diff options
| author | Kevin Vance <kvance@kvance.com> | 2008-03-01 13:49:59 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2008-03-04 14:57:44 -0800 |
| commit | 546d7eec389a3df3173b3131d92829c14e614601 (patch) | |
| tree | d4b4deb3e0e4ed7875978aeef80620aad11c700c /drivers/usb/serial/ftdi_sio.c | |
| parent | 85fb62a001278270f9fffbdc3508ef23d5f3693d (diff) | |
| download | lwn-546d7eec389a3df3173b3131d92829c14e614601.tar.gz lwn-546d7eec389a3df3173b3131d92829c14e614601.zip | |
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/ftdi_sio.c')
| -rw-r--r-- | drivers/usb/serial/ftdi_sio.c | 24 |
1 files changed, 24 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 * |