Adding upstream version 5.10.209.upstream/5.10.209upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1081 insertions, 0 deletions

diff --git a/drivers/video/fbdev/ffb.c b/drivers/video/fbdev/ffb.c
new file mode 100644
index 000000000..948b73184
--- /dev/null
+++ b/drivers/video/fbdev/ffb.c
@@ -0,0 +1,1081 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/* ffb.c: Creator/Elite3D frame buffer driver
+ *
+ * Copyright (C) 2003, 2006 David S. Miller (davem@davemloft.net)
+ * Copyright (C) 1997,1998,1999 Jakub Jelinek (jj@ultra.linux.cz)
+ *
+ * Driver layout based loosely on tgafb.c, see that file for credits.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/fb.h>
+#include <linux/mm.h>
+#include <linux/timer.h>
+#include <linux/of_device.h>
+
+#include <asm/io.h>
+#include <asm/upa.h>
+#include <asm/fbio.h>
+
+#include "sbuslib.h"
+
+/*
+ * Local functions.
+ */
+
+static int ffb_setcolreg(unsigned, unsigned, unsigned, unsigned,
+			 unsigned, struct fb_info *);
+static int ffb_blank(int, struct fb_info *);
+
+static void ffb_imageblit(struct fb_info *, const struct fb_image *);
+static void ffb_fillrect(struct fb_info *, const struct fb_fillrect *);
+static void ffb_copyarea(struct fb_info *, const struct fb_copyarea *);
+static int ffb_sync(struct fb_info *);
+static int ffb_mmap(struct fb_info *, struct vm_area_struct *);
+static int ffb_ioctl(struct fb_info *, unsigned int, unsigned long);
+static int ffb_pan_display(struct fb_var_screeninfo *, struct fb_info *);
+
+/*
+ *  Frame buffer operations
+ */
+
+static const struct fb_ops ffb_ops = {
+	.owner			= THIS_MODULE,
+	.fb_setcolreg		= ffb_setcolreg,
+	.fb_blank		= ffb_blank,
+	.fb_pan_display		= ffb_pan_display,
+	.fb_fillrect		= ffb_fillrect,
+	.fb_copyarea		= ffb_copyarea,
+	.fb_imageblit		= ffb_imageblit,
+	.fb_sync		= ffb_sync,
+	.fb_mmap		= ffb_mmap,
+	.fb_ioctl		= ffb_ioctl,
+#ifdef CONFIG_COMPAT
+	.fb_compat_ioctl	= sbusfb_compat_ioctl,
+#endif
+};
+
+/* Register layout and definitions */
+#define	FFB_SFB8R_VOFF		0x00000000
+#define	FFB_SFB8G_VOFF		0x00400000
+#define	FFB_SFB8B_VOFF		0x00800000
+#define	FFB_SFB8X_VOFF		0x00c00000
+#define	FFB_SFB32_VOFF		0x01000000
+#define	FFB_SFB64_VOFF		0x02000000
+#define	FFB_FBC_REGS_VOFF	0x04000000
+#define	FFB_BM_FBC_REGS_VOFF	0x04002000
+#define	FFB_DFB8R_VOFF		0x04004000
+#define	FFB_DFB8G_VOFF		0x04404000
+#define	FFB_DFB8B_VOFF		0x04804000
+#define	FFB_DFB8X_VOFF		0x04c04000
+#define	FFB_DFB24_VOFF		0x05004000
+#define	FFB_DFB32_VOFF		0x06004000
+#define	FFB_DFB422A_VOFF	0x07004000	/* DFB 422 mode write to A */
+#define	FFB_DFB422AD_VOFF	0x07804000	/* DFB 422 mode with line doubling */
+#define	FFB_DFB24B_VOFF		0x08004000	/* DFB 24bit mode write to B */
+#define	FFB_DFB422B_VOFF	0x09004000	/* DFB 422 mode write to B */
+#define	FFB_DFB422BD_VOFF	0x09804000	/* DFB 422 mode with line doubling */
+#define	FFB_SFB16Z_VOFF		0x0a004000	/* 16bit mode Z planes */
+#define	FFB_SFB8Z_VOFF		0x0a404000	/* 8bit mode Z planes */
+#define	FFB_SFB422_VOFF		0x0ac04000	/* SFB 422 mode write to A/B */
+#define	FFB_SFB422D_VOFF	0x0b404000	/* SFB 422 mode with line doubling */
+#define	FFB_FBC_KREGS_VOFF	0x0bc04000
+#define	FFB_DAC_VOFF		0x0bc06000
+#define	FFB_PROM_VOFF		0x0bc08000
+#define	FFB_EXP_VOFF		0x0bc18000
+
+#define	FFB_SFB8R_POFF		0x04000000UL
+#define	FFB_SFB8G_POFF		0x04400000UL
+#define	FFB_SFB8B_POFF		0x04800000UL
+#define	FFB_SFB8X_POFF		0x04c00000UL
+#define	FFB_SFB32_POFF		0x05000000UL
+#define	FFB_SFB64_POFF		0x06000000UL
+#define	FFB_FBC_REGS_POFF	0x00600000UL
+#define	FFB_BM_FBC_REGS_POFF	0x00600000UL
+#define	FFB_DFB8R_POFF		0x01000000UL
+#define	FFB_DFB8G_POFF		0x01400000UL
+#define	FFB_DFB8B_POFF		0x01800000UL
+#define	FFB_DFB8X_POFF		0x01c00000UL
+#define	FFB_DFB24_POFF		0x02000000UL
+#define	FFB_DFB32_POFF		0x03000000UL
+#define	FFB_FBC_KREGS_POFF	0x00610000UL
+#define	FFB_DAC_POFF		0x00400000UL
+#define	FFB_PROM_POFF		0x00000000UL
+#define	FFB_EXP_POFF		0x00200000UL
+#define FFB_DFB422A_POFF	0x09000000UL
+#define FFB_DFB422AD_POFF	0x09800000UL
+#define FFB_DFB24B_POFF		0x0a000000UL
+#define FFB_DFB422B_POFF	0x0b000000UL
+#define FFB_DFB422BD_POFF	0x0b800000UL
+#define FFB_SFB16Z_POFF		0x0c800000UL
+#define FFB_SFB8Z_POFF		0x0c000000UL
+#define FFB_SFB422_POFF		0x0d000000UL
+#define FFB_SFB422D_POFF	0x0d800000UL
+
+/* Draw operations */
+#define FFB_DRAWOP_DOT		0x00
+#define FFB_DRAWOP_AADOT	0x01
+#define FFB_DRAWOP_BRLINECAP	0x02
+#define FFB_DRAWOP_BRLINEOPEN	0x03
+#define FFB_DRAWOP_DDLINE	0x04
+#define FFB_DRAWOP_AALINE	0x05
+#define FFB_DRAWOP_TRIANGLE	0x06
+#define FFB_DRAWOP_POLYGON	0x07
+#define FFB_DRAWOP_RECTANGLE	0x08
+#define FFB_DRAWOP_FASTFILL	0x09
+#define FFB_DRAWOP_BCOPY	0x0a
+#define FFB_DRAWOP_VSCROLL	0x0b
+
+/* Pixel processor control */
+/* Force WID */
+#define FFB_PPC_FW_DISABLE	0x800000
+#define FFB_PPC_FW_ENABLE	0xc00000
+/* Auxiliary clip */
+#define FFB_PPC_ACE_DISABLE	0x040000
+#define FFB_PPC_ACE_AUX_SUB	0x080000
+#define FFB_PPC_ACE_AUX_ADD	0x0c0000
+/* Depth cue */
+#define FFB_PPC_DCE_DISABLE	0x020000
+#define FFB_PPC_DCE_ENABLE	0x030000
+/* Alpha blend */
+#define FFB_PPC_ABE_DISABLE	0x008000
+#define FFB_PPC_ABE_ENABLE	0x00c000
+/* View clip */
+#define FFB_PPC_VCE_DISABLE	0x001000
+#define FFB_PPC_VCE_2D		0x002000
+#define FFB_PPC_VCE_3D		0x003000
+/* Area pattern */
+#define FFB_PPC_APE_DISABLE	0x000800
+#define FFB_PPC_APE_ENABLE	0x000c00
+/* Transparent background */
+#define FFB_PPC_TBE_OPAQUE	0x000200
+#define FFB_PPC_TBE_TRANSPARENT	0x000300
+/* Z source */
+#define FFB_PPC_ZS_VAR		0x000080
+#define FFB_PPC_ZS_CONST	0x0000c0
+/* Y source */
+#define FFB_PPC_YS_VAR		0x000020
+#define FFB_PPC_YS_CONST	0x000030
+/* X source */
+#define FFB_PPC_XS_WID		0x000004
+#define FFB_PPC_XS_VAR		0x000008
+#define FFB_PPC_XS_CONST	0x00000c
+/* Color (BGR) source */
+#define FFB_PPC_CS_VAR		0x000002
+#define FFB_PPC_CS_CONST	0x000003
+
+#define FFB_ROP_NEW		0x83
+#define FFB_ROP_OLD		0x85
+#define FFB_ROP_NEW_XOR_OLD	0x86
+
+#define FFB_UCSR_FIFO_MASK	0x00000fff
+#define FFB_UCSR_FB_BUSY	0x01000000
+#define FFB_UCSR_RP_BUSY	0x02000000
+#define FFB_UCSR_ALL_BUSY	(FFB_UCSR_RP_BUSY|FFB_UCSR_FB_BUSY)
+#define FFB_UCSR_READ_ERR	0x40000000
+#define FFB_UCSR_FIFO_OVFL	0x80000000
+#define FFB_UCSR_ALL_ERRORS	(FFB_UCSR_READ_ERR|FFB_UCSR_FIFO_OVFL)
+
+struct ffb_fbc {
+	/* Next vertex registers */
+	u32	xxx1[3];
+	u32	alpha;
+	u32	red;
+	u32	green;
+	u32	blue;
+	u32	depth;
+	u32	y;
+	u32	x;
+	u32	xxx2[2];
+	u32	ryf;
+	u32	rxf;
+	u32	xxx3[2];
+
+	u32	dmyf;
+	u32	dmxf;
+	u32	xxx4[2];
+	u32	ebyi;
+	u32	ebxi;
+	u32	xxx5[2];
+	u32	by;
+	u32	bx;
+	u32	dy;
+	u32	dx;
+	u32	bh;
+	u32	bw;
+	u32	xxx6[2];
+
+	u32	xxx7[32];
+
+	/* Setup unit vertex state register */
+	u32	suvtx;
+	u32	xxx8[63];
+
+	/* Control registers */
+	u32	ppc;
+	u32	wid;
+	u32	fg;
+	u32	bg;
+	u32	consty;
+	u32	constz;
+	u32	xclip;
+	u32	dcss;
+	u32	vclipmin;
+	u32	vclipmax;
+	u32	vclipzmin;
+	u32	vclipzmax;
+	u32	dcsf;
+	u32	dcsb;
+	u32	dczf;
+	u32	dczb;
+
+	u32	xxx9;
+	u32	blendc;
+	u32	blendc1;
+	u32	blendc2;
+	u32	fbramitc;
+	u32	fbc;
+	u32	rop;
+	u32	cmp;
+	u32	matchab;
+	u32	matchc;
+	u32	magnab;
+	u32	magnc;
+	u32	fbcfg0;
+	u32	fbcfg1;
+	u32	fbcfg2;
+	u32	fbcfg3;
+
+	u32	ppcfg;
+	u32	pick;
+	u32	fillmode;
+	u32	fbramwac;
+	u32	pmask;
+	u32	xpmask;
+	u32	ypmask;
+	u32	zpmask;
+	u32	clip0min;
+	u32	clip0max;
+	u32	clip1min;
+	u32	clip1max;
+	u32	clip2min;
+	u32	clip2max;
+	u32	clip3min;
+	u32	clip3max;
+
+	/* New 3dRAM III support regs */
+	u32	rawblend2;
+	u32	rawpreblend;
+	u32	rawstencil;
+	u32	rawstencilctl;
+	u32	threedram1;
+	u32	threedram2;
+	u32	passin;
+	u32	rawclrdepth;
+	u32	rawpmask;
+	u32	rawcsrc;
+	u32	rawmatch;
+	u32	rawmagn;
+	u32	rawropblend;
+	u32	rawcmp;
+	u32	rawwac;
+	u32	fbramid;
+
+	u32	drawop;
+	u32	xxx10[2];
+	u32	fontlpat;
+	u32	xxx11;
+	u32	fontxy;
+	u32	fontw;
+	u32	fontinc;
+	u32	font;
+	u32	xxx12[3];
+	u32	blend2;
+	u32	preblend;
+	u32	stencil;
+	u32	stencilctl;
+
+	u32	xxx13[4];
+	u32	dcss1;
+	u32	dcss2;
+	u32	dcss3;
+	u32	widpmask;
+	u32	dcs2;
+	u32	dcs3;
+	u32	dcs4;
+	u32	xxx14;
+	u32	dcd2;
+	u32	dcd3;
+	u32	dcd4;
+	u32	xxx15;
+
+	u32	pattern[32];
+
+	u32	xxx16[256];
+
+	u32	devid;
+	u32	xxx17[63];
+
+	u32	ucsr;
+	u32	xxx18[31];
+
+	u32	mer;
+};
+
+struct ffb_dac {
+	u32	type;
+	u32	value;
+	u32	type2;
+	u32	value2;
+};
+
+#define FFB_DAC_UCTRL		0x1001 /* User Control */
+#define FFB_DAC_UCTRL_MANREV	0x00000f00 /* 4-bit Manufacturing Revision */
+#define FFB_DAC_UCTRL_MANREV_SHIFT 8
+#define FFB_DAC_TGEN		0x6000 /* Timing Generator */
+#define FFB_DAC_TGEN_VIDE	0x00000001 /* Video Enable */
+#define FFB_DAC_DID		0x8000 /* Device Identification */
+#define FFB_DAC_DID_PNUM	0x0ffff000 /* Device Part Number */
+#define FFB_DAC_DID_PNUM_SHIFT	12
+#define FFB_DAC_DID_REV		0xf0000000 /* Device Revision */
+#define FFB_DAC_DID_REV_SHIFT	28
+
+#define FFB_DAC_CUR_CTRL	0x100
+#define FFB_DAC_CUR_CTRL_P0	0x00000001
+#define FFB_DAC_CUR_CTRL_P1	0x00000002
+
+struct ffb_par {
+	spinlock_t		lock;
+	struct ffb_fbc __iomem	*fbc;
+	struct ffb_dac __iomem	*dac;
+
+	u32			flags;
+#define FFB_FLAG_AFB		0x00000001 /* AFB m3 or m6 */
+#define FFB_FLAG_BLANKED	0x00000002 /* screen is blanked */
+#define FFB_FLAG_INVCURSOR	0x00000004 /* DAC has inverted cursor logic */
+
+	u32			fg_cache __attribute__((aligned (8)));
+	u32			bg_cache;
+	u32			rop_cache;
+
+	int			fifo_cache;
+
+	unsigned long		physbase;
+	unsigned long		fbsize;
+
+	int			board_type;
+
+	u32			pseudo_palette[16];
+};
+
+static void FFBFifo(struct ffb_par *par, int n)
+{
+	struct ffb_fbc __iomem *fbc;
+	int cache = par->fifo_cache;
+
+	if (cache - n < 0) {
+		fbc = par->fbc;
+		do {
+			cache = (upa_readl(&fbc->ucsr) & FFB_UCSR_FIFO_MASK);
+			cache -= 8;
+		} while (cache - n < 0);
+	}
+	par->fifo_cache = cache - n;
+}
+
+static void FFBWait(struct ffb_par *par)
+{
+	struct ffb_fbc __iomem *fbc;
+	int limit = 10000;
+
+	fbc = par->fbc;
+	do {
+		if ((upa_readl(&fbc->ucsr) & FFB_UCSR_ALL_BUSY) == 0)
+			break;
+		if ((upa_readl(&fbc->ucsr) & FFB_UCSR_ALL_ERRORS) != 0) {
+			upa_writel(FFB_UCSR_ALL_ERRORS, &fbc->ucsr);
+		}
+		udelay(10);
+	} while (--limit > 0);
+}
+
+static int ffb_sync(struct fb_info *p)
+{
+	struct ffb_par *par = (struct ffb_par *)p->par;
+
+	FFBWait(par);
+	return 0;
+}
+
+static __inline__ void ffb_rop(struct ffb_par *par, u32 rop)
+{
+	if (par->rop_cache != rop) {
+		FFBFifo(par, 1);
+		upa_writel(rop, &par->fbc->rop);
+		par->rop_cache = rop;
+	}
+}
+
+static void ffb_switch_from_graph(struct ffb_par *par)
+{
+	struct ffb_fbc __iomem *fbc = par->fbc;
+	struct ffb_dac __iomem *dac = par->dac;
+	unsigned long flags;
+
+	spin_lock_irqsave(&par->lock, flags);
+	FFBWait(par);
+	par->fifo_cache = 0;
+	FFBFifo(par, 7);
+	upa_writel(FFB_PPC_VCE_DISABLE | FFB_PPC_TBE_OPAQUE |
+		   FFB_PPC_APE_DISABLE | FFB_PPC_CS_CONST,
+		   &fbc->ppc);
+	upa_writel(0x2000707f, &fbc->fbc);
+	upa_writel(par->rop_cache, &fbc->rop);
+	upa_writel(0xffffffff, &fbc->pmask);
+	upa_writel((1 << 16) | (0 << 0), &fbc->fontinc);
+	upa_writel(par->fg_cache, &fbc->fg);
+	upa_writel(par->bg_cache, &fbc->bg);
+	FFBWait(par);
+
+	/* Disable cursor.  */
+	upa_writel(FFB_DAC_CUR_CTRL, &dac->type2);
+	if (par->flags & FFB_FLAG_INVCURSOR)
+		upa_writel(0, &dac->value2);
+	else
+		upa_writel((FFB_DAC_CUR_CTRL_P0 |
+			    FFB_DAC_CUR_CTRL_P1), &dac->value2);
+
+	spin_unlock_irqrestore(&par->lock, flags);
+}
+
+static int ffb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
+{
+	struct ffb_par *par = (struct ffb_par *)info->par;
+
+	/* We just use this to catch switches out of
+	 * graphics mode.
+	 */
+	ffb_switch_from_graph(par);
+
+	if (var->xoffset || var->yoffset || var->vmode)
+		return -EINVAL;
+	return 0;
+}
+
+/**
+ *	ffb_fillrect - Draws a rectangle on the screen.
+ *
+ *	@info: frame buffer structure that represents a single frame buffer
+ *	@rect: structure defining the rectagle and operation.
+ */
+static void ffb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
+{
+	struct ffb_par *par = (struct ffb_par *)info->par;
+	struct ffb_fbc __iomem *fbc = par->fbc;
+	unsigned long flags;
+	u32 fg;
+
+	BUG_ON(rect->rop != ROP_COPY && rect->rop != ROP_XOR);
+
+	fg = ((u32 *)info->pseudo_palette)[rect->color];
+
+	spin_lock_irqsave(&par->lock, flags);
+
+	if (fg != par->fg_cache) {
+		FFBFifo(par, 1);
+		upa_writel(fg, &fbc->fg);
+		par->fg_cache = fg;
+	}
+
+	ffb_rop(par, rect->rop == ROP_COPY ?
+		     FFB_ROP_NEW :
+		     FFB_ROP_NEW_XOR_OLD);
+
+	FFBFifo(par, 5);
+	upa_writel(FFB_DRAWOP_RECTANGLE, &fbc->drawop);
+	upa_writel(rect->dy, &fbc->by);
+	upa_writel(rect->dx, &fbc->bx);
+	upa_writel(rect->height, &fbc->bh);
+	upa_writel(rect->width, &fbc->bw);
+
+	spin_unlock_irqrestore(&par->lock, flags);
+}
+
+/**
+ *	ffb_copyarea - Copies on area of the screen to another area.
+ *
+ *	@info: frame buffer structure that represents a single frame buffer
+ *	@area: structure defining the source and destination.
+ */
+
+static void ffb_copyarea(struct fb_info *info, const struct fb_copyarea *area)
+{
+	struct ffb_par *par = (struct ffb_par *)info->par;
+	struct ffb_fbc __iomem *fbc = par->fbc;
+	unsigned long flags;
+
+	if (area->dx != area->sx ||
+	    area->dy == area->sy) {
+		cfb_copyarea(info, area);
+		return;
+	}
+
+	spin_lock_irqsave(&par->lock, flags);
+
+	ffb_rop(par, FFB_ROP_OLD);
+
+	FFBFifo(par, 7);
+	upa_writel(FFB_DRAWOP_VSCROLL, &fbc->drawop);
+	upa_writel(area->sy, &fbc->by);
+	upa_writel(area->sx, &fbc->bx);
+	upa_writel(area->dy, &fbc->dy);
+	upa_writel(area->dx, &fbc->dx);
+	upa_writel(area->height, &fbc->bh);
+	upa_writel(area->width, &fbc->bw);
+
+	spin_unlock_irqrestore(&par->lock, flags);
+}
+
+/**
+ *	ffb_imageblit - Copies a image from system memory to the screen.
+ *
+ *	@info: frame buffer structure that represents a single frame buffer
+ *	@image: structure defining the image.
+ */
+static void ffb_imageblit(struct fb_info *info, const struct fb_image *image)
+{
+	struct ffb_par *par = (struct ffb_par *)info->par;
+	struct ffb_fbc __iomem *fbc = par->fbc;
+	const u8 *data = image->data;
+	unsigned long flags;
+	u32 fg, bg, xy;
+	u64 fgbg;
+	int i, width, stride;
+
+	if (image->depth > 1) {
+		cfb_imageblit(info, image);
+		return;
+	}
+
+	fg = ((u32 *)info->pseudo_palette)[image->fg_color];
+	bg = ((u32 *)info->pseudo_palette)[image->bg_color];
+	fgbg = ((u64) fg << 32) | (u64) bg;
+	xy = (image->dy << 16) | image->dx;
+	width = image->width;
+	stride = ((width + 7) >> 3);
+
+	spin_lock_irqsave(&par->lock, flags);
+
+	if (fgbg != *(u64 *)&par->fg_cache) {
+		FFBFifo(par, 2);
+		upa_writeq(fgbg, &fbc->fg);
+		*(u64 *)&par->fg_cache = fgbg;
+	}
+
+	if (width >= 32) {
+		FFBFifo(par, 1);
+		upa_writel(32, &fbc->fontw);
+	}
+
+	while (width >= 32) {
+		const u8 *next_data = data + 4;
+
+		FFBFifo(par, 1);
+		upa_writel(xy, &fbc->fontxy);
+		xy += (32 << 0);
+
+		for (i = 0; i < image->height; i++) {
+			u32 val = (((u32)data[0] << 24) |
+				   ((u32)data[1] << 16) |
+				   ((u32)data[2] <<  8) |
+				   ((u32)data[3] <<  0));
+			FFBFifo(par, 1);
+			upa_writel(val, &fbc->font);
+
+			data += stride;
+		}
+
+		data = next_data;
+		width -= 32;
+	}
+
+	if (width) {
+		FFBFifo(par, 2);
+		upa_writel(width, &fbc->fontw);
+		upa_writel(xy, &fbc->fontxy);
+
+		for (i = 0; i < image->height; i++) {
+			u32 val = (((u32)data[0] << 24) |
+				   ((u32)data[1] << 16) |
+				   ((u32)data[2] <<  8) |
+				   ((u32)data[3] <<  0));
+			FFBFifo(par, 1);
+			upa_writel(val, &fbc->font);
+
+			data += stride;
+		}
+	}
+
+	spin_unlock_irqrestore(&par->lock, flags);
+}
+
+static void ffb_fixup_var_rgb(struct fb_var_screeninfo *var)
+{
+	var->red.offset = 0;
+	var->red.length = 8;
+	var->green.offset = 8;
+	var->green.length = 8;
+	var->blue.offset = 16;
+	var->blue.length = 8;
+	var->transp.offset = 0;
+	var->transp.length = 0;
+}
+
+/**
+ *	ffb_setcolreg - Sets a color register.
+ *
+ *	@regno: boolean, 0 copy local, 1 get_user() function
+ *	@red: frame buffer colormap structure
+ *	@green: The green value which can be up to 16 bits wide
+ *	@blue:  The blue value which can be up to 16 bits wide.
+ *	@transp: If supported the alpha value which can be up to 16 bits wide.
+ *	@info: frame buffer info structure
+ */
+static int ffb_setcolreg(unsigned regno,
+			 unsigned red, unsigned green, unsigned blue,
+			 unsigned transp, struct fb_info *info)
+{
+	u32 value;
+
+	if (regno >= 16)
+		return 1;
+
+	red >>= 8;
+	green >>= 8;
+	blue >>= 8;
+
+	value = (blue << 16) | (green << 8) | red;
+	((u32 *)info->pseudo_palette)[regno] = value;
+
+	return 0;
+}
+
+/**
+ *	ffb_blank - Optional function.  Blanks the display.
+ *	@blank_mode: the blank mode we want.
+ *	@info: frame buffer structure that represents a single frame buffer
+ */
+static int ffb_blank(int blank, struct fb_info *info)
+{
+	struct ffb_par *par = (struct ffb_par *)info->par;
+	struct ffb_dac __iomem *dac = par->dac;
+	unsigned long flags;
+	u32 val;
+	int i;
+
+	spin_lock_irqsave(&par->lock, flags);
+
+	FFBWait(par);
+
+	upa_writel(FFB_DAC_TGEN, &dac->type);
+	val = upa_readl(&dac->value);
+	switch (blank) {
+	case FB_BLANK_UNBLANK: /* Unblanking */
+		val |= FFB_DAC_TGEN_VIDE;
+		par->flags &= ~FFB_FLAG_BLANKED;
+		break;
+
+	case FB_BLANK_NORMAL: /* Normal blanking */
+	case FB_BLANK_VSYNC_SUSPEND: /* VESA blank (vsync off) */
+	case FB_BLANK_HSYNC_SUSPEND: /* VESA blank (hsync off) */
+	case FB_BLANK_POWERDOWN: /* Poweroff */
+		val &= ~FFB_DAC_TGEN_VIDE;
+		par->flags |= FFB_FLAG_BLANKED;
+		break;
+	}
+	upa_writel(FFB_DAC_TGEN, &dac->type);
+	upa_writel(val, &dac->value);
+	for (i = 0; i < 10; i++) {
+		upa_writel(FFB_DAC_TGEN, &dac->type);
+		upa_readl(&dac->value);
+	}
+
+	spin_unlock_irqrestore(&par->lock, flags);
+
+	return 0;
+}
+
+static struct sbus_mmap_map ffb_mmap_map[] = {
+	{
+		.voff	= FFB_SFB8R_VOFF,
+		.poff	= FFB_SFB8R_POFF,
+		.size	= 0x0400000
+	},
+	{
+		.voff	= FFB_SFB8G_VOFF,
+		.poff	= FFB_SFB8G_POFF,
+		.size	= 0x0400000
+	},
+	{
+		.voff	= FFB_SFB8B_VOFF,
+		.poff	= FFB_SFB8B_POFF,
+		.size	= 0x0400000
+	},
+	{
+		.voff	= FFB_SFB8X_VOFF,
+		.poff	= FFB_SFB8X_POFF,
+		.size	= 0x0400000
+	},
+	{
+		.voff	= FFB_SFB32_VOFF,
+		.poff	= FFB_SFB32_POFF,
+		.size	= 0x1000000
+	},
+	{
+		.voff	= FFB_SFB64_VOFF,
+		.poff	= FFB_SFB64_POFF,
+		.size	= 0x2000000
+	},
+	{
+		.voff	= FFB_FBC_REGS_VOFF,
+		.poff	= FFB_FBC_REGS_POFF,
+		.size	= 0x0002000
+	},
+	{
+		.voff	= FFB_BM_FBC_REGS_VOFF,
+		.poff	= FFB_BM_FBC_REGS_POFF,
+		.size	= 0x0002000
+	},
+	{
+		.voff	= FFB_DFB8R_VOFF,
+		.poff	= FFB_DFB8R_POFF,
+		.size	= 0x0400000
+	},
+	{
+		.voff	= FFB_DFB8G_VOFF,
+		.poff	= FFB_DFB8G_POFF,
+		.size	= 0x0400000
+	},
+	{
+		.voff	= FFB_DFB8B_VOFF,
+		.poff	= FFB_DFB8B_POFF,
+		.size	= 0x0400000
+	},
+	{
+		.voff	= FFB_DFB8X_VOFF,
+		.poff	= FFB_DFB8X_POFF,
+		.size	= 0x0400000
+	},
+	{
+		.voff	= FFB_DFB24_VOFF,
+		.poff	= FFB_DFB24_POFF,
+		.size	= 0x1000000
+	},
+	{
+		.voff	= FFB_DFB32_VOFF,
+		.poff	= FFB_DFB32_POFF,
+		.size	= 0x1000000
+	},
+	{
+		.voff	= FFB_FBC_KREGS_VOFF,
+		.poff	= FFB_FBC_KREGS_POFF,
+		.size	= 0x0002000
+	},
+	{
+		.voff	= FFB_DAC_VOFF,
+		.poff	= FFB_DAC_POFF,
+		.size	= 0x0002000
+	},
+	{
+		.voff	= FFB_PROM_VOFF,
+		.poff	= FFB_PROM_POFF,
+		.size	= 0x0010000
+	},
+	{
+		.voff	= FFB_EXP_VOFF,
+		.poff	= FFB_EXP_POFF,
+		.size	= 0x0002000
+	},
+	{
+		.voff	= FFB_DFB422A_VOFF,
+		.poff	= FFB_DFB422A_POFF,
+		.size	= 0x0800000
+	},
+	{
+		.voff	= FFB_DFB422AD_VOFF,
+		.poff	= FFB_DFB422AD_POFF,
+		.size	= 0x0800000
+	},
+	{
+		.voff	= FFB_DFB24B_VOFF,
+		.poff	= FFB_DFB24B_POFF,
+		.size	= 0x1000000
+	},
+	{
+		.voff	= FFB_DFB422B_VOFF,
+		.poff	= FFB_DFB422B_POFF,
+		.size	= 0x0800000
+	},
+	{
+		.voff	= FFB_DFB422BD_VOFF,
+		.poff	= FFB_DFB422BD_POFF,
+		.size	= 0x0800000
+	},
+	{
+		.voff	= FFB_SFB16Z_VOFF,
+		.poff	= FFB_SFB16Z_POFF,
+		.size	= 0x0800000
+	},
+	{
+		.voff	= FFB_SFB8Z_VOFF,
+		.poff	= FFB_SFB8Z_POFF,
+		.size	= 0x0800000
+	},
+	{
+		.voff	= FFB_SFB422_VOFF,
+		.poff	= FFB_SFB422_POFF,
+		.size	= 0x0800000
+	},
+	{
+		.voff	= FFB_SFB422D_VOFF,
+		.poff	= FFB_SFB422D_POFF,
+		.size	= 0x0800000
+	},
+	{ .size = 0 }
+};
+
+static int ffb_mmap(struct fb_info *info, struct vm_area_struct *vma)
+{
+	struct ffb_par *par = (struct ffb_par *)info->par;
+
+	return sbusfb_mmap_helper(ffb_mmap_map,
+				  par->physbase, par->fbsize,
+				  0, vma);
+}
+
+static int ffb_ioctl(struct fb_info *info, unsigned int cmd, unsigned long arg)
+{
+	struct ffb_par *par = (struct ffb_par *)info->par;
+
+	return sbusfb_ioctl_helper(cmd, arg, info,
+				   FBTYPE_CREATOR, 24, par->fbsize);
+}
+
+/*
+ *  Initialisation
+ */
+
+static void ffb_init_fix(struct fb_info *info)
+{
+	struct ffb_par *par = (struct ffb_par *)info->par;
+	const char *ffb_type_name;
+
+	if (!(par->flags & FFB_FLAG_AFB)) {
+		if ((par->board_type & 0x7) == 0x3)
+			ffb_type_name = "Creator 3D";
+		else
+			ffb_type_name = "Creator";
+	} else
+		ffb_type_name = "Elite 3D";
+
+	strlcpy(info->fix.id, ffb_type_name, sizeof(info->fix.id));
+
+	info->fix.type = FB_TYPE_PACKED_PIXELS;
+	info->fix.visual = FB_VISUAL_TRUECOLOR;
+
+	/* Framebuffer length is the same regardless of resolution. */
+	info->fix.line_length = 8192;
+
+	info->fix.accel = FB_ACCEL_SUN_CREATOR;
+}
+
+static int ffb_probe(struct platform_device *op)
+{
+	struct device_node *dp = op->dev.of_node;
+	struct ffb_fbc __iomem *fbc;
+	struct ffb_dac __iomem *dac;
+	struct fb_info *info;
+	struct ffb_par *par;
+	u32 dac_pnum, dac_rev, dac_mrev;
+	int err;
+
+	info = framebuffer_alloc(sizeof(struct ffb_par), &op->dev);
+
+	err = -ENOMEM;
+	if (!info)
+		goto out_err;
+
+	par = info->par;
+
+	spin_lock_init(&par->lock);
+	par->fbc = of_ioremap(&op->resource[2], 0,
+			      sizeof(struct ffb_fbc), "ffb fbc");
+	if (!par->fbc)
+		goto out_release_fb;
+
+	par->dac = of_ioremap(&op->resource[1], 0,
+			      sizeof(struct ffb_dac), "ffb dac");
+	if (!par->dac)
+		goto out_unmap_fbc;
+
+	par->rop_cache = FFB_ROP_NEW;
+	par->physbase = op->resource[0].start;
+
+	/* Don't mention copyarea, so SCROLL_REDRAW is always
+	 * used.  It is the fastest on this chip.
+	 */
+	info->flags = (FBINFO_DEFAULT |
+		       /* FBINFO_HWACCEL_COPYAREA | */
+		       FBINFO_HWACCEL_FILLRECT |
+		       FBINFO_HWACCEL_IMAGEBLIT);
+
+	info->fbops = &ffb_ops;
+
+	info->screen_base = (char *) par->physbase + FFB_DFB24_POFF;
+	info->pseudo_palette = par->pseudo_palette;
+
+	sbusfb_fill_var(&info->var, dp, 32);
+	par->fbsize = PAGE_ALIGN(info->var.xres * info->var.yres * 4);
+	ffb_fixup_var_rgb(&info->var);
+
+	info->var.accel_flags = FB_ACCELF_TEXT;
+
+	if (of_node_name_eq(dp, "SUNW,afb"))
+		par->flags |= FFB_FLAG_AFB;
+
+	par->board_type = of_getintprop_default(dp, "board_type", 0);
+
+	fbc = par->fbc;
+	if ((upa_readl(&fbc->ucsr) & FFB_UCSR_ALL_ERRORS) != 0)
+		upa_writel(FFB_UCSR_ALL_ERRORS, &fbc->ucsr);
+
+	dac = par->dac;
+	upa_writel(FFB_DAC_DID, &dac->type);
+	dac_pnum = upa_readl(&dac->value);
+	dac_rev = (dac_pnum & FFB_DAC_DID_REV) >> FFB_DAC_DID_REV_SHIFT;
+	dac_pnum = (dac_pnum & FFB_DAC_DID_PNUM) >> FFB_DAC_DID_PNUM_SHIFT;
+
+	upa_writel(FFB_DAC_UCTRL, &dac->type);
+	dac_mrev = upa_readl(&dac->value);
+	dac_mrev = (dac_mrev & FFB_DAC_UCTRL_MANREV) >>
+		FFB_DAC_UCTRL_MANREV_SHIFT;
+
+	/* Elite3D has different DAC revision numbering, and no DAC revisions
+	 * have the reversed meaning of cursor enable.  Otherwise, Pacifica 1
+	 * ramdacs with manufacturing revision less than 3 have inverted
+	 * cursor logic.  We identify Pacifica 1 as not Pacifica 2, the
+	 * latter having a part number value of 0x236e.
+	 */
+	if ((par->flags & FFB_FLAG_AFB) || dac_pnum == 0x236e) {
+		par->flags &= ~FFB_FLAG_INVCURSOR;
+	} else {
+		if (dac_mrev < 3)
+			par->flags |= FFB_FLAG_INVCURSOR;
+	}
+
+	ffb_switch_from_graph(par);
+
+	/* Unblank it just to be sure.  When there are multiple
+	 * FFB/AFB cards in the system, or it is not the OBP
+	 * chosen console, it will have video outputs off in
+	 * the DAC.
+	 */
+	ffb_blank(FB_BLANK_UNBLANK, info);
+
+	if (fb_alloc_cmap(&info->cmap, 256, 0))
+		goto out_unmap_dac;
+
+	ffb_init_fix(info);
+
+	err = register_framebuffer(info);
+	if (err < 0)
+		goto out_dealloc_cmap;
+
+	dev_set_drvdata(&op->dev, info);
+
+	printk(KERN_INFO "%pOF: %s at %016lx, type %d, "
+	       "DAC pnum[%x] rev[%d] manuf_rev[%d]\n",
+	       dp,
+	       ((par->flags & FFB_FLAG_AFB) ? "AFB" : "FFB"),
+	       par->physbase, par->board_type,
+	       dac_pnum, dac_rev, dac_mrev);
+
+	return 0;
+
+out_dealloc_cmap:
+	fb_dealloc_cmap(&info->cmap);
+
+out_unmap_dac:
+	of_iounmap(&op->resource[1], par->dac, sizeof(struct ffb_dac));
+
+out_unmap_fbc:
+	of_iounmap(&op->resource[2], par->fbc, sizeof(struct ffb_fbc));
+
+out_release_fb:
+	framebuffer_release(info);
+
+out_err:
+	return err;
+}
+
+static int ffb_remove(struct platform_device *op)
+{
+	struct fb_info *info = dev_get_drvdata(&op->dev);
+	struct ffb_par *par = info->par;
+
+	unregister_framebuffer(info);
+	fb_dealloc_cmap(&info->cmap);
+
+	of_iounmap(&op->resource[2], par->fbc, sizeof(struct ffb_fbc));
+	of_iounmap(&op->resource[1], par->dac, sizeof(struct ffb_dac));
+
+	framebuffer_release(info);
+
+	return 0;
+}
+
+static const struct of_device_id ffb_match[] = {
+	{
+		.name = "SUNW,ffb",
+	},
+	{
+		.name = "SUNW,afb",
+	},
+	{},
+};
+MODULE_DEVICE_TABLE(of, ffb_match);
+
+static struct platform_driver ffb_driver = {
+	.driver = {
+		.name = "ffb",
+		.of_match_table = ffb_match,
+	},
+	.probe		= ffb_probe,
+	.remove		= ffb_remove,
+};
+
+static int __init ffb_init(void)
+{
+	if (fb_get_options("ffb", NULL))
+		return -ENODEV;
+
+	return platform_driver_register(&ffb_driver);
+}
+
+static void __exit ffb_exit(void)
+{
+	platform_driver_unregister(&ffb_driver);
+}
+
+module_init(ffb_init);
+module_exit(ffb_exit);
+
+MODULE_DESCRIPTION("framebuffer driver for Creator/Elite3D chipsets");
+MODULE_AUTHOR("David S. Miller <davem@davemloft.net>");
+MODULE_VERSION("2.0");
+MODULE_LICENSE("GPL");