From eadeb98559ee1f4b896e016c598478fb0aebebcd Mon Sep 17 00:00:00 2001
From: s-ol <s+removethis@s-ol.nu>
Date: Sun, 18 Feb 2024 20:17:25 +0100
Subject: clean up and add README

---
 ch340.lua | 104 --------------------------------------------------------------
 1 file changed, 104 deletions(-)
 delete mode 100755 ch340.lua

(limited to 'ch340.lua')

diff --git a/ch340.lua b/ch340.lua
deleted file mode 100755
index 14c92bb..0000000
--- a/ch340.lua
+++ /dev/null
@@ -1,104 +0,0 @@
-local control = Proto("ch340.ctl", "CH340 Serial Control")
-local bulk = Proto("ch340.bulk", "CH340 Serial Data")
-
-local ep_dir_f = Field.new("usb.endpoint_address.direction")
-
-local REQ_TBL = {
-  [0x5F] = "CH341_REQ_READ_VERSION",
-  [0x9A] = "CH341_REQ_WRITE_REG",
-  [0x95] = "CH341_REQ_READ_REG",
-  [0xA1] = "CH341_REQ_SERIAL_INIT",
-  [0xA4] = "CH341_REQ_MODEM_CTRL",
-}
-
-local REG_TBL = {
-  [0x07] = "STATUS2",
-  [0x06] = "STATUS",
-  [0x13] = "DIVISOR",
-  [0x12] = "PRESCALER",
-  [0x18] = "LCR",
-  [0x25] = "LCR2",
-}
-
-control.fields.req = ProtoField.uint8("ch340.ctl.req", "Request", base.HEX, REQ_TBL)
-control.fields.reg1 = ProtoField.uint8("ch340.ctl.reg1", "Register 1", base.HEX, REG_TBL)
-control.fields.reg2 = ProtoField.uint8("ch340.ctl.reg2", "Register 2", base.HEX, REG_TBL)
-control.fields.val1 = ProtoField.uint8("ch340.ctl.val1", "Value 1", base.HEX)
-control.fields.val2 = ProtoField.uint8("ch340.ctl.val2", "Value 2", base.HEX)
-control.fields.modem = ProtoField.uint8("ch340.ctl.modem", "Modem", base.HEX)
-
-bulk.fields.data_in = ProtoField.bytes("ch340.bulk.data_in", "Data In")
-bulk.fields.data_out = ProtoField.bytes("ch340.bulk.data_out", "Data Out")
-
-local serial_tbl = DissectorTable.heuristic_new("ch340.serial_data", bulk)
-
-function control.dissector(buffer, pinfo, tree)
-  if buffer:captured_len() < 1 then return end
-
-  local sub = tree:add(control, buffer())
-
-  local req = buffer(0, 1)
-  sub:add(control.fields.req, req)
-
-  req = REQ_TBL[req:uint()] or ""
-  pinfo.cols.info:set("CH340 " .. req:sub(11))
-  if req == "CH341_REQ_WRITE_REG" or
-     req == "CH341_REQ_READ_REG" then
-
-    local reg2 = buffer(1, 1)
-    local reg1 = buffer(2, 1)
-    sub:add(control.fields.reg1, reg1)
-    sub:add(control.fields.reg2, reg2)
-
-    reg1 = reg1:uint()
-    reg2 = reg2:uint()
-
-    pinfo.cols.info:append(string.format(" %s/%s", (REG_TBL[reg1] or reg1), (REG_TBL[reg2] or reg2)))
-
-    if req == "CH341_REQ_WRITE_REG" then
-      local val2 = buffer(3, 1)
-      local val1 = buffer(4, 1)
-      sub:add(control.fields.val1, val1)
-      sub:add(control.fields.val2, val2)
-    end
-  elseif name == "CH341_REQ_MODEM_CTRL" then
-    sub:add(control.fields.modem, buffer(1))
-  end
-end
-
-function bulk.dissector(buffer, pinfo, tree)
-  if buffer:captured_len() < 1 then return end
-
-  local sub = tree:add(bulk, buffer())
-  pinfo.cols.info:set("CH340 Serial")
-
-  local ep_dir = ep_dir_f()() -- 0: h2d, 1: d2h
-  if ep_dir == 0 then
-    pinfo.cols.info:append(" out")
-    pinfo.p2p_dir = P2P_DIR_SENT
-    sub:add(bulk.fields.data_out, buffer())
-  else
-    pinfo.cols.info:append(" in")
-    pinfo.p2p_dir = P2P_DIR_RECV
-    sub:add(bulk.fields.data_in, buffer())
-  end
-
-  DissectorTable.try_heuristics("ch340.serial_data", buffer, pinfo, tree)
-end
-
-function usb_protocol_key(class, subclass, protocol)
-  return bit.bor(
-    bit.lshift(1, 31),
-    bit.lshift(bit.band(class, 0xff), 16),
-    bit.lshift(bit.band(subclass, 0xff), 8),
-    bit.band(protocol, 0xff)
-  )
-end
-
-local ctl_table = DissectorTable.get("usb.control")
-ctl_table:add(usb_protocol_key(0xff, 0x01, 0x02), control)
-ctl_table:add(0xffff, control)
-
-local bulk_table = DissectorTable.get("usb.bulk")
-bulk_table:add(usb_protocol_key(0xff, 0x01, 0x02), bulk)
-bulk_table:add(0xffff, bulk)
-- 
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