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NAME    [Toc]    [Back]

     wskbd, wskbd_input, wskbd_rawinput, wskbd_cnattach, wskbd_cndetach,
     wskbddevprint - wscons keyboard support

SYNOPSIS    [Toc]    [Back]

     #include <dev/wscons/wsconsio.h>
     #include <dev/wscons/wskbdvar.h>
     #include <dev/wscons/wsksymdef.h>
     #include <dev/wscons/wsksymvar.h>

     wskbd_input(struct device *kbddev, u_int type, int value);

     wskbd_rawinput(struct device *kbddev, u_char *buf, int len);

     wskbd_cnattach(const struct wskbd_consops *consops, void *conscookie,
             const struct wskbd_mapdata *mapdata);


     wskbddevprint(void *aux, const char *pnp);

DESCRIPTION    [Toc]    [Back]

     The wskbd module is a component of the wscons(9) framework to provide
     machine-indpendent keyboard support.  Most of the support is provided by
     the wskbd(4) device driver, which must be a child of the hardware device

DATA TYPES    [Toc]    [Back]

     Keyboard drivers providing support for wscons keyboards will make use of
     the following data types:

     kbd_t    An opaque type describing keyboard properties.

              The wscons keyboard-independent symbolic representation of the

     struct wskbd_accessops
              A structure used to specify the keyboard access functions.  All
              keyboards must provide this structure and pass it to the
              wskbd(4) child device.  It has the following members:

                      int     (*enable)(void *, int);
                      void    (*set_leds)(void *, int);
                      int     (*ioctl)(void *v, u_long cmd, caddr_t data,
                                      int flag, struct proc *p);

              The enable member defines the function to be called to enable
              keypress passing to wscons.  The set_leds member defined the
              function to be called to set the LEDs on the keyboard.  The
              ioctl member defines the function to be called to perform keyboard-specific
 ioctl calls.

              There is a void * cookie provided by the keyboard driver associated
 with these functions, which is passed to them when they are

     struct wskbd_consops
              A structure used to specify the keyboard console operations.
              All keyboards which can operate as a console must provide this
              structure and pass it to the wskbd(4) child device.  If the keyboard
 cannot be a console, it is not necessary to specify this
              structure.  It has the following members:

                      void    (*getc)(void *, u_int *, int *);
                      void    (*pollc)(void *, int);
                      void    (*bell)(void *, u_int, u_int, u_int);

              There is a void * cookie provided by the keyboard driver associated
 with these functions, which is passed to them when they are

     struct wscons_keydesc
              A structure used to describe a keyboard mapping table to convert
              keyboard-specific keycodes to wscons keysyms.  It has the following

                      kbd_t   name;           /* name of this map */
                      kbd_t   base;           /* map this one is based on */
                      int     map_size;       /* size of map */
                      const   keysym_t *map;  /* the map itself */

     struct wskbd_mapdata
              A structure used to describe the keyboard layout and operation
              to interpret the keyboard layout.  it contains the following

                      const struct wscons_keydesc *keydesc;
                      kbd_t layout;

     struct wskbd_attach_args
              A structure used to attach the wskbd(4) child device.  It has
              the following members:

                      int console;
                      const struct wskbd_mapdata *keymap;
                      const struct wskbd_accessops *accessops;
                      void *accesscookie;

   Keymaps    [Toc]    [Back]
     Keymaps are a dense stream of keysym_t.  A declaration has the following

     pos [cmd] normal [shift] [altgr] [shift-altgr]

     The fields have the following meanings:

           pos          Always specified as KC(pos) and starts the description
                        of key pos.
           cmd          If the command modifier (KS_Cmd_XXX) is active, the
                        optional command cmd is invoked.
           normal       The keysym if no modifiers are active.
           shift        The keysym if the shift modifier is active.
           altgr        The keysym if the alt-gr modifier is active.
           shift-altgr  The keysym if the shift-alt-gr modifier is active.

     If the keysym after pos is not KS_Cmd_XXX, then cmd is empty.  The shift,
     altgr and shift-altgr fields are determined from previous fields if they
     are not specified.  Therefore, there are four valid keysym declarations:

     pos [cmd] normal

     pos [cmd] normal shift

     pos [cmd] normal shift altgr

     pos [cmd] normal shift altgr shift-altgr

FUNCTIONS    [Toc]    [Back]

     wskbd_input(kbddev, type, value)
              Pass the keypress of value value and type type to wscons keyboard
 driver.  Valid values of type are:

                       Key released.

                       Key pressed.

     wskbd_rawinput(kbddev, buf, len)
              Pass the raw keypress in the buffer buf to the wscons keyboard
              driver.  The buffer is len bytes long.  This function should
              only be called if the kernel option WSDISPLAY_COMPAT_RAWKBD is

     wskbd_cnattach(consops, conscookie, mapdata)
              Attach this keyboard as the console input by specifying the console
 operations consops and the keyboard mapping table information
 in mapdata.  The functions specified in consops will be
              called with conscookie as the first argument.

              Detach this keyboard as the console input.

     wskbddevprint(aux, pnp)
              The default wskbd printing routine used by config_found().  (see


     Keyboard drivers which want to utilise the wskbd module must be a parent
     to the wskbd(4) device and provide an attachment interface.  To attach
     the wskbd(4) device, the keyboard driver must allocate and populate a
     wskbd_attach_args structure with the supported operations and callbacks
     and call config_found() to perform the attach (see autoconf(9)).  The
     keymap member points to the wskbd_mapdata structure which describes the
     keycode mapping operations.  The accessops member points to the
     wskbd_accessops structure which describes the keyboard access operations.
     The console member is a boolean to indicate to wscons whether this keyboard
 will be used for console input.

OPERATION    [Toc]    [Back]

     If the keyboard belongs to the system console, it must register the
     wskbd_consops structure specifying the console operations via
     wskbd_cnattach() at console attach time.

     When a keypress arrives from the keyboard, the keyboard driver must perform
 any necessary character decoding to wscons events and pass the
     events to wscons via wskbd_input().  If the kernel is compiled with the
     option WSDISPLAY_COMPAT_RAWKBD, then the keyboard driver must also pass
     the raw keyboard data to wscons via wskbd_rawinput().

     The wscons framework calls back into the hardware driver by invoking the
     functions that are specified in the accessops structure.  The enable()
     and set_leds() functions are relatively simple and self-explanatory.  The
     ioctl() function is called by the wscons interface to perform keyboardspecific
 ioctl operations (see ioctl(2)).  The argument cmd to the
     ioctl() function specifies the specific command to perform using the data
     data.  Valid commands are listed in sys/dev/wscons/wsconsio.h.

CODE REFERENCES    [Toc]    [Back]

     This section describes places within the NetBSD source tree where actual
     code implementing or utilising the machine-independent wscons subsystem
     can be found.  All pathnames are relative to /usr/src.

     The wscons subsystem is implemented within the directory sys/dev/wscons.
     The wskbd module itself is implement within the files
     sys/dev/wscons/wskbd.c and sys/dev/wscons/wskbdutil.c.  ioctl(2) operations
 are listed in sys/dev/wscons/wsconsio.h.

SEE ALSO    [Toc]    [Back]

     ioctl(2), autoconf(9), driver(9), intro(9), wsdisplay(9), wsmouse(9)

BSD                             October 7, 2001                            BSD
[ Back ]
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