mirror of
https://github.com/AsahiLinux/m1n1
synced 2024-09-20 05:01:53 +00:00
87 lines
2.6 KiB
Python
Executable file
87 lines
2.6 KiB
Python
Executable file
#!/usr/bin/env python3
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# SPDX-License-Identifier: MIT
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import sys, pathlib
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import time
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sys.path.append(str(pathlib.Path(__file__).resolve().parents[1]))
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import argparse
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from m1n1.hw.dart import DART
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from m1n1.hw.admac import *
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argparser = argparse.ArgumentParser()
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argparser.add_argument("-b", "--bufsize", type=int, default=1024*32,
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help="size of one DMA buffer (covered by one descriptor)")
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argparser.add_argument("-n", "--node", type=str, default="admac-sio",
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help="name of ADT node")
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argparser.add_argument("-c", "--chan", "--channel", type=int, default=0,
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help="channel no")
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argparser.add_argument("-w", "--buswidth", type=E_BUSWIDTH, default=E_BUSWIDTH.W_32BIT,
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help="DMA device-facing bus width")
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argparser.add_argument("-v", "--verbose", action='store_true')
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args = argparser.parse_args()
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from m1n1.setup import p, u
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# find full ADT path
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path = None
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for node in u.adt["/arm-io"]:
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if node.name == args.node:
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path = node._path.removeprefix("/device-tree")
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print(f"Found {path}", file=sys.stderr)
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if "clock-gates" in node._properties:
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print(f"Enabling {path}", file=sys.stderr)
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p.pmgr_adt_clocks_enable(path)
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break
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if path is None:
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print(f"No instance named {args.node:r} found!", file=sys.stderr)
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sys.exit(1)
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admac_node = u.adt[path]
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iommu_mappers = dict()
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for node in u.adt["/arm-io"].walk_tree():
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if "compatible" in node._properties and node.compatible == ["iommu-mapper"]:
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iommu_mappers[getattr(node, "AAPL,phandle")] = node
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mapper = iommu_mappers[admac_node.iommu_parent]
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dart_path = mapper._parent_path.removeprefix("/device-tree")[:-1]
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dart_idx = mapper.reg
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if "clock-gates" in u.adt[dart_path]._properties:
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print(f"Enabling {dart_path}", file=sys.stderr)
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p.pmgr_adt_clocks_enable(path)
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dart = DART.from_adt(u, dart_path)
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admac = ADMAC(u, admac_node.get_reg(0)[0], dart,
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dart_stream=dart_idx, debug=args.verbose)
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chan = admac.chans[args.chan]
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chan.disable()
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chan.reset()
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chan.read_reports()
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chan.buswidth = args.buswidth
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chan.framesize = E_FRAME.F_1_WORD
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chan.sram_carveout = (0x0, 0x1000)
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if chan.tx:
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chan.submit(bytearray(args.bufsize))
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else:
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chan.submit(buflen=args.bufsize)
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chan.enable()
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try:
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if chan.tx:
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while (buf := sys.stdin.buffer.read(args.bufsize)):
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while not chan.can_submit():
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chan.poll()
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chan.submit(buf)
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else:
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while True:
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while chan.can_submit():
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chan.submit(buflen=args.bufsize)
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sys.stdout.buffer.write(chan.poll())
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except KeyboardInterrupt:
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pass
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chan.disable()
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