mirror of
https://github.com/AsahiLinux/m1n1
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212 lines
6.2 KiB
Python
212 lines
6.2 KiB
Python
# SPDX-License-Identifier: MIT
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"""
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Things to note:
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The command buffer is encrypted after the poweron sequence, and I
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can't find the key in the SEP using sven's old SEP tracer.
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"""
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import struct
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from construct import *
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from m1n1.hv import TraceMode
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from m1n1.proxyutils import RegMonitor
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from m1n1.utils import *
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from m1n1.trace import ADTDevTracer
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from m1n1.trace.asc import ASCTracer, ASCRegs, EP, EPState, msg, msg_log, DIR
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from m1n1.trace.dart import DARTTracer
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from m1n1.trace.gpio import GPIOTracer
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from m1n1.trace.spi import SPITracer
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DARTTracer = DARTTracer._reloadcls()
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ASCTracer = ASCTracer._reloadcls()
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GPIOTracer = GPIOTracer._reloadcls()
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SPITracer = SPITracer._reloadcls()
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mesa_node = None
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for node in hv.adt.walk_tree():
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try:
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if node.compatible[0] == "spi-1,spimc":
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for c in node:
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try:
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if c.compatible[0] == "biosensor,mesa":
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mesa_node = c
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break
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except AttributeError:
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continue
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except AttributeError:
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continue
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if mesa_node is not None:
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break
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# trace interrupts
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aic_phandle = getattr(hv.adt["/arm-io/aic"], "AAPL,phandle")
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spi_node = mesa_node._parent
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if getattr(spi_node, "interrupt-parent") == aic_phandle:
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for irq in getattr(spi_node, "interrupts"):
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hv.trace_irq("/arm-io/" + spi_node.name, irq, 1, hv.IRQTRACE_IRQ)
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if getattr(mesa_node, "interrupt-parent") == aic_phandle:
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for irq in getattr(mesa_node, "interrupts"):
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hv.trace_irq("/arm-io/" + mesa_node.name, irq, 1, hv.IRQTRACE_IRQ)
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mesa_pins = {
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0xc4: "mesa_pwr",
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}
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gpio_tracer = GPIOTracer(hv, "/arm-io/gpio0", mesa_pins, verbose=1)
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gpio_tracer.start()
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dart_sio_tracer = DARTTracer(hv, "/arm-io/dart-sio", verbose=1)
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dart_sio_tracer.start()
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iomon = RegMonitor(hv.u, ascii=True)
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def readmem_iova(addr, size, readfn=None):
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try:
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return dart_sio_tracer.dart.ioread(0, addr, size)
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except Exception as e:
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print(e)
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return None
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iomon.readmem = readmem_iova
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class SIOMessage(Register64):
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EP = 7, 0 # SPI2 DMA channels 0x18, 0x19
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TAG = 13, 8 # counts up, message ID?
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TYPE = 23, 16 # SIO message type
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PARAM = 31, 24
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DATA = 63, 32
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class SIOStart(SIOMessage):
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TYPE = 23, 16, Constant(2)
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class SIOSetup(SIOMessage):
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TYPE = 23, 16, Constant(3)
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class SIOConfig(SIOMessage): #???
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TYPE = 23, 16, Constant(5)
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class SIOAck(SIOMessage):
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TYPE = 23, 16, Constant(0x65)
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class SIOSetupIO(SIOMessage):
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TYPE = 23, 16, Constant(6)
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class SIOCompleteIO(SIOMessage):
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TYPE = 23, 16, Constant(0x68)
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class SIOEp(EP):
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BASE_MESSAGE = SIOMessage
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SHORT = "sioep"
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def __init__(self, tracer, epid):
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super().__init__(tracer, epid)
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self.state.iova = None
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self.state.iova_cfg = None
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self.state.iova_unk = None
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self.state.dumpfile = None
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@msg(2, DIR.TX, SIOStart)
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def Start(self, msg):
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self.log("Start SIO")
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@msg(3, DIR.TX, SIOSetup)
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def m_Setup(self, msg):
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if msg.EP == 0 and msg.PARAM == 0x1:
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self.state.iova = msg.DATA << 12
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elif msg.EP == 0 and msg.PARAM == 0x2:
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# size for PARAM == 0x1?
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iomon.add(self.state.iova, msg.DATA * 8,
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name=f"SIO IOVA region at 0x{self.state.iova:08x}",
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offset=self.state.iova)
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#elif msg.EP == 0 and msg.PARAM == 0xb:
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## second iova block, maybe config
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#self.state.iova_cfg = msg.DATA << 12
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#elif msg.EP == 0 and msg.PARAM == 0xc:
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## size for PARAM == 0xb?
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#iomon.add(self.state.iova_cfg, msg.DATA * 8,
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#name=f"SIO IOVA CFG region at 0x{self.state.iova_cfg:08x}",
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#offset=self.state.iova_cfg)
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if msg.EP == 0 and msg.PARAM == 0xd:
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# possible fingerprint sensor IOVA region
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self.state.iova_unk = msg.DATA << 12
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elif msg.EP == 0 and msg.PARAM == 0xe:
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iomon.add(self.state.iova_unk, msg.DATA * 8,
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name=f"SIO IOVA UNK region at {self.state.iova_unk:08x}",
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offset=self.state.iova_unk)
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@msg(5, DIR.TX, SIOConfig)
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def m_Config(self, msg):
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return
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@msg(0x65, DIR.RX, SIOAck)
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def m_Ack(self, msg):
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return
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@msg(6, DIR.TX, SIOSetupIO)
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def m_SetupIO(self, msg):
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if msg.EP == 0x18 or 0x19:
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iomon.poll()
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return
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@msg(0x68, DIR.RX, SIOCompleteIO)
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def m_CompleteIO(self, msg):
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if msg.EP == 0x18:
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if self.state.iova is None:
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return
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buf = struct.unpack("<I", self.tracer.ioread(self.state.iova + 0xa8, 4))[0]
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size = struct.unpack("<I", self.tracer.ioread(self.state.iova + 0xb0, 4))[0]
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self.log(f"SetupIO 0x18: buf {buf:#x}, size {size:#x}")
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# XXX: Do not try to log messages going to 0x2
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if buf == 0x2:
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self.log("Mesa command interrupted!")
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return
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self.log_mesa("EP 0x18", self.tracer.ioread(buf, size))
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return
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if msg.EP == 0x19:
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if self.state.iova is None:
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return
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buf = struct.unpack("<I", self.tracer.ioread(self.state.iova + 0x48, 4))[0]
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size = struct.unpack("<I", self.tracer.ioread(self.state.iova + 0x50, 4))[0]
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self.log(f"CompleteIO 0x19: buf {buf:#x}, size {size:#x}")
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# XXX: Do not try to log messages going to 0x2
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if buf == 0x2:
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self.log("Mesa command interrupted!")
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return
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if size >= 0x7200:
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with open("large_message.bin", "wb") as fd:
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fd.write(self.tracer.ioread(buf, size))
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print("Fingerprint record message dumped.")
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return
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self.log_mesa("EP 0x19", self.tracer.ioread(buf, size))
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return
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def log_mesa(self, label, data):
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self.log(f"{label}: {len(data):d} byte message: ")
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chexdump(data)
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print("\n")
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class SIOTracer(ASCTracer):
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ENDPOINTS = {
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0x20: SIOEp
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}
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sio_tracer = SIOTracer(hv, "/arm-io/sio", verbose=1)
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sio_tracer.start(dart=dart_sio_tracer.dart)
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spi_tracer = SPITracer(hv, "/arm-io/spi2", verbose=2)
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spi_tracer.start()
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