
error = Marshal.GetLastWin32Error();
}
duration = (end - start).TotalMilliseconds;
off = sizeof(ulong);
// Copy array from unmanaged memory
Marshal.Copy(ioMultiCmdPtr, ioMultiCmd, 0, ioMultiCmd.Length);
// TODO: Use real pointers this is too slow
for (int i = 0; i < commands.Length; i++)
{
byte[] tmp = new byte[Marshal.SizeOf <MmcIocCmd>()];
// Copy command to managed space
Array.Copy(ioMultiCmd, off, tmp, 0, tmp.Length);
MmcIocCmd command = Helpers.Marshal.ByteArrayToStructureLittleEndian <MmcIocCmd>(tmp);
// Copy response
commands[i].response = command.response;
// Copy buffer to managed space
Marshal.Copy(bufferPointers[i], commands[i].buffer, 0, commands[i].buffer.Length);
// Free buffer
Marshal.FreeHGlobal(bufferPointers[i]);
// Advance pointer
off += Marshal.SizeOf <MmcIocCmd>();
}
// Free unmanaged memory
Marshal.FreeHGlobal(ioMultiCmdPtr);
return(error);
}