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- /*-
- * sunBW2.c --
- * Functions for handling the sun BWTWO board.
- *
- * Copyright (c) 1987 by the Regents of the University of California
- * Copyright (c) 1987 by Adam de Boor, UC Berkeley
- *
- * Permission to use, copy, modify, and distribute this
- * software and its documentation for any purpose and without
- * fee is hereby granted, provided that the above copyright
- * notice appear in all copies. The University of California
- * makes no representations about the suitability of this
- * software for any purpose. It is provided "as is" without
- * express or implied warranty.
- *
- *
- */
-
- /************************************************************
- Copyright 1987 by Sun Microsystems, Inc. Mountain View, CA.
-
- All Rights Reserved
-
- Permission to use, copy, modify, and distribute this
- software and its documentation for any purpose and without
- fee is hereby granted, provided that the above copyright no-
- tice appear in all copies and that both that copyright no-
- tice and this permission notice appear in supporting docu-
- mentation, and that the names of Sun or MIT not be used in
- advertising or publicity pertaining to distribution of the
- software without specific prior written permission. Sun and
- M.I.T. make no representations about the suitability of this
- software for any purpose. It is provided "as is" without any
- express or implied warranty.
-
- SUN DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
- INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FIT-
- NESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL SUN BE LI-
- ABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
- ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
- PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
- OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH
- THE USE OR PERFORMANCE OF THIS SOFTWARE.
-
- ********************************************************/
-
-
- #ifndef lint
- static char sccsid[] = "%W %G Copyright 1987 Sun Micro";
- #endif
-
- /*-
- * Copyright (c) 1987 by Sun Microsystems, Inc.
- */
-
- #include "sun.h"
- #include "resource.h"
-
- #include <sys/mman.h>
- #include <sundev/bw2reg.h>
-
- extern caddr_t mmap();
-
- typedef struct bw2 {
- u_char image[BW2_FBSIZE]; /* Pixel buffer */
- } BW2, BW2Rec, *BW2Ptr;
-
- typedef struct bw2hr {
- u_char image[BW2_FBSIZE_HIRES]; /* Pixel buffer */
- } BW2HR, BW2HRRec, *BW2HRPtr;
-
- /*-
- *-----------------------------------------------------------------------
- * sunBW2Init --
- * Attempt to find and initialize a bw2 framebuffer
- *
- * Results:
- * None
- *
- * Side Effects:
- * Most of the elements of the ScreenRec are filled in. The
- * video is enabled for the frame buffer...
- *
- *-----------------------------------------------------------------------
- */
- /*ARGSUSED*/
- static Bool
- sunBW2Init (index, pScreen, argc, argv)
- int index; /* The index of pScreen in the ScreenInfo */
- ScreenPtr pScreen; /* The Screen to initialize */
- int argc; /* The number of the Server's arguments. */
- char **argv; /* The arguments themselves. Don't change! */
- {
- if (!mfbScreenInit(pScreen,
- sunFbs[index].fb,
- sunFbs[index].info.fb_width,
- sunFbs[index].info.fb_height,
- monitorResolution, monitorResolution,
- sunFbs[index].info.fb_width))
- return (FALSE);
-
- if (!sunScreenAllocate (pScreen) || !sunScreenInit (pScreen))
- return FALSE;
-
- pScreen->whitePixel = 0;
- pScreen->blackPixel = 1;
-
- /*
- * Enable video output...?
- */
- (void) sunSaveScreen(pScreen, SCREEN_SAVER_OFF);
-
- return mfbCreateDefColormap(pScreen);
- }
-
- /*-
- *-----------------------------------------------------------------------
- * sunBW2Probe --
- * Attempt to find and initialize a bw2 framebuffer
- *
- * Results:
- * None
- *
- * Side Effects:
- * Memory is allocated for the frame buffer and the buffer is mapped.
- *
- *-----------------------------------------------------------------------
- */
-
- /*ARGSUSED*/
- Bool
- sunBW2Probe(pScreenInfo, index, fbNum, argc, argv)
- ScreenInfo *pScreenInfo; /* The screenInfo struct */
- int index; /* The index of pScreen in the ScreenInfo */
- int fbNum; /* Index into the sunFbData array */
- int argc; /* The number of the Server's arguments. */
- char **argv; /* The arguments themselves. Don't change! */
- {
- int fd;
- struct fbtype fbType;
- int pagemask, mapsize;
- caddr_t addr, mapaddr;
-
- if ((fd = sunOpenFrameBuffer(FBTYPE_SUN2BW, &fbType, index, fbNum,
- argc, argv)) < 0)
- return FALSE;
-
- /*
- * It's not precisely clear that we have to round up
- * fb_size to the nearest page boundary but there are
- * rumors that this is a good idea and that it shouldn't
- * hurt anything.
- */
- pagemask = getpagesize() - 1;
- mapsize = (fbType.fb_size + pagemask) & ~pagemask;
- addr = 0;
-
- #ifndef _MAP_NEW
- /*
- * If we are running pre-SunOS 4.0 then we first need to
- * allocate some address range for mmap() to replace.
- */
- if ((addr = (caddr_t) valloc(mapsize)) == 0) {
- ErrorF("Could not allocate room for frame buffer.\n");
- (void) close(fd);
- return FALSE;
- }
- #endif _MAP_NEW
-
- /*
- * In SunOS 4.0 the standard C library mmap() system call
- * wrapper will automatically add a _MAP_NEW flag for us.
- * In pre-4.0 mmap(), success returned 0 but now it returns the
- * newly mapped starting address. The test for mapaddr
- * being 0 below will handle this difference correctly.
- */
- if ((mapaddr = (caddr_t) mmap(addr, mapsize,
- PROT_READ | PROT_WRITE, MAP_SHARED, fd, (off_t)0)) == (caddr_t) -1) {
- Error("mapping BW2");
- (void) close(fd);
- return FALSE;
- }
-
- if (mapaddr == 0)
- mapaddr = addr;
-
- sunFbs[index].fb = (pointer)mapaddr;
- sunFbs[index].fd = fd;
- sunFbs[index].info = fbType;
- sunFbs[index].EnterLeave = NULL;
- return TRUE;
- }
-
- Bool
- sunBW2Create(pScreenInfo, argc, argv)
- ScreenInfo *pScreenInfo;
- int argc;
- char **argv;
- {
- return (AddScreen(sunBW2Init, argc, argv) >= 0);
- }
-