linux_dsm_epyc7002/drivers/usb
Shen Guang 08d1dec6f4 usb:hub set hub->change_bits when over-current happens
When we are doing compliance test with xHCI, we found that if we
enable CONFIG_USB_SUSPEND and plug in a bad device which causes
over-current condition to the root port, software will not be noticed.
The reason is that current code don't set hub->change_bits in
hub_activate() when over-current happens, and then hub_events() will
not check the port status because it thinks nothing changed.
If CONFIG_USB_SUSPEND is disabled, the interrupt pipe of the hub will
report the change and set hub->event_bits, and then hub_events() will
check what events happened.In this case over-current can be detected.

Signed-off-by: Shen Guang <shenguang10@gmail.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Acked-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-01-08 15:01:11 -08:00
..
atm Usb: atm: usbatm: fixed a pointer variable format issue 2013-12-08 18:01:56 -08:00
c67x00 USB: c67x00: move URB private data allocation from under spinlock 2014-01-07 16:15:39 -08:00
chipidea Revert "usb: chipidea: imx: set CI_HDRC_IMX28_WRITE_FIX for imx28" 2014-01-08 13:45:51 -08:00
class Merge 3.13-rc5 into usb-next 2013-12-24 10:18:03 -08:00
core usb:hub set hub->change_bits when over-current happens 2014-01-08 15:01:11 -08:00
dwc3 Merge 3.13-rc5 into usb-next 2013-12-24 10:18:03 -08:00
early USB: ehci-dbgp: drop dead code. 2013-09-26 16:25:21 -07:00
gadget usb: gadget: remove unused variable in gr_queue_int() 2014-01-07 16:30:25 -08:00
host xhci: Set scatter-gather limit to avoid failed block writes. 2014-01-08 11:00:52 -08:00
image USB: regroup all depends on USB within an if USB block 2013-04-09 16:49:07 -07:00
misc USB: misc: idmouse: correct spelling mistake in error string 2014-01-03 12:39:31 -08:00
mon USB: regroup all depends on USB within an if USB block 2013-04-09 16:49:07 -07:00
musb USB: musb: correct spelling mistakes in comment and error string 2014-01-03 12:39:31 -08:00
phy usb: changes for v3.14 merge window 2014-01-03 12:15:10 -08:00
renesas_usbhs usb: changes for v3.14 merge window 2014-01-03 12:15:10 -08:00
serial USB: ftdi_sio: added CS5 quirk for broken smartcard readers 2014-01-07 16:28:43 -08:00
storage USB: Nokia 502 is an unusual device 2014-01-03 12:40:22 -08:00
wusbcore USB: wusbcore: fix up coding style issues in wa-nep.c 2014-01-07 16:19:31 -08:00
Kconfig usb: musb: Rework USB and USB_GADGET dependency 2013-12-23 10:28:56 -06:00
Makefile usb: patches for v3.12 merge window 2013-08-13 15:28:01 -07:00
README
usb-common.c usb: common: introduce of_usb_get_maximum_speed() 2013-07-29 13:56:46 +03:00
usb-skeleton.c USB: usb-skeleton.c: add retry for nonblocking read 2013-07-25 12:01:13 -07:00

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.