--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/linux-patch/README	Thu Jul 30 05:12:44 2020 +0000
@@ -0,0 +1,14 @@
+The patches contained in this directory need to be applied to the Linux kernel
+ftdi_sio driver, specifically to ftdi_sio.c and ftdi_sio_ids.h source files.
+This patch adds support for Falconia/FreeCalypso custom USB IDs with
+appropriate quirks applied:
+
+* FreeCalypso buffered and unbuffered JTAG+UART adapters are recognized and
+  treated as such, creating a ttyUSBx device for Channel B, but not for
+  Channel A.
+
+* DUART28C USB ID is treated with the appropriate quirk, suppressing automatic
+  DTR & RTS assertion on ttyUSBx open for Channel B.
+
+The present patches have been made against Linux kernel version 4.4.14;
+application to other kernel versions may require minor porting.