--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/linux-patch/minpatch-4.4.14/0001-USB-serial-ftdi_sio-add-support-for-FreeCalypso-JTAG.patch	Sun Dec 06 02:55:40 2020 +0000
@@ -0,0 +1,78 @@
+From 5af8e2ad7d0295d90cb2bc566f3d935668fb0535 Mon Sep 17 00:00:00 2001
+From: "Mychaela N. Falconia" <falcon@freecalypso.org>
+Date: Wed, 16 Sep 2020 01:56:29 +0000
+Subject: [PATCH 1/3] USB: serial: ftdi_sio: add support for FreeCalypso
+ JTAG+UART adapters
+
+commit 6cf87e5edd9944e1d3b6efd966ea401effc304ee upstream.
+
+There exist many FT2232-based JTAG+UART adapter designs in which
+FT2232 Channel A is used for JTAG and Channel B is used for UART.
+The best way to handle them in Linux is to have the ftdi_sio driver
+create a ttyUSB device only for Channel B and not for Channel A:
+a ttyUSB device for Channel A would be bogus and will disappear as
+soon as the user runs OpenOCD or other applications that access
+Channel A for JTAG from userspace, causing undesirable noise for
+users.  The ftdi_sio driver already has a dedicated quirk for such
+JTAG+UART FT2232 adapters, and it requires assigning custom USB IDs
+to such adapters and adding these IDs to the driver with the
+ftdi_jtag_quirk applied.
+
+Boutique hardware manufacturer Falconia Partners LLC has created a
+couple of JTAG+UART adapter designs (one buffered, one unbuffered)
+as part of FreeCalypso project, and this hardware is specifically made
+to be used with Linux hosts, with the intent that Channel A will be
+accessed only from userspace via appropriate applications, and that
+Channel B will be supported by the ftdi_sio kernel driver, presenting
+a standard ttyUSB device to userspace.  Toward this end the hardware
+manufacturer will be programming FT2232 EEPROMs with custom USB IDs,
+specifically with the intent that these IDs will be recognized by
+the ftdi_sio driver with the ftdi_jtag_quirk applied.
+
+Signed-off-by: Mychaela N. Falconia <falcon@freecalypso.org>
+[johan: insert in PID order and drop unused define]
+Cc: stable@vger.kernel.org
+Signed-off-by: Johan Hovold <johan@kernel.org>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ drivers/usb/serial/ftdi_sio.c     | 5 +++++
+ drivers/usb/serial/ftdi_sio_ids.h | 7 +++++++
+ 2 files changed, 12 insertions(+)
+
+diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c
+index b61f12160d37..984a93c38365 100644
+--- a/drivers/usb/serial/ftdi_sio.c
++++ b/drivers/usb/serial/ftdi_sio.c
+@@ -1008,6 +1008,11 @@ static const struct usb_device_id id_table_combined[] = {
+ 	{ USB_DEVICE(ICPDAS_VID, ICPDAS_I7560U_PID) },
+ 	{ USB_DEVICE(ICPDAS_VID, ICPDAS_I7561U_PID) },
+ 	{ USB_DEVICE(ICPDAS_VID, ICPDAS_I7563U_PID) },
++	/* FreeCalypso USB adapters */
++	{ USB_DEVICE(FTDI_VID, FTDI_FALCONIA_JTAG_BUF_PID),
++		.driver_info = (kernel_ulong_t)&ftdi_jtag_quirk },
++	{ USB_DEVICE(FTDI_VID, FTDI_FALCONIA_JTAG_UNBUF_PID),
++		.driver_info = (kernel_ulong_t)&ftdi_jtag_quirk },
+ 	{ }					/* Terminating entry */
+ };
+ 
+diff --git a/drivers/usb/serial/ftdi_sio_ids.h b/drivers/usb/serial/ftdi_sio_ids.h
+index c5d6c1e73e8e..6218f9c45016 100644
+--- a/drivers/usb/serial/ftdi_sio_ids.h
++++ b/drivers/usb/serial/ftdi_sio_ids.h
+@@ -38,6 +38,13 @@
+ 
+ #define FTDI_LUMEL_PD12_PID	0x6002
+ 
++/*
++ * Custom USB adapters made by Falconia Partners LLC
++ * for FreeCalypso project, ID codes allocated to Falconia by FTDI.
++ */
++#define FTDI_FALCONIA_JTAG_BUF_PID	0x7150
++#define FTDI_FALCONIA_JTAG_UNBUF_PID	0x7151
++
+ /* Cyber Cortex AV by Fabulous Silicon (http://fabuloussilicon.com) */
+ #define CYBER_CORTEX_AV_PID	0x8698
+ 
+-- 
+2.9.0
+