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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>
This commit is contained in:
Kevin Vance 2008-03-01 13:49:59 -05:00 committed by Greg Kroah-Hartman
parent 85fb62a001
commit 546d7eec38
2 changed files with 31 additions and 0 deletions
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24
drivers/usb/serial/ftdi_sio.c
View File

@ -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
*

7
drivers/usb/serial/ftdi_sio.h
View File

@ -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