@@ -1799,20 +1799,24 @@ static int ftdi_8u2232c_probe(struct usb_serial *serial)
}
/*
- * First and second port on STMCLiteadaptors is reserved for JTAG interface
- * and the forth port for pio
+ * First two ports on JTAG adaptors using an FT4232 such as STMicroelectronics's
+ * ST Micro Connect Lite are reserved for JTAG or other non-UART interfaces and
+ * can be accessed from userspace.
+ * The next two ports are enabled as UARTs by default, where port 2 is
+ * a conventional RS-232 UART.
*/
static int ftdi_stmclite_probe(struct usb_serial *serial)
{
struct usb_device *udev = serial->dev;
struct usb_interface *interface = serial->interface;
- if (interface == udev->actconfig->interface[2])
- return 0;
-
- dev_info(&udev->dev, "Ignoring serial port reserved for JTAG\n");
+ if (interface == udev->actconfig->interface[0] ||
+ interface == udev->actconfig->interface[1]) {
+ dev_info(&udev->dev, "Ignoring serial port reserved for JTAG\n");
+ return -ENODEV;
+ }
- return -ENODEV;
+ return 0;
}
/*
This is a note to let you know that I have just added a patch titled USB: ftdi_sio: enable two UART ports on ST Microconnect Lite to the linux-3.5.y-queue branch of the 3.5.y.z extended stable tree which can be found at: http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.5.y-queue If you, or anyone else, feels it should not be added to this tree, please reply to this email. For more information about the 3.5.y.z tree, see https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable Thanks. -Luis ------ From e3ad2fbbcd53cfff16303b7c402757600f61be94 Mon Sep 17 00:00:00 2001 From: Adrian Thomasset <adrian.thomasset@st.com> Date: Wed, 24 Apr 2013 11:37:35 +0100 Subject: [PATCH] USB: ftdi_sio: enable two UART ports on ST Microconnect Lite commit 71d9a2b95fc9c9474d46d764336efd7a5a805555 upstream. The FT4232H used in the ST Micro Connect Lite has four hi-speed UART ports. The first two ports are reserved for the JTAG interface. We enable by default ports 2 and 3 as UARTs (where port 2 is a conventional RS-232 UART) Signed-off-by: Adrian Thomasset <adrian.thomasset@st.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Luis Henriques <luis.henriques@canonical.com> --- drivers/usb/serial/ftdi_sio.c | 18 +++++++++++------- 1 file changed, 11 insertions(+), 7 deletions(-) -- 1.8.1.2