mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/
synced 2026-10-24 19:10:26 +00:00
No description
- C 96.8%
- Assembly 0.9%
- Rust 0.7%
- Shell 0.6%
- Python 0.5%
- Other 0.3%
889b2ae913
There is an approach made to implement gs_usb firmware/driver based on
Zephyr RTOS. It was found that USB stack of Zephyr RTOS overwrites USB
EP addresses, if they have different last 4 bytes in absence of other
endpoints.
For example in case of gs_usb candlelight firmware EP-IN is 0x81 and
EP-OUT 0x02. If there are no additional USB endpoints, Zephyr RTOS will
overwrite EP-OUT to 0x01. More information can be found in the
discussion with Zephyr RTOS USB stack maintainer here:
https://github.com/zephyrproject-rtos/zephyr/issues/67812
There are already two different gs_usb FW driver implementations based
on Zephyr RTOS:
1. https://github.com/CANnectivity/cannectivity
(by: https://github.com/henrikbrixandersen)
2. https://github.com/zephyrproject-rtos/zephyr/compare/main...KozhinovAlexander:zephyr:gs_usb
(by: https://github.com/KozhinovAlexander)
At the moment both Zephyr RTOS implementations use dummy USB endpoint,
to overcome described USB stack behavior from Zephyr itself. Since
Zephyr RTOS is intended to be used on microcontrollers with very
constrained amount of resources (ROM, RAM) and additional endpoint
requires memory, it is more convenient to update the gs_usb driver in
the Linux kernel.
To fix this problem, update the gs_usb driver from using hard coded
endpoint numbers to evaluate the endpoint descriptors and use the
endpoints provided there.
Fixes:
|
History
|
|
|---|---|---|
| arch | ||
| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| io_uring | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| rust | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .editorconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| .rustfmt.toml | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.