kernel-fxtec-pro1x/drivers/usb
Sarah Sharp cab928ee1f USB: Fix handoff when BIOS disables host PCI device.
On some systems with an Intel Panther Point xHCI host controller, the
BIOS disables the xHCI PCI device during boot, and switches the xHCI
ports over to EHCI.  This allows the BIOS to access USB devices without
having xHCI support.

The downside is that the xHCI BIOS handoff mechanism will fail because
memory mapped I/O is not enabled for the disabled PCI device.
Jesse Barnes says this is expected behavior.  The PCI core will enable
BARs before quirks run, but it will leave it in an undefined state, and
it may not have memory mapped I/O enabled.

Make the generic USB quirk handler call pci_enable_device() to re-enable
MMIO, and call pci_disable_device() once the host-specific BIOS handoff
is finished.  This will balance the ref counts in the PCI core.  When
the PCI probe function is called, usb_hcd_pci_probe() will call
pci_enable_device() again.

This should be back ported to kernels as old as 2.6.31.  That was the
first kernel with xHCI support, and no one has complained about BIOS
handoffs failing due to memory mapped I/O being disabled on other hosts
(EHCI, UHCI, or OHCI).

Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Acked-by: Oliver Neukum <oneukum@suse.de>
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
Cc: stable@vger.kernel.org
2012-02-21 15:45:08 -08:00
..
atm module_param: make bool parameters really bool (drivers & misc) 2012-01-13 09:32:20 +10:30
c67x00
class USB: cdc-wdm: Avoid hanging on interface with no USB_CDC_DMM_TYPE 2012-01-24 14:38:58 -08:00
core USB: Don't fail USB3 probe on missing legacy PCI IRQ. 2012-02-14 10:48:05 -08:00
dwc3 usb: dwc3: unmap the proper number of sg entries 2012-01-24 15:43:17 +02:00
early
gadget usb: gadget: zero: fix bug in loopback autoresume handling 2012-01-30 11:10:20 +02:00
host USB: Fix handoff when BIOS disables host PCI device. 2012-02-21 15:45:08 -08:00
image
misc USB: usbsevseg: fix max length 2012-01-24 12:08:36 -08:00
mon
musb usb: musb: fix a build error on mips 2012-02-03 09:29:13 +02:00
otg usb: otg: mv_otg: Add dependence 2012-02-02 12:46:35 -08:00
renesas_usbhs usb: renesas: silence uninitialized variable report in usbhsg_recip_run_handle() 2012-01-24 15:43:06 +02:00
serial USB: option: cleanup zte 3g-dongle's pid in option.c 2012-02-14 15:08:40 -08:00
storage USB: Realtek cr: fix autopm scheduling while atomic 2012-01-26 11:22:41 -08:00
wusbcore uwb & wusb: fix kconfig error 2012-01-26 11:22:42 -08:00
Kconfig USB: Add Samsung Exynos OHCI diver 2011-12-23 11:21:56 +09:00
Makefile
README
usb-common.c
usb-skeleton.c Revert "USB: usb-skeleton.c: fix open/disconnect race" 2012-01-24 12:02:38 -08:00

To understand all the Linux-USB framework, you'll use these resources:

    * This source code.  This is necessarily an evolving work, and
      includes kerneldoc that should help you get a current overview.
      ("make pdfdocs", and then look at "usb.pdf" for host side and
      "gadget.pdf" for peripheral side.)  Also, Documentation/usb has
      more information.

    * The USB 2.0 specification (from www.usb.org), with supplements
      such as those for USB OTG and the various device classes.
      The USB specification has a good overview chapter, and USB
      peripherals conform to the widely known "Chapter 9".

    * Chip specifications for USB controllers.  Examples include
      host controllers (on PCs, servers, and more); peripheral
      controllers (in devices with Linux firmware, like printers or
      cell phones); and hard-wired peripherals like Ethernet adapters.

    * Specifications for other protocols implemented by USB peripheral
      functions.  Some are vendor-specific; others are vendor-neutral
      but just standardized outside of the www.usb.org team.

Here is a list of what each subdirectory here is, and what is contained in
them.

core/		- This is for the core USB host code, including the
		  usbfs files and the hub class driver ("khubd").

host/		- This is for USB host controller drivers.  This
		  includes UHCI, OHCI, EHCI, and others that might
		  be used with more specialized "embedded" systems.

gadget/		- This is for USB peripheral controller drivers and
		  the various gadget drivers which talk to them.


Individual USB driver directories.  A new driver should be added to the
first subdirectory in the list below that it fits into.

image/		- This is for still image drivers, like scanners or
		  digital cameras.
../input/	- This is for any driver that uses the input subsystem,
		  like keyboard, mice, touchscreens, tablets, etc.
../media/	- This is for multimedia drivers, like video cameras,
		  radios, and any other drivers that talk to the v4l
		  subsystem.
../net/		- This is for network drivers.
serial/		- This is for USB to serial drivers.
storage/	- This is for USB mass-storage drivers.
class/		- This is for all USB device drivers that do not fit
		  into any of the above categories, and work for a range
		  of USB Class specified devices. 
misc/		- This is for all USB device drivers that do not fit
		  into any of the above categories.