/*
 *  linux/drivers/video/kyro/fbdev.c
 *
 *  Copyright (C) 2002 STMicroelectronics
 *  Copyright (C) 2003, 2004 Paul Mundt
 *
 * 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.
 */

#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/delay.h>
#include <linux/fb.h>
#include <linux/ioctl.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <asm/io.h>
#include <linux/uaccess.h>

#include <video/kyro.h>

#include "STG4000Reg.h"
#include "STG4000Interface.h"

/*
 * PCI Definitions
 */
#define PCI_VENDOR_ID_ST        0x104a
#define PCI_DEVICE_ID_STG4000   0x0010

#define KHZ2PICOS(a) (1000000000UL/(a))

/****************************************************************************/
static struct fb_fix_screeninfo kyro_fix = {
        .id             = "ST Kyro",
        .type           = FB_TYPE_PACKED_PIXELS,
        .visual         = FB_VISUAL_TRUECOLOR,
        .accel          = FB_ACCEL_NONE,
};

static const struct fb_var_screeninfo kyro_var = {
        /* 640x480, 16bpp @ 60 Hz */
        .xres           = 640,
        .yres           = 480,
        .xres_virtual   = 640,
        .yres_virtual   = 480,
        .bits_per_pixel = 16,
        .red            = { 11, 5, 0 },
        .green          = {  5, 6, 0 },
        .blue           = {  0, 5, 0 },
        .activate       = FB_ACTIVATE_NOW,
        .height         = -1,
        .width          = -1,
        .pixclock       = KHZ2PICOS(25175),
        .left_margin    = 48,
        .right_margin   = 16,
        .upper_margin   = 33,
        .lower_margin   = 10,
        .hsync_len      = 96,
        .vsync_len      = 2,
        .vmode          = FB_VMODE_NONINTERLACED,
};

typedef struct {
        STG4000REG __iomem *pSTGReg;    /* Virtual address of PCI register region */
        u32 ulNextFreeVidMem;   /* Offset from start of vid mem to next free region */
        u32 ulOverlayOffset;    /* Offset from start of vid mem to overlay */
        u32 ulOverlayStride;    /* Interleaved YUV and 422 mode Y stride */
        u32 ulOverlayUVStride;  /* 422 mode U & V stride */
} device_info_t;

/* global graphics card info structure (one per card) */
static device_info_t deviceInfo;

static char *mode_option = NULL;
static int nopan = 0;
static int nowrap = 1;
static int nomtrr = 0;

/* PCI driver prototypes */
static int kyrofb_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
static void kyrofb_remove(struct pci_dev *pdev);

static struct fb_videomode kyro_modedb[] = {
        {
                /* 640x350 @ 85Hz */
                NULL, 85, 640, 350, KHZ2PICOS(31500),
                96, 32, 60, 32, 64, 3,
                FB_SYNC_HOR_HIGH_ACT, FB_VMODE_NONINTERLACED
        }, {
                /* 640x400 @ 85Hz */
                NULL, 85, 640, 400, KHZ2PICOS(31500),
                96, 32, 41, 1, 64, 3,
                FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
        }, {
                /* 720x400 @ 85Hz */
                NULL, 85, 720, 400, KHZ2PICOS(35500),
                108, 36, 42, 1, 72, 3,
                FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
        }, {
                /* 640x480 @ 60Hz */
                NULL, 60, 640, 480, KHZ2PICOS(25175),
                48, 16, 33, 10, 96, 2,
                0, FB_VMODE_NONINTERLACED
        }, {
                /* 640x480 @ 72Hz */
                NULL, 72, 640, 480, KHZ2PICOS(31500),
                128, 24, 28, 9, 40, 3,
                0, FB_VMODE_NONINTERLACED
        }, {
                /* 640x480 @ 75Hz */
                NULL, 75, 640, 480, KHZ2PICOS(31500),
                120, 16, 16, 1, 64, 3,
                0, FB_VMODE_NONINTERLACED
        }, {
                /* 640x480 @ 85Hz */
                NULL, 85, 640, 480, KHZ2PICOS(36000),
                80, 56, 25, 1, 56, 3,
                0, FB_VMODE_NONINTERLACED
        }, {
                /* 800x600 @ 56Hz */
                NULL, 56, 800, 600, KHZ2PICOS(36000),
                128, 24, 22, 1, 72, 2,
                FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
        }, {
                /* 800x600 @ 60Hz */
                NULL, 60, 800, 600, KHZ2PICOS(40000),
                88, 40, 23, 1, 128, 4,
                FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
        }, {
                /* 800x600 @ 72Hz */
                NULL, 72, 800, 600, KHZ2PICOS(50000),
                64, 56, 23, 37, 120, 6,
                FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
        }, {
                /* 800x600 @ 75Hz */
                NULL, 75, 800, 600, KHZ2PICOS(49500),
                160, 16, 21, 1, 80, 3,
                FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
        }, {
                /* 800x600 @ 85Hz */
                NULL, 85, 800, 600, KHZ2PICOS(56250),
                152, 32, 27, 1, 64, 3,
                FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
        }, {
                /* 1024x768 @ 60Hz */
                NULL, 60, 1024, 768, KHZ2PICOS(65000),
                160, 24, 29, 3, 136, 6,
                0, FB_VMODE_NONINTERLACED
        }, {
                /* 1024x768 @ 70Hz */
                NULL, 70, 1024, 768, KHZ2PICOS(75000),
                144, 24, 29, 3, 136, 6,
                0, FB_VMODE_NONINTERLACED
        }, {
                /* 1024x768 @ 75Hz */
                NULL, 75, 1024, 768, KHZ2PICOS(78750),
                176, 16, 28, 1, 96, 3,
                FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
        }, {
                /* 1024x768 @ 85Hz */
                NULL, 85, 1024, 768, KHZ2PICOS(94500),
                208, 48, 36, 1, 96, 3,
                FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
        }, {
                /* 1152x864 @ 75Hz */
                NULL, 75, 1152, 864, KHZ2PICOS(108000),
                256, 64, 32, 1, 128, 3,
                FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
        }, {
                /* 1280x960 @ 60Hz */
                NULL, 60, 1280, 960, KHZ2PICOS(108000),
                312, 96, 36, 1, 112, 3,
                FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
        }, {
                /* 1280x960 @ 85Hz */
                NULL, 85, 1280, 960, KHZ2PICOS(148500),
                224, 64, 47, 1, 160, 3,
                FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
        }, {
                /* 1280x1024 @ 60Hz */
                NULL, 60, 1280, 1024, KHZ2PICOS(108000),
                248, 48, 38, 1, 112, 3,
                FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
        }, {
                /* 1280x1024 @ 75Hz */
                NULL, 75, 1280, 1024, KHZ2PICOS(135000),
                248, 16, 38, 1, 144, 3,
                FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
        }, {
                /* 1280x1024 @ 85Hz */
                NULL, 85, 1280, 1024, KHZ2PICOS(157500),
                224, 64, 44, 1, 160, 3,
                FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
        }, {
                /* 1600x1200 @ 60Hz */
                NULL, 60, 1600, 1200, KHZ2PICOS(162000),
                304, 64, 46, 1, 192, 3,
                FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
        }, {
                /* 1600x1200 @ 65Hz */
                NULL, 65, 1600, 1200, KHZ2PICOS(175500),
                304, 64, 46, 1, 192, 3,
                FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
        }, {
                /* 1600x1200 @ 70Hz */
                NULL, 70, 1600, 1200, KHZ2PICOS(189000),
                304, 64, 46, 1, 192, 3,
                FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
        }, {
                /* 1600x1200 @ 75Hz */
                NULL, 75, 1600, 1200, KHZ2PICOS(202500),
                304, 64, 46, 1, 192, 3,
                FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
        }, {
                /* 1600x1200 @ 85Hz */
                NULL, 85, 1600, 1200, KHZ2PICOS(229500),
                304, 64, 46, 1, 192, 3,
                FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
        }, {
                /* 1792x1344 @ 60Hz */
                NULL, 60, 1792, 1344, KHZ2PICOS(204750),
                328, 128, 46, 1, 200, 3,
                FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
        }, {
                /* 1792x1344 @ 75Hz */
                NULL, 75, 1792, 1344, KHZ2PICOS(261000),
                352, 96, 69, 1, 216, 3,
                FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
        }, {
                /* 1856x1392 @ 60Hz */
                NULL, 60, 1856, 1392, KHZ2PICOS(218250),
                352, 96, 43, 1, 224, 3,
                FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
        }, {
                /* 1856x1392 @ 75Hz */
                NULL, 75, 1856, 1392, KHZ2PICOS(288000),
                352, 128, 104, 1, 224, 3,
                FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
        }, {
                /* 1920x1440 @ 60Hz */
                NULL, 60, 1920, 1440, KHZ2PICOS(234000),
                344, 128, 56, 1, 208, 3,
                FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
        }, {
                /* 1920x1440 @ 75Hz */
                NULL, 75, 1920, 1440, KHZ2PICOS(297000),
                352, 144, 56, 1, 224, 3,
                FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
        },
};
#define NUM_TOTAL_MODES ARRAY_SIZE(kyro_modedb)

/*
 * This needs to be kept ordered corresponding to kyro_modedb.
 */
enum {
        VMODE_640_350_85,
        VMODE_640_400_85,
        VMODE_720_400_85,
        VMODE_640_480_60,
        VMODE_640_480_72,
        VMODE_640_480_75,
        VMODE_640_480_85,
        VMODE_800_600_56,
        VMODE_800_600_60,
        VMODE_800_600_72,
        VMODE_800_600_75,
        VMODE_800_600_85,
        VMODE_1024_768_60,
        VMODE_1024_768_70,
        VMODE_1024_768_75,
        VMODE_1024_768_85,
        VMODE_1152_864_75,
        VMODE_1280_960_60,
        VMODE_1280_960_85,
        VMODE_1280_1024_60,
        VMODE_1280_1024_75,
        VMODE_1280_1024_85,
        VMODE_1600_1200_60,
        VMODE_1600_1200_65,
        VMODE_1600_1200_70,
        VMODE_1600_1200_75,
        VMODE_1600_1200_85,
        VMODE_1792_1344_60,
        VMODE_1792_1344_75,
        VMODE_1856_1392_60,
        VMODE_1856_1392_75,
        VMODE_1920_1440_60,
        VMODE_1920_1440_75,
};

/* Accessors */
static int kyro_dev_video_mode_set(struct fb_info *info)
{
        struct kyrofb_info *par = info->par;

        /* Turn off display */
        StopVTG(deviceInfo.pSTGReg);
        DisableRamdacOutput(deviceInfo.pSTGReg);

        /* Bring us out of VGA and into Hi-Res mode, if not already. */
        DisableVGA(deviceInfo.pSTGReg);

        if (InitialiseRamdac(deviceInfo.pSTGReg,
                             info->var.bits_per_pixel,
                             info->var.xres, info->var.yres,
                             par->HSP, par->VSP, &par->PIXCLK) < 0)
                return -EINVAL;

        SetupVTG(deviceInfo.pSTGReg, par);

        ResetOverlayRegisters(deviceInfo.pSTGReg);

        /* Turn on display in new mode */
        EnableRamdacOutput(deviceInfo.pSTGReg);
        StartVTG(deviceInfo.pSTGReg);

        deviceInfo.ulNextFreeVidMem = info->var.xres * info->var.yres *
                                      info->var.bits_per_pixel;
        deviceInfo.ulOverlayOffset = 0;

        return 0;
}

static int kyro_dev_overlay_create(u32 ulWidth,
                                   u32 ulHeight, int bLinear)
{
        u32 offset;
        u32 stride, uvStride;

        if (deviceInfo.ulOverlayOffset != 0)
                /*
                 * Can only create one overlay without resetting the card or
                 * changing display mode
                 */
                return -EINVAL;

        ResetOverlayRegisters(deviceInfo.pSTGReg);

        /* Overlays are addressed in multiples of 16bytes or 32bytes, so make
         * sure the start offset is on an appropriate boundary.
         */
        offset = deviceInfo.ulNextFreeVidMem;
        if ((offset & 0x1f) != 0) {
                offset = (offset + 32L) & 0xffffffE0L;
        }

        if (CreateOverlaySurface(deviceInfo.pSTGReg, ulWidth, ulHeight,
                                 bLinear, offset, &stride, &uvStride) < 0)
                return -EINVAL;

        deviceInfo.ulOverlayOffset = offset;
        deviceInfo.ulOverlayStride = stride;
        deviceInfo.ulOverlayUVStride = uvStride;
        deviceInfo.ulNextFreeVidMem = offset + (ulHeight * stride) + (ulHeight * 2 * uvStride);

        SetOverlayBlendMode(deviceInfo.pSTGReg, GLOBAL_ALPHA, 0xf, 0x0);

        return 0;
}

static int kyro_dev_overlay_viewport_set(u32 x, u32 y, u32 ulWidth, u32 ulHeight)
{
        if (deviceInfo.ulOverlayOffset == 0)
                /* probably haven't called CreateOverlay yet */
                return -EINVAL;

        if (ulWidth == 0 || ulWidth == 0xffffffff ||
            ulHeight == 0 || ulHeight == 0xffffffff ||
            (x < 2 && ulWidth + 2 == 0))
                return -EINVAL;

        /* Stop Ramdac Output */
        DisableRamdacOutput(deviceInfo.pSTGReg);

        SetOverlayViewPort(deviceInfo.pSTGReg,
                           x, y, x + ulWidth - 1, y + ulHeight - 1);

        EnableOverlayPlane(deviceInfo.pSTGReg);
        /* Start Ramdac Output */
        EnableRamdacOutput(deviceInfo.pSTGReg);

        return 0;
}

static inline unsigned long get_line_length(int x, int bpp)
{
        return (unsigned long)((((x*bpp)+31)&~31) >> 3);
}

static int kyrofb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
{
        struct kyrofb_info *par = info->par;

        if (!var->pixclock)
                return -EINVAL;

        if (var->bits_per_pixel != 16 && var->bits_per_pixel != 32) {
                printk(KERN_WARNING "kyrofb: depth not supported: %u\n", var->bits_per_pixel);
                return -EINVAL;
        }

        switch (var->bits_per_pixel) {
        case 16:
                var->red.offset = 11;
                var->red.length = 5;
                var->green.offset = 5;
                var->green.length = 6;
                var->blue.length = 5;
                break;
        case 32:
                var->transp.offset = 24;
                var->red.offset = 16;
                var->green.offset = 8;
                var->blue.offset = 0;

                var->red.length = 8;
                var->green.length = 8;
                var->blue.length = 8;
                var->transp.length = 8;
                break;
        }

        /* Height/Width of picture in mm */
        var->height = var->width = -1;

        /* Timing information. All values are in picoseconds */

        /* par->PIXCLK is in 100Hz units. Convert to picoseconds -
         * ensuring we do not exceed 32 bit precision
         */
        /*
         * XXX: Enabling this really screws over the pixclock value when we
         * read it back with fbset. As such, leaving this commented out appears
         * to do the right thing (at least for now) .. bearing in mind that we
         * have infact already done the KHZ2PICOS conversion in both the modedb
         * and kyro_var. -- PFM.
         */
//      var->pixclock = 1000000000 / (par->PIXCLK / 10);

        /* the header file claims we should use picoseconds
         * - nobody else does though, the all use pixels and lines
         * of h and v sizes. Both options here.
         */

        /*
         * If we're being called by __fb_try_mode(), then we don't want to
         * override any of the var settings that we've already parsed
         * from our modedb. -- PFM.
         */
        if ((var->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_TEST)
                return 0;

        var->left_margin = par->HBP;
        var->hsync_len = par->HST;
        var->right_margin = par->HFP;

        var->upper_margin = par->VBP;
        var->vsync_len = par->VST;
        var->lower_margin = par->VFP;

        if (par->HSP == 1)
                var->sync |= FB_SYNC_HOR_HIGH_ACT;
        if (par->VSP == 1)
                var->sync |= FB_SYNC_VERT_HIGH_ACT;

        return 0;
}

static int kyrofb_set_par(struct fb_info *info)
{
        struct kyrofb_info *par = info->par;
        unsigned long lineclock;
        unsigned long frameclock;

        /* Actual resolution */
        par->XRES = info->var.xres;
        par->YRES = info->var.yres;

        /* pixel depth */
        par->PIXDEPTH = info->var.bits_per_pixel;

        /* Refresh rate */
        /* time for a line in ns */
        lineclock = (info->var.pixclock * (info->var.xres +
                                    info->var.right_margin +
                                    info->var.hsync_len +
                                    info->var.left_margin)) / 1000;


        /* time for a frame in ns (precision in 32bpp) */
        frameclock = lineclock * (info->var.yres +
                                  info->var.lower_margin +
                                  info->var.vsync_len +
                                  info->var.upper_margin);

        /* Calculate refresh rate and horrizontal clocks */
        par->VFREQ = (1000000000 + (frameclock / 2)) / frameclock;
        par->HCLK = (1000000000 + (lineclock / 2)) / lineclock;
        par->PIXCLK = ((1000000000 + (info->var.pixclock / 2))
                                        / info->var.pixclock) * 10;

        /* calculate horizontal timings */
        par->HFP = info->var.right_margin;
        par->HST = info->var.hsync_len;
        par->HBP = info->var.left_margin;
        par->HTot = par->XRES + par->HBP + par->HST + par->HFP;

        /* calculate vertical timings */
        par->VFP = info->var.lower_margin;
        par->VST = info->var.vsync_len;
        par->VBP = info->var.upper_margin;
        par->VTot = par->YRES + par->VBP + par->VST + par->VFP;

        par->HSP = (info->var.sync & FB_SYNC_HOR_HIGH_ACT) ? 1 : 0;
        par->VSP = (info->var.sync & FB_SYNC_VERT_HIGH_ACT) ? 1 : 0;

        kyro_dev_video_mode_set(info);

        /* length of a line in bytes    */
        info->fix.line_length = get_line_length(par->XRES, par->PIXDEPTH);
        info->fix.visual = FB_VISUAL_TRUECOLOR;

        return 0;
}

static int kyrofb_setcolreg(u_int regno, u_int red, u_int green,
                            u_int blue, u_int transp, struct fb_info *info)
{
        struct kyrofb_info *par = info->par;

        if (regno > 255)
                return 1;       /* Invalid register */

        if (regno < 16) {
                switch (info->var.bits_per_pixel) {
                case 16:
                        par->palette[regno] =
                             (red   & 0xf800) |
                            ((green & 0xfc00) >> 5) |
                            ((blue  & 0xf800) >> 11);
                        break;
                case 32:
                        red >>= 8; green >>= 8; blue >>= 8; transp >>= 8;
                        par->palette[regno] =
                            (transp << 24) | (red << 16) | (green << 8) | blue;
                        break;
                }
        }

        return 0;
}

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

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

        while ((this_opt = strsep(&options, ","))) {
                if (!*this_opt)
                        continue;
                if (strcmp(this_opt, "nopan") == 0) {
                        nopan = 1;
                } else if (strcmp(this_opt, "nowrap") == 0) {
                        nowrap = 1;
                } else if (strcmp(this_opt, "nomtrr") == 0) {
                        nomtrr = 1;
                } else {
                        mode_option = this_opt;
                }
        }

        return 0;
}
#endif

static int kyrofb_ioctl(struct fb_info *info,
                        unsigned int cmd, unsigned long arg)
{
        overlay_create ol_create;
        overlay_viewport_set ol_viewport_set;
        void __user *argp = (void __user *)arg;

        switch (cmd) {
        case KYRO_IOCTL_OVERLAY_CREATE:
                if (copy_from_user(&ol_create, argp, sizeof(overlay_create)))
                        return -EFAULT;

                if (kyro_dev_overlay_create(ol_create.ulWidth,
                                            ol_create.ulHeight, 0) < 0) {
                        printk(KERN_ERR "Kyro FB: failed to create overlay surface.\n");

                        return -EINVAL;
                }
                break;
        case KYRO_IOCTL_OVERLAY_VIEWPORT_SET:
                if (copy_from_user(&ol_viewport_set, argp,
                               sizeof(overlay_viewport_set)))
                        return -EFAULT;

                if (kyro_dev_overlay_viewport_set(ol_viewport_set.xOrgin,
                                                  ol_viewport_set.yOrgin,
                                                  ol_viewport_set.xSize,
                                                  ol_viewport_set.ySize) != 0)
                {
                        printk(KERN_ERR "Kyro FB: failed to create overlay viewport.\n");
                        return -EINVAL;
                }
                break;
        case KYRO_IOCTL_SET_VIDEO_MODE:
                {
                        printk(KERN_ERR "Kyro FB: KYRO_IOCTL_SET_VIDEO_MODE is"
                                "obsolete, use the appropriate fb_ioctl()"
                                "command instead.\n");
                        return -EINVAL;
                }
        case KYRO_IOCTL_UVSTRIDE:
                if (copy_to_user(argp, &deviceInfo.ulOverlayUVStride, sizeof(deviceInfo.ulOverlayUVStride)))
                        return -EFAULT;
                break;
        case KYRO_IOCTL_STRIDE:
                if (copy_to_user(argp, &deviceInfo.ulOverlayStride, sizeof(deviceInfo.ulOverlayStride)))
                        return -EFAULT;
                break;
        case KYRO_IOCTL_OVERLAY_OFFSET:
                if (copy_to_user(argp, &deviceInfo.ulOverlayOffset, sizeof(deviceInfo.ulOverlayOffset)))
                        return -EFAULT;
                break;
        }

        return 0;
}

static const struct pci_device_id kyrofb_pci_tbl[] = {
        { PCI_VENDOR_ID_ST, PCI_DEVICE_ID_STG4000,
          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
        { 0, }
};

MODULE_DEVICE_TABLE(pci, kyrofb_pci_tbl);

static struct pci_driver kyrofb_pci_driver = {
        .name           = "kyrofb",
        .id_table       = kyrofb_pci_tbl,
        .probe          = kyrofb_probe,
        .remove         = kyrofb_remove,
};

static const struct fb_ops kyrofb_ops = {
        .owner          = THIS_MODULE,
        .fb_check_var   = kyrofb_check_var,
        .fb_set_par     = kyrofb_set_par,
        .fb_setcolreg   = kyrofb_setcolreg,
        .fb_ioctl       = kyrofb_ioctl,
        .fb_fillrect    = cfb_fillrect,
        .fb_copyarea    = cfb_copyarea,
        .fb_imageblit   = cfb_imageblit,
};

static int kyrofb_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
        struct fb_info *info;
        struct kyrofb_info *currentpar;
        unsigned long size;
        int err;

        if ((err = pci_enable_device(pdev))) {
                printk(KERN_WARNING "kyrofb: Can't enable pdev: %d\n", err);
                return err;
        }

        info = framebuffer_alloc(sizeof(struct kyrofb_info), &pdev->dev);
        if (!info)
                return -ENOMEM;

        currentpar = info->par;

        kyro_fix.smem_start = pci_resource_start(pdev, 0);
        kyro_fix.smem_len   = pci_resource_len(pdev, 0);
        kyro_fix.mmio_start = pci_resource_start(pdev, 1);
        kyro_fix.mmio_len   = pci_resource_len(pdev, 1);

        currentpar->regbase = deviceInfo.pSTGReg =
                ioremap(kyro_fix.mmio_start, kyro_fix.mmio_len);
        if (!currentpar->regbase)
                goto out_free_fb;

        info->screen_base = pci_ioremap_wc_bar(pdev, 0);
        if (!info->screen_base)
                goto out_unmap_regs;

        if (!nomtrr)
                currentpar->wc_cookie = arch_phys_wc_add(kyro_fix.smem_start,
                                                         kyro_fix.smem_len);

        kyro_fix.ypanstep       = nopan ? 0 : 1;
        kyro_fix.ywrapstep      = nowrap ? 0 : 1;

        info->fbops             = &kyrofb_ops;
        info->fix               = kyro_fix;
        info->pseudo_palette    = currentpar->palette;
        info->flags             = FBINFO_DEFAULT;

        SetCoreClockPLL(deviceInfo.pSTGReg, pdev);

        deviceInfo.ulNextFreeVidMem = 0;
        deviceInfo.ulOverlayOffset = 0;

        /* This should give a reasonable default video mode */
        if (!fb_find_mode(&info->var, info, mode_option, kyro_modedb,
                          NUM_TOTAL_MODES, &kyro_modedb[VMODE_1024_768_75], 32))
                info->var = kyro_var;

        fb_alloc_cmap(&info->cmap, 256, 0);

        kyrofb_set_par(info);
        kyrofb_check_var(&info->var, info);

        size = get_line_length(info->var.xres_virtual,
                               info->var.bits_per_pixel);
        size *= info->var.yres_virtual;

        fb_memset(info->screen_base, 0, size);

        if (register_framebuffer(info) < 0)
                goto out_unmap;

        fb_info(info, "%s frame buffer device, at %dx%d@%d using %ldk/%ldk of VRAM\n",
                info->fix.id,
                info->var.xres, info->var.yres, info->var.bits_per_pixel,
                size >> 10, (unsigned long)info->fix.smem_len >> 10);

        pci_set_drvdata(pdev, info);

        return 0;

out_unmap:
        iounmap(info->screen_base);
out_unmap_regs:
        iounmap(currentpar->regbase);
out_free_fb:
        framebuffer_release(info);

        return -EINVAL;
}

static void kyrofb_remove(struct pci_dev *pdev)
{
        struct fb_info *info = pci_get_drvdata(pdev);
        struct kyrofb_info *par = info->par;

        /* Reset the board */
        StopVTG(deviceInfo.pSTGReg);
        DisableRamdacOutput(deviceInfo.pSTGReg);

        /* Sync up the PLL */
        SetCoreClockPLL(deviceInfo.pSTGReg, pdev);

        deviceInfo.ulNextFreeVidMem = 0;
        deviceInfo.ulOverlayOffset = 0;

        iounmap(info->screen_base);
        iounmap(par->regbase);

        arch_phys_wc_del(par->wc_cookie);

        unregister_framebuffer(info);
        framebuffer_release(info);
}

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

        if (fb_get_options("kyrofb", &option))
                return -ENODEV;
        kyrofb_setup(option);
#endif
        return pci_register_driver(&kyrofb_pci_driver);
}

static void __exit kyrofb_exit(void)
{
        pci_unregister_driver(&kyrofb_pci_driver);
}

module_init(kyrofb_init);

#ifdef MODULE
module_exit(kyrofb_exit);
#endif

MODULE_AUTHOR("STMicroelectronics; Paul Mundt <lethal@linux-sh.org>");
MODULE_LICENSE("GPL");