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authorKevin Vance2008-03-01 13:49:59 -0500
committerGreg Kroah-Hartman2008-03-04 14:57:44 -0800
commit546d7eec389a3df3173b3131d92829c14e614601 (patch)
treed4b4deb3e0e4ed7875978aeef80620aad11c700c /drivers/usb/serial
parent85fb62a001278270f9fffbdc3508ef23d5f3693d (diff)
USB: ftdi_sio: Workaround for broken Matrix Orbital serial port
Workaround for the FT232RL-based, Matrix Orbital VK204-25-USB serial port added to the ftdi_sio driver. The device has an invalid endpoint descriptor, which must be modified before it can be used. Signed-off-by: Kevin Vance <kvance@kvance.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/serial')
-rw-r--r--drivers/usb/serial/ftdi_sio.c24
-rw-r--r--drivers/usb/serial/ftdi_sio.h7
2 files changed, 31 insertions, 0 deletions
diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c
index 76db2fef4657..17b2cc071ed8 100644
--- a/drivers/usb/serial/ftdi_sio.c
+++ b/drivers/usb/serial/ftdi_sio.c
@@ -92,6 +92,7 @@ struct ftdi_sio_quirk {
};
static int ftdi_jtag_probe (struct usb_serial *serial);
+static int ftdi_mtxorb_hack_setup (struct usb_serial *serial);
static void ftdi_USB_UIRT_setup (struct ftdi_private *priv);
static void ftdi_HE_TIRA1_setup (struct ftdi_private *priv);
@@ -99,6 +100,10 @@ static struct ftdi_sio_quirk ftdi_jtag_quirk = {
.probe = ftdi_jtag_probe,
};
+static struct ftdi_sio_quirk ftdi_mtxorb_hack_quirk = {
+ .probe = ftdi_mtxorb_hack_setup,
+};
+
static struct ftdi_sio_quirk ftdi_USB_UIRT_quirk = {
.port_probe = ftdi_USB_UIRT_setup,
};
@@ -161,6 +166,8 @@ static struct usb_device_id id_table_combined [] = {
{ USB_DEVICE(FTDI_VID, FTDI_MTXORB_4_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_MTXORB_5_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_MTXORB_6_PID) },
+ { USB_DEVICE(MTXORB_VK_VID, MTXORB_VK_PID),
+ .driver_info = (kernel_ulong_t)&ftdi_mtxorb_hack_quirk },
{ USB_DEVICE(FTDI_VID, FTDI_PERLE_ULTRAPORT_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_PIEGROUP_PID) },
{ USB_DEVICE(FTDI_VID, FTDI_TNC_X_PID) },
@@ -1088,6 +1095,23 @@ static int ftdi_jtag_probe(struct usb_serial *serial)
return 0;
}
+/*
+ * The Matrix Orbital VK204-25-USB has an invalid IN endpoint.
+ * We have to correct it if we want to read from it.
+ */
+static int ftdi_mtxorb_hack_setup(struct usb_serial *serial)
+{
+ struct usb_host_endpoint *ep = serial->dev->ep_in[1];
+ struct usb_endpoint_descriptor *ep_desc = &ep->desc;
+
+ if (ep->enabled && ep_desc->wMaxPacketSize == 0) {
+ ep_desc->wMaxPacketSize = 0x40;
+ info("Fixing invalid wMaxPacketSize on read pipe");
+ }
+
+ return 0;
+}
+
/* ftdi_shutdown is called from usbserial:usb_serial_disconnect
* it is called when the usb device is disconnected
*
diff --git a/drivers/usb/serial/ftdi_sio.h b/drivers/usb/serial/ftdi_sio.h
index 6eee2ab914ec..e1eb742abcd5 100644
--- a/drivers/usb/serial/ftdi_sio.h
+++ b/drivers/usb/serial/ftdi_sio.h
@@ -102,6 +102,13 @@
* (http://www.joernonline.de/dw/doku.php?id=start&idx=projects:oocdlink) */
#define FTDI_OOCDLINK_PID 0xbaf8 /* Amontec JTAGkey */
+/*
+ * The following are the values for the Matrix Orbital VK204-25-USB
+ * display, which use the FT232RL.
+ */
+#define MTXORB_VK_VID 0x1b3d
+#define MTXORB_VK_PID 0x0158
+
/* Interbiometrics USB I/O Board */
/* Developed for Interbiometrics by Rudolf Gugler */
#define INTERBIOMETRICS_VID 0x1209