Initial revision

1 files changed, 1122 insertions, 0 deletions

diff --git a/src/ffb_driver.c b/src/ffb_driver.c
new file mode 100644
index 0000000..8921955
--- /dev/null
+++ b/src/ffb_driver.c
@@ -0,0 +1,1122 @@
+/*
+ * Creator, Creator3D and Elite3D framebuffer driver.
+ *
+ * Copyright (C) 2000 Jakub Jelinek (jakub@redhat.com)
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * JAKUB JELINEK BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+/* $XFree86: xc/programs/Xserver/hw/xfree86/drivers/sunffb/ffb_driver.c,v 1.11 2002/12/06 02:44:04 tsi Exp $ */
+
+#include "xf86.h"
+#include "xf86_OSproc.h"
+#include "xf86_ansic.h"
+#include "xf86Version.h"
+#include "mipointer.h"
+#include "mibstore.h"
+#include "micmap.h"
+
+#define PSZ 8
+#include "cfb.h"
+#undef PSZ
+#include "cfb32.h"
+#include "cfb8_32wid.h"
+
+#include "xf86cmap.h"
+
+#include "ffb.h"
+
+static const OptionInfoRec * FFBAvailableOptions(int chipid, int busid);
+static void	FFBIdentify(int flags);
+static Bool	FFBProbe(DriverPtr drv, int flags);
+static Bool	FFBPreInit(ScrnInfoPtr pScrn, int flags);
+static Bool	FFBScreenInit(int Index, ScreenPtr pScreen, int argc,
+			      char **argv);
+static Bool	FFBEnterVT(int scrnIndex, int flags);
+static void	FFBLeaveVT(int scrnIndex, int flags);
+static Bool	FFBCloseScreen(int scrnIndex, ScreenPtr pScreen);
+static Bool	FFBSaveScreen(ScreenPtr pScreen, int mode);
+
+/* Required if the driver supports mode switching */
+static Bool	FFBSwitchMode(int scrnIndex, DisplayModePtr mode, int flags);
+/* Required if the driver supports moving the viewport */
+static void	FFBAdjustFrame(int scrnIndex, int x, int y, int flags);
+
+/* Optional functions */
+static void	FFBFreeScreen(int scrnIndex, int flags);
+static int	FFBValidMode(int scrnIndex, DisplayModePtr mode, Bool verbose,
+			     int flags);
+static void     FFBDPMSMode(ScrnInfoPtr pScrn, int DPMSMode, int flags);
+/* ffb_dga.c */
+extern void FFB_InitDGA(ScreenPtr pScreen);
+
+void FFBSync(ScrnInfoPtr pScrn);
+
+#define VERSION 4000
+#define FFB_NAME "SUNFFB"
+#define FFB_DRIVER_NAME "sunffb"
+#define FFB_MAJOR_VERSION 1
+#define FFB_MINOR_VERSION 0
+#define FFB_PATCHLEVEL 0
+
+/* 
+ * This contains the functions needed by the server after loading the driver
+ * module.  It must be supplied, and gets passed back by the SetupProc
+ * function in the dynamic case.  In the static case, a reference to this
+ * is compiled in, and this requires that the name of this DriverRec be
+ * an upper-case version of the driver name.
+ */
+
+DriverRec SUNFFB = {
+    VERSION,
+    FFB_DRIVER_NAME,
+    FFBIdentify,
+    FFBProbe,
+    FFBAvailableOptions,
+    NULL,
+    0
+};
+
+typedef enum {
+    OPTION_SW_CURSOR,
+    OPTION_HW_CURSOR,
+    OPTION_NOACCEL
+} FFBOpts;
+
+static const OptionInfoRec FFBOptions[] = {
+    { OPTION_SW_CURSOR,		"SWcursor",	OPTV_BOOLEAN,	{0}, FALSE },
+    { OPTION_HW_CURSOR,		"HWcursor",	OPTV_BOOLEAN,	{0}, FALSE },
+    { OPTION_NOACCEL,		"NoAccel",	OPTV_BOOLEAN,	{0}, FALSE },
+    { -1,			NULL,		OPTV_NONE,	{0}, FALSE }
+};
+
+#ifdef XFree86LOADER
+
+static MODULESETUPPROTO(ffbSetup);
+
+static XF86ModuleVersionInfo sunffbVersRec =
+{
+	"sunffb",
+	MODULEVENDORSTRING,
+	MODINFOSTRING1,
+	MODINFOSTRING2,
+	XF86_VERSION_CURRENT,
+	FFB_MAJOR_VERSION, FFB_MINOR_VERSION, FFB_PATCHLEVEL,
+	ABI_CLASS_VIDEODRV,
+	ABI_VIDEODRV_VERSION,
+	MOD_CLASS_VIDEODRV,
+	{0,0,0,0}
+};
+
+XF86ModuleData sunffbModuleData = { &sunffbVersRec, ffbSetup, NULL };
+
+pointer
+ffbSetup(pointer module, pointer opts, int *errmaj, int *errmin)
+{
+    static Bool setupDone = FALSE;
+
+    if (!setupDone) {
+	setupDone = TRUE;
+	xf86AddDriver(&SUNFFB, module, 0);
+
+	/*
+	 * Modules that this driver always requires can be loaded here
+	 * by calling LoadSubModule().
+	 */
+
+	/*
+	 * The return value must be non-NULL on success even though there
+	 * is no TearDownProc.
+	 */
+	return (pointer)TRUE;
+    } else {
+	if (errmaj) *errmaj = LDR_ONCEONLY;
+	return NULL;
+    }
+}
+
+#endif /* XFree86LOADER */
+
+static Bool
+FFBGetRec(ScrnInfoPtr pScrn)
+{
+    /*
+     * Allocate an FFBRec, and hook it into pScrn->driverPrivate.
+     * pScrn->driverPrivate is initialised to NULL, so we can check if
+     * the allocation has already been done.
+     */
+    if (pScrn->driverPrivate != NULL)
+	return TRUE;
+
+    pScrn->driverPrivate = xnfcalloc(sizeof(FFBRec), 1);
+    return TRUE;
+}
+
+static void
+FFBFreeRec(ScrnInfoPtr pScrn)
+{
+    FFBPtr pFfb;
+
+    if (pScrn->driverPrivate == NULL)
+	return;
+
+    pFfb = GET_FFB_FROM_SCRN(pScrn);
+
+    xfree(pScrn->driverPrivate);
+    pScrn->driverPrivate = NULL;
+
+    return;
+}
+
+static const OptionInfoRec *
+FFBAvailableOptions(int chipid, int busid)
+{
+    return FFBOptions;
+}
+
+/* Mandatory */
+static void
+FFBIdentify(int flags)
+{
+    xf86Msg(X_INFO, "%s: driver for Creator, Creator 3D and Elite 3D\n", FFB_NAME);
+}
+
+
+/* Mandatory */
+static Bool
+FFBProbe(DriverPtr drv, int flags)
+{
+    int i;
+    GDevPtr *devSections;
+    int *usedChips;
+    int numDevSections;
+    int numUsed;
+    Bool foundScreen = FALSE;
+    EntityInfoPtr pEnt;
+
+    /*
+     * The aim here is to find all cards that this driver can handle,
+     * and for the ones not already claimed by another driver, claim the
+     * slot, and allocate a ScrnInfoRec.
+     *
+     * This should be a minimal probe, and it should under no circumstances
+     * change the state of the hardware.  Because a device is found, don't
+     * assume that it will be used.  Don't do any initialisations other than
+     * the required ScrnInfoRec initialisations.  Don't allocate any new
+     * data structures.
+     */
+
+    /*
+     * Next we check, if there has been a chipset override in the config file.
+     * For this we must find out if there is an active device section which
+     * is relevant, i.e., which has no driver specified or has THIS driver
+     * specified.
+     */
+
+    if ((numDevSections = xf86MatchDevice(FFB_DRIVER_NAME,
+					  &devSections)) <= 0) {
+	/*
+	 * There's no matching device section in the config file, so quit
+	 * now.
+	 */
+	return FALSE;
+    }
+
+    /*
+     * We need to probe the hardware first.  We then need to see how this
+     * fits in with what is given in the config file, and allow the config
+     * file info to override any contradictions.
+     */
+
+    numUsed = xf86MatchSbusInstances(FFB_NAME, SBUS_DEVICE_FFB,
+		   devSections, numDevSections,
+		   drv, &usedChips);
+				    
+    xfree(devSections);
+    if (numUsed <= 0)
+	return FALSE;
+
+    if (flags & PROBE_DETECT)
+	foundScreen = TRUE;
+    else for (i = 0; i < numUsed; i++) {
+	pEnt = xf86GetEntityInfo(usedChips[i]);
+
+	/*
+	 * Check that nothing else has claimed the slots.
+	 */
+	if(pEnt->active) {
+	    ScrnInfoPtr pScrn;
+	    
+	    /* Allocate a ScrnInfoRec and claim the slot */
+	    pScrn = xf86AllocateScreen(drv, 0);
+
+	    /* Fill in what we can of the ScrnInfoRec */
+	    pScrn->driverVersion = VERSION;
+	    pScrn->driverName	 = FFB_DRIVER_NAME;
+	    pScrn->name		 = FFB_NAME;
+	    pScrn->Probe	 = FFBProbe;
+	    pScrn->PreInit	 = FFBPreInit;
+	    pScrn->ScreenInit	 = FFBScreenInit;
+  	    pScrn->SwitchMode	 = FFBSwitchMode;
+  	    pScrn->AdjustFrame	 = FFBAdjustFrame;
+	    pScrn->EnterVT	 = FFBEnterVT;
+	    pScrn->LeaveVT	 = FFBLeaveVT;
+	    pScrn->FreeScreen	 = FFBFreeScreen;
+	    pScrn->ValidMode	 = FFBValidMode;
+	    xf86AddEntityToScreen(pScrn, pEnt->index);
+	    foundScreen = TRUE;
+	}
+	xfree(pEnt);
+    }
+    xfree(usedChips);
+    return foundScreen;
+}
+
+/* Mandatory */
+static Bool
+FFBPreInit(ScrnInfoPtr pScrn, int flags)
+{
+    FFBPtr pFfb;
+    sbusDevicePtr psdp;
+    MessageType from;
+    int i;
+
+    if (flags & PROBE_DETECT) return FALSE;
+
+    /*
+     * Note: This function is only called once at server startup, and
+     * not at the start of each server generation.  This means that
+     * only things that are persistent across server generations can
+     * be initialised here.  xf86Screens[] is (pScrn is a pointer to one
+     * of these).  Privates allocated using xf86AllocateScrnInfoPrivateIndex()  
+     * are too, and should be used for data that must persist across
+     * server generations.
+     *
+     * Per-generation data should be allocated with
+     * AllocateScreenPrivateIndex() from the ScreenInit() function.
+     */
+
+    /* Allocate the FFBRec driverPrivate */
+    if (!FFBGetRec(pScrn))
+	return FALSE;
+
+    pFfb = GET_FFB_FROM_SCRN(pScrn);
+    
+    /* Set pScrn->monitor */
+    pScrn->monitor = pScrn->confScreen->monitor;
+
+    /* This driver doesn't expect more than one entity per screen */
+    if (pScrn->numEntities > 1)
+	return FALSE;
+    /* This is the general case */
+    for (i = 0; i < pScrn->numEntities; i++) {
+	EntityInfoPtr pEnt = xf86GetEntityInfo(pScrn->entityList[i]);
+
+	/* FFB is purely UPA (but we handle it as SBUS) */
+	if (pEnt->location.type == BUS_SBUS) {
+	    psdp = xf86GetSbusInfoForEntity(pEnt->index);
+	    pFfb->psdp = psdp;
+	} else
+	    return FALSE;
+    }
+
+    /*********************
+    deal with depth
+    *********************/
+    
+    if (!xf86SetDepthBpp(pScrn, 24, 0, 32, Support32bppFb)) {
+	return FALSE;
+    } else {
+	/* Check that the returned depth is one we support */
+	switch (pScrn->depth) {
+	case 24:
+	    /* OK */
+	    break;
+	default:
+	    xf86DrvMsg(pScrn->scrnIndex, X_ERROR,
+		       "Given depth (%d) is not supported by this driver\n",
+		       pScrn->depth);
+	    return FALSE;
+	}
+    }
+
+    /* Collect all of the relevant option flags (fill in pScrn->options) */
+    xf86CollectOptions(pScrn, NULL);
+    /* Process the options */
+    if (!(pFfb->Options = xalloc(sizeof(FFBOptions))))
+	return FALSE;
+    memcpy(pFfb->Options, FFBOptions, sizeof(FFBOptions));
+    xf86ProcessOptions(pScrn->scrnIndex, pScrn->options, pFfb->Options);
+    
+    /*
+     * This must happen after pScrn->display has been set because
+     * xf86SetWeight references it.
+     */
+    if (pScrn->depth > 8) {
+	rgb weight = {8, 8, 8};
+	rgb mask = {0xff, 0xff00, 0xff0000};
+
+	if (!xf86SetWeight(pScrn, weight, mask)) {
+	    return FALSE;
+	}
+    }
+
+    if (!xf86SetDefaultVisual(pScrn, -1))
+	return FALSE;
+
+    /*
+     * The new cmap code requires this to be initialised.
+     */
+
+    {
+	Gamma zeros = {0.0, 0.0, 0.0};
+
+	if (!xf86SetGamma(pScrn, zeros)) {
+	    return FALSE;
+	}
+    }
+
+    /* Set the bits per RGB for 8bpp mode */
+    from = X_DEFAULT;
+
+    /* determine whether we use hardware or software cursor */
+    
+    pFfb->HWCursor = TRUE;
+    if (xf86GetOptValBool(pFfb->Options, OPTION_HW_CURSOR, &pFfb->HWCursor))
+	from = X_CONFIG;
+    if (xf86ReturnOptValBool(pFfb->Options, OPTION_SW_CURSOR, FALSE)) {
+	from = X_CONFIG;
+	pFfb->HWCursor = FALSE;
+    }
+    
+    xf86DrvMsg(pScrn->scrnIndex, from, "Using %s cursor\n",
+		pFfb->HWCursor ? "HW" : "SW");
+
+    if (xf86ReturnOptValBool(pFfb->Options, OPTION_NOACCEL, FALSE)) {
+	pFfb->NoAccel = TRUE;
+	xf86DrvMsg(pScrn->scrnIndex, X_CONFIG, "Acceleration disabled\n");
+    }
+        
+    if (xf86LoadSubModule(pScrn, "xf8_32wid") == NULL) {
+	FFBFreeRec(pScrn);
+	return FALSE;
+    }
+
+    if (xf86LoadSubModule(pScrn, "cfb32") == NULL) {
+	FFBFreeRec(pScrn);
+	return FALSE;
+    }
+
+    if (xf86LoadSubModule(pScrn, "cfb") == NULL) {
+	FFBFreeRec(pScrn);
+	return FALSE;
+    }
+
+    if (pFfb->HWCursor && xf86LoadSubModule(pScrn, "ramdac") == NULL) {
+	FFBFreeRec(pScrn);
+	return FALSE;
+    }
+
+    if (xf86LoadSubModule(pScrn, "dbe") == NULL) {
+	FFBFreeRec(pScrn);
+	return FALSE;
+    }
+
+#if 0
+/*#ifdef XF86DRI*/
+/*
+ * Loading this automatically isn't compatible
+ * to the behavior of other drivers
+ */
+    if (xf86LoadSubModule(pScrn, "drm") == NULL) {
+	FFBFreeRec(pScrn);
+	return FALSE;
+    }
+
+    if (xf86LoadSubModule(pScrn, "dri") == NULL) {
+	FFBFreeRec(pScrn);
+	return FALSE;
+    }
+#endif
+
+    /*********************
+    set up clock and mode stuff
+    *********************/
+    
+    pScrn->progClock = TRUE;
+
+    if(pScrn->display->virtualX || pScrn->display->virtualY) {
+	xf86DrvMsg(pScrn->scrnIndex, X_WARNING,
+		   "FFB does not support a virtual desktop\n");
+	pScrn->display->virtualX = 0;
+	pScrn->display->virtualY = 0;
+    }
+
+    xf86SbusUseBuiltinMode(pScrn, pFfb->psdp);
+    pScrn->currentMode = pScrn->modes;
+    pScrn->displayWidth = pScrn->virtualX;
+
+    /* Set display resolution */
+    xf86SetDpi(pScrn, 0, 0);
+
+    return TRUE;
+}
+
+/* Determine the FFB/AFB board type.  We need this information even
+ * if acceleration is disabled because the ramdac support layer needs
+ * to know what kind of FFB/AFB this is.
+ */
+static void
+FFBProbeBoardType(FFBPtr pFfb)
+{
+	ffb_fbcPtr ffb = pFfb->regs;
+	volatile unsigned int *afb_fem;
+	unsigned int val;
+
+	afb_fem = ((volatile unsigned int *) ((char *)ffb + 0x1540));
+	val = *afb_fem;
+	val &= 0x7f;
+
+	xf86Msg(X_INFO, "%s: ", pFfb->psdp->device);
+	if (val == 0x3f || val == 0x07 || val == 0x01) {
+		/* When firmware has not been loaded onto AFB we
+		 * just assume it is an M6 board.
+		 */
+		if (val == 0x3f || val != 0x07) {
+			pFfb->ffb_type = afb_m6;
+			ErrorF("AFB: Detected Elite3D/M6.\n");
+		} else {
+			pFfb->ffb_type = afb_m3;
+			ErrorF("AFB: Detected Elite3D/M3.\n");
+		}
+
+		/* These attributes are invariant on AFB. */
+		pFfb->has_double_res = 0;
+		pFfb->has_z_buffer = 1;
+		pFfb->has_double_buffer = 1;
+	} else {
+		unsigned char sbits;
+
+		/* Read the board strapping bits twice, because sometimes
+		 * the strapping pins can get misrouted to the bus interface
+		 * on the first attempt.  The second attempt will get the
+		 * correct value.
+		 */
+		sbits = *((volatile unsigned char *)pFfb->strapping_bits);
+		sbits = *((volatile unsigned char *)pFfb->strapping_bits);
+		switch (sbits & 0x78) {
+		case (0x0 << 5) | (0x0 << 3):
+			pFfb->ffb_type = ffb1_prototype;
+			ErrorF("Detected FFB1 pre-FCS prototype, ");
+			break;
+		case (0x0 << 5) | (0x1 << 3):
+			pFfb->ffb_type = ffb1_standard;
+			ErrorF("Detected FFB1, ");
+			break;
+		case (0x0 << 5) | (0x3 << 3):
+			pFfb->ffb_type = ffb1_speedsort;
+			ErrorF("Detected FFB1-SpeedSort, ");
+			break;
+		case (0x1 << 5) | (0x0 << 3):
+			pFfb->ffb_type = ffb2_prototype;
+			ErrorF("Detected FFB2/vertical pre-FCS prototype, ");
+			break;
+		case (0x1 << 5) | (0x1 << 3):
+			pFfb->ffb_type = ffb2_vertical;
+			ErrorF("Detected FFB2/vertical, ");
+			break;
+		case (0x1 << 5) | (0x2 << 3):
+			pFfb->ffb_type = ffb2_vertical_plus;
+			ErrorF("Detected FFB2+/vertical, ");
+			break;
+		case (0x2 << 5) | (0x0 << 3):
+			pFfb->ffb_type = ffb2_horizontal;
+			ErrorF("Detected FFB2/horizontal, ");
+			break;
+		case (0x2 << 5) | (0x2 << 3):
+			pFfb->ffb_type = ffb2_horizontal;
+			ErrorF("Detected FFB2+/horizontal, ");
+			break;
+		default:
+			pFfb->ffb_type = ffb2_vertical;
+			ErrorF("Unknown boardID[%08x], assuming FFB2, ", sbits);
+			break;
+		};
+
+		if (sbits & (1 << 2)) {
+			ErrorF("DoubleRES, ");
+			pFfb->has_double_res = 1;
+		} else {
+			pFfb->has_double_res = 0;
+		}
+		if (sbits & (1 << 1)) {
+			ErrorF("Z-buffer, ");
+			pFfb->has_z_buffer = 1;
+		} else {
+			pFfb->has_z_buffer = 0;
+		}
+		if (sbits & (1 << 0)) {
+			ErrorF("Double-buffered.\n");
+
+			/* This state really means to the driver that the double
+			 * buffers are available for hw accelerate Dbe.  When the
+			 * FFB is in high-resolution mode, the buffers are combined
+			 * into one single large framebuffer.  So in high-resolution
+			 * hw accelerated double-buffering is not available.
+			 */
+			if ((ffb->fbcfg0 & FFB_FBCFG0_RES_MASK) != FFB_FBCFG0_RES_HIGH)
+				pFfb->has_double_buffer = 1;
+			else
+				pFfb->has_double_buffer = 1;
+		} else {
+			ErrorF("Single-buffered.\n");
+			pFfb->has_double_buffer = 0;
+		}
+	}
+}
+
+static unsigned long CreatorUnaccelGeneration = 0;
+static int CreatorUnaccelWindowPrivateIndex;
+
+#define CreatorUnaccelGetWid(w) \
+	((w)->devPrivates[CreatorUnaccelWindowPrivateIndex].val)
+#define CreatorUnaccelSetWid(w,wid) \
+	(((w)->devPrivates[CreatorUnaccelWindowPrivateIndex].val) = (wid))
+
+static unsigned int
+CreatorWidGet(WindowPtr pWin)
+{
+	return CreatorUnaccelGetWid(pWin);
+}
+
+static Bool
+CreatorWidAlloc(WindowPtr pWin)
+{
+	ScreenPtr pScreen = pWin->drawable.pScreen;
+	ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
+	FFBPtr pFfb = GET_FFB_FROM_SCRN(pScrn);
+	unsigned int wid;
+	int i, visual, visclass;
+
+	visual = wVisual(pWin);
+	visclass = 0;
+	for (i = 0; i < pScreen->numVisuals; i++) {
+		if (pScreen->visuals[i].vid == visual) {
+			visclass = pScreen->visuals[i].class;
+			break;
+		}
+	}
+
+	wid = FFBWidAlloc(pFfb, visclass, wColormap(pWin), TRUE);
+	if (wid == (unsigned int) -1)
+		return FALSE;
+
+	CreatorUnaccelSetWid(pWin, wid);
+
+	return TRUE;
+}
+
+static void
+CreatorWidFree(WindowPtr pWin)
+{
+	ScrnInfoPtr pScrn = xf86Screens[pWin->drawable.pScreen->myNum];
+	FFBPtr pFfb = GET_FFB_FROM_SCRN(pScrn);
+	unsigned int wid = CreatorUnaccelGetWid(pWin);
+
+	FFBWidFree(pFfb, wid);
+}
+
+static cfb8_32WidOps CreatorUnaccelWidOps = {
+	CreatorWidGet,
+	CreatorWidAlloc,
+	CreatorWidFree,
+	NULL,
+	NULL
+};
+
+static Bool
+CreatorUnaccelWidInit(ScreenPtr pScreen)
+{
+	if (serverGeneration != CreatorUnaccelGeneration) {
+		CreatorUnaccelWindowPrivateIndex =
+			AllocateWindowPrivateIndex();
+		if (CreatorUnaccelWindowPrivateIndex == -1)
+			return FALSE;
+	}
+
+	return TRUE;
+}
+
+/* Mandatory */
+
+/* This gets called at the start of each server generation */
+
+static Bool
+FFBScreenInit(int scrnIndex, ScreenPtr pScreen, int argc, char **argv)
+{
+    ScrnInfoPtr pScrn;
+    FFBPtr pFfb;
+    int ret;
+    unsigned int afb_fem;
+    VisualPtr visual;
+
+    /* Add in our Dbe hook. */
+    if (!FFBDbePreInit(pScreen))
+	return FALSE;
+
+    /* 
+     * First get the ScrnInfoRec
+     */
+    pScrn = xf86Screens[pScreen->myNum];
+
+    pFfb = GET_FFB_FROM_SCRN(pScrn);
+
+    /* Map the FFB framebuffer, for each view. */
+
+    /* 24-bit RGB Dumb view */
+    pFfb->fb = pFfb->dfb24 =
+	xf86MapSbusMem (pFfb->psdp, FFB_DFB24_VOFF, 0x1000000);
+
+    if (! pFfb->dfb24)
+	return FALSE;
+
+    /* 8-bit R Dumb view */
+    pFfb->dfb8r =
+	xf86MapSbusMem (pFfb->psdp, FFB_DFB8R_VOFF, 0x400000);
+
+    if (! pFfb->dfb8r)
+	return FALSE;
+
+    /* 8-bit X Dumb view */
+    pFfb->dfb8x =
+	xf86MapSbusMem (pFfb->psdp, FFB_DFB8X_VOFF, 0x400000);
+
+    if (! pFfb->dfb8x)
+	return FALSE;
+
+    /* 32-bit RGB Smart view */
+    pFfb->sfb32 =
+	xf86MapSbusMem (pFfb->psdp, FFB_SFB32_VOFF, 0x1000000);
+
+    if (!pFfb->sfb32)
+	return FALSE;
+
+    /* 8-bit R Smart view */
+    pFfb->sfb8r =
+	xf86MapSbusMem(pFfb->psdp, FFB_SFB8R_VOFF, 0x400000);
+
+    if (!pFfb->sfb8r)
+	return FALSE;
+
+    /* 8-bit X Smart view */
+    pFfb->sfb8x =
+	xf86MapSbusMem(pFfb->psdp, FFB_SFB8X_VOFF, 0x400000);
+
+    if (!pFfb->sfb8x)
+	return FALSE;
+
+    /* Map the rendering pipeline */
+    pFfb->regs =
+	xf86MapSbusMem (pFfb->psdp, FFB_FBC_REGS_VOFF, 16384);
+
+    if (! pFfb->regs)
+	return FALSE;
+
+    /* Map the ramdac */
+    pFfb->dac =
+	xf86MapSbusMem (pFfb->psdp, FFB_DAC_VOFF, 8192);
+
+    if (! pFfb->dac)
+	return FALSE;
+
+    /* Map the board strapping bits */
+    pFfb->strapping_bits = (volatile unsigned int *)
+	    xf86MapSbusMem(pFfb->psdp, FFB_EXP_VOFF, 8192);
+
+    if (! pFfb->strapping_bits)
+	return FALSE;
+
+    /* Probe for the type of FFB/AFB we have. */
+    FFBProbeBoardType(pFfb);
+
+    /* Now that we have the board type, we can init the ramdac layer. */
+    if (FFBDacInit(pFfb) == FALSE)
+	return FALSE;
+
+    /* OK, a fun gross hack to detect if this is
+     * AFB and if so whether the correct firmware
+     * has been loaded.  The machine will flatline
+     * if you try to use certain acceleration features
+     * without the full firmware loaded.
+     *
+     * The bootup Elite3D/AFB firmware is minimal, and
+     * will leave the FloatEnableMask register at a
+     * value of 0x01.  Creator{,3D} lacks the FEM register
+     * and will return a "nonsense" value on attempts to
+     * read this location.  After experimentation, an
+     * appropriate definition for "nonsense" seems to
+     * be anything with all low 7 bits not 0x3f, 0x07,
+     * of 0x01.
+     *
+     * If the FEM register is non-zero and is some value
+     * other than 0x1 (usually 0x3f or 0x7 depending upon
+     * whether the card has 3 or 6 floats) we can assume
+     * the correct firmware has been loaded. -DaveM
+     */
+    afb_fem = *(unsigned int *)((char *)pFfb->regs + 0x1540);
+    if ((afb_fem & 0x7f) != 0x3f &&
+	(afb_fem & 0x7f) != 0x07 &&
+	(afb_fem & 0x7f) != 0x01)
+	xf86Msg(X_INFO, "%s: Detected Creator/Creator3D\n", pFfb->psdp->device);
+    else {
+	xf86Msg(X_INFO, "%s: Detected Elite3D M3/M6, checking firmware...\n", pFfb->psdp->device);
+	if (afb_fem == 0x1) {
+	    xf86Msg(X_INFO, "%s: ... AFB firmware not loaded\n", pFfb->psdp->device);
+	    if (!pFfb->NoAccel) {
+		xf86Msg(X_WARNING, "%s: Forcing no acceleration on Elite3D M3/M6\n", pFfb->psdp->device);
+		pFfb->NoAccel = TRUE;
+	    }
+	} else
+	    xf86Msg(X_INFO, "%s: ... AFB firmware is loaded\n", pFfb->psdp->device);
+    }
+
+    /* Darken the screen for aesthetic reasons and set the viewport */
+    FFBSaveScreen(pScreen, SCREEN_SAVER_ON);
+
+    if (pFfb->NoAccel == TRUE) {
+	    if (!CreatorUnaccelWidInit(pScreen))
+		    return FALSE;
+    }
+
+    /*
+     * The next step is to setup the screen's visuals, and initialise the
+     * framebuffer code.  In cases where the framebuffer's default
+     * choices for things like visual layouts and bits per RGB are OK,
+     * this may be as simple as calling the framebuffer's ScreenInit()
+     * function.  If not, the visuals will need to be setup before calling
+     * a fb ScreenInit() function and fixed up after.
+     */
+
+    /*
+     * Reset visual list.
+     */
+    miClearVisualTypes();
+
+    /* Setup the visuals we support. */
+    if (!miSetVisualTypes(24, TrueColorMask | DirectColorMask,
+			  pScrn->rgbBits, TrueColor))
+	    return FALSE;
+    if (!miSetVisualTypes(8, PseudoColorMask | GrayScaleMask | StaticGrayMask,
+			  pScrn->rgbBits, PseudoColor))
+	    return FALSE;
+
+#ifdef XF86DRI
+    if (pFfb->ffb_type != afb_m3 && pFfb->ffb_type != afb_m6 &&
+	pFfb->NoAccel == FALSE) {
+	    pFfb->dri_enabled = FFBDRIScreenInit(pScreen);
+	    if (pFfb->dri_enabled == TRUE)
+		    xf86Msg(X_INFO, "%s: DRM initialized\n",
+			    pFfb->psdp->device);
+	    else
+		    xf86Msg(X_INFO, "%s: DRM setup failed\n",
+			    pFfb->psdp->device);
+    } else {
+	    pFfb->dri_enabled = FALSE;
+    }
+#endif
+
+    /*
+     * Call the framebuffer layer's ScreenInit function, and fill in other
+     * pScreen fields.
+     */
+    if (pFfb->NoAccel == TRUE) {
+	    ret = cfb8_32WidScreenInit(pScreen, pFfb->dfb24, pFfb->dfb8r, pFfb->dfb8x,
+				       pScrn->virtualX, pScrn->virtualY,
+				       pScrn->xDpi, pScrn->yDpi,
+				       2048, 2048, 2048, 8,
+				       &CreatorUnaccelWidOps);
+    } else {
+	    /* Use smart framebuffer aperture for cfb8/cfb32. */
+	    ret = cfb8_32WidScreenInit(pScreen, pFfb->sfb32, pFfb->sfb8r, pFfb->dfb8x,
+				       pScrn->virtualX, pScrn->virtualY,
+				       pScrn->xDpi, pScrn->yDpi,
+				       2048, 2048, 2048, 8,
+				       &CreatorUnaccelWidOps);
+    }
+
+    if (!ret)
+	return FALSE;
+
+    miInitializeBackingStore(pScreen);
+    xf86SetBackingStore(pScreen);
+    xf86SetSilkenMouse(pScreen);
+
+    xf86SetBlackWhitePixels(pScreen);
+
+    if (pScrn->bitsPerPixel > 8) {
+        /* Fixup RGB ordering */
+        visual = pScreen->visuals + pScreen->numVisuals;
+        while (--visual >= pScreen->visuals) {
+	    if ((visual->class | DynamicClass) == DirectColor) {
+		visual->offsetRed = pScrn->offset.red;
+		visual->offsetGreen = pScrn->offset.green;
+		visual->offsetBlue = pScrn->offset.blue;
+		visual->redMask = pScrn->mask.red;
+		visual->greenMask = pScrn->mask.green;
+		visual->blueMask = pScrn->mask.blue;
+	    }
+	}
+    }
+
+    if (!pFfb->NoAccel) {
+	if (!FFBAccelInit(pScreen, pFfb))
+	    return FALSE;
+	xf86Msg(X_INFO, "%s: Using acceleration\n", pFfb->psdp->device);
+    }
+
+    /* Initialise cursor functions */
+    miDCInitialize (pScreen, xf86GetPointerScreenFuncs());
+
+    /* Initialize HW cursor layer. 
+     * Must follow software cursor initialization.
+     */
+    if (pFfb->HWCursor) { 
+	if(!FFBHWCursorInit(pScreen)) {
+	    xf86DrvMsg(pScrn->scrnIndex, X_ERROR, 
+		       "Hardware cursor initialization failed\n");
+	    return(FALSE);
+	}
+	xf86SbusHideOsHwCursor(pFfb->psdp);
+    }
+
+    /* Initialise default colourmap. */
+    if (!miCreateDefColormap(pScreen))
+	return FALSE;
+
+    /* Initialize colormap layer.
+     * Must follow initialization of the default colormap.
+     */
+    if (!xf86HandleColormaps(pScreen, 256, 8,
+			     FFBDacLoadPalette, NULL,
+#if 0
+			     CMAP_PALETTED_TRUECOLOR |
+#endif
+			     CMAP_LOAD_EVEN_IF_OFFSCREEN |
+			     CMAP_RELOAD_ON_MODE_SWITCH))
+	return FALSE;
+
+    /* Setup DGA support. */
+    if (!pFfb->NoAccel)
+	    FFB_InitDGA(pScreen);
+
+#ifdef XF86DRI
+    if (pFfb->dri_enabled) {
+	    /* Now that mi, cfb, drm and others have done their thing, 
+	     * complete the DRI setup.
+	     */
+	    pFfb->dri_enabled = FFBDRIFinishScreenInit(pScreen);
+	    if (pFfb->dri_enabled)
+		    xf86Msg(X_INFO, "%s: DRM finish setup complete\n",
+			    pFfb->psdp->device);
+	    else
+		    xf86Msg(X_INFO, "%s: DRM finish setup failed\n",
+			    pFfb->psdp->device);
+    }
+#endif
+
+    pFfb->CloseScreen = pScreen->CloseScreen;
+    pScreen->CloseScreen = FFBCloseScreen;
+    pScreen->SaveScreen = FFBSaveScreen;
+
+    (void) xf86DPMSInit(pScreen, FFBDPMSMode, 0);
+
+    /* Report any unused options (only for the first generation) */
+    if (serverGeneration == 1) {
+	xf86ShowUnusedOptions(pScrn->scrnIndex, pScrn->options);
+    }
+
+    /* unblank the screen */
+    FFBSaveScreen(pScreen, SCREEN_SAVER_OFF);
+
+    /* Done */
+    return TRUE;
+}
+
+
+/* Usually mandatory */
+static Bool
+FFBSwitchMode(int scrnIndex, DisplayModePtr mode, int flags)
+{
+    return TRUE;
+}
+
+
+/*
+ * This function is used to initialize the Start Address - the first
+ * displayed location in the video memory.
+ */
+/* Usually mandatory */
+static void 
+FFBAdjustFrame(int scrnIndex, int x, int y, int flags)
+{
+    /* we don't support virtual desktops */
+    return;
+}
+
+/*
+ * This is called when VT switching back to the X server.  Its job is
+ * to reinitialise the video mode.
+ */
+
+/* Mandatory */
+static Bool
+FFBEnterVT(int scrnIndex, int flags)
+{
+    ScrnInfoPtr pScrn = xf86Screens[scrnIndex];
+    FFBPtr pFfb = GET_FFB_FROM_SCRN(pScrn);
+
+    pFfb->vtSema = FALSE;
+    if (!pFfb->NoAccel)
+	CreatorVtChange (pScrn->pScreen, TRUE);
+    if (pFfb->HWCursor)
+	xf86SbusHideOsHwCursor (pFfb->psdp);
+
+    FFBDacEnterVT(pFfb);
+
+    return TRUE;
+}
+
+
+/*
+ * This is called when VT switching away from the X server.
+ */
+
+/* Mandatory */
+static void
+FFBLeaveVT(int scrnIndex, int flags)
+{
+    ScrnInfoPtr pScrn = xf86Screens[scrnIndex];
+    FFBPtr pFfb = GET_FFB_FROM_SCRN(pScrn);
+
+    FFBDacLeaveVT(pFfb);
+
+    if (!pFfb->NoAccel)
+	CreatorVtChange (pScrn->pScreen, FALSE);
+
+    if (pFfb->HWCursor)
+	xf86SbusHideOsHwCursor (pFfb->psdp);
+
+    pFfb->vtSema = TRUE;
+    return;
+}
+
+
+/*
+ * This is called at the end of each server generation.  It restores the
+ * original (text) mode.  It should really also unmap the video memory too.
+ */
+
+/* Mandatory */
+static Bool
+FFBCloseScreen(int scrnIndex, ScreenPtr pScreen)
+{
+    ScrnInfoPtr pScrn = xf86Screens[scrnIndex];
+    FFBPtr pFfb = GET_FFB_FROM_SCRN(pScrn);
+
+#ifdef XF86DRI
+    if (pFfb->dri_enabled)
+	    FFBDRICloseScreen(pScreen);
+#endif
+
+    /* Restore kernel ramdac state before we unmap registers. */
+    FFBDacFini(pFfb);
+
+    pScrn->vtSema = FALSE;
+
+    xf86UnmapSbusMem(pFfb->psdp, pFfb->dfb24, 0x1000000);
+    xf86UnmapSbusMem(pFfb->psdp, pFfb->dfb8r, 0x400000);
+    xf86UnmapSbusMem(pFfb->psdp, pFfb->dfb8x, 0x400000);
+    xf86UnmapSbusMem(pFfb->psdp, pFfb->sfb32, 0x1000000);
+    xf86UnmapSbusMem(pFfb->psdp, pFfb->sfb8r, 0x400000);
+    xf86UnmapSbusMem(pFfb->psdp, pFfb->sfb8x, 0x400000);
+    xf86UnmapSbusMem(pFfb->psdp, pFfb->regs, 16384);
+    xf86UnmapSbusMem(pFfb->psdp, pFfb->dac, 8192);
+    xf86UnmapSbusMem(pFfb->psdp, (void *)pFfb->strapping_bits, 8192);
+
+    if (pFfb->HWCursor)
+	xf86SbusHideOsHwCursor (pFfb->psdp);
+
+    pScreen->CloseScreen = pFfb->CloseScreen;
+    return (*pScreen->CloseScreen)(scrnIndex, pScreen);
+}
+
+
+/* Free up any per-generation data structures */
+
+/* Optional */
+static void
+FFBFreeScreen(int scrnIndex, int flags)
+{
+    FFBFreeRec(xf86Screens[scrnIndex]);
+}
+
+
+/* Checks if a mode is suitable for the selected chipset. */
+
+/* Optional */
+static int
+FFBValidMode(int scrnIndex, DisplayModePtr mode, Bool verbose, int flags)
+{
+    if (mode->Flags & V_INTERLACE)
+	return(MODE_BAD);
+
+    return(MODE_OK);
+}
+
+/* Do screen blanking */
+
+/* Mandatory */
+static Bool
+FFBSaveScreen(ScreenPtr pScreen, int mode)
+    /* This function blanks the screen when mode=SCREEN_SAVER_ON and
+       unblanks it when mode=SCREEN_SAVER_OFF.  It is used internally in the
+       FFBScreenInit code `for aesthetic reasons,' and it is used for
+       blanking if you set "xset s on s blank."  The work (such as it is) is
+       done in "ffb_dac.c" `for aesthetic reasons.'
+    */
+{
+    return FFBDacSaveScreen(GET_FFB_FROM_SCREEN(pScreen), mode);
+}
+
+/*
+ * This is the implementation of the Sync() function.
+ */
+void
+FFBSync(ScrnInfoPtr pScrn)
+{
+    return;
+}
+
+/*
+  Hook for DPMS Mode.
+*/
+
+static void
+FFBDPMSMode(ScrnInfoPtr pScrn, int DPMSMode, int flags)
+{
+  FFBDacDPMSMode(GET_FFB_FROM_SCRN(pScrn), DPMSMode, flags);
+}