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bc46e23c34
Here's the big pull request for the Gadget API. Again the majority of changes sit in dwc2 driver. Most important changes contain a workaround for GOTGCTL being wrong, a sleep-inside-spinlock fix and the big series of cleanups on dwc2. One important thing on dwc3 is that we don't anymore need gadget drivers to cope with unaligned OUT transfers for us. We have support for appending one extra chained TRB to align transfer ourselves. Apart from these, the usual set of typos, non-critical fixes, etc. -----BEGIN PGP SIGNATURE----- iQJRBAABCAA7FiEElLzh7wn96CXwjh2IzL64meEamQYFAliKBd0dHGZlbGlwZS5i YWxiaUBsaW51eC5pbnRlbC5jb20ACgkQzL64meEamQb1Yw//XEI0VeUdsRM/JKK5 4BBoFCCUXT7jZMyzm7x9G7/4Tz3Xn9I9elAbZ7A3ctpLQXVO0KUAc5S3MRmq1ghj 8h18ZrOLqWG6gG+0eOtzSQLJ91+ULV+nyV6jS+RJyio7AMKy6XW0hRHQQs8ggcqg A/hZKVI/GdvnoSSLVNoWFxTiVC7Pu62IsWJV6BJuWubEze7u97xfBIt3qB9h2R8q ARfy29LYZulgrRYZ2DAtrKNFC8yKdIiKxWcmI47FHcNXtnQ6yAu7VqFcKWlH9Jvb NY/YAzv30leOXHrwHVXCM/Urh7SK6FJIIdgoDMpCWoy1CK2pHXkJCndt/NuM721h DYaopfNBJLtjvYDsvtnGXo3DC6+hBd3oYEz+gogGS/5gocr2ChnRK8Qc5T8eXYnC OBIVKeHcsx9wMxYwwxk2axWjflfbSRjPnpZHibgkvdrwGVY+Hcwf5GyixvTdqQJM dMrZcIPqtPJAg7OBPoH0LEViT14+lc8f5n6D0T/NezLxeeZvbcWQ5p17LpNal5oi S+4kmtNWR7nXKSdICvc00Ap+Iqu91eB4c1MfvP6HSLq7wpjs5QhWtDvM7++ygjL1 7m3ExmXUx+j29M64WM9KTNlXZFkQ8XB5PzmcXueQkz9fd2u8JJhBqGHdVWFHOv9y 4YGdaSpeqsui9bFoIdbjn0EO3+g= =gk8j -----END PGP SIGNATURE----- Merge tag 'usb-for-v4.11' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb into usb-next Felipe writes: USB: changes for v4.11 Here's the big pull request for the Gadget API. Again the majority of changes sit in dwc2 driver. Most important changes contain a workaround for GOTGCTL being wrong, a sleep-inside-spinlock fix and the big series of cleanups on dwc2. One important thing on dwc3 is that we don't anymore need gadget drivers to cope with unaligned OUT transfers for us. We have support for appending one extra chained TRB to align transfer ourselves. Apart from these, the usual set of typos, non-critical fixes, etc.
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 ("hub_wq").
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.