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  1. 01 Feb, 2010 1 commit
    • Alberto Panizzo's avatar
      Input: add imx-keypad driver to support the IMX Keypad Port · 76cdc083
      Alberto Panizzo authored 
      The IMX family of Application Processors is shipped with a Keypad Port
supported by this driver.

The peripheral can control up to an 8x8 matrix key pad where all the
scanning is done via software.  The hardware provides two interrupts:
one for key presses (KDI) and one for all key releases (KRI). There is
also a simple circuit for glitch reduction (said for synchronization)
made by two series of 3 D-latches clocked by the keypad-clock that
stabilize the interrupts sources. KDI and KRI are fired only if the
respective conditions are maintained for at last 4 keypad-clock cycle.

Since those circuits are poor for a correct debounce process (the
keypad-clock frequency is 32K and bounces longer than 94us are not
masked) the driver, when an interrupt arrives, samples the matrix
with a period of 10ms until the readins are stable for
IMX_KEYPAD_SCANS_FOR_STABILITY times (currently set at 3). After
getting stable result appropriate events are sent through the input
stack.

If some keys are maintained pressed, the driver continues to scan
the matrix with a longer period (60ms) to catch possible multiple
key presses without overloading the cpu. This process ends when all
keys are released.

This driver is tested to build in kernel or as a module and follow
the specification of Freescale Application processors:
i.MX25 i.MX27 i.MX31 i.MX35 i.MX51 especially tested on i.MX31.
Signed-off-by: default avatarAlberto Panizzo <maramaopercheseimorto@gmail.com>
Signed-off-by: default avatarDmitry Torokhov <dtor@mail.ru>
      76cdc083
  3. 30 Jan, 2010 4 commits
    • Dmitry Torokhov's avatar
      Input: Mac button emulation - allow compiling as a module · 429722e1
      Dmitry Torokhov authored 
      Not all systems require Mac-style button emulation, however distributions
enable it by default so it is readily available. Allow compiling it as a
module so it can be loaded only on systems that actually require it.
Signed-off-by: default avatarDmitry Torokhov <dtor@mail.ru>
      429722e1
    • Dmitry Torokhov's avatar
      Input: Mac button emulation - implement as an input filter · 99b089c3
      Dmitry Torokhov authored 
      Current implementation of Mac mouse button emulation plugs into legacy
keyboard driver, converts certain keys into button events on a separate
device, and suppresses the real events from reaching tty. This worked
well enough until user space started using evdev which was completely
unaware of this arrangement and kept sending original key presses to
its users. Change the implementation to use newly added input filter
framework so that original key presses are not transmitted to any
handlers.

As a bonus remove SYSCTL dependencies from the code and use Kconfig
instead; also do not create the emulated mouse device until user
activates emulation.
Signed-off-by: default avatarDmitry Torokhov <dtor@mail.ru>
      99b089c3
    • Dmitry Torokhov's avatar
      Input: implement input filters · ef7995f4
      Dmitry Torokhov authored 
      Sometimes it is desirable to suppress certain events from reaching
input handlers and thus user space. One such example is Mac mouse
button emulation code which catches certain key presses and converts
them into button clicks as if they were emitted by a virtual mouse.
The original key press events should be completely suppressed,
otherwise user space will be confused, and while keyboard driver
does it on its own evdev is blissfully unaware of this arrangement.

This patch adds notion of 'filter' to the standard input handlers,
which may flag event as filtered thus preventing it from reaching
other input handlers. Filters don't (nor will they ever) have a
notion of priority relative to each other, input core will run all
of them first and any one of them may mark event as filtered.

This patch is inspired by similar patch by Matthew Garret but the
implementation and intended usage are quite different.
Signed-off-by: default avatarDmitry Torokhov <dtor@mail.ru>
      ef7995f4
    • Thadeu Lima de Souza Cascardo's avatar
      Input: uinput - remove BKL from uinput_open function · 45cdba4d
      Thadeu Lima de Souza Cascardo authored 
      Commit 87029658 pushed down the BKL
into uinput open function. However, there's nothing that needs locking
in there.
Signed-off-by: default avatarThadeu Lima de Souza Cascardo <cascardo@holoscopio.com>
Signed-off-by: default avatarDmitry Torokhov <dtor@mail.ru>
      45cdba4d
  5. 29 Jan, 2010 1 commit
  7. 25 Jan, 2010 2 commits
  9. 22 Jan, 2010 1 commit
  11. 21 Jan, 2010 22 commits
  13. 20 Jan, 2010 9 commits
    • Lothar Wassmann's avatar
      USB: isp1362: fix build failure on ARM systems via irq_flags cleanup · 0a2fea2e
      Lothar Wassmann authored 
      There was some left over #ifdef ARM logic that is outdated but no one
really noticed.  So instead of relying on this tricky logic, properly
load and utilize the platform irq_flags resources.
Reported-by: default avatarBen Hutchings <ben@decadent.org.uk>
Signed-off-by: default avatarLothar Wassmann <LW@KARO-electronics.de>
Signed-off-by: default avatarMike Frysinger <vapier@gentoo.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
      0a2fea2e
    • Lothar Wassmann's avatar
      USB: isp1362: better 64bit printf warning fixes · 96b85179
      Lothar Wassmann authored 
      Some hosts that treat the return value of sizeof differently from unsigned
long might still hit warnings.  So use %zu for sizeof() values.  This is a
better version of the previous commit b0a9cf29.
Signed-off-by: default avatarLothar Wassmann <LW@KARO-electronics.de>
Signed-off-by: default avatarMike Frysinger <vapier@gentoo.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
      96b85179
    • Ryan May's avatar
      USB: fix usbstorage for 2770:915d delivers no FAT · 10d2cdb6
      Ryan May authored 
      Resolves kernel.org bug 14914.

Remove entry for 2770:915d (usb digital camera with mass storage
support) from unusual_devs.h. The fix triggered by the entry causes
the file system on the camera to be completely inaccessible (no
partition table, the device is not mountable).

The patch works, but let me clarify a few things about it.  All the
patch does is remove the entry for this device from the
drivers/usb/storage/unusual_devs.h, which is supposed to help with a
problem with the device's reported size (I think).  I'm pretty sure it
was originally added for a reason, so I'm not sure removing it won't
cause other problems to reappear.  Also, I should note that this
unusual_devs.h entry was present (and activating workarounds) in
2.6.29, but in that version everything works fine.  Starting with
2.6.30, things no longer work.
Signed-off-by: default avatarRyan May <rmay31@gmail.com>
Cc: Rohan Hart <rohan.hart17@gmail.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
      10d2cdb6
    • Colin Tuckley's avatar
      USB: Fix level of isp1760 Reloading ptd error message · c0d74142
      Colin Tuckley authored 
      This error message is not actually an error, it's an information
message. It is triggered when a transfer which ended in a NAQ is
retried successfully by the hardware.
Signed-off-by: default avatarColin Tuckley <colin.tuckley@arm.com>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
      c0d74142
    • Alexander Beregalov's avatar
      USB: FHCI: avoid NULL pointer dereference · ae35fe9e
      Alexander Beregalov authored 
      Assign fhci only if usb is not NULL.
Signed-off-by: default avatarAlexander Beregalov <a.beregalov@gmail.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
      ae35fe9e
    • Sarah Sharp's avatar
      USB: Fix duplicate sysfs problem after device reset. · 04a723ea
      Sarah Sharp authored 
      Borislav Petkov reports issues with duplicate sysfs endpoint files after a
resume from a hibernate.  It turns out that the code to support alternate
settings under xHCI has issues when a device with a non-default alternate
setting is reset during the hibernate:

[  427.681810] Restarting tasks ...
[  427.681995] hub 1-0:1.0: state 7 ports 6 chg 0004 evt 0000
[  427.682019] usb usb3: usb resume
[  427.682030] ohci_hcd 0000:00:12.0: wakeup root hub
[  427.682191] hub 1-0:1.0: port 2, status 0501, change 0000, 480 Mb/s
[  427.682205] usb 1-2: usb wakeup-resume
[  427.682226] usb 1-2: finish reset-resume
[  427.682886] done.
[  427.734658] ehci_hcd 0000:00:12.2: port 2 high speed
[  427.734663] ehci_hcd 0000:00:12.2: GetStatus port 2 status 001005 POWER sig=se0 PE CONNECT
[  427.746682] hub 3-0:1.0: hub_reset_resume
[  427.746693] hub 3-0:1.0: trying to enable port power on non-switchable hub
[  427.786715] usb 1-2: reset high speed USB device using ehci_hcd and address 2
[  427.839653] ehci_hcd 0000:00:12.2: port 2 high speed
[  427.839666] ehci_hcd 0000:00:12.2: GetStatus port 2 status 001005 POWER sig=se0 PE CONNECT
[  427.847717] ohci_hcd 0000:00:12.0: GetStatus roothub.portstatus [1] = 0x00010100 CSC PPS
[  427.915497] hub 1-2:1.0: remove_intf_ep_devs: if: ffff88022f9e8800 ->ep_devs_created: 1
[  427.915774] hub 1-2:1.0: remove_intf_ep_devs: bNumEndpoints: 1
[  427.915934] hub 1-2:1.0: if: ffff88022f9e8800: endpoint devs removed.
[  427.916158] hub 1-2:1.0: create_intf_ep_devs: if: ffff88022f9e8800 ->ep_devs_created: 0, ->unregistering: 0
[  427.916434] hub 1-2:1.0: create_intf_ep_devs: bNumEndpoints: 1
[  427.916609]  ep_81: create, parent hub
[  427.916632] ------------[ cut here ]------------
[  427.916644] WARNING: at fs/sysfs/dir.c:477 sysfs_add_one+0x82/0x96()
[  427.916649] Hardware name: System Product Name
[  427.916653] sysfs: cannot create duplicate filename '/devices/pci0000:00/0000:00:12.2/usb1/1-2/1-2:1.0/ep_81'
[  427.916658] Modules linked in: binfmt_misc kvm_amd kvm powernow_k8 cpufreq_ondemand cpufreq_powersave cpufreq_userspace freq_table cpufreq_conservative ipv6 vfat fat
+8250_pnp 8250 pcspkr ohci_hcd serial_core k10temp edac_core
[  427.916694] Pid: 278, comm: khubd Not tainted 2.6.33-rc2-00187-g08d869aa-dirty #13
[  427.916699] Call Trace:

The problem is caused by a mismatch between the USB core's view of the
device state and the USB device and xHCI host's view of the device state.

After the device reset and re-configuration, the device and the xHCI host
think they are using alternate setting 0 of all interfaces.  However, the
USB core keeps track of the old state, which may include non-zero
alternate settings.  It uses intf->cur_altsetting to keep the endpoint
sysfs files for the old state across the reset.

The bandwidth allocation functions need to know what the xHCI host thinks
the current alternate settings are, so original patch set
intf->cur_altsetting to the alternate setting 0.  This caused duplicate
endpoint files to be created.

The solution is to not set intf->cur_altsetting before calling
usb_set_interface() in usb_reset_and_verify_device().  Instead, we add a
new flag to struct usb_interface to tell usb_hcd_alloc_bandwidth() to use
alternate setting 0 as the currently installed alternate setting.
Signed-off-by: default avatarSarah Sharp <sarah.a.sharp@linux.intel.com>
Tested-by: default avatarBorislav Petkov <petkovbb@googlemail.com>
Cc: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
      04a723ea
    • Greg Kroah-Hartman's avatar
      USB: add speed values for USB 3.0 and wireless controllers · b132b04e
      Greg Kroah-Hartman authored 
      These controllers say "unknown" for their speed in sysfs, which
obviously isn't correct.
Reported-by: default avatarKurt Garloff <garloff@novell.com>
Cc: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Cc: David Vrabel <david.vrabel@csr.com>
Cc: stable <stable@kernel.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
      b132b04e
    • Alan Stern's avatar
      USB: add missing delay during remote wakeup · 49d0f078
      Alan Stern authored 
      This patch (as1330) fixes a bug in khbud's handling of remote
wakeups.  When a device sends a remote-wakeup request, the parent hub
(or the host controller driver, for directly attached devices) begins
the resume sequence and notifies khubd when the sequence finishes.  At
this point the port's SUSPEND feature is automatically turned off.

However the device needs an additional 10-ms resume-recovery time
(TRSMRCY in the USB spec).  Khubd does not wait for this delay if the
SUSPEND feature is off, and as a result some devices fail to behave
properly following a remote wakeup.  This patch adds the missing
delay to the remote-wakeup path.

It also extends the resume-signalling delay used by ehci-hcd and
uhci-hcd from 20 ms (the value in the spec) to 25 ms (the value we use
for non-remote-wakeup resumes).  The extra time appears to help some
devices.
Signed-off-by: default avatarAlan Stern <stern@rowland.harvard.edu>
Cc: stable <stable@kernel.org>
Cc: Rickard Bellini <rickard.bellini@ericsson.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
      49d0f078
    • Alan Stern's avatar
      USB: EHCI & UHCI: fix race between root-hub suspend and port resume · cec3a53c
      Alan Stern authored 
      This patch (as1321) fixes a problem with EHCI and UHCI root-hub
suspends: If the suspend occurs while a port is trying to resume, the
resume doesn't finish and simply gets lost.  When remote wakeup is
enabled, this is undesirable behavior.

The patch checks first to see if any port resumes are in progress, and
if they are then it fails the root-hub suspend with -EBUSY.
Signed-off-by: default avatarAlan Stern <stern@rowland.harvard.edu>
Cc: stable <stable@kernel.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
      cec3a53c