Implement USB kernel driver detach from userland.

Submitted by: Hans Petter Selasky

Improve u3g device ejecting by providing additional methods for the eject
command in the usb_msctest routines, as well as a general tidyup.

This now properly ejects the ZTE MF636, Option Gi0322 and

Improve u3g device ejecting by providing additional methods for the eject
command in the usb_msctest routines, as well as a general tidyup.

This now properly ejects the ZTE MF636, Option Gi0322 and Novatel MC950D
devices I have on my desk.

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scratch_size was incorrectly passed as language ID when retrieving the language
ID table, this broke string retrieval on some devices.

Submitted by: Hans Petter Selasky
Reported by: Renato Botelho

Merge from head at r201628.

# This hasn't been tested, and there are at least three bad commits
# that need to be backed out before the branch will be stable again.

Use the EVENTHANDLER system to hook into the usb device configuration and
perform a function such as ejecting a 3G autoinstaller disk. The eventhandler
system properly tracks threads and is safe to u

Use the EVENTHANDLER system to hook into the usb device configuration and
perform a function such as ejecting a 3G autoinstaller disk. The eventhandler
system properly tracks threads and is safe to unload, remove the
setting/clearing of a function pointer in the kernel by u3g(4) which included a
tsleep for safety.

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Remove overuse of exclamation marks in kernel printfs, there mere fact a
message has been printed is enough to get someones attention. Also remove the
line number for DPRINTF/DPRINTFN, it already pri

Remove overuse of exclamation marks in kernel printfs, there mere fact a
message has been printed is enough to get someones attention. Also remove the
line number for DPRINTF/DPRINTFN, it already prints the funtion name and a
unique message.

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Improve High Speed slot allocation mechanism by moving the computation to the
endpoint rather than per xfer and provide functions around get/free of resources.

Submitted by: Hans Petter Selasky

- MFC

Correct buffer sizes used so that they match. The old code could give the
impression that a overflow situation existed but was not possible.

Reported by: kib
Submitted by: Hans Petter Selasky

Add support for USB language selection.

PR: usb/138563
Reported by: Bruce Cran
Submitted by: Hans Petter Selasky

Fix NULL-pointer dereference in usb_endpoint_foreach().

PR: usb/138389
Submitted by: Patroklos Argyroudis at census, inc

MFp4 @ 168387

- clean up USB detach logic. There seems to be some problems detaching multiple
USB HUBs connected in series from the root.

- after this patch the rule is:
1) Always use device_de

MFp4 @ 168387

- clean up USB detach logic. There seems to be some problems detaching multiple
USB HUBs connected in series from the root.

- after this patch the rule is:
1) Always use device_detach() on the USB HUB first.
2) Never just device_delete_child() on the USB HUB, because that function
will traverse to all the device leaves and free them first, and then the USB
stack will free the devices twice which doesn't work very well.

- make sure the did DMA delay gets set after the timeout has elapsed to make
logic more clear. There is no functional difference.

Submitted by: Hans Petter Selasky

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- MFC from head@196987

- Patch to allow USB controller to resume operation after
being polled.

- Remove the need for Giant from the USB HUB driver.

- Leave device unconfigured instead of disabl

- Patch to allow USB controller to resume operation after
being polled.

- Remove the need for Giant from the USB HUB driver.

- Leave device unconfigured instead of disabling the USB port
when Huawei Autoinstall disk detection triggers. This should
fix problems that the Huawei device is not detected after
Autoinstall eject is issued.
- Reported by: Nikolay Antsiferov

- Fix memory use after free race for USB character devices.
- Reported by: Lucius Windschuh

- Factor out the enumeration lock into three functions to make the
coming newbus lock conversion more easy.
- usbd_enum_lock
- usbd_enum_unlock
- usbd_enum_is_locked

Submitted by: hps

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- MFC @196061

USB core:
- add support for defragging of written device data.
- improve handling of alternate settings in device side mode.
- correct return value from usbd_get_no_alts() function.
- reported by: HP

USB core:
- add support for defragging of written device data.
- improve handling of alternate settings in device side mode.
- correct return value from usbd_get_no_alts() function.
- reported by: HPS
- P4 ID: 166156, 166168

- report USB device release information to devd and pnpinfo.
- reported by: MIHIRA Sanpei Yoshiro
- P4 ID: 166221

Submitted by: hps
Approved by: re

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- MFC

Sync to p4

- Add support for devices that handle set and clear stall in hardware.
- Add missing get timestamp function
- Add more xfer flags

Submitted by: Hans Petter Selasky
Approved by: re (ki

Sync to p4

- Add support for devices that handle set and clear stall in hardware.
- Add missing get timestamp function
- Add more xfer flags

Submitted by: Hans Petter Selasky
Approved by: re (kib)

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- Make struct usb_xfer opaque so that drivers can not access the internals
- Reduce the number of headers needed for a usb driver, the common case is just usb.h and usbdi.h

Fix usb2_find_descriptor function name.

s/usb2_/usb_|usbd_/ on all function names for the USB stack.

Remove usb2_cv_* and just use the kernel condvar implementation, it was needed
earlier since condition variables didnt work with Giant but this was fixed 10
months ago.

- Merge from HEAD

Rename usb pipes to endpoints as it better represents what they are, and struct
usb_pipe may be used for a different purpose later on.

s/usb2_/usb_/ on all typedefs for the USB stack.