We deprecate direct I/O support in favor of ppdev for the following
reasons:
- Linux supports ppdev since ~2.4 (released ~24 years ago) and it is
enabled by default on major distros (Ubuntu, Fedora). So it is
effectively ubiquitous
- FreeBSD provides no direct I/O support, so ppdev (ppi) is the only
viable option
- Direct I/O requires root/elevated privileges which is inadvisable
- Removing direct I/O reduces build and driver complexity and yields
a smaller, easier-to-maintain codebase
- Supporting only ppdev allows us to simplify the codebase by using
device files (e.g., /dev/parport0) instead of numeric identifiers
Windows is the only rationale to keep direct I/O, but the user base
appears minimal to nonexistent and no active contributors can test the
Windows driver.
Change-Id: Ia6d5ed6e8c5faa2a9b4919ca97c5cf9033372a64
Signed-off-by: Marc Schink <dev@zapb.de>
Reviewed-on: https://review.openocd.org/c/openocd/+/9151
Reviewed-by: Antonio Borneo <borneo.antonio@gmail.com>
Tested-by: jenkins
39ed0b0bba