This reverts commit 034d1527.

Revert all of the pl2303 changes that went into 3.12-rc1 and -rc2 as
they cause regressions on some versions of the chip.  This will all be
revisited for later kernel versions when we can figure out how to handle
this in a way that does not break working devices.
Reported-by: NMika Westerberg <mika.westerberg@linux.intel.com>
Cc: Frank Schäfer <fschaefer.oss@googlemail.com>
Acked-by: NJohan Hovold <jhovold@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

This reverts commit 7d26a78f.

Revert all of the pl2303 changes that went into 3.12-rc1 and -rc2 as
they cause regressions on some versions of the chip.  This will all be
revisited for later kernel versions when we can figure out how to handle
this in a way that does not break working devices.
Reported-by: NMika Westerberg <mika.westerberg@linux.intel.com>
Cc: Frank Schäfer <fschaefer.oss@googlemail.com>
Acked-by: NJohan Hovold <jhovold@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Interface 6 of this device speaks QMI as per tests done by us.
Credits go to Antonella for providing the hardware.
Signed-off-by: NEnrico Mioso <mrkiko.rs@gmail.com>
Signed-off-by: NAntonella Pellizzari <anto.pellizzari83@gmail.com>
Tested-by: NDan Williams <dcbw@redhat.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

This patch adds the device id for the Inovia SEW858 device to the option driver.
Reported-by: NPavel Parkhomenko <ra85551@gmail.com>
Tested-by: NPavel Parkhomenko <ra85551@gmail.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Without this change, the USB cable for Freestyle Option and compatible
glucometers will not be detected by the driver.
Signed-off-by: NDiego Elio Pettenò <flameeyes@flameeyes.eu>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Add new supporting declarations to option.c, to support Huawei new
devices with new bInterfaceSubClass value.
Signed-off-by: Nfangxiaozhi <huananhu@huawei.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Hi,

my Huawei 3G modem has an embedded Smart Card reader which causes
trouble when the modem is being detected (a bunch of "<warn>  (ttyUSBx):
open blocked by driver for more than 7 seconds!" in messages.log). This
trivial patch corrects the problem for me. The modem identifies itself
as "12d1:1406 Huawei Technologies Co., Ltd. E1750" in lsusb although the
description on the body says "Model E173u-1"
Signed-off-by: NMichal Malý <madcatxster@prifuk.cz>
Cc: Bjørn Mork <bjorn@mork.no>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

According to Prolific, several (unauthorized) cheap and less functional
clones of the PL2303HX chip are in circulation. [1]
I've had the chance to test such a cloned device and it turned out that
it doesn't support any baud rates above 115200 baud (original: 6 Mbaud)
It also doesn't support the divisior based baud rate encoding method,
so no continuous baud rate adjustment is possible.
Nevertheless, these devices have been working (unintentionally) with
the driver up to commit 61fa8d69 ("pl2303: also use the divisor based
baud rate encoding method for baud rates < 115200 with HX chips"), and
this commit broke support for them.
Fortunately, it is pretty simple to distinguish between the original
and the cloned HX chips, so I've added a check and an extra chip type
to keep the clones working.
The same check is used by the latest Prolific Windows driver, so it
should be solid.

[1] http://www.prolific.com.tw/US/ShowProduct.aspx?p_id=225&pcid=41Signed-off-by: NFrank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Signed-off-by: NDave Jones <davej@fedoraproject.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Clean up the DEVICE_ATTR usage in the USB serial drivers, making them
more obvious as to the permissions that the sysfs files should be.

Note: ftdi_sio.c still has a DEVICE_ATTR() used, that will have to wait
until after 3.12-rc1 comes out when DEVICE_ATTR_WO() shows up in Linus's
tree.
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

The drv_attrs field of struct bus_type is going away soon, drv_groups
should be used instead.  This converts the USB serial bus code to use
the correct field.
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Fix endianess bugs in parallel-port code which caused corrupt
control-requests to be issued on big-endian machines.
Reported-by: Nkbuild test robot <fengguang.wu@intel.com>
Cc: stable@vger.kernel.org
Signed-off-by: NJohan Hovold <jhovold@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

The write_parport_reg_nonblock() function shouldn't sleep because it's
called with spinlocks held.
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Cc: stable@vger.kernel.org
Acked-by: NJohan Hovold <jhovold@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

usb-serial-simple uses an unknown stringify macro that make
all drivers being named "stringify(vendor)".

This can be a problem when two drivers have the same (wrong) name:

    kernel: usbcore: registered new interface driver usb_serial_simple
    kernel: usbserial: USB Serial support registered for stringify(vendor)
    kernel Error: Driver 'stringify(vendor)' is already registered, aborting...
    kernel: usbserial: problem -16 when registering driver stringify(vendor)
    kernel: usbserial: USB Serial deregistering driver stringify(vendor)
    kernel: usbcore: deregistering interface driver usb_serial_simple

Before the fix:

    $ strings drivers/usb/serial/usb-serial-simple.o
    usb_serial_simple
    stringify(vendor)

After the fix:

    $ strings drivers/usb/serial/usb-serial-simple.o
    usb_serial_simple
    funsoft
    flashloader
    vivopay
    moto_modem
    hp4x
    suunto
    siemens_mpi

This patch makes usb-serial-simple use the correct stringify operator.
Signed-off-by: NYann Droneaud <ydroneaud@opteya.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Make sure serial DMA-buffers are allocated separately from containing
structure to prevent potential memory corruption on non-cache-coherent
systems.
Signed-off-by: NJohan Hovold <jhovold@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Make sure serial DMA-buffers are allocated separately from containing
structure to prevent potential memory corruption on non-cache-coherent
systems.
Signed-off-by: NJohan Hovold <jhovold@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Make sure port DMA-buffers are allocated separately from containing
structure to prevent potential memory corruption on non-cache-coherent
systems.
Signed-off-by: NJohan Hovold <jhovold@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Make sure serial DMA-buffers are allocated separately from containing
structure to prevent potential memory corruption on non-cache-coherent
systems.
Signed-off-by: NJohan Hovold <jhovold@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Make sure to fail properly if the device is not accepted during attach
in order to avoid null-pointer derefs (of missing interface private
data) at disconnect or release.

Cc: stable@vger.kernel.org
Signed-off-by: NJohan Hovold <jhovold@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

The parallel-port code of the drivers used a stack allocated
control-request buffer for asynchronous (and possibly deferred) control
requests. This not only violates the no-DMA-from-stack requirement but
could also lead to corrupt control requests being submitted.

Cc: stable@vger.kernel.org
Signed-off-by: NJohan Hovold <jhovold@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

The driver currently knows about 3 different PL2303 chip types:
The two legacy chip types type_0 and type_1 (PL2303H ?) and the HX
type.
The device distinction is currently completely based on the examination
of the USB descriptors.
During the last years, Prolific has introduced further PL2303 chips,
such as the HXD (HX rev. D), TA (which replaced the X/HX chips), SA,
RA, EA and TB variants.
Unfortunately, all these new chips are currently detected as HX chips,
because they are all using the same bMaxPacketSize0 = 0x40 value in the
USB device descriptor.

At this point it is not clear if these chips are really working with
the driver, there are just some positive indicators (like device
manufacturers claiming Linux support for these devices or commit
8d48fdf6 "correctly handle baudrates above 115200" which should only
be necessary for newer devices, ...)

For a complete support of all devices, we need to distinguish between
them, because they differ in several functional aspects, such  as the
maximum supported baud rate (HXD, TB, EA: 12Mbps, HX, TA: 6Mbps,
RA: 1Mbps, SA: 115.2kbps), handshaking line support, RS422/485 and
GPIO ports support (currently not supported by the driver).
And there might be further differences that we don't know yet.

This patch improves the chip type detection by evaluating the bcdDevice
value of the device descriptor. The values are taken from the
datasheets and are safe to use because manufacturers can't change them:

3.00: X/HX, TA
4.00: HXD, EA, RA, SA
5.00: TB

The rest of the device descriptors is completely identical, so no
further distinction is possible this way.
Anyway, Prolifics "checkChipVersion.exe"-tool is definitely able to
distinguish for example between the X/HX and the TA chips, so there
must be a possibility to improve the distinction further...
Signed-off-by: NFrank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

The chip type distinction is getting more and more relevant and
complicating, so always print the chip type.
Printing a name string is also much better than just printing an
internal index number.
Signed-off-by: NFrank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

There is no need for two else-if constructs for the type_1 chip
detection in pl2303_startup(), so merge them.
Signed-off-by: NFrank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

I've found some new datasheets which describe some additionally
supported standard baud rates and I've verified them with my HX
(rev. 3A) device. But adding support for individual (chip type
specific) baud rates would add a good amount of extra code (especially
when support for further chips will be added to the driver one day),
which makes no sense as long as we are not using the direct baud rate
encoding method for newer chips.
So for now, just drop a comment about these additionally supported baud
rates.

The second comment is about the baud rate differences between the two
encoding methods. In theory, we could optimize the code a bit by
comparing the resulting baud rates of both methods and selecting the
one which is closer to the requested baud rate. But that seems to be a
bit overkill, because the differences are very small and the device
likely uses the same baud rate generator for both methods so that the
resulting baud rate would be the same.
Signed-off-by: NFrank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

usb: pl2303: also use the divisor based baud rate encoding method for baud rates < 115200 with HX chips

Now that the divisor based baud rate encoding method has been fixed and
extended, it can also be used for baud rates < 115200 baud with HX
chips.
This makes it possible to adjust the baud rate almost continuously
instead of just beeing able to select between 16 fixed standard values.

Tested with a PL2303HX 04463A (week 46, 2004, rev 3A).
Signed-off-by: NFrank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Reinhard Max has done some tests with a PL2303HX (rev A) and a logic
analyzer and it seems, that although the PL2303HX is specified for baud
rates from 75 to 6M baud, the full divisor range can be used with the
divisor based baud rate encoding method. This corresponds to baud rates
from 46 to 24M baud.
Baud rates down to 46 baud (max. divisor) have been confirmed to work
even under heavy/permanent load, so remove the lower limit.
Baud rates up to 24M baud should really be tested carefully in "real
life" scenarios before removing the upper limit completely.
Anyway, the Windows driver allows maximum baud rates of 110% of the
specified limit, so for now, increase the upper limit to this value.
Signed-off-by: NFrank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: NReinhard Max <max@suse.de>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Signed-off-by: NFrank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Commit 0c967e7e "USB: serial: pl2303 works at 500kbps" added 500000
baud to the list of supported standard baud rates.
But the reason why the driver works with this baud rate is, that since
commit 8d48fdf6 "USB: PL2303: correctly handle baudrates above 115200"
a second (divisor based) baud rate encoding method is used for values
above 115200 baud, which is not limited to a fixed set of standard baud
rates.

Remove the 500000 baud value from the list of standard baud rates
again, because this list is only used with the direct baud rate
encoding method and 500000 baud is not supported with this method.
Signed-off-by: NFrank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

usb: pl2303: do not round to the next nearest standard baud rate for the divisor based baud rate encoding method

In opposition to the direct baud rate encoding method, the divisor
based method is not limited to a fixed set of standard baud rates.
Hence, there is no need to round to the next nearest standard value.
Reported-by: NMastro Gippo <gipmad@gmail.com>
Signed-off-by: NFrank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: NReinhard Max <max@suse.de>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Based on the formula in the code description, Reinhard Max and me have
investigated the devices behavior / functional principle of the divisor
based baud rate encoding method.

It turned out, that (although beeing a good starting point) the current
code has some flaws. It doesn't work correctly for a wide range of baud
rates and the divisor resolution can be improved. It also doesn't
report the actually set baud rate.

This patch fixes and improves the code for the divisor based baud rate
encoding method a lot. It can now be used for the whole range of baud
rates from 46 baud to 24M baud with a very good divisor resolution and
userspace can read back the resulting baud rate.

It also documents the formula used for encoding and the hardware
behavior (including special cases).

The basic algorithm, rounding and several code comments/explanations
are provided by Reinhard Max.
I've added some minor fixes, the handling of the special cases and
further code/algorithm descriptions.
Signed-off-by: NFrank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: NReinhard Max <max@suse.de>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Fix endianess bugs in firmware handling introduced by commits cb7a7c6a
("ti_usb_3410_5052: add Multi-Tech modem support") and 05a3d905
("ti_usb_3410_5052: support alternate firmware") which made the driver
use the wrong firmware for certain devices on big-endian machines.

Cc: stable@vger.kernel.org
Signed-off-by: NJohan Hovold <jhovold@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Fix bug in device-type detection on big-endian machines originally
introduced by commit 0eafe4de ("USB: serial: mos7840: add support for
MCS7810 devices") which always matched on little-endian product ids.
Reported-by: Nkbuild test robot <fengguang.wu@intel.com>
Cc: stable@vger.kernel.org
Signed-off-by: NJohan Hovold <jhovold@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

This fixes an issue where the bulk-in urb used for incoming data transfer
is not resubmitted if the packet recieved contains an error status.  This
results in the driver locking until the port is closed and re-opened.

Tested on a custom board with a Cinterion GSM module.
Signed-off-by: NMatt Burtch <matt@grid-net.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Instead of having to create a new driver for a "simple" usb to serial
device, mush them all into one file, with a macro, so as to make it easy
to add new ones.

Cc: "René Bürgel" <rene.buergel@sohard.de>
Acked-by: NWei Shuai <cpuwolf@gmail.com>
Cc: Josh Triplett <josh@joshtriplett.org>
Acked-by: NFrans Klaver <frans.klaver@xsens.com>
Cc: "Wesley W. Terpstra" <w.terpstra@gsi.de>
Cc: Johan Hovold <jhovold@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

It's not clear if the type_0 and type_1 chips support the divisor based baud
rate encoding method, so don't use it until anyone with such chip has tested it
to avoid regressions with the following patches.

Even if it has been working fine with these chips since the code has been added
2 years ago, this change will not cause any regressions, because the baud rates
currently supported/allowed with the divisor based method are supported with
the direct method, too.

The code for the divisor based method also isn't entirely correct (yet), so that the
direct encoding method actually works better (sets the baud rate more precisely).
Signed-off-by: NFrank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

RT Systems makes many usb serial cables based on the ftdi_sio driver for
programming various amateur radios.  This patch is a full listing of
their current product offerings and should allow these cables to all
be recognized.
Signed-off-by: NRick Farina (Zero_Chaos) <zerochaos@gentoo.org>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Fixes the following regression that has been introduced recently with
commit b2d6d98f:
With type_0 and type_1 chips
- all baud rates < 1228800 baud are rounded up to 1228800 baud
- the device silently runs at 9600 baud for all baud rates > 1228800
  baud
Signed-off-by: NFrank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Silence compiler warnings on 64-bit systems introduced by commit
05cf0dec ("USB: mos7840: fix race in led handling") which uses the
usb-serial data pointer to temporarily store the device type during
probe but failed to add the required casts.

[gregkh - change uintptr_t to unsigned long]

Cc: stable@vger.kernel.org
Signed-off-by: NJohan Hovold <jhovold@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Fix race in LED handling introduced by commit 0eafe4de ("USB: serial:
mos7840: add support for MCS7810 devices") which reused the port control
urb for manipulating the LED without making sure that the urb is not
already in use. This could lead to the control urb being manipulated
while in flight.

Fix by adding a dedicated LED urb and ctrlrequest along with a LED-busy
flag to handle concurrency.

Cc: stable@vger.kernel.org
Signed-off-by: NJohan Hovold <jhovold@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Fix race in device-type detection introduced by commit 0eafe4de ("USB:
serial: mos7840: add support for MCS7810 devices") which used a static
variable to hold the device type.

Move type detection to probe and use serial data to store the device
type.

Cc: stable@vger.kernel.org
Signed-off-by: NJohan Hovold <jhovold@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>