[   52.948072] surface_sam_ssh serial0-0: probing
[   52.948409] ttyS0 - failed to request DMA
[   52.948490] surface_sam_ssh serial0-0: sending message
[   52.948492] send: 00000000: aa 55 80 08 00 00 59 f0 80 01 01 00 00 00 00 16
[   52.948493] send: 00000010: 89 43
[   52.949977] surface_sam_ssh serial0-0: recv: received buffer (size: 10)
[   52.949981] recv: 00000000: aa 55 40 00 00 00 5c ea ff ff
[   52.949985] surface_sam_ssh serial0-0: recv: valid control message received (type: 0x40)
[   52.950314] surface_sam_ssh serial0-0: recv: received buffer (size: 19)
[   52.950318] recv: 00000000: aa 55 80 09 00 30 3a f1 80 01 00 01 00 00 00 16
[   52.950320] recv: 00000010: 00 66 0c
[   52.950324] surface_sam_ssh serial0-0: recv: valid command message received
[   52.950346] surface_sam_ssh serial0-0: sending message
[   52.950351] send: 00000000: aa 55 40 00 00 30 0f dc ff ff