mirror of
https://github.com/AsahiLinux/m1n1
synced 2024-12-24 20:33:10 +00:00
152 lines
4.5 KiB
Python
152 lines
4.5 KiB
Python
# SPDX-License-Identifier: MIT
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import struct
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from construct import *
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from m1n1.utils import *
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from m1n1.proxyutils import *
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from m1n1.constructutils import *
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from m1n1.trace.asc import ASCTracer, EP, EPState, msg, msg_log, DIR
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from m1n1.trace.dockchannel import DockChannelTracer
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from m1n1.trace.dart import DARTTracer
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from m1n1.fw.mtp import *
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class MTPTracer(ASCTracer):
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def handle_msg(self, direction, r0, r1):
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super().handle_msg(direction, r0, r1)
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mtp_tracer = MTPTracer(hv, "/arm-io/mtp", verbose=1)
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mtp_tracer.start()
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dart_tracer = DARTTracer(hv, "/arm-io/dart-mtp", verbose=1)
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dart_tracer.start()
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trace_device("/arm-io/dart-mtp", True)
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DockChannelTracer = DockChannelTracer._reloadcls()
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mon = RegMonitor(hv.u, ascii=True, bufsize=0x400000)
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class StreamState:
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def __init__(self):
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self.buf = bytes()
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class MTPStream:
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def __init__(self, tracer, name, state):
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self.tracer = tracer
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self.name = name
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self.state = state
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def put(self, d):
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buf = self.state.buf + d
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while buf:
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if len(buf) < 8:
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self.state.buf = buf
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return
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hlen, mtype, size, ctr, devid, pad = struct.unpack("<BBHBBH", buf[:8])
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assert pad == 0
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if hlen != 8:
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self.tracer.log(f"Bad hlen 0x{hlen:2x}, skipping a byte...")
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self.state.buf = buf[1:]
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return
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need = 8 + size + 4
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if len(buf) < need:
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self.state.buf = buf
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return
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payload = buf[8:8 + size]
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self.packet(mtype, devid, ctr, payload)
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buf = buf[need:]
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self.state.buf = buf
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def packet(self, mtype, devid, ctr, pkt):
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self.tracer.packet(mtype, devid, ctr, pkt, dir=self.name)
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def log(self, msg):
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self.tracer.log(f"{self.name} " + msg)
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class MTPChannelTracer(DockChannelTracer):
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def init_state(self):
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self.state.rx = StreamState()
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self.state.tx = StreamState()
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self.state.rx_mem = StreamState()
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self.state.buf = None
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self.state.buf_size = None
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self.state.rptr = 0
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def start(self, dart=None):
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super().start()
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self.dart = dart
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self.rx_stream = MTPStream(self, "<", self.state.rx)
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self.tx_stream = MTPStream(self, ">", self.state.tx)
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self.rx_mem_stream = MTPStream(self, "<", self.state.rx_mem)
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self.init_mon()
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def tx(self, d):
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self.tx_stream.put(d)
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def rx(self, d):
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self.rx_stream.put(d)
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def init_mon(self):
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pass
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#if self.state.buf is not None:
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#addr, size = self.dart.iotranslate(1, self.state.buf, self.state.buf_size)[0]
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#size = align_up(size, 4)
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#mon.add(addr, size)
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def poll_ring(self):
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wptr = struct.unpack("<I", self.dart.ioread(1, self.state.buf, 4))[0]
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rptr = self.state.rptr
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if wptr < rptr:
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size = self.state.buf_size - 8 - rptr
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d = self.dart.ioread(1, self.state.buf + 8 + rptr, size)
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self.rx_mem_stream.put(d)
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self.state.rptr = rptr = 0
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size = wptr - rptr
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d = self.dart.ioread(1, self.state.buf + 8 + rptr, size)
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self.rx_mem_stream.put(d)
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self.state.rptr = rptr + size
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def packet(self, mcode, devid, ctr, data, dir):
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#mon.poll()
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chexdump(data, print_fn=self.log)
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if data == b"":
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self.poll_ring()
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msg = "<null>"
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elif dir == ">":
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msg = TXMessage.parse(data)
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elif dir == "<":
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msg = RXMessage.parse(data)
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if devid == 0:
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if (msg.hdr.flags & 0xc0) == 0x00:
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msg.msg = NotificationMsg.parse(msg.msg)
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elif (msg.hdr.flags & 0xc0) == 0x80:
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msg.msg = DeviceControlAck.parse(msg.msg)
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else:
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assert False
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try:
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mtype = msg.msg.name
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except:
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mtype = None
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if mtype == "InitAFEMsg":
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afe = self.dart.ioread(1, msg.msg.buf_addr, msg.msg.buf_size)
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chexdump(afe, print_fn=self.log)
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open("afe.bin", "wb").write(afe)
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elif mtype == "InitBufMsg":
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self.state.buf = msg.msg.buf_addr
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self.state.buf_size = msg.msg.buf_size
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self.init_mon()
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self.log(f"{dir} Type {mcode:02x} Dev {devid} #{ctr} {msg!s}")
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hid_tracer = MTPChannelTracer(hv, "/arm-io/dockchannel-mtp", verbose=3)
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hid_tracer.start(dart_tracer.dart)
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