// 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.h>
#include <linux/platform_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_pan_display(struct fb_var_screeninfo *, struct fb_info *);

static int ffb_sbusfb_mmap(struct fb_info *info, struct vm_area_struct *vma);
static int ffb_sbusfb_ioctl(struct fb_info *info, unsigned int cmd, unsigned long arg);

/*
 *  Frame buffer operations
 */

static const struct fb_ops ffb_ops = {
        .owner                  = THIS_MODULE,
        __FB_DEFAULT_SBUS_OPS_RDWR(ffb),
        .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_DEFAULT_SBUS_OPS_IOCTL(ffb),
        __FB_DEFAULT_SBUS_OPS_MMAP(ffb),
};

/* 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_OVENAB    0x00000008 /* Overlay Enable */
#define FFB_DAC_UCTRL_WMODE     0x00000030 /* Window Mode */
#define FFB_DAC_UCTRL_WM_COMB   0x00000000 /* Window Mode = Combined */
#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, uctrl;

        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);

        /* Disable overlay and window modes. */
        upa_writel(FFB_DAC_UCTRL, &dac->type);
        uctrl = upa_readl(&dac->value);
        uctrl &= ~FFB_DAC_UCTRL_WMODE;
        uctrl |= FFB_DAC_UCTRL_WM_COMB;
        uctrl &= ~FFB_DAC_UCTRL_OVENAB;
        upa_writel(FFB_DAC_UCTRL, &dac->type);
        upa_writel(uctrl, &dac->value);

        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: 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 const 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_sbusfb_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_sbusfb_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";

        strscpy(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_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 void 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);
}

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");