minix/servers/input/input.h
David van Moolenbroek 6b3f4dc157 Input infrastructure, INPUT server, PCKBD driver
This commit separates the low-level keyboard driver from TTY, putting
it in a separate driver (PCKBD). The commit also separates management
of raw input devices from TTY, and puts it in a separate server
(INPUT). All keyboard and mouse input from hardware is sent by drivers
to the INPUT server, which either sends it to a process that has
opened a raw input device, or otherwise forwards it to TTY for
standard processing.

Design by Dirk Vogt. Prototype by Uli Kastlunger.

Additional changes made to the prototype:

- the event communication is now based on USB HID codes; all input
  drivers have to use USB codes to describe events;
- all TTY keymaps have been converted to USB format, with the effect
  that a single keymap covers all keys; there is no (static) escaped
  keymap anymore;
- further keymap tweaks now allow remapping of literally all keys;
- input device renumbering and protocol rewrite;
- INPUT server rewrite, with added support for cancel and select;
- PCKBD reimplementation, including PC/AT-to-USB translation;
- support for manipulating keyboard LEDs has been added;
- keyboard and mouse multiplexer devices have been added to INPUT,
  primarily so that an X server need only open two devices;
- a new "libinputdriver" library abstracts away protocol details from
  input drivers, and should be used by all future input drivers;
- both INPUT and PCKBD can be restarted;
- TTY is now scheduled by KERNEL, so that it won't be punished for
  running a lot; without this, simply running "yes" on the console
  kills the system;
- the KIOCBELL IOCTL has been moved to /dev/console;
- support for the SCANCODES termios setting has been removed;
- obsolete keymap compression has been removed;
- the obsolete Olivetti M24 keymap has been removed.

Change-Id: I3a672fb8c4fd566734e4b46d3994b4b7fc96d578
2014-03-01 09:04:55 +01:00

45 lines
1.4 KiB
C

#ifndef _SERVERS_INPUT_H
#define _SERVERS_INPUT_H
#include <minix/input.h>
/* Configuration. */
#define EVENTBUF_SIZE 32
#define KBDMUX_MINOR 0
#define KBD0_MINOR 1
#define KBD_MINORS 4
#define MOUSEMUX_MINOR 64
#define MOUSE0_MINOR 65
#define MOUSE_MINORS 4
/* Constants. */
#define KBDMUX_DEV 0
#define FIRST_KBD_DEV 1
#define LAST_KBD_DEV (FIRST_KBD_DEV + KBD_MINORS - 1)
#define MOUSEMUX_DEV (LAST_KBD_DEV + 1)
#define FIRST_MOUSE_DEV (MOUSEMUX_DEV + 1)
#define LAST_MOUSE_DEV (FIRST_MOUSE_DEV + MOUSE_MINORS - 1)
#define INPUT_DEV_MAX (1 + KBD_MINORS + 1 + MOUSE_MINORS)
/* Input device state structure. */
struct input_dev {
devminor_t minor; /* minor number of this device */
endpoint_t owner; /* owning driver endpoint, or NONE */
char label[DS_MAX_KEYLEN]; /* label of owning driver */
struct input_event eventbuf[EVENTBUF_SIZE]; /* event ring buffer */
unsigned int tail; /* tail into ring buffer */
unsigned int count; /* number of elements in ring buffer */
int opened; /* has a process opened the device? */
int suspended; /* is a process suspended on a read? */
endpoint_t caller; /* endpoint for suspended read */
cp_grant_id_t grant; /* grant for suspended read */
cdev_id_t req_id; /* request ID for suspended read */
endpoint_t selector; /* read-selecting endpoint, or NONE */
unsigned int leds; /* LED mask - saved across connects */
};
#endif /* !_SERVERS_INPUT_H */