wsmouse(9) - NetBSD Manual Pages

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WSMOUSE(9)             NetBSD Kernel Developer's Manual             WSMOUSE(9)


NAME

     wsmouse, wsmouse_input, wsmousedevprint - wscons mouse support


SYNOPSIS

     #include <dev/wscons/wsconsio.h>
     #include <dev/wscons/wsmousevar.h>

     void
     wsmouse_input(struct device *msdev, u_int btns, int x, int y, int z,
             u_int flags);

     int
     wsmousedevprint(void *aux, const char *pnp);


DESCRIPTION

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


DATA TYPES

     Mouse drivers providing support for wscons pointer devices will make use
     of the following data types:

     struct wsmouse_accessops
              A structure used to specify the mouse access functions.  All
              pointer devices must provide this structure and pass it to the
              wsmouse(4) child device.  It has the following members:

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

              The enable member defines the function to be called to enable
              monitoring pointer movements and passing these events to wscons.
              The disable member defines the function to disable movement
              events.  The ioctl member defines the function to be called to
              perform mouse-specific ioctl calls.

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

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

                      const struct wsmouse_accessops *accessops;
                      void *accesscookie;


FUNCTIONS

     wsmouse_input(msdev, btns, x, y, z, flags)
              Callback from the mouse driver to the wsmouse interface driver.
              The argument btns specifies the current button configuration.
              The pointer coordinate is specified by the x, y, z tuple.  The
              flags argument specify whether the pointer device and the mea-
              surement is in relative or absolute mode.  Valid values for
              flags are:

              WSMOUSE_INPUT_DELTA
                       Relative mode.

              WSMOUSE_INPUT_ABSOLUTE_X
                       Absolute mode in x-direction.

              WSMOUSE_INPUT_ABSOLUTE_Y
                       Absolute mode in y-direction.

              WSMOUSE_INPUT_ABSOLUTE_Z
                       Absolute mode in z-direction.

     wsmousedevprint(aux, pnp)
              The default wsmouse printing routine used by config_found().
              (see autoconf(9)).


AUTOCONFIGURATION

     Mouse drivers which want to use the wsmouse module must be a parent to
     the wsmouse(4) device and provide an attachment interface.  To attach the
     wsmouse(4) device, the mouse driver must allocate and populate a
     wsmouse_attach_args structure with the supported operations and callbacks
     and call config_found() to perform the attach (see autoconf(9)).


OPERATION

     When a mouse-movement event is received, the device driver must perform
     any necessary movement decoding to wscons events and pass the events to
     wscons via wsmouse_input().

     The wscons framework calls back into the hardware driver by invoking the
     functions that are specified in the accessops structure.  The enable()
     and disable() functions are relatively simple and self-explanatory.  The
     ioctl() function is called by the wscons interface to perform mouse-spe-
     cific 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

     This section describes places within the NetBSD source tree where actual
     code implementing or using 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 wsmouse module itself is implement within the file
     sys/dev/wscons/wsmouse.c.  ioctl(2) operations are listed in
     sys/dev/wscons/wsconsio.h.


SEE ALSO

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

NetBSD 2.0                      October 7, 2001                     NetBSD 2.0