/*
 * linux/drivers/video/neofb.c -- NeoMagic Framebuffer Driver
 *
 * Copyright (c) 2001-2002  Denis Oliver Kropp <dok@directfb.org>
 *
 *
 * Card specific code is based on XFree86's neomagic driver.
 * Framebuffer framework code is based on code of cyber2000fb.
 *
 * This file is subject to the terms and conditions of the GNU General
 * Public License.  See the file COPYING in the main directory of this
 * archive for more details.
 *
 *
 * 0.4.1
 *  - Cosmetic changes (dok)
 *
 * 0.4
 *  - Toshiba Libretto support, allow modes larger than LCD size if
 *    LCD is disabled, keep BIOS settings if internal/external display
 *    haven't been enabled explicitly
 *                          (Thomas J. Moore <dark@mama.indstate.edu>)
 *
 * 0.3.3
 *  - Porting over to new fbdev api. (jsimmons)
 *  
 * 0.3.2
 *  - got rid of all floating point (dok) 
 *
 * 0.3.1
 *  - added module license (dok)
 *
 * 0.3
 *  - hardware accelerated clear and move for 2200 and above (dok)
 *  - maximum allowed dotclock is handled now (dok)
 *
 * 0.2.1
 *  - correct panning after X usage (dok)
 *  - added module and kernel parameters (dok)
 *  - no stretching if external display is enabled (dok)
 *
 * 0.2
 *  - initial version (dok)
 *
 *
 * TODO
 * - ioctl for internal/external switching
 * - blanking
 * - 32bit depth support, maybe impossible
 * - disable pan-on-sync, need specs
 *
 * BUGS
 * - white margin on bootup like with tdfxfb (colormap problem?)
 *
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/fb.h>
#include <linux/pci.h>
#include <linux/init.h>
#ifdef CONFIG_TOSHIBA
#include <linux/toshiba.h>
#endif

#include <asm/io.h>
#include <asm/irq.h>
#include <asm/pgtable.h>

#ifdef CONFIG_MTRR
#include <asm/mtrr.h>
#endif

#include <video/vga.h>
#include <video/neomagic.h>

#define NEOFB_VERSION "0.4.2"

/* --------------------------------------------------------------------- */

static bool internal;
static bool external;
static bool libretto;
static bool nostretch;
static bool nopciburst;
static char *mode_option = NULL;

#ifdef MODULE

MODULE_AUTHOR("(c) 2001-2002  Denis Oliver Kropp <dok@convergence.de>");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("FBDev driver for NeoMagic PCI Chips");
module_param(internal, bool, 0);
MODULE_PARM_DESC(internal, "Enable output on internal LCD Display.");
module_param(external, bool, 0);
MODULE_PARM_DESC(external, "Enable output on external CRT.");
module_param(libretto, bool, 0);
MODULE_PARM_DESC(libretto, "Force Libretto 100/110 800x480 LCD.");
module_param(nostretch, bool, 0);
MODULE_PARM_DESC(nostretch,
                 "Disable stretching of modes smaller than LCD.");
module_param(nopciburst, bool, 0);
MODULE_PARM_DESC(nopciburst, "Disable PCI burst mode.");
module_param(mode_option, charp, 0);
MODULE_PARM_DESC(mode_option, "Preferred video mode ('640x480-8@60', etc)");

#endif


/* --------------------------------------------------------------------- */

static biosMode bios8[] = {
        {320, 240, 0x40},
        {300, 400, 0x42},
        {640, 400, 0x20},
        {640, 480, 0x21},
        {800, 600, 0x23},
        {1024, 768, 0x25},
};

static biosMode bios16[] = {
        {320, 200, 0x2e},
        {320, 240, 0x41},
        {300, 400, 0x43},
        {640, 480, 0x31},
        {800, 600, 0x34},
        {1024, 768, 0x37},
};

static biosMode bios24[] = {
        {640, 480, 0x32},
        {800, 600, 0x35},
        {1024, 768, 0x38}
};

#ifdef NO_32BIT_SUPPORT_YET
/* FIXME: guessed values, wrong */
static biosMode bios32[] = {
        {640, 480, 0x33},
        {800, 600, 0x36},
        {1024, 768, 0x39}
};
#endif

static inline void write_le32(int regindex, u32 val, const struct neofb_par *par)
{
        writel(val, par->neo2200 + par->cursorOff + regindex);
}

static int neoFindMode(int xres, int yres, int depth)
{
        int xres_s;
        int i, size;
        biosMode *mode;

        switch (depth) {
        case 8:
                size = ARRAY_SIZE(bios8);
                mode = bios8;
                break;
        case 16:
                size = ARRAY_SIZE(bios16);
                mode = bios16;
                break;
        case 24:
                size = ARRAY_SIZE(bios24);
                mode = bios24;
                break;
#ifdef NO_32BIT_SUPPORT_YET
        case 32:
                size = ARRAY_SIZE(bios32);
                mode = bios32;
                break;
#endif
        default:
                return 0;
        }

        for (i = 0; i < size; i++) {
                if (xres <= mode[i].x_res) {
                        xres_s = mode[i].x_res;
                        for (; i < size; i++) {
                                if (mode[i].x_res != xres_s)
                                        return mode[i - 1].mode;
                                if (yres <= mode[i].y_res)
                                        return mode[i].mode;
                        }
                }
        }
        return mode[size - 1].mode;
}

/*
 * neoCalcVCLK --
 *
 * Determine the closest clock frequency to the one requested.
 */
#define MAX_N 127
#define MAX_D 31
#define MAX_F 1

static void neoCalcVCLK(const struct fb_info *info,
                        struct neofb_par *par, long freq)
{
        int n, d, f;
        int n_best = 0, d_best = 0, f_best = 0;
        long f_best_diff = 0x7ffff;

        for (f = 0; f <= MAX_F; f++)
                for (d = 0; d <= MAX_D; d++)
                        for (n = 0; n <= MAX_N; n++) {
                                long f_out;
                                long f_diff;

                                f_out = ((14318 * (n + 1)) / (d + 1)) >> f;
                                f_diff = abs(f_out - freq);
                                if (f_diff <= f_best_diff) {
                                        f_best_diff = f_diff;
                                        n_best = n;
                                        d_best = d;
                                        f_best = f;
                                }
                                if (f_out > freq)
                                        break;
                        }

        if (info->fix.accel == FB_ACCEL_NEOMAGIC_NM2200 ||
            info->fix.accel == FB_ACCEL_NEOMAGIC_NM2230 ||
            info->fix.accel == FB_ACCEL_NEOMAGIC_NM2360 ||
            info->fix.accel == FB_ACCEL_NEOMAGIC_NM2380) {
                /* NOT_DONE:  We are trying the full range of the 2200 clock.
                   We should be able to try n up to 2047 */
                par->VCLK3NumeratorLow = n_best;
                par->VCLK3NumeratorHigh = (f_best << 7);
        } else
                par->VCLK3NumeratorLow = n_best | (f_best << 7);

        par->VCLK3Denominator = d_best;

#ifdef NEOFB_DEBUG
        printk(KERN_DEBUG "neoVCLK: f:%ld NumLow=%d NumHi=%d Den=%d Df=%ld\n",
               freq,
               par->VCLK3NumeratorLow,
               par->VCLK3NumeratorHigh,
               par->VCLK3Denominator, f_best_diff);
#endif
}

/*
 * vgaHWInit --
 *      Handle the initialization, etc. of a screen.
 *      Return FALSE on failure.
 */

static int vgaHWInit(const struct fb_var_screeninfo *var,
                     struct neofb_par *par)
{
        int hsync_end = var->xres + var->right_margin + var->hsync_len;
        int htotal = (hsync_end + var->left_margin) >> 3;
        int vsync_start = var->yres + var->lower_margin;
        int vsync_end = vsync_start + var->vsync_len;
        int vtotal = vsync_end + var->upper_margin;

        par->MiscOutReg = 0x23;

        if (!(var->sync & FB_SYNC_HOR_HIGH_ACT))
                par->MiscOutReg |= 0x40;

        if (!(var->sync & FB_SYNC_VERT_HIGH_ACT))
                par->MiscOutReg |= 0x80;

        /*
         * Time Sequencer
         */
        par->Sequencer[0] = 0x00;
        par->Sequencer[1] = 0x01;
        par->Sequencer[2] = 0x0F;
        par->Sequencer[3] = 0x00;       /* Font select */
        par->Sequencer[4] = 0x0E;       /* Misc */

        /*
         * CRTC Controller
         */
        par->CRTC[0] = htotal - 5;
        par->CRTC[1] = (var->xres >> 3) - 1;
        par->CRTC[2] = (var->xres >> 3) - 1;
        par->CRTC[3] = ((htotal - 1) & 0x1F) | 0x80;
        par->CRTC[4] = ((var->xres + var->right_margin) >> 3);
        par->CRTC[5] = (((htotal - 1) & 0x20) << 2)
            | (((hsync_end >> 3)) & 0x1F);
        par->CRTC[6] = (vtotal - 2) & 0xFF;
        par->CRTC[7] = (((vtotal - 2) & 0x100) >> 8)
            | (((var->yres - 1) & 0x100) >> 7)
            | ((vsync_start & 0x100) >> 6)
            | (((var->yres - 1) & 0x100) >> 5)
            | 0x10 | (((vtotal - 2) & 0x200) >> 4)
            | (((var->yres - 1) & 0x200) >> 3)
            | ((vsync_start & 0x200) >> 2);
        par->CRTC[8] = 0x00;
        par->CRTC[9] = (((var->yres - 1) & 0x200) >> 4) | 0x40;

        if (var->vmode & FB_VMODE_DOUBLE)
                par->CRTC[9] |= 0x80;

        par->CRTC[10] = 0x00;
        par->CRTC[11] = 0x00;
        par->CRTC[12] = 0x00;
        par->CRTC[13] = 0x00;
        par->CRTC[14] = 0x00;
        par->CRTC[15] = 0x00;
        par->CRTC[16] = vsync_start & 0xFF;
        par->CRTC[17] = (vsync_end & 0x0F) | 0x20;
        par->CRTC[18] = (var->yres - 1) & 0xFF;
        par->CRTC[19] = var->xres_virtual >> 4;
        par->CRTC[20] = 0x00;
        par->CRTC[21] = (var->yres - 1) & 0xFF;
        par->CRTC[22] = (vtotal - 1) & 0xFF;
        par->CRTC[23] = 0xC3;
        par->CRTC[24] = 0xFF;

        /*
         * are these unnecessary?
         * vgaHWHBlankKGA(mode, regp, 0, KGA_FIX_OVERSCAN | KGA_ENABLE_ON_ZERO);
         * vgaHWVBlankKGA(mode, regp, 0, KGA_FIX_OVERSCAN | KGA_ENABLE_ON_ZERO);
         */

        /*
         * Graphics Display Controller
         */
        par->Graphics[0] = 0x00;
        par->Graphics[1] = 0x00;
        par->Graphics[2] = 0x00;
        par->Graphics[3] = 0x00;
        par->Graphics[4] = 0x00;
        par->Graphics[5] = 0x40;
        par->Graphics[6] = 0x05;        /* only map 64k VGA memory !!!! */
        par->Graphics[7] = 0x0F;
        par->Graphics[8] = 0xFF;


        par->Attribute[0] = 0x00;       /* standard colormap translation */
        par->Attribute[1] = 0x01;
        par->Attribute[2] = 0x02;
        par->Attribute[3] = 0x03;
        par->Attribute[4] = 0x04;
        par->Attribute[5] = 0x05;
        par->Attribute[6] = 0x06;
        par->Attribute[7] = 0x07;
        par->Attribute[8] = 0x08;
        par->Attribute[9] = 0x09;
        par->Attribute[10] = 0x0A;
        par->Attribute[11] = 0x0B;
        par->Attribute[12] = 0x0C;
        par->Attribute[13] = 0x0D;
        par->Attribute[14] = 0x0E;
        par->Attribute[15] = 0x0F;
        par->Attribute[16] = 0x41;
        par->Attribute[17] = 0xFF;
        par->Attribute[18] = 0x0F;
        par->Attribute[19] = 0x00;
        par->Attribute[20] = 0x00;
        return 0;
}

static void vgaHWLock(struct vgastate *state)
{
        /* Protect CRTC[0-7] */
        vga_wcrt(state->vgabase, 0x11, vga_rcrt(state->vgabase, 0x11) | 0x80);
}

static void vgaHWUnlock(void)
{
        /* Unprotect CRTC[0-7] */
        vga_wcrt(NULL, 0x11, vga_rcrt(NULL, 0x11) & ~0x80);
}

static void neoLock(struct vgastate *state)
{
        vga_wgfx(state->vgabase, 0x09, 0x00);
        vgaHWLock(state);
}

static void neoUnlock(void)
{
        vgaHWUnlock();
        vga_wgfx(NULL, 0x09, 0x26);
}

/*
 * VGA Palette management
 */
static int paletteEnabled = 0;

static inline void VGAenablePalette(void)
{
        vga_r(NULL, VGA_IS1_RC);
        vga_w(NULL, VGA_ATT_W, 0x00);
        paletteEnabled = 1;
}

static inline void VGAdisablePalette(void)
{
        vga_r(NULL, VGA_IS1_RC);
        vga_w(NULL, VGA_ATT_W, 0x20);
        paletteEnabled = 0;
}

static inline void VGAwATTR(u8 index, u8 value)
{
        if (paletteEnabled)
                index &= ~0x20;
        else
                index |= 0x20;

        vga_r(NULL, VGA_IS1_RC);
        vga_wattr(NULL, index, value);
}

static void vgaHWProtect(int on)
{
        unsigned char tmp;

        tmp = vga_rseq(NULL, 0x01);
        if (on) {
                /*
                 * Turn off screen and disable sequencer.
                 */
                vga_wseq(NULL, 0x00, 0x01);             /* Synchronous Reset */
                vga_wseq(NULL, 0x01, tmp | 0x20);       /* disable the display */

                VGAenablePalette();
        } else {
                /*
                 * Reenable sequencer, then turn on screen.
                 */
                vga_wseq(NULL, 0x01, tmp & ~0x20);      /* reenable display */
                vga_wseq(NULL, 0x00, 0x03);             /* clear synchronousreset */

                VGAdisablePalette();
        }
}

static void vgaHWRestore(const struct fb_info *info,
                         const struct neofb_par *par)
{
        int i;

        vga_w(NULL, VGA_MIS_W, par->MiscOutReg);

        for (i = 1; i < 5; i++)
                vga_wseq(NULL, i, par->Sequencer[i]);

        /* Ensure CRTC registers 0-7 are unlocked by clearing bit 7 or CRTC[17] */
        vga_wcrt(NULL, 17, par->CRTC[17] & ~0x80);

        for (i = 0; i < 25; i++)
                vga_wcrt(NULL, i, par->CRTC[i]);

        for (i = 0; i < 9; i++)
                vga_wgfx(NULL, i, par->Graphics[i]);

        VGAenablePalette();

        for (i = 0; i < 21; i++)
                VGAwATTR(i, par->Attribute[i]);

        VGAdisablePalette();
}


/* -------------------- Hardware specific routines ------------------------- */

/*
 * Hardware Acceleration for Neo2200+
 */
static inline int neo2200_sync(struct fb_info *info)
{
        struct neofb_par *par = info->par;

        while (readl(&par->neo2200->bltStat) & 1)
                cpu_relax();
        return 0;
}

static inline void neo2200_wait_fifo(struct fb_info *info,
                                     int requested_fifo_space)
{
        //  ndev->neo.waitfifo_calls++;
        //  ndev->neo.waitfifo_sum += requested_fifo_space;

        /* FIXME: does not work
           if (neo_fifo_space < requested_fifo_space)
           {
           neo_fifo_waitcycles++;

           while (1)
           {
           neo_fifo_space = (neo2200->bltStat >> 8);
           if (neo_fifo_space >= requested_fifo_space)
           break;
           }
           }
           else
           {
           neo_fifo_cache_hits++;
           }

           neo_fifo_space -= requested_fifo_space;
         */

        neo2200_sync(info);
}

static inline void neo2200_accel_init(struct fb_info *info,
                                      struct fb_var_screeninfo *var)
{
        struct neofb_par *par = info->par;
        Neo2200 __iomem *neo2200 = par->neo2200;
        u32 bltMod, pitch;

        neo2200_sync(info);

        switch (var->bits_per_pixel) {
        case 8:
                bltMod = NEO_MODE1_DEPTH8;
                pitch = var->xres_virtual;
                break;
        case 15:
        case 16:
                bltMod = NEO_MODE1_DEPTH16;
                pitch = var->xres_virtual * 2;
                break;
        case 24:
                bltMod = NEO_MODE1_DEPTH24;
                pitch = var->xres_virtual * 3;
                break;
        default:
                printk(KERN_ERR
                       "neofb: neo2200_accel_init: unexpected bits per pixel!\n");
                return;
        }

        writel(bltMod << 16, &neo2200->bltStat);
        writel((pitch << 16) | pitch, &neo2200->pitch);
}

/* --------------------------------------------------------------------- */

static int
neofb_open(struct fb_info *info, int user)
{
        struct neofb_par *par = info->par;

        if (!par->ref_count) {
                memset(&par->state, 0, sizeof(struct vgastate));
                par->state.flags = VGA_SAVE_MODE | VGA_SAVE_FONTS;
                save_vga(&par->state);
        }
        par->ref_count++;

        return 0;
}

static int
neofb_release(struct fb_info *info, int user)
{
        struct neofb_par *par = info->par;

        if (!par->ref_count)
                return -EINVAL;

        if (par->ref_count == 1) {
                restore_vga(&par->state);
        }
        par->ref_count--;

        return 0;
}

static int
neofb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
{
        struct neofb_par *par = info->par;
        int memlen, vramlen;
        int mode_ok = 0;

        DBG("neofb_check_var");

        if (PICOS2KHZ(var->pixclock) > par->maxClock)
                return -EINVAL;

        /* Is the mode larger than the LCD panel? */
        if (par->internal_display &&
            ((var->xres > par->NeoPanelWidth) ||
             (var->yres > par->NeoPanelHeight))) {
                printk(KERN_INFO
                       "Mode (%dx%d) larger than the LCD panel (%dx%d)\n",
                       var->xres, var->yres, par->NeoPanelWidth,
                       par->NeoPanelHeight);
                return -EINVAL;
        }

        /* Is the mode one of the acceptable sizes? */
        if (!par->internal_display)
                mode_ok = 1;
        else {
                switch (var->xres) {
                case 1280:
                        if (var->yres == 1024)
                                mode_ok = 1;
                        break;
                case 1024:
                        if (var->yres == 768)
                                mode_ok = 1;
                        break;
                case 800:
                        if (var->yres == (par->libretto ? 480 : 600))
                                mode_ok = 1;
                        break;
                case 640:
                        if (var->yres == 480)
                                mode_ok = 1;
                        break;
                }
        }

        if (!mode_ok) {
                printk(KERN_INFO
                       "Mode (%dx%d) won't display properly on LCD\n",
                       var->xres, var->yres);
                return -EINVAL;
        }

        var->red.msb_right = 0;
        var->green.msb_right = 0;
        var->blue.msb_right = 0;
        var->transp.msb_right = 0;

        var->transp.offset = 0;
        var->transp.length = 0;
        switch (var->bits_per_pixel) {
        case 8:         /* PSEUDOCOLOUR, 256 */
                var->red.offset = 0;
                var->red.length = 8;
                var->green.offset = 0;
                var->green.length = 8;
                var->blue.offset = 0;
                var->blue.length = 8;
                break;

        case 16:                /* DIRECTCOLOUR, 64k */
                var->red.offset = 11;
                var->red.length = 5;
                var->green.offset = 5;
                var->green.length = 6;
                var->blue.offset = 0;
                var->blue.length = 5;
                break;

        case 24:                /* TRUECOLOUR, 16m */
                var->red.offset = 16;
                var->red.length = 8;
                var->green.offset = 8;
                var->green.length = 8;
                var->blue.offset = 0;
                var->blue.length = 8;
                break;

#ifdef NO_32BIT_SUPPORT_YET
        case 32:                /* TRUECOLOUR, 16m */
                var->transp.offset = 24;
                var->transp.length = 8;
                var->red.offset = 16;
                var->red.length = 8;
                var->green.offset = 8;
                var->green.length = 8;
                var->blue.offset = 0;
                var->blue.length = 8;
                break;
#endif
        default:
                printk(KERN_WARNING "neofb: no support for %dbpp\n",
                       var->bits_per_pixel);
                return -EINVAL;
        }

        vramlen = info->fix.smem_len;
        if (vramlen > 4 * 1024 * 1024)
                vramlen = 4 * 1024 * 1024;

        if (var->xres_virtual < var->xres)
                var->xres_virtual = var->xres;

        memlen = var->xres_virtual * var->bits_per_pixel * var->yres_virtual >> 3;

        if (memlen > vramlen) {
                var->yres_virtual =  vramlen * 8 / (var->xres_virtual *
                                        var->bits_per_pixel);
                memlen = var->xres_virtual * var->bits_per_pixel *
                                var->yres_virtual / 8;
        }

        /* we must round yres/xres down, we already rounded y/xres_virtual up
           if it was possible. We should return -EINVAL, but I disagree */
        if (var->yres_virtual < var->yres)
                var->yres = var->yres_virtual;
        if (var->xoffset + var->xres > var->xres_virtual)
                var->xoffset = var->xres_virtual - var->xres;
        if (var->yoffset + var->yres > var->yres_virtual)
                var->yoffset = var->yres_virtual - var->yres;

        var->nonstd = 0;
        var->height = -1;
        var->width = -1;

        if (var->bits_per_pixel >= 24 || !par->neo2200)
                var->accel_flags &= ~FB_ACCELF_TEXT;
        return 0;
}

static int neofb_set_par(struct fb_info *info)
{
        struct neofb_par *par = info->par;
        unsigned char temp;
        int i, clock_hi = 0;
        int lcd_stretch;
        int hoffset, voffset;
        int vsync_start, vtotal;

        DBG("neofb_set_par");

        neoUnlock();

        vgaHWProtect(1);        /* Blank the screen */

        vsync_start = info->var.yres + info->var.lower_margin;
        vtotal = vsync_start + info->var.vsync_len + info->var.upper_margin;

        /*
         * This will allocate the datastructure and initialize all of the
         * generic VGA registers.
         */

        if (vgaHWInit(&info->var, par))
                return -EINVAL;

        /*
         * The default value assigned by vgaHW.c is 0x41, but this does
         * not work for NeoMagic.
         */
        par->Attribute[16] = 0x01;

        switch (info->var.bits_per_pixel) {
        case 8:
                par->CRTC[0x13] = info->var.xres_virtual >> 3;
                par->ExtCRTOffset = info->var.xres_virtual >> 11;
                par->ExtColorModeSelect = 0x11;
                break;
        case 16:
                par->CRTC[0x13] = info->var.xres_virtual >> 2;
                par->ExtCRTOffset = info->var.xres_virtual >> 10;
                par->ExtColorModeSelect = 0x13;
                break;
        case 24:
                par->CRTC[0x13] = (info->var.xres_virtual * 3) >> 3;
                par->ExtCRTOffset = (info->var.xres_virtual * 3) >> 11;
                par->ExtColorModeSelect = 0x14;
                break;
#ifdef NO_32BIT_SUPPORT_YET
        case 32:                /* FIXME: guessed values */
                par->CRTC[0x13] = info->var.xres_virtual >> 1;
                par->ExtCRTOffset = info->var.xres_virtual >> 9;
                par->ExtColorModeSelect = 0x15;
                break;
#endif
        default:
                break;
        }

        par->ExtCRTDispAddr = 0x10;

        /* Vertical Extension */
        par->VerticalExt = (((vtotal - 2) & 0x400) >> 10)
            | (((info->var.yres - 1) & 0x400) >> 9)
            | (((vsync_start) & 0x400) >> 8)
            | (((vsync_start) & 0x400) >> 7);

        /* Fast write bursts on unless disabled. */
        if (par->pci_burst)
                par->SysIfaceCntl1 = 0x30;
        else
                par->SysIfaceCntl1 = 0x00;

        par->SysIfaceCntl2 = 0xc0;      /* VESA Bios sets this to 0x80! */

        /* Initialize: by default, we want display config register to be read */
        par->PanelDispCntlRegRead = 1;

        /* Enable any user specified display devices. */
        par->PanelDispCntlReg1 = 0x00;
        if (par->internal_display)
                par->PanelDispCntlReg1 |= 0x02;
        if (par->external_display)
                par->PanelDispCntlReg1 |= 0x01;

        /* If the user did not specify any display devices, then... */
        if (par->PanelDispCntlReg1 == 0x00) {
                /* Default to internal (i.e., LCD) only. */
                par->PanelDispCntlReg1 = vga_rgfx(NULL, 0x20) & 0x03;
        }

        /* If we are using a fixed mode, then tell the chip we are. */
        switch (info->var.xres) {
        case 1280:
                par->PanelDispCntlReg1 |= 0x60;
                break;
        case 1024:
                par->PanelDispCntlReg1 |= 0x40;
                break;
        case 800:
                par->PanelDispCntlReg1 |= 0x20;
                break;
        case 640:
        default:
                break;
        }

        /* Setup shadow register locking. */
        switch (par->PanelDispCntlReg1 & 0x03) {
        case 0x01:              /* External CRT only mode: */
                par->GeneralLockReg = 0x00;
                /* We need to program the VCLK for external display only mode. */
                par->ProgramVCLK = 1;
                break;
        case 0x02:              /* Internal LCD only mode: */
        case 0x03:              /* Simultaneous internal/external (LCD/CRT) mode: */
                par->GeneralLockReg = 0x01;
                /* Don't program the VCLK when using the LCD. */
                par->ProgramVCLK = 0;
                break;
        }

        /*
         * If the screen is to be stretched, turn on stretching for the
         * various modes.
         *
         * OPTION_LCD_STRETCH means stretching should be turned off!
         */
        par->PanelDispCntlReg2 = 0x00;
        par->PanelDispCntlReg3 = 0x00;

        if (par->lcd_stretch && (par->PanelDispCntlReg1 == 0x02) &&     /* LCD only */
            (info->var.xres != par->NeoPanelWidth)) {
                switch (info->var.xres) {
                case 320:       /* Needs testing.  KEM -- 24 May 98 */
                case 400:       /* Needs testing.  KEM -- 24 May 98 */
                case 640:
                case 800:
                case 1024:
                        lcd_stretch = 1;
                        par->PanelDispCntlReg2 |= 0xC6;
                        break;
                default:
                        lcd_stretch = 0;
                        /* No stretching in these modes. */
                }
        } else
                lcd_stretch = 0;

        /*
         * If the screen is to be centerd, turn on the centering for the
         * various modes.
         */
        par->PanelVertCenterReg1 = 0x00;
        par->PanelVertCenterReg2 = 0x00;
        par->PanelVertCenterReg3 = 0x00;
        par->PanelVertCenterReg4 = 0x00;
        par->PanelVertCenterReg5 = 0x00;
        par->PanelHorizCenterReg1 = 0x00;
        par->PanelHorizCenterReg2 = 0x00;
        par->PanelHorizCenterReg3 = 0x00;
        par->PanelHorizCenterReg4 = 0x00;
        par->PanelHorizCenterReg5 = 0x00;


        if (par->PanelDispCntlReg1 & 0x02) {
                if (info->var.xres == par->NeoPanelWidth) {
                        /*
                         * No centering required when the requested display width
                         * equals the panel width.
                         */
                } else {
                        par->PanelDispCntlReg2 |= 0x01;
                        par->PanelDispCntlReg3 |= 0x10;

                        /* Calculate the horizontal and vertical offsets. */
                        if (!lcd_stretch) {
                                hoffset =
                                    ((par->NeoPanelWidth -
                                      info->var.xres) >> 4) - 1;
                                voffset =
                                    ((par->NeoPanelHeight -
                                      info->var.yres) >> 1) - 2;
                        } else {
                                /* Stretched modes cannot be centered. */
                                hoffset = 0;
                                voffset = 0;
                        }

                        switch (info->var.xres) {
                        case 320:       /* Needs testing.  KEM -- 24 May 98 */
                                par->PanelHorizCenterReg3 = hoffset;
                                par->PanelVertCenterReg2 = voffset;
                                break;
                        case 400:       /* Needs testing.  KEM -- 24 May 98 */
                                par->PanelHorizCenterReg4 = hoffset;
                                par->PanelVertCenterReg1 = voffset;
                                break;
                        case 640:
                                par->PanelHorizCenterReg1 = hoffset;
                                par->PanelVertCenterReg3 = voffset;
                                break;
                        case 800:
                                par->PanelHorizCenterReg2 = hoffset;
                                par->PanelVertCenterReg4 = voffset;
                                break;
                        case 1024:
                                par->PanelHorizCenterReg5 = hoffset;
                                par->PanelVertCenterReg5 = voffset;
                                break;
                        case 1280:
                        default:
                                /* No centering in these modes. */
                                break;
                        }
                }
        }

        par->biosMode =
            neoFindMode(info->var.xres, info->var.yres,
                        info->var.bits_per_pixel);

        /*
         * Calculate the VCLK that most closely matches the requested dot
         * clock.
         */
        neoCalcVCLK(info, par, PICOS2KHZ(info->var.pixclock));

        /* Since we program the clocks ourselves, always use VCLK3. */
        par->MiscOutReg |= 0x0C;

        /* alread unlocked above */
        /* BOGUS  vga_wgfx(NULL, 0x09, 0x26); */

        /* don't know what this is, but it's 0 from bootup anyway */
        vga_wgfx(NULL, 0x15, 0x00);

        /* was set to 0x01 by my bios in text and vesa modes */
        vga_wgfx(NULL, 0x0A, par->GeneralLockReg);

        /*
         * The color mode needs to be set before calling vgaHWRestore
         * to ensure the DAC is initialized properly.
         *
         * NOTE: Make sure we don't change bits make sure we don't change
         * any reserved bits.
         */
        temp = vga_rgfx(NULL, 0x90);
        switch (info->fix.accel) {
        case FB_ACCEL_NEOMAGIC_NM2070:
                temp &= 0xF0;   /* Save bits 7:4 */
                temp |= (par->ExtColorModeSelect & ~0xF0);
                break;
        case FB_ACCEL_NEOMAGIC_NM2090:
        case FB_ACCEL_NEOMAGIC_NM2093:
        case FB_ACCEL_NEOMAGIC_NM2097:
        case FB_ACCEL_NEOMAGIC_NM2160:
        case FB_ACCEL_NEOMAGIC_NM2200:
        case FB_ACCEL_NEOMAGIC_NM2230:
        case FB_ACCEL_NEOMAGIC_NM2360:
        case FB_ACCEL_NEOMAGIC_NM2380:
                temp &= 0x70;   /* Save bits 6:4 */
                temp |= (par->ExtColorModeSelect & ~0x70);
                break;
        }

        vga_wgfx(NULL, 0x90, temp);

        /*
         * In some rare cases a lockup might occur if we don't delay
         * here. (Reported by Miles Lane)
         */
        //mdelay(200);

        /*

         * Disable horizontal and vertical graphics and text expansions so
         * that vgaHWRestore works properly.
         */
        temp = vga_rgfx(NULL, 0x25);
        temp &= 0x39;
        vga_wgfx(NULL, 0x25, temp);

        /*
         * Sleep for 200ms to make sure that the two operations above have
         * had time to take effect.
         */
        mdelay(200);

        /*
         * This function handles restoring the generic VGA registers.  */
        vgaHWRestore(info, par);

        /* linear colormap for non palettized modes */
        switch (info->var.bits_per_pixel) {
        case 8:
                /* PseudoColor, 256 */
                info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
                break;
        case 16:
                /* TrueColor, 64k */
                info->fix.visual = FB_VISUAL_TRUECOLOR;

                for (i = 0; i < 64; i++) {
                        outb(i, 0x3c8);

                        outb(i << 1, 0x3c9);
                        outb(i, 0x3c9);
                        outb(i << 1, 0x3c9);
                }
                break;
        case 24:
#ifdef NO_32BIT_SUPPORT_YET
        case 32:
#endif
                /* TrueColor, 16m */
                info->fix.visual = FB_VISUAL_TRUECOLOR;

                for (i = 0; i < 256; i++) {
                        outb(i, 0x3c8);

                        outb(i, 0x3c9);
                        outb(i, 0x3c9);
                        outb(i, 0x3c9);
                }
                break;
        }

        vga_wgfx(NULL, 0x0E, par->ExtCRTDispAddr);
        vga_wgfx(NULL, 0x0F, par->ExtCRTOffset);
        temp = vga_rgfx(NULL, 0x10);
        temp &= 0x0F;           /* Save bits 3:0 */
        temp |= (par->SysIfaceCntl1 & ~0x0F);   /* VESA Bios sets bit 1! */
        vga_wgfx(NULL, 0x10, temp);

        vga_wgfx(NULL, 0x11, par->SysIfaceCntl2);
        vga_wgfx(NULL, 0x15, 0 /*par->SingleAddrPage */ );
        vga_wgfx(NULL, 0x16, 0 /*par->DualAddrPage */ );

        temp = vga_rgfx(NULL, 0x20);
        switch (info->fix.accel) {
        case FB_ACCEL_NEOMAGIC_NM2070:
                temp &= 0xFC;   /* Save bits 7:2 */
                temp |= (par->PanelDispCntlReg1 & ~0xFC);
                break;
        case FB_ACCEL_NEOMAGIC_NM2090:
        case FB_ACCEL_NEOMAGIC_NM2093:
        case FB_ACCEL_NEOMAGIC_NM2097:
        case FB_ACCEL_NEOMAGIC_NM2160:
                temp &= 0xDC;   /* Save bits 7:6,4:2 */
                temp |= (par->PanelDispCntlReg1 & ~0xDC);
                break;
        case FB_ACCEL_NEOMAGIC_NM2200:
        case FB_ACCEL_NEOMAGIC_NM2230:
        case FB_ACCEL_NEOMAGIC_NM2360:
        case FB_ACCEL_NEOMAGIC_NM2380:
                temp &= 0x98;   /* Save bits 7,4:3 */
                temp |= (par->PanelDispCntlReg1 & ~0x98);
                break;
        }
        vga_wgfx(NULL, 0x20, temp);

        temp = vga_rgfx(NULL, 0x25);
        temp &= 0x38;           /* Save bits 5:3 */
        temp |= (par->PanelDispCntlReg2 & ~0x38);
        vga_wgfx(NULL, 0x25, temp);

        if (info->fix.accel != FB_ACCEL_NEOMAGIC_NM2070) {
                temp = vga_rgfx(NULL, 0x30);
                temp &= 0xEF;   /* Save bits 7:5 and bits 3:0 */
                temp |= (par->PanelDispCntlReg3 & ~0xEF);
                vga_wgfx(NULL, 0x30, temp);
        }

        vga_wgfx(NULL, 0x28, par->PanelVertCenterReg1);
        vga_wgfx(NULL, 0x29, par->PanelVertCenterReg2);
        vga_wgfx(NULL, 0x2a, par->PanelVertCenterReg3);

        if (info->fix.accel != FB_ACCEL_NEOMAGIC_NM2070) {
                vga_wgfx(NULL, 0x32, par->PanelVertCenterReg4);
                vga_wgfx(NULL, 0x33, par->PanelHorizCenterReg1);
                vga_wgfx(NULL, 0x34, par->PanelHorizCenterReg2);
                vga_wgfx(NULL, 0x35, par->PanelHorizCenterReg3);
        }

        if (info->fix.accel == FB_ACCEL_NEOMAGIC_NM2160)
                vga_wgfx(NULL, 0x36, par->PanelHorizCenterReg4);

        if (info->fix.accel == FB_ACCEL_NEOMAGIC_NM2200 ||
            info->fix.accel == FB_ACCEL_NEOMAGIC_NM2230 ||
            info->fix.accel == FB_ACCEL_NEOMAGIC_NM2360 ||
            info->fix.accel == FB_ACCEL_NEOMAGIC_NM2380) {
                vga_wgfx(NULL, 0x36, par->PanelHorizCenterReg4);
                vga_wgfx(NULL, 0x37, par->PanelVertCenterReg5);
                vga_wgfx(NULL, 0x38, par->PanelHorizCenterReg5);

                clock_hi = 1;
        }

        /* Program VCLK3 if needed. */
        if (par->ProgramVCLK && ((vga_rgfx(NULL, 0x9B) != par->VCLK3NumeratorLow)
                                 || (vga_rgfx(NULL, 0x9F) != par->VCLK3Denominator)
                                 || (clock_hi && ((vga_rgfx(NULL, 0x8F) & ~0x0f)
                                                  != (par->VCLK3NumeratorHigh &
                                                      ~0x0F))))) {
                vga_wgfx(NULL, 0x9B, par->VCLK3NumeratorLow);
                if (clock_hi) {
                        temp = vga_rgfx(NULL, 0x8F);
                        temp &= 0x0F;   /* Save bits 3:0 */
                        temp |= (par->VCLK3NumeratorHigh & ~0x0F);
                        vga_wgfx(NULL, 0x8F, temp);
                }
                vga_wgfx(NULL, 0x9F, par->VCLK3Denominator);
        }

        if (par->biosMode)
                vga_wcrt(NULL, 0x23, par->biosMode);

        vga_wgfx(NULL, 0x93, 0xc0);     /* Gives 5x faster framebuffer writes !!! */

        /* Program vertical extension register */
        if (info->fix.accel == FB_ACCEL_NEOMAGIC_NM2200 ||
            info->fix.accel == FB_ACCEL_NEOMAGIC_NM2230 ||
            info->fix.accel == FB_ACCEL_NEOMAGIC_NM2360 ||
            info->fix.accel == FB_ACCEL_NEOMAGIC_NM2380) {
                vga_wcrt(NULL, 0x70, par->VerticalExt);
        }

        vgaHWProtect(0);        /* Turn on screen */

        /* Calling this also locks offset registers required in update_start */
        neoLock(&par->state);

        info->fix.line_length =
            info->var.xres_virtual * (info->var.bits_per_pixel >> 3);

        switch (info->fix.accel) {
                case FB_ACCEL_NEOMAGIC_NM2200:
                case FB_ACCEL_NEOMAGIC_NM2230: 
                case FB_ACCEL_NEOMAGIC_NM2360: 
                case FB_ACCEL_NEOMAGIC_NM2380: 
                        neo2200_accel_init(info, &info->var);
                        break;
                default:
                        break;
        }       
        return 0;
}

/*
 *    Pan or Wrap the Display
 */
static int neofb_pan_display(struct fb_var_screeninfo *var,
                             struct fb_info *info)
{
        struct neofb_par *par = info->par;
        struct vgastate *state = &par->state;
        int oldExtCRTDispAddr;
        int Base;

        DBG("neofb_update_start");

        Base = (var->yoffset * info->var.xres_virtual + var->xoffset) >> 2;
        Base *= (info->var.bits_per_pixel + 7) / 8;

        neoUnlock();

        /*
         * These are the generic starting address registers.
         */
        vga_wcrt(state->vgabase, 0x0C, (Base & 0x00FF00) >> 8);
        vga_wcrt(state->vgabase, 0x0D, (Base & 0x00FF));

        /*
         * Make sure we don't clobber some other bits that might already
         * have been set. NOTE: NM2200 has a writable bit 3, but it shouldn't
         * be needed.
         */
        oldExtCRTDispAddr = vga_rgfx(NULL, 0x0E);
        vga_wgfx(state->vgabase, 0x0E, (((Base >> 16) & 0x0f) | (oldExtCRTDispAddr & 0xf0)));

        neoLock(state);

        return 0;
}

static int neofb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
                           u_int transp, struct fb_info *fb)
{
        if (regno >= fb->cmap.len || regno > 255)
                return -EINVAL;

        if (fb->var.bits_per_pixel <= 8) {
                outb(regno, 0x3c8);

                outb(red >> 10, 0x3c9);
                outb(green >> 10, 0x3c9);
                outb(blue >> 10, 0x3c9);
        } else if (regno < 16) {
                switch (fb->var.bits_per_pixel) {
                case 16:
                        ((u32 *) fb->pseudo_palette)[regno] =
                                ((red & 0xf800)) | ((green & 0xfc00) >> 5) |
                                ((blue & 0xf800) >> 11);
                        break;
                case 24:
                        ((u32 *) fb->pseudo_palette)[regno] =
                                ((red & 0xff00) << 8) | ((green & 0xff00)) |
                                ((blue & 0xff00) >> 8);
                        break;
#ifdef NO_32BIT_SUPPORT_YET
                case 32:
                        ((u32 *) fb->pseudo_palette)[regno] =
                                ((transp & 0xff00) << 16) | ((red & 0xff00) << 8) |
                                ((green & 0xff00)) | ((blue & 0xff00) >> 8);
                        break;
#endif
                default:
                        return 1;
                }
        }

        return 0;
}

/*
 *    (Un)Blank the display.
 */
static int neofb_blank(int blank_mode, struct fb_info *info)
{
        /*
         *  Blank the screen if blank_mode != 0, else unblank.
         *  Return 0 if blanking succeeded, != 0 if un-/blanking failed due to
         *  e.g. a video mode which doesn't support it. Implements VESA suspend
         *  and powerdown modes for monitors, and backlight control on LCDs.
         *    blank_mode == 0: unblanked (backlight on)
         *    blank_mode == 1: blank (backlight on)
         *    blank_mode == 2: suspend vsync (backlight off)
         *    blank_mode == 3: suspend hsync (backlight off)
         *    blank_mode == 4: powerdown (backlight off)
         *
         *  wms...Enable VESA DPMS compatible powerdown mode
         *  run "setterm -powersave powerdown" to take advantage
         */
        struct neofb_par *par = info->par;
        int seqflags, lcdflags, dpmsflags, reg, tmpdisp;

        /*
         * Read back the register bits related to display configuration. They might
         * have been changed underneath the driver via Fn key stroke.
         */
        neoUnlock();
        tmpdisp = vga_rgfx(NULL, 0x20) & 0x03;
        neoLock(&par->state);

        /* In case we blank the screen, we want to store the possibly new
         * configuration in the driver. During un-blank, we re-apply this setting,
         * since the LCD bit will be cleared in order to switch off the backlight.
         */
        if (par->PanelDispCntlRegRead) {
                par->PanelDispCntlReg1 = tmpdisp;
        }
        par->PanelDispCntlRegRead = !blank_mode;

        switch (blank_mode) {
        case FB_BLANK_POWERDOWN:        /* powerdown - both sync lines down */
                seqflags = VGA_SR01_SCREEN_OFF; /* Disable sequencer */
                lcdflags = 0;                   /* LCD off */
                dpmsflags = NEO_GR01_SUPPRESS_HSYNC |
                            NEO_GR01_SUPPRESS_VSYNC;
#ifdef CONFIG_TOSHIBA
                /* Do we still need this ? */
                /* attempt to turn off backlight on toshiba; also turns off external */
                {
                        SMMRegisters regs;

                        regs.eax = 0xff00; /* HCI_SET */
                        regs.ebx = 0x0002; /* HCI_BACKLIGHT */
                        regs.ecx = 0x0000; /* HCI_DISABLE */
                        tosh_smm(&regs);
                }
#endif
                break;
        case FB_BLANK_HSYNC_SUSPEND:            /* hsync off */
                seqflags = VGA_SR01_SCREEN_OFF; /* Disable sequencer */
                lcdflags = 0;                   /* LCD off */
                dpmsflags = NEO_GR01_SUPPRESS_HSYNC;
                break;
        case FB_BLANK_VSYNC_SUSPEND:            /* vsync off */
                seqflags = VGA_SR01_SCREEN_OFF; /* Disable sequencer */
                lcdflags = 0;                   /* LCD off */
                dpmsflags = NEO_GR01_SUPPRESS_VSYNC;
                break;
        case FB_BLANK_NORMAL:           /* just blank screen (backlight stays on) */
                seqflags = VGA_SR01_SCREEN_OFF; /* Disable sequencer */
                /*
                 * During a blank operation with the LID shut, we might store "LCD off"
                 * by mistake. Due to timing issues, the BIOS may switch the lights
                 * back on, and we turn it back off once we "unblank".
                 *
                 * So here is an attempt to implement ">=" - if we are in the process
                 * of unblanking, and the LCD bit is unset in the driver but set in the
                 * register, we must keep it.
                 */
                lcdflags = ((par->PanelDispCntlReg1 | tmpdisp) & 0x02); /* LCD normal */
                dpmsflags = 0x00;       /* no hsync/vsync suppression */
                break;
        case FB_BLANK_UNBLANK:          /* unblank */
                seqflags = 0;                   /* Enable sequencer */
                lcdflags = ((par->PanelDispCntlReg1 | tmpdisp) & 0x02); /* LCD normal */
                dpmsflags = 0x00;       /* no hsync/vsync suppression */
#ifdef CONFIG_TOSHIBA
                /* Do we still need this ? */
                /* attempt to re-enable backlight/external on toshiba */
                {
                        SMMRegisters regs;

                        regs.eax = 0xff00; /* HCI_SET */
                        regs.ebx = 0x0002; /* HCI_BACKLIGHT */
                        regs.ecx = 0x0001; /* HCI_ENABLE */
                        tosh_smm(&regs);
                }
#endif
                break;
        default:        /* Anything else we don't understand; return 1 to tell
                         * fb_blank we didn't aactually do anything */
                return 1;
        }

        neoUnlock();
        reg = (vga_rseq(NULL, 0x01) & ~0x20) | seqflags;
        vga_wseq(NULL, 0x01, reg);
        reg = (vga_rgfx(NULL, 0x20) & ~0x02) | lcdflags;
        vga_wgfx(NULL, 0x20, reg);
        reg = (vga_rgfx(NULL, 0x01) & ~0xF0) | 0x80 | dpmsflags;
        vga_wgfx(NULL, 0x01, reg);
        neoLock(&par->state);
        return 0;
}

static void
neo2200_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
{
        struct neofb_par *par = info->par;
        u_long dst, rop;

        dst = rect->dx + rect->dy * info->var.xres_virtual;
        rop = rect->rop ? 0x060000 : 0x0c0000;

        neo2200_wait_fifo(info, 4);

        /* set blt control */
        writel(NEO_BC3_FIFO_EN |
               NEO_BC0_SRC_IS_FG | NEO_BC3_SKIP_MAPPING |
               //               NEO_BC3_DST_XY_ADDR  |
               //               NEO_BC3_SRC_XY_ADDR  |
               rop, &par->neo2200->bltCntl);

        switch (info->var.bits_per_pixel) {
        case 8:
                writel(rect->color, &par->neo2200->fgColor);
                break;
        case 16:
        case 24:
                writel(((u32 *) (info->pseudo_palette))[rect->color],
                       &par->neo2200->fgColor);
                break;
        }

        writel(dst * ((info->var.bits_per_pixel + 7) >> 3),
               &par->neo2200->dstStart);
        writel((rect->height << 16) | (rect->width & 0xffff),
               &par->neo2200->xyExt);
}

static void
neo2200_copyarea(struct fb_info *info, const struct fb_copyarea *area)
{
        u32 sx = area->sx, sy = area->sy, dx = area->dx, dy = area->dy;
        struct neofb_par *par = info->par;
        u_long src, dst, bltCntl;

        bltCntl = NEO_BC3_FIFO_EN | NEO_BC3_SKIP_MAPPING | 0x0C0000;

        if ((dy > sy) || ((dy == sy) && (dx > sx))) {
                /* Start with the lower right corner */
                sy += (area->height - 1);
                dy += (area->height - 1);
                sx += (area->width - 1);
                dx += (area->width - 1);

                bltCntl |= NEO_BC0_X_DEC | NEO_BC0_DST_Y_DEC | NEO_BC0_SRC_Y_DEC;
        }

        src = sx * (info->var.bits_per_pixel >> 3) + sy*info->fix.line_length;
        dst = dx * (info->var.bits_per_pixel >> 3) + dy*info->fix.line_length;

        neo2200_wait_fifo(info, 4);

        /* set blt control */
        writel(bltCntl, &par->neo2200->bltCntl);

        writel(src, &par->neo2200->srcStart);
        writel(dst, &par->neo2200->dstStart);
        writel((area->height << 16) | (area->width & 0xffff),
               &par->neo2200->xyExt);
}

static void
neo2200_imageblit(struct fb_info *info, const struct fb_image *image)
{
        struct neofb_par *par = info->par;
        int s_pitch = (image->width * image->depth + 7) >> 3;
        int scan_align = info->pixmap.scan_align - 1;
        int buf_align = info->pixmap.buf_align - 1;
        int bltCntl_flags, d_pitch, data_len;

        // The data is padded for the hardware
        d_pitch = (s_pitch + scan_align) & ~scan_align;
        data_len = ((d_pitch * image->height) + buf_align) & ~buf_align;

        neo2200_sync(info);

        if (image->depth == 1) {
                if (info->var.bits_per_pixel == 24 && image->width < 16) {
                        /* FIXME. There is a bug with accelerated color-expanded
                         * transfers in 24 bit mode if the image being transferred
                         * is less than 16 bits wide. This is due to insufficient
                         * padding when writing the image. We need to adjust
                         * struct fb_pixmap. Not yet done. */
                        cfb_imageblit(info, image);
                        return;
                }
                bltCntl_flags = NEO_BC0_SRC_MONO;
        } else if (image->depth == info->var.bits_per_pixel) {
                bltCntl_flags = 0;
        } else {
                /* We don't currently support hardware acceleration if image
                 * depth is different from display */
                cfb_imageblit(info, image);
                return;
        }

        switch (info->var.bits_per_pixel) {
        case 8:
                writel(image->fg_color, &par->neo2200->fgColor);
                writel(image->bg_color, &par->neo2200->bgColor);
                break;
        case 16:
        case 24:
                writel(((u32 *) (info->pseudo_palette))[image->fg_color],
                       &par->neo2200->fgColor);
                writel(((u32 *) (info->pseudo_palette))[image->bg_color],
                       &par->neo2200->bgColor);
                break;
        }

        writel(NEO_BC0_SYS_TO_VID |
                NEO_BC3_SKIP_MAPPING | bltCntl_flags |
                // NEO_BC3_DST_XY_ADDR |
                0x0c0000, &par->neo2200->bltCntl);

        writel(0, &par->neo2200->srcStart);
//      par->neo2200->dstStart = (image->dy << 16) | (image->dx & 0xffff);
        writel(((image->dx & 0xffff) * (info->var.bits_per_pixel >> 3) +
                image->dy * info->fix.line_length), &par->neo2200->dstStart);
        writel((image->height << 16) | (image->width & 0xffff),
               &par->neo2200->xyExt);

        memcpy_toio(par->mmio_vbase + 0x100000, image->data, data_len);
}

static void
neofb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
{
        switch (info->fix.accel) {
                case FB_ACCEL_NEOMAGIC_NM2200:
                case FB_ACCEL_NEOMAGIC_NM2230: 
                case FB_ACCEL_NEOMAGIC_NM2360: 
                case FB_ACCEL_NEOMAGIC_NM2380:
                        neo2200_fillrect(info, rect);
                        break;
                default:
                        cfb_fillrect(info, rect);
                        break;
        }       
}

static void
neofb_copyarea(struct fb_info *info, const struct fb_copyarea *area)
{
        switch (info->fix.accel) {
                case FB_ACCEL_NEOMAGIC_NM2200:
                case FB_ACCEL_NEOMAGIC_NM2230: 
                case FB_ACCEL_NEOMAGIC_NM2360: 
                case FB_ACCEL_NEOMAGIC_NM2380: 
                        neo2200_copyarea(info, area);
                        break;
                default:
                        cfb_copyarea(info, area);
                        break;
        }       
}

static void
neofb_imageblit(struct fb_info *info, const struct fb_image *image)
{
        switch (info->fix.accel) {
                case FB_ACCEL_NEOMAGIC_NM2200:
                case FB_ACCEL_NEOMAGIC_NM2230:
                case FB_ACCEL_NEOMAGIC_NM2360:
                case FB_ACCEL_NEOMAGIC_NM2380:
                        neo2200_imageblit(info, image);
                        break;
                default:
                        cfb_imageblit(info, image);
                        break;
        }
}

static int 
neofb_sync(struct fb_info *info)
{
        switch (info->fix.accel) {
                case FB_ACCEL_NEOMAGIC_NM2200:
                case FB_ACCEL_NEOMAGIC_NM2230: 
                case FB_ACCEL_NEOMAGIC_NM2360: 
                case FB_ACCEL_NEOMAGIC_NM2380: 
                        neo2200_sync(info);
                        break;
                default:
                        break;
        }
        return 0;               
}

/*
static void
neofb_draw_cursor(struct fb_info *info, u8 *dst, u8 *src, unsigned int width)
{
        //memset_io(info->sprite.addr, 0xff, 1);
}

static int
neofb_cursor(struct fb_info *info, struct fb_cursor *cursor)
{
        struct neofb_par *par = (struct neofb_par *) info->par;

        * Disable cursor *
        write_le32(NEOREG_CURSCNTL, ~NEO_CURS_ENABLE, par);

        if (cursor->set & FB_CUR_SETPOS) {
                u32 x = cursor->image.dx;
                u32 y = cursor->image.dy;

                info->cursor.image.dx = x;
                info->cursor.image.dy = y;
                write_le32(NEOREG_CURSX, x, par);
                write_le32(NEOREG_CURSY, y, par);
        }

        if (cursor->set & FB_CUR_SETSIZE) {
                info->cursor.image.height = cursor->image.height;
                info->cursor.image.width = cursor->image.width;
        }

        if (cursor->set & FB_CUR_SETHOT)
                info->cursor.hot = cursor->hot;

        if (cursor->set & FB_CUR_SETCMAP) {
                if (cursor->image.depth == 1) {
                        u32 fg = cursor->image.fg_color;
                        u32 bg = cursor->image.bg_color;

                        info->cursor.image.fg_color = fg;
                        info->cursor.image.bg_color = bg;

                        fg = ((fg & 0xff0000) >> 16) | ((fg & 0xff) << 16) | (fg & 0xff00);
                        bg = ((bg & 0xff0000) >> 16) | ((bg & 0xff) << 16) | (bg & 0xff00);
                        write_le32(NEOREG_CURSFGCOLOR, fg, par);
                        write_le32(NEOREG_CURSBGCOLOR, bg, par);
                }
        }

        if (cursor->set & FB_CUR_SETSHAPE)
                fb_load_cursor_image(info);

        if (info->cursor.enable)
                write_le32(NEOREG_CURSCNTL, NEO_CURS_ENABLE, par);
        return 0;
}
*/

static struct fb_ops neofb_ops = {
        .owner          = THIS_MODULE,
        .fb_open        = neofb_open,
        .fb_release     = neofb_release,
        .fb_check_var   = neofb_check_var,
        .fb_set_par     = neofb_set_par,
        .fb_setcolreg   = neofb_setcolreg,
        .fb_pan_display = neofb_pan_display,
        .fb_blank       = neofb_blank,
        .fb_sync        = neofb_sync,
        .fb_fillrect    = neofb_fillrect,
        .fb_copyarea    = neofb_copyarea,
        .fb_imageblit   = neofb_imageblit,
};

/* --------------------------------------------------------------------- */

static struct fb_videomode mode800x480 = {
        .xres           = 800,
        .yres           = 480,
        .pixclock       = 25000,
        .left_margin    = 88,
        .right_margin   = 40,
        .upper_margin   = 23,
        .lower_margin   = 1,
        .hsync_len      = 128,
        .vsync_len      = 4,
        .sync           = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
        .vmode          = FB_VMODE_NONINTERLACED
};

static int neo_map_mmio(struct fb_info *info, struct pci_dev *dev)
{
        struct neofb_par *par = info->par;

        DBG("neo_map_mmio");

        switch (info->fix.accel) {
                case FB_ACCEL_NEOMAGIC_NM2070:
                        info->fix.mmio_start = pci_resource_start(dev, 0)+
                                0x100000;
                        break;
                case FB_ACCEL_NEOMAGIC_NM2090:
                case FB_ACCEL_NEOMAGIC_NM2093:
                        info->fix.mmio_start = pci_resource_start(dev, 0)+
                                0x200000;
                        break;
                case FB_ACCEL_NEOMAGIC_NM2160:
                case FB_ACCEL_NEOMAGIC_NM2097:
                case FB_ACCEL_NEOMAGIC_NM2200:
                case FB_ACCEL_NEOMAGIC_NM2230:
                case FB_ACCEL_NEOMAGIC_NM2360:
                case FB_ACCEL_NEOMAGIC_NM2380:
                        info->fix.mmio_start = pci_resource_start(dev, 1);
                        break;
                default:
                        info->fix.mmio_start = pci_resource_start(dev, 0);
        }
        info->fix.mmio_len = MMIO_SIZE;

        if (!request_mem_region
            (info->fix.mmio_start, MMIO_SIZE, "memory mapped I/O")) {
                printk("neofb: memory mapped IO in use\n");
                return -EBUSY;
        }

        par->mmio_vbase = ioremap(info->fix.mmio_start, MMIO_SIZE);
        if (!par->mmio_vbase) {
                printk("neofb: unable to map memory mapped IO\n");
                release_mem_region(info->fix.mmio_start,
                                   info->fix.mmio_len);
                return -ENOMEM;
        } else
                printk(KERN_INFO "neofb: mapped io at %p\n",
                       par->mmio_vbase);
        return 0;
}

static void neo_unmap_mmio(struct fb_info *info)
{
        struct neofb_par *par = info->par;

        DBG("neo_unmap_mmio");

        iounmap(par->mmio_vbase);
        par->mmio_vbase = NULL;

        release_mem_region(info->fix.mmio_start,
                           info->fix.mmio_len);
}

static int neo_map_video(struct fb_info *info, struct pci_dev *dev,
                         int video_len)
{
        //unsigned long addr;

        DBG("neo_map_video");

        info->fix.smem_start = pci_resource_start(dev, 0);
        info->fix.smem_len = video_len;

        if (!request_mem_region(info->fix.smem_start, info->fix.smem_len,
                                "frame buffer")) {
                printk("neofb: frame buffer in use\n");
                return -EBUSY;
        }

        info->screen_base =
            ioremap(info->fix.smem_start, info->fix.smem_len);
        if (!info->screen_base) {
                printk("neofb: unable to map screen memory\n");
                release_mem_region(info->fix.smem_start,
                                   info->fix.smem_len);
                return -ENOMEM;
        } else
                printk(KERN_INFO "neofb: mapped framebuffer at %p\n",
                       info->screen_base);

#ifdef CONFIG_MTRR
        ((struct neofb_par *)(info->par))->mtrr =
                mtrr_add(info->fix.smem_start, pci_resource_len(dev, 0),
                                MTRR_TYPE_WRCOMB, 1);
#endif

        /* Clear framebuffer, it's all white in memory after boot */
        memset_io(info->screen_base, 0, info->fix.smem_len);

        /* Allocate Cursor drawing pad.
        info->fix.smem_len -= PAGE_SIZE;
        addr = info->fix.smem_start + info->fix.smem_len;
        write_le32(NEOREG_CURSMEMPOS, ((0x000f & (addr >> 10)) << 8) |
                                        ((0x0ff0 & (addr >> 10)) >> 4), par);
        addr = (unsigned long) info->screen_base + info->fix.smem_len;
        info->sprite.addr = (u8 *) addr; */
        return 0;
}

static void neo_unmap_video(struct fb_info *info)
{
        DBG("neo_unmap_video");

#ifdef CONFIG_MTRR
        {
                struct neofb_par *par = info->par;

                mtrr_del(par->mtrr, info->fix.smem_start,
                         info->fix.smem_len);
        }
#endif
        iounmap(info->screen_base);
        info->screen_base = NULL;

        release_mem_region(info->fix.smem_start,
                           info->fix.smem_len);
}

static int neo_scan_monitor(struct fb_info *info)
{
        struct neofb_par *par = info->par;
        unsigned char type, display;
        int w;

        // Eventually we will have i2c support.
        info->monspecs.modedb = kmalloc(sizeof(struct fb_videomode), GFP_KERNEL);
        if (!info->monspecs.modedb)
                return -ENOMEM;
        info->monspecs.modedb_len = 1;

        /* Determine the panel type */
        vga_wgfx(NULL, 0x09, 0x26);
        type = vga_rgfx(NULL, 0x21);
        display = vga_rgfx(NULL, 0x20);
        if (!par->internal_display && !par->external_display) {
                par->internal_display = display & 2 || !(display & 3) ? 1 : 0;
                par->external_display = display & 1;
                printk (KERN_INFO "Autodetected %s display\n",
                        par->internal_display && par->external_display ? "simultaneous" :
                        par->internal_display ? "internal" : "external");
        }

        /* Determine panel width -- used in NeoValidMode. */
        w = vga_rgfx(NULL, 0x20);
        vga_wgfx(NULL, 0x09, 0x00);
        switch ((w & 0x18) >> 3) {
        case 0x00:
                // 640x480@60
                par->NeoPanelWidth = 640;
                par->NeoPanelHeight = 480;
                memcpy(info->monspecs.modedb, &vesa_modes[3], sizeof(struct fb_videomode));
                break;
        case 0x01:
                par->NeoPanelWidth = 800;
                if (par->libretto) {
                        par->NeoPanelHeight = 480;
                        memcpy(info->monspecs.modedb, &mode800x480, sizeof(struct fb_videomode));
                } else {
                        // 800x600@60
                        par->NeoPanelHeight = 600;
                        memcpy(info->monspecs.modedb, &vesa_modes[8], sizeof(struct fb_videomode));
                }
                break;
        case 0x02:
                // 1024x768@60
                par->NeoPanelWidth = 1024;
                par->NeoPanelHeight = 768;
                memcpy(info->monspecs.modedb, &vesa_modes[13], sizeof(struct fb_videomode));
                break;
        case 0x03:
                /* 1280x1024@60 panel support needs to be added */
#ifdef NOT_DONE
                par->NeoPanelWidth = 1280;
                par->NeoPanelHeight = 1024;
                memcpy(info->monspecs.modedb, &vesa_modes[20], sizeof(struct fb_videomode));
                break;
#else
                printk(KERN_ERR
                       "neofb: Only 640x480, 800x600/480 and 1024x768 panels are currently supported\n");
                return -1;
#endif
        default:
                // 640x480@60
                par->NeoPanelWidth = 640;
                par->NeoPanelHeight = 480;
                memcpy(info->monspecs.modedb, &vesa_modes[3], sizeof(struct fb_videomode));
                break;
        }

        printk(KERN_INFO "Panel is a %dx%d %s %s display\n",
               par->NeoPanelWidth,
               par->NeoPanelHeight,
               (type & 0x02) ? "color" : "monochrome",
               (type & 0x10) ? "TFT" : "dual scan");
        return 0;
}

static int neo_init_hw(struct fb_info *info)
{
        struct neofb_par *par = info->par;
        int videoRam = 896;
        int maxClock = 65000;
        int CursorMem = 1024;
        int CursorOff = 0x100;

        DBG("neo_init_hw");

        neoUnlock();

#if 0
        printk(KERN_DEBUG "--- Neo extended register dump ---\n");
        for (int w = 0; w < 0x85; w++)
                printk(KERN_DEBUG "CR %p: %p\n", (void *) w,
                       (void *) vga_rcrt(NULL, w));
        for (int w = 0; w < 0xC7; w++)
                printk(KERN_DEBUG "GR %p: %p\n", (void *) w,
                       (void *) vga_rgfx(NULL, w));
#endif
        switch (info->fix.accel) {
        case FB_ACCEL_NEOMAGIC_NM2070:
                videoRam = 896;
                maxClock = 65000;
                break;
        case FB_ACCEL_NEOMAGIC_NM2090:
        case FB_ACCEL_NEOMAGIC_NM2093:
        case FB_ACCEL_NEOMAGIC_NM2097:
                videoRam = 1152;
                maxClock = 80000;
                break;
        case FB_ACCEL_NEOMAGIC_NM2160:
                videoRam = 2048;
                maxClock = 90000;
                break;
        case FB_ACCEL_NEOMAGIC_NM2200:
                videoRam = 2560;
                maxClock = 110000;
                break;
        case FB_ACCEL_NEOMAGIC_NM2230:
                videoRam = 3008;
                maxClock = 110000;
                break;
        case FB_ACCEL_NEOMAGIC_NM2360:
                videoRam = 4096;
                maxClock = 110000;
                break;
        case FB_ACCEL_NEOMAGIC_NM2380:
                videoRam = 6144;
                maxClock = 110000;
                break;
        }
        switch (info->fix.accel) {
        case FB_ACCEL_NEOMAGIC_NM2070:
        case FB_ACCEL_NEOMAGIC_NM2090:
        case FB_ACCEL_NEOMAGIC_NM2093:
                CursorMem = 2048;
                CursorOff = 0x100;
                break;
        case FB_ACCEL_NEOMAGIC_NM2097:
        case FB_ACCEL_NEOMAGIC_NM2160:
                CursorMem = 1024;
                CursorOff = 0x100;
                break;
        case FB_ACCEL_NEOMAGIC_NM2200:
        case FB_ACCEL_NEOMAGIC_NM2230:
        case FB_ACCEL_NEOMAGIC_NM2360:
        case FB_ACCEL_NEOMAGIC_NM2380:
                CursorMem = 1024;
                CursorOff = 0x1000;

                par->neo2200 = (Neo2200 __iomem *) par->mmio_vbase;
                break;
        }
/*
        info->sprite.size = CursorMem;
        info->sprite.scan_align = 1;
        info->sprite.buf_align = 1;
        info->sprite.flags = FB_PIXMAP_IO;
        info->sprite.outbuf = neofb_draw_cursor;
*/
        par->maxClock = maxClock;
        par->cursorOff = CursorOff;
        return videoRam * 1024;
}


static struct fb_info *neo_alloc_fb_info(struct pci_dev *dev,
                                         const struct pci_device_id *id)
{
        struct fb_info *info;
        struct neofb_par *par;

        info = framebuffer_alloc(sizeof(struct neofb_par), &dev->dev);

        if (!info)
                return NULL;

        par = info->par;

        info->fix.accel = id->driver_data;

        par->pci_burst = !nopciburst;
        par->lcd_stretch = !nostretch;
        par->libretto = libretto;

        par->internal_display = internal;
        par->external_display = external;
        info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN;

        switch (info->fix.accel) {
        case FB_ACCEL_NEOMAGIC_NM2070:
                snprintf(info->fix.id, sizeof(info->fix.id),
                                "MagicGraph 128");
                break;
        case FB_ACCEL_NEOMAGIC_NM2090:
                snprintf(info->fix.id, sizeof(info->fix.id),
                                "MagicGraph 128V");
                break;
        case FB_ACCEL_NEOMAGIC_NM2093:
                snprintf(info->fix.id, sizeof(info->fix.id),
                                "MagicGraph 128ZV");
                break;
        case FB_ACCEL_NEOMAGIC_NM2097:
                snprintf(info->fix.id, sizeof(info->fix.id),
                                "MagicGraph 128ZV+");
                break;
        case FB_ACCEL_NEOMAGIC_NM2160:
                snprintf(info->fix.id, sizeof(info->fix.id),
                                "MagicGraph 128XD");
                break;
        case FB_ACCEL_NEOMAGIC_NM2200:
                snprintf(info->fix.id, sizeof(info->fix.id),
                                "MagicGraph 256AV");
                info->flags |= FBINFO_HWACCEL_IMAGEBLIT |
                               FBINFO_HWACCEL_COPYAREA |
                               FBINFO_HWACCEL_FILLRECT;
                break;
        case FB_ACCEL_NEOMAGIC_NM2230:
                snprintf(info->fix.id, sizeof(info->fix.id),
                                "MagicGraph 256AV+");
                info->flags |= FBINFO_HWACCEL_IMAGEBLIT |
                               FBINFO_HWACCEL_COPYAREA |
                               FBINFO_HWACCEL_FILLRECT;
                break;
        case FB_ACCEL_NEOMAGIC_NM2360:
                snprintf(info->fix.id, sizeof(info->fix.id),

                                "MagicGraph 256ZX");
                info->flags |= FBINFO_HWACCEL_IMAGEBLIT |
                               FBINFO_HWACCEL_COPYAREA |
                               FBINFO_HWACCEL_FILLRECT;
                break;
        case FB_ACCEL_NEOMAGIC_NM2380:
                snprintf(info->fix.id, sizeof(info->fix.id),
                                "MagicGraph 256XL+");
                info->flags |= FBINFO_HWACCEL_IMAGEBLIT |
                               FBINFO_HWACCEL_COPYAREA |
                               FBINFO_HWACCEL_FILLRECT;
                break;
        }

        info->fix.type = FB_TYPE_PACKED_PIXELS;
        info->fix.type_aux = 0;
        info->fix.xpanstep = 0;
        info->fix.ypanstep = 4;
        info->fix.ywrapstep = 0;
        info->fix.accel = id->driver_data;

        info->fbops = &neofb_ops;
        info->pseudo_palette = par->palette;
        return info;
}

static void neo_free_fb_info(struct fb_info *info)
{
        if (info) {
                /*
                 * Free the colourmap
                 */
                fb_dealloc_cmap(&info->cmap);
                framebuffer_release(info);
        }
}

/* --------------------------------------------------------------------- */

static int neofb_probe(struct pci_dev *dev, const struct pci_device_id *id)
{
        struct fb_info *info;
        u_int h_sync, v_sync;
        int video_len, err;

        DBG("neofb_probe");

        err = pci_enable_device(dev);
        if (err)
                return err;

        err = -ENOMEM;
        info = neo_alloc_fb_info(dev, id);
        if (!info)
                return err;

        err = neo_map_mmio(info, dev);
        if (err)
                goto err_map_mmio;

        err = neo_scan_monitor(info);
        if (err)
                goto err_scan_monitor;

        video_len = neo_init_hw(info);
        if (video_len < 0) {
                err = video_len;
                goto err_init_hw;
        }

        err = neo_map_video(info, dev, video_len);
        if (err)
                goto err_init_hw;

        if (!fb_find_mode(&info->var, info, mode_option, NULL, 0,
                        info->monspecs.modedb, 16)) {
                printk(KERN_ERR "neofb: Unable to find usable video mode.\n");
                goto err_map_video;
        }

        /*
         * Calculate the hsync and vsync frequencies.  Note that
         * we split the 1e12 constant up so that we can preserve
         * the precision and fit the results into 32-bit registers.
         *  (1953125000 * 512 = 1e12)
         */
        h_sync = 1953125000 / info->var.pixclock;
        h_sync =
            h_sync * 512 / (info->var.xres + info->var.left_margin +
                            info->var.right_margin + info->var.hsync_len);
        v_sync =
            h_sync / (info->var.yres + info->var.upper_margin +
                      info->var.lower_margin + info->var.vsync_len);

        printk(KERN_INFO "neofb v" NEOFB_VERSION
               ": %dkB VRAM, using %dx%d, %d.%03dkHz, %dHz\n",
               info->fix.smem_len >> 10, info->var.xres,
               info->var.yres, h_sync / 1000, h_sync % 1000, v_sync);

        if (fb_alloc_cmap(&info->cmap, 256, 0) < 0)
                goto err_map_video;

        err = register_framebuffer(info);
        if (err < 0)
                goto err_reg_fb;

        printk(KERN_INFO "fb%d: %s frame buffer device\n",
               info->node, info->fix.id);

        /*
         * Our driver data
         */
        pci_set_drvdata(dev, info);
        return 0;

err_reg_fb:
        fb_dealloc_cmap(&info->cmap);
err_map_video:
        neo_unmap_video(info);
err_init_hw:
        fb_destroy_modedb(info->monspecs.modedb);
err_scan_monitor:
        neo_unmap_mmio(info);
err_map_mmio:
        neo_free_fb_info(info);
        return err;
}

static void neofb_remove(struct pci_dev *dev)
{
        struct fb_info *info = pci_get_drvdata(dev);

        DBG("neofb_remove");

        if (info) {
                /*
                 * If unregister_framebuffer fails, then
                 * we will be leaving hooks that could cause
                 * oopsen laying around.
                 */
                if (unregister_framebuffer(info))
                        printk(KERN_WARNING
                               "neofb: danger danger!  Oopsen imminent!\n");

                neo_unmap_video(info);
                fb_destroy_modedb(info->monspecs.modedb);
                neo_unmap_mmio(info);
                neo_free_fb_info(info);

                /*
                 * Ensure that the driver data is no longer
                 * valid.
                 */
                pci_set_drvdata(dev, NULL);
        }
}

static struct pci_device_id neofb_devices[] = {
        {PCI_VENDOR_ID_NEOMAGIC, PCI_CHIP_NM2070,
         PCI_ANY_ID, PCI_ANY_ID, 0, 0, FB_ACCEL_NEOMAGIC_NM2070},

        {PCI_VENDOR_ID_NEOMAGIC, PCI_CHIP_NM2090,
         PCI_ANY_ID, PCI_ANY_ID, 0, 0, FB_ACCEL_NEOMAGIC_NM2090},

        {PCI_VENDOR_ID_NEOMAGIC, PCI_CHIP_NM2093,
         PCI_ANY_ID, PCI_ANY_ID, 0, 0, FB_ACCEL_NEOMAGIC_NM2093},

        {PCI_VENDOR_ID_NEOMAGIC, PCI_CHIP_NM2097,
         PCI_ANY_ID, PCI_ANY_ID, 0, 0, FB_ACCEL_NEOMAGIC_NM2097},

        {PCI_VENDOR_ID_NEOMAGIC, PCI_CHIP_NM2160,
         PCI_ANY_ID, PCI_ANY_ID, 0, 0, FB_ACCEL_NEOMAGIC_NM2160},

        {PCI_VENDOR_ID_NEOMAGIC, PCI_CHIP_NM2200,
         PCI_ANY_ID, PCI_ANY_ID, 0, 0, FB_ACCEL_NEOMAGIC_NM2200},

        {PCI_VENDOR_ID_NEOMAGIC, PCI_CHIP_NM2230,
         PCI_ANY_ID, PCI_ANY_ID, 0, 0, FB_ACCEL_NEOMAGIC_NM2230},

        {PCI_VENDOR_ID_NEOMAGIC, PCI_CHIP_NM2360,
         PCI_ANY_ID, PCI_ANY_ID, 0, 0, FB_ACCEL_NEOMAGIC_NM2360},

        {PCI_VENDOR_ID_NEOMAGIC, PCI_CHIP_NM2380,
         PCI_ANY_ID, PCI_ANY_ID, 0, 0, FB_ACCEL_NEOMAGIC_NM2380},

        {0, 0, 0, 0, 0, 0, 0}
};

MODULE_DEVICE_TABLE(pci, neofb_devices);

static struct pci_driver neofb_driver = {
        .name =         "neofb",
        .id_table =     neofb_devices,
        .probe =        neofb_probe,
        .remove =       neofb_remove,
};

/* ************************* init in-kernel code ************************** */

#ifndef MODULE
static int __init neofb_setup(char *options)
{
        char *this_opt;

        DBG("neofb_setup");

        if (!options || !*options)
                return 0;

        while ((this_opt = strsep(&options, ",")) != NULL) {
                if (!*this_opt)
                        continue;

                if (!strncmp(this_opt, "internal", 8))
                        internal = 1;
                else if (!strncmp(this_opt, "external", 8))
                        external = 1;
                else if (!strncmp(this_opt, "nostretch", 9))
                        nostretch = 1;
                else if (!strncmp(this_opt, "nopciburst", 10))
                        nopciburst = 1;
                else if (!strncmp(this_opt, "libretto", 8))
                        libretto = 1;
                else
                        mode_option = this_opt;
        }
        return 0;
}
#endif  /*  MODULE  */

static int __init neofb_init(void)
{
#ifndef MODULE
        char *option = NULL;

        if (fb_get_options("neofb", &option))
                return -ENODEV;
        neofb_setup(option);
#endif
        return pci_register_driver(&neofb_driver);
}

module_init(neofb_init);

#ifdef MODULE
static void __exit neofb_exit(void)
{
        pci_unregister_driver(&neofb_driver);
}

module_exit(neofb_exit);
#endif                          /* MODULE */