linux-toradex.git/drivers/usb/storage/usb.c, branch v2.6.27.20

usb-storage: add last-sector hacks

2009-01-25T00:36:20+00:00

commit 25ff1c316f6a763f1eefe7f8984b2d8c03888432 upstream.

This patch (as1189d) adds some hacks to usb-storage for dealing with
the growing problems involving bad capacity values and last-sector
accesses:

	A new flag, US_FL_CAPACITY_OK, is created to indicate that
	the device is known to report its capacity correctly.  An
	unusual_devs entry for Linux's own File-backed Storage Gadget
	is added with this flag set, since g_file_storage always
	reports the correct capacity and since the capacity need
	not be even (it is determined by the size of the backing
	file).

	An entry in unusual_devs.h which has only the CAPACITY_OK
	flag set shouldn't prejudice libusual, since the device will
	work perfectly well with either usb-storage or ub.  So a
	new macro, COMPLIANT_DEV, is added to let libusual know
	about these entries.

	When a last-sector access fails three times in a row and
	neither the FIX_CAPACITY nor the CAPACITY_OK flag is set,
	we assume the last-sector bug is present.  We replace the
	existing status and sense data with values that will cause
	the SCSI core to fail the access immediately rather than
	retry indefinitely.  This should fix the difficulties
	people have been having with Nokia phones.

This version of the patch differs from the version accepted into the
mainline only in that it does not trigger a WARN() when an
odd-numbered last-sector access succeeds.  In a stable kernel series
we don't want to go around spamming users' logs and consoles for no
good reason.

Signed-off-by: Alan Stern 
Signed-off-by: Greg Kroah-Hartman

USB Storage: Sierra: Non-configurable TRU-Install

2008-09-23T20:58:05+00:00

This patch alters the Sierra Mass Storage patch so that it is non-configurable.

Signed-off-by: Kevin Lloyd 
Signed-off-by: Greg Kroah-Hartman

USB Storage Sierra: TRU-Install feature update

2008-08-14T00:32:51+00:00

This patch upgrades the support for the Sierra Wireless TRU-Install
feature (i.e. zeroCD) to allow for future support of Linux enabled
TRU-Install devices.

By default all devices that do not have a Linux enabled TRU-Install
device (i.e. the device does not have a Linux package on the virtual CD
partition) will be switched into "modem mode." Devices that do contain a
Linux package in the TRU-Install virtual CD will be allowed to enumerate
as a CD-Rom so that either (a) a user can install the packaged software
or (b) a user-space application (e.g. udev) can switch it to modem mode.

This patch does allow for manual override by adding a usb-storage module
parameter 'swi_tru_install' which can force the modem into either mode
regardless of what packages it contains.

Signed-off-by: Kevin Lloyd 
Signed-off-by: Greg Kroah-Hartman

USB: remove CVS keywords

2008-07-21T22:15:55+00:00

This patch removes CVS keywords that weren't updated for a long time
from comments.

Signed-off-by: Adrian Bunk 
Signed-off-by: Greg Kroah-Hartman

usb-storage: implement "soft" unbinding

2008-07-21T22:15:54+00:00

This patch (as1092) implements "soft" unbinding for usb-storage.  When
the disconnect routine is called, all commands and reset delays are
allowed to complete normally until after scsi_remove_host() returns.
This means that the commands needed for an orderly shutdown will be
sent through to the device.

Unlike before, the driver will now execute every command that it
accepts.  Hence there's no need for special code to catch unexecuted
commands and fail them.

The new sequence of events when disconnect runs goes as follows:

	If the device is truly unplugged, set the DISCONNECTING
	flag so we won't try to access it any more.

	If the SCSI-scanning thread hasn't started up yet, prevent
	it from doing anything by setting the new DONT_SCAN flag.
	Then wake it up and wait for it to terminate.

	Remove the SCSI host.  This unbinds the upper-level drivers,
	doing an orderly shutdown.  Commands sent to quiesce the
	device will be transmitted normally, unless the device is
	unplugged.

	Set the DISCONNECTING flag so that we won't accept any new
	commands that might get submitted (there aren't supposed to be
	any) and we won't try to access the device for resets.

	Tell the control thread to exit by waking it up with no
	pending command, and wait for it to terminate.

	Go on to do all the other normal stuff: releasing resources,
	freeing memory, and so on.

Signed-off-by: Alan Stern 
Signed-off-by: Greg Kroah-Hartman

usb-storage: change remaining semaphore to completion

2008-07-21T22:15:53+00:00

This patch (as1090) converts the one remaining semaphore in
usb-storage into a completion.

Signed-off-by: Alan Stern 
Cc: Matthew Dharm 
Signed-off-by: Greg Kroah-Hartman

usb-storage: separate dynamic flags from fixed flags

2008-07-21T22:15:53+00:00

This patch (as1089) separates out the dynamic atomic bitflags and the
static bitfields in usb-storage.  Until now the two sorts of flags
have been sharing the same word; this has always been awkward.

To help prevent possible confusion, the two new fields each have a
different name from the original.  us->fflags contains the fixed
bitfields (mostly taken from the USB ID table in unusual_devs.h), and
us->dflags contains the dynamic atomic bitflags (used with set_bit,
test_bit, and so on).

Signed-off-by: Alan Stern 
Cc: Matthew Dharm 
Signed-off-by: Greg Kroah-Hartman

USB: storage: Update mailling list address

2008-05-02T17:25:55+00:00

drivers/usb/storage/unusual_devs.h lists the address
linux-usb-devel@lists.sourceforge.net for patches to that file. This
address results in a bounce and a pointer to vger. This patch updates
the address in the header file.

Signed-off-by: Andrew Lunn 
Signed-off-by: Greg Kroah-Hartman

USB: replace remaining FUNCTION occurrences

2008-04-25T04:16:55+00:00

__FUNCTION__ is gcc-specific, use __func__

Signed-off-by: Harvey Harrison 
Signed-off-by: Greg Kroah-Hartman

USB: mass storage: emulation of sat scsi_pass_thru with ATACB

2008-04-25T04:16:42+00:00

I have got a cypress usb-ide bridge and I would like to tune or monitor
my disk with tools like hdparm, hddtemp or smartctl.

My controller support a way to send raw ATA command to the disk with
something call atacb (see
http://download.cypress.com.edgesuite.net/design_resources/datasheets/contents/cy7c68300c_8.pdf).

Atacb support can be added for each application, but there is some disadvantages :
- all application need to be patched
- A race is possible if there other accesses, because the emulation can
be split in 2 atacb scsi transactions. One for sending the command, one
for reading the register (if ck_cond is set). 

I have implemented the emulation in usb-storage with a special proto_handler,
and an unsual entry.

Signed-off-by: Matthieu CASTET 
Signed-off-by: Matthew Dharm 
Signed-off-by: Greg Kroah-Hartman