CGBC_CMD_DATA
iowrite8(_cmd[i], cgbc->io_cmd + CGBC_CMD_DATA + (i % 4));
iowrite8(checksum, cgbc->io_cmd + CGBC_CMD_DATA + (i % 4));
istatus = ioread8(cgbc->io_cmd + CGBC_CMD_DATA);
_data[i] = ioread8(cgbc->io_cmd + CGBC_CMD_DATA + ((i + 1) % 4));
data_checksum = ioread8(cgbc->io_cmd + CGBC_CMD_DATA + ((i + 1) % 4));
data_checksum = ioread8(cgbc->io_cmd + CGBC_CMD_DATA + 1);
data_checksum = ioread8(cgbc->io_cmd + CGBC_CMD_DATA + 1);