forked from luck/tmp_suning_uos_patched
f3f3253d64
This patch associates hub suspend and resume logic (including for root hubs)
with CONFIG_PM -- instead of CONFIG_USB_SUSPEND as before -- thereby unifying
two troublesome versions of suspend logic into just one. It'll be easier to
keep things right from now on.
- Now usbcore _always_ calls hcd->hub_suspend as needed, instead of
only when USB_SUSPEND is enabled:
* Those root hub methods are now called from hub suspend/resume;
no more skipping between layers during device suspend/resume;
* It now handles cases allowed by sysfs or autosuspended root hubs,
by forcing the hub interface to resume too.
- All devices, including virtual root hubs, now get the same treatment
on their resume paths ... including re-activating all their interfaces.
Plus it gets rid of those stub copies of usb_{suspend,resume}_device(), and
updates the Kconfig to match the new definition of USB_SUSPEND: it provides
(a) selective suspend, downstream from hubs; and (b) remote wakeup, upstream
from any device configuration which supports it.
This calls for minor followup patches for most HCDs (and their PCI glue).
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
drivers/usb/core/Kconfig | 11 ++-
drivers/usb/core/hub.c | 163 +++++++++++++++++++++++++----------------------
2 files changed, 97 insertions(+), 77 deletions(-)
103 lines
3.4 KiB
Plaintext
103 lines
3.4 KiB
Plaintext
#
|
|
# USB Core configuration
|
|
#
|
|
config USB_DEBUG
|
|
bool "USB verbose debug messages"
|
|
depends on USB
|
|
help
|
|
Say Y here if you want the USB core & hub drivers to produce a bunch
|
|
of debug messages to the system log. Select this if you are having a
|
|
problem with USB support and want to see more of what is going on.
|
|
|
|
comment "Miscellaneous USB options"
|
|
depends on USB
|
|
|
|
config USB_DEVICEFS
|
|
bool "USB device filesystem"
|
|
depends on USB
|
|
---help---
|
|
If you say Y here (and to "/proc file system support" in the "File
|
|
systems" section, above), you will get a file /proc/bus/usb/devices
|
|
which lists the devices currently connected to your USB bus or
|
|
busses, and for every connected device a file named
|
|
"/proc/bus/usb/xxx/yyy", where xxx is the bus number and yyy the
|
|
device number; the latter files can be used by user space programs
|
|
to talk directly to the device. These files are "virtual", meaning
|
|
they are generated on the fly and not stored on the hard drive.
|
|
|
|
You may need to mount the usbfs file system to see the files, use
|
|
mount -t usbfs none /proc/bus/usb
|
|
|
|
For the format of the various /proc/bus/usb/ files, please read
|
|
<file:Documentation/usb/proc_usb_info.txt>.
|
|
|
|
Please note that this code is completely unrelated to devfs, the
|
|
"/dev file system support".
|
|
|
|
Most users want to say Y here.
|
|
|
|
config USB_BANDWIDTH
|
|
bool "Enforce USB bandwidth allocation (EXPERIMENTAL)"
|
|
depends on USB && EXPERIMENTAL
|
|
help
|
|
If you say Y here, the USB subsystem enforces USB bandwidth
|
|
allocation and will prevent some device opens from succeeding
|
|
if they would cause USB bandwidth usage to go above 90% of
|
|
the bus bandwidth.
|
|
|
|
If you say N here, these conditions will cause warning messages
|
|
about USB bandwidth usage to be logged and some devices or
|
|
drivers may not work correctly.
|
|
|
|
config USB_DYNAMIC_MINORS
|
|
bool "Dynamic USB minor allocation (EXPERIMENTAL)"
|
|
depends on USB && EXPERIMENTAL
|
|
help
|
|
If you say Y here, the USB subsystem will use dynamic minor
|
|
allocation for any device that uses the USB major number.
|
|
This means that you can have more than 16 of a single type
|
|
of device (like USB printers).
|
|
|
|
If you are unsure about this, say N here.
|
|
|
|
config USB_SUSPEND
|
|
bool "USB selective suspend/resume and wakeup (EXPERIMENTAL)"
|
|
depends on USB && PM && EXPERIMENTAL
|
|
help
|
|
If you say Y here, you can use driver calls or the sysfs
|
|
"power/state" file to suspend or resume individual USB
|
|
peripherals.
|
|
|
|
Also, USB "remote wakeup" signaling is supported, whereby some
|
|
USB devices (like keyboards and network adapters) can wake up
|
|
their parent hub. That wakeup cascades up the USB tree, and
|
|
could wake the system from states like suspend-to-RAM.
|
|
|
|
If you are unsure about this, say N here.
|
|
|
|
|
|
config USB_OTG
|
|
bool
|
|
depends on USB && EXPERIMENTAL
|
|
select USB_SUSPEND
|
|
default n
|
|
|
|
|
|
config USB_OTG_WHITELIST
|
|
bool "Rely on OTG Targeted Peripherals List"
|
|
depends on USB_OTG
|
|
default y
|
|
help
|
|
If you say Y here, the "otg_whitelist.h" file will be used as a
|
|
product whitelist, so USB peripherals not listed there will be
|
|
rejected during enumeration. This behavior is required by the
|
|
USB OTG specification for all devices not on your product's
|
|
"Targeted Peripherals List".
|
|
|
|
Otherwise, peripherals not listed there will only generate a
|
|
warning and enumeration will continue. That's more like what
|
|
normal Linux-USB hosts do (other than the warning), and is
|
|
convenient for many stages of product development.
|
|
|
|
|