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,
         int w, 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, void *data,
                                      int flag, struct lwp *l);
                      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 wsmousedev_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, w, flags)
              Callback from the mouse driver to the wsmouse interface driver.
              Arguments are as follows:
              msdev  This is the struct device pointer passed from
                     config_found() on attaching the child wsmouse(4) to spec-
                     ify the mouse device.
              btns   This specifies the current button status.  Bits for
                     pressed buttons (which will cause the
                     WSCONS_EVENT_MOUSE_DOWN event on wsmouse(4) device)
                     should be set, and bits for released buttons (which will
                     cause the WSCONS_EVENT_MOUSE_UP event) should be zero.
                     The left most button state should be in LSB, i.e. for
                     typical three button mouse, the left button is 0x01, the
                     middle button is 0x02, and the right button is 0x04.
              x      Absolute or relative X-axis value to specify the pointer
                     coordinate.  Rightward (moving the mouse right) is posi-
                     tive.
              y      Absolute or relative Y-axis value to specify the pointer
                     coordinate.  Upward (moving the mouse forward) is posi-
                     tive.  Note that this aspect is opposite from the one
                     used in the X server dix layer.
              z      Absolute or relative Z-axis value to specify the pointer
                     coordinate.  Usually this axis is used for the wheel.
                     Downward (turning the wheel backward) is positive.
              w      Absolute or relative W-axis value to specify the pointer
                     coordinate.  Usually this axis would be used for the hor-
                     izontal component of the wheel.
              flags  This argument specifies whether the pointer device and
                     the measurement of the x, y, z, and w axes is in relative
                     or absolute mode.  Valid values for flags are:

                     WSMOUSE_INPUT_DELTA
                              Relative mode.

                     WSMOUSE_INPUT_ABSOLUTE_X
                              Absolute mode in x axis.

                     WSMOUSE_INPUT_ABSOLUTE_Y
                              Absolute mode in y axis.

                     WSMOUSE_INPUT_ABSOLUTE_Z
                              Absolute mode in z axis.

                     WSMOUSE_INPUT_ABSOLUTE_W
                              Absolute mode in w axis.

     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
     wsmousedev_attach_args structure with the supported operations and call-
     backs 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
     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), pms(4), wscons(4), wsmouse(4), autoconf(9), driver(9),
     intro(9), wscons(9), wsdisplay(9), wskbd(9)

NetBSD 7.0                     November 12, 2006                    NetBSD 7.0

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