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Jorge Guzman
f0a870baab
The driver kept a character device, a ring buffer, a poll waiter list and an encoder of its own, in parallel with everything the keyboard upper half already provides. A USB keyboard was therefore the one keyboard an application could not read like any other. Register with keyboard_register() and report with keyboard_event(), which removes the private character device and the four hundred lines that served it. Special keys are reported with the SPEC event types carrying a keycode, so an application no longer has to guess whether a value in the character range is a character or an arrow key. HIDKBD_ENCODED and HIDKBD_NODEBOUNCE go away with the code they guarded. Encoding is now inherent to the event, and the previous report is no longer an optimisation: a HID keyboard reports the keys that are down rather than the transitions, so it is what tells a new press from a key still held, and what tells that a key has been released. Reporting the modifiers as keys is new, so it is behind HIDKBD_REPORT_MODIFIERS and off by default. Signed-off-by: Jorge Guzman <jorge.gzm@gmail.com>