// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Geode LX framebuffer driver.
 *
 * Copyright (C) 2007 Advanced Micro Devices, Inc.
 * Built from gxfb (which is Copyright (C) 2006 Arcom Control Systems Ltd.)
 */

#include <linux/aperture.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/console.h>
#include <linux/mm.h>
#include <linux/suspend.h>
#include <linux/delay.h>
#include <linux/fb.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/uaccess.h>

#include <asm/olpc.h>

#include "lxfb.h"

static char *mode_option;
static int noclear, nopanel, nocrt;
static int vram;
static int vt_switch;

/* Most of these modes are sorted in ascending order, but
 * since the first entry in this table is the "default" mode,
 * we try to make it something sane - 640x480-60 is sane
 */

static struct fb_videomode geode_modedb[] = {
        /* 640x480-60 */
        { NULL, 60, 640, 480, 39682, 48, 8, 25, 2, 88, 2,
          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
          FB_VMODE_NONINTERLACED, 0 },
        /* 640x400-70 */
        { NULL, 70, 640, 400, 39770, 40, 8, 28, 5, 96, 2,
          FB_SYNC_HOR_HIGH_ACT,
          FB_VMODE_NONINTERLACED, 0 },
        /* 640x480-70 */
        { NULL, 70, 640, 480, 35014, 88, 24, 15, 2, 64, 3,
          0, FB_VMODE_NONINTERLACED, 0 },
        /* 640x480-72 */
        { NULL, 72, 640, 480, 32102, 120, 16, 20, 1, 40, 3,
          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
          FB_VMODE_NONINTERLACED, 0 },
        /* 640x480-75 */
        { NULL, 75, 640, 480, 31746, 120, 16, 16, 1, 64, 3,
          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
          FB_VMODE_NONINTERLACED, 0 },
        /* 640x480-85 */
        { NULL, 85, 640, 480, 27780, 80, 56, 25, 1, 56, 3,
          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
          FB_VMODE_NONINTERLACED, 0 },
        /* 640x480-90 */
        { NULL, 90, 640, 480, 26392, 96, 32, 22, 1, 64, 3,
          0, FB_VMODE_NONINTERLACED, 0 },
        /* 640x480-100 */
        { NULL, 100, 640, 480, 23167, 104, 40, 25, 1, 64, 3,
          0, FB_VMODE_NONINTERLACED, 0 },
        /* 640x480-60 */
        { NULL, 60, 640, 480, 39682, 48, 16, 25, 10, 88, 2,
          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
          FB_VMODE_NONINTERLACED, 0 },
        /* 800x600-56 */
        { NULL, 56, 800, 600, 27901, 128, 24, 22, 1, 72, 2,
          0, FB_VMODE_NONINTERLACED, 0 },
        /* 800x600-60 */
        { NULL, 60, 800, 600, 25131, 72, 32, 23, 1, 136, 4,
          0, FB_VMODE_NONINTERLACED, 0 },
        /* 800x600-70 */
        { NULL, 70, 800, 600, 21873, 120, 40, 21, 4, 80, 3,
          0, FB_VMODE_NONINTERLACED, 0 },
        /* 800x600-72 */
        { NULL, 72, 800, 600, 20052, 64, 56, 23, 37, 120, 6,
          0, FB_VMODE_NONINTERLACED, 0 },
        /* 800x600-75 */
        { NULL, 75, 800, 600, 20202, 160, 16, 21, 1, 80, 3,
          0, FB_VMODE_NONINTERLACED, 0 },
        /* 800x600-85 */
        { NULL, 85, 800, 600, 17790, 152, 32, 27, 1, 64, 3,
          0, FB_VMODE_NONINTERLACED, 0 },
        /* 800x600-90 */
        { NULL, 90, 800, 600, 16648, 128, 40, 28, 1, 88, 3,
          0, FB_VMODE_NONINTERLACED, 0 },
        /* 800x600-100 */
        { NULL, 100, 800, 600, 14667, 136, 48, 27, 1, 88, 3,
          0, FB_VMODE_NONINTERLACED, 0 },
        /* 800x600-60 */
        { NULL, 60, 800, 600, 25131, 88, 40, 23, 1, 128, 4,
          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
          FB_VMODE_NONINTERLACED, 0 },
        /* 1024x768-60 */
        { NULL, 60, 1024, 768, 15385, 160, 24, 29, 3, 136, 6,
          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
          FB_VMODE_NONINTERLACED, 0 },
        /* 1024x768-70 */
        { NULL, 70, 1024, 768, 13346, 144, 24, 29, 3, 136, 6,
          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
          FB_VMODE_NONINTERLACED, 0 },
        /* 1024x768-72 */
        { NULL, 72, 1024, 768, 12702, 168, 56, 29, 4, 112, 3,
          0, FB_VMODE_NONINTERLACED, 0 },
        /* 1024x768-75 */
        { NULL, 75, 1024, 768, 12703, 176, 16, 28, 1, 96, 3,
          0, FB_VMODE_NONINTERLACED, 0 },
        /* 1024x768-85 */
        { NULL, 85, 1024, 768, 10581, 208, 48, 36, 1, 96, 3,
          0, FB_VMODE_NONINTERLACED, 0 },
        /* 1024x768-90 */
        { NULL, 90, 1024, 768, 9981, 176, 64, 37, 1, 112, 3,
          0, FB_VMODE_NONINTERLACED, 0 },
        /* 1024x768-100 */
        { NULL, 100, 1024, 768, 8825, 184, 72, 42, 1, 112, 3,
          0, FB_VMODE_NONINTERLACED, 0 },
        /* 1024x768-60 */
        { NULL, 60, 1024, 768, 15385, 160, 24, 29, 3, 136, 6,
          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
          FB_VMODE_NONINTERLACED, 0 },
        /* 1152x864-60 */
        { NULL, 60, 1152, 864, 12251, 184, 64, 27, 1, 120, 3,
          0, FB_VMODE_NONINTERLACED, 0 },
        /* 1152x864-70 */
        { NULL, 70, 1152, 864, 10254, 192, 72, 32, 8, 120, 3,
          0, FB_VMODE_NONINTERLACED, 0 },
        /* 1152x864-72 */
        { NULL, 72, 1152, 864, 9866, 200, 72, 33, 7, 128, 3,
          0, FB_VMODE_NONINTERLACED, 0 },
        /* 1152x864-75 */
        { NULL, 75, 1152, 864, 9259, 256, 64, 32, 1, 128, 3,
          0, FB_VMODE_NONINTERLACED, 0 },
        /* 1152x864-85 */
        { NULL, 85, 1152, 864, 8357, 200, 72, 37, 3, 128, 3,
          0, FB_VMODE_NONINTERLACED, 0 },
        /* 1152x864-90 */
        { NULL, 90, 1152, 864, 7719, 208, 80, 42, 9, 128, 3,
          0, FB_VMODE_NONINTERLACED, 0 },
        /* 1152x864-100 */
        { NULL, 100, 1152, 864, 6947, 208, 80, 48, 3, 128, 3,
          0, FB_VMODE_NONINTERLACED, 0 },
        /* 1152x864-60 */
        { NULL, 60, 1152, 864, 12251, 184, 64, 27, 1, 120, 3,
          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
          FB_VMODE_NONINTERLACED, 0 },
        /* 1280x1024-60 */
        { NULL, 60, 1280, 1024, 9262, 248, 48, 38, 1, 112, 3,
          0, FB_VMODE_NONINTERLACED, 0 },
        /* 1280x1024-70 */
        { NULL, 70, 1280, 1024, 7719, 224, 88, 38, 6, 136, 3,
          0, FB_VMODE_NONINTERLACED, 0 },
        /* 1280x1024-72 */
        { NULL, 72, 1280, 1024, 7490, 224, 88, 39, 7, 136, 3,
          0, FB_VMODE_NONINTERLACED, 0 },
        /* 1280x1024-75 */
        { NULL, 75, 1280, 1024, 7409, 248, 16, 38, 1, 144, 3,
          0, FB_VMODE_NONINTERLACED, 0 },
        /* 1280x1024-85 */
        { NULL, 85, 1280, 1024, 6351, 224, 64, 44, 1, 160, 3,
          0, FB_VMODE_NONINTERLACED, 0 },
        /* 1280x1024-90 */
        { NULL, 90, 1280, 1024, 5791, 240, 96, 51, 12, 144, 3,
          0, FB_VMODE_NONINTERLACED, 0 },
        /* 1280x1024-100 */
        { NULL, 100, 1280, 1024, 5212, 240, 96, 57, 6, 144, 3,
          0, FB_VMODE_NONINTERLACED, 0 },
        /* 1280x1024-60 */
        { NULL, 60, 1280, 1024, 9262, 248, 48, 38, 1, 112, 3,
          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
          FB_VMODE_NONINTERLACED, 0 },
        /* 1600x1200-60 */
        { NULL, 60, 1600, 1200, 6172, 304, 64, 46, 1, 192, 3,
          0, FB_VMODE_NONINTERLACED, 0 },
        /* 1600x1200-70 */
        { NULL, 70, 1600, 1200, 5291, 304, 64, 46, 1, 192, 3,
          0, FB_VMODE_NONINTERLACED, 0 },
        /* 1600x1200-72 */
        { NULL, 72, 1600, 1200, 5053, 288, 112, 47, 13, 176, 3,
          0, FB_VMODE_NONINTERLACED, 0 },
        /* 1600x1200-75 */
        { NULL, 75, 1600, 1200, 4938, 304, 64, 46, 1, 192, 3,
          0, FB_VMODE_NONINTERLACED, 0 },
        /* 1600x1200-85 */
        { NULL, 85, 1600, 1200, 4357, 304, 64, 46, 1, 192, 3,
          0, FB_VMODE_NONINTERLACED, 0 },
        /* 1600x1200-90 */
        { NULL, 90, 1600, 1200, 3981, 304, 128, 60, 1, 176, 3,
          0, FB_VMODE_NONINTERLACED, 0 },
        /* 1600x1200-100 */
        { NULL, 100, 1600, 1200, 3563, 304, 128, 67, 1, 176, 3,
          0, FB_VMODE_NONINTERLACED, 0 },
        /* 1600x1200-60 */
        { NULL, 60, 1600, 1200, 6172, 304, 64, 46, 1, 192, 3,
          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
          FB_VMODE_NONINTERLACED, 0 },
        /* 1920x1440-60 */
        { NULL, 60, 1920, 1440, 4273, 344, 128, 56, 1, 208, 3,
          0, FB_VMODE_NONINTERLACED, 0 },
        /* 1920x1440-70 */
        { NULL, 70, 1920, 1440, 3593, 360, 152, 55, 8, 208, 3,
          0, FB_VMODE_NONINTERLACED, 0 },
        /* 1920x1440-72 */
        { NULL, 72, 1920, 1440, 3472, 360, 152, 68, 4, 208, 3,
          0, FB_VMODE_NONINTERLACED, 0 },
        /* 1920x1440-75 */
        { NULL, 75, 1920, 1440, 3367, 352, 144, 56, 1, 224, 3,
          0, FB_VMODE_NONINTERLACED, 0 },
        /* 1920x1440-85 */
        { NULL, 85, 1920, 1440, 2929, 368, 152, 68, 1, 216, 3,
          0, FB_VMODE_NONINTERLACED, 0 },
};

static struct fb_videomode olpc_dcon_modedb[] = {
        /* The only mode the DCON has is 1200x900 */
        { NULL, 50, 1200, 900, 17460, 24, 8, 4, 5, 8, 3,
          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
          FB_VMODE_NONINTERLACED, 0 }
};

static void get_modedb(struct fb_videomode **modedb, unsigned int *size)
{
        if (olpc_has_dcon()) {
                *modedb = (struct fb_videomode *) olpc_dcon_modedb;
                *size = ARRAY_SIZE(olpc_dcon_modedb);
        } else {
                *modedb = (struct fb_videomode *) geode_modedb;
                *size = ARRAY_SIZE(geode_modedb);
        }
}

static int lxfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
{
        if (!var->pixclock)
                return -EINVAL;

        if (var->xres > 1920 || var->yres > 1440)
                return -EINVAL;

        if (var->bits_per_pixel == 32) {
                var->red.offset   = 16; var->red.length   = 8;
                var->green.offset =  8; var->green.length = 8;
                var->blue.offset  =  0; var->blue.length  = 8;
        } else if (var->bits_per_pixel == 16) {
                var->red.offset   = 11; var->red.length   = 5;
                var->green.offset =  5; var->green.length = 6;
                var->blue.offset  =  0; var->blue.length  = 5;
        } else if (var->bits_per_pixel == 8) {
                var->red.offset   = 0; var->red.length   = 8;
                var->green.offset = 0; var->green.length = 8;
                var->blue.offset  = 0; var->blue.length  = 8;
        } else
                return -EINVAL;

        var->transp.offset = 0; var->transp.length = 0;

        /* Enough video memory? */
        if ((lx_get_pitch(var->xres, var->bits_per_pixel) * var->yres)
            > info->fix.smem_len)
          return -EINVAL;

        return 0;
}

static int lxfb_set_par(struct fb_info *info)
{
        if (info->var.bits_per_pixel > 8)
                info->fix.visual = FB_VISUAL_TRUECOLOR;
        else
                info->fix.visual = FB_VISUAL_PSEUDOCOLOR;

        info->fix.line_length = lx_get_pitch(info->var.xres,
                info->var.bits_per_pixel);

        lx_set_mode(info);
        return 0;
}

static inline u_int chan_to_field(u_int chan, struct fb_bitfield *bf)
{
        chan &= 0xffff;
        chan >>= 16 - bf->length;
        return chan << bf->offset;
}

static int lxfb_setcolreg(unsigned regno, unsigned red, unsigned green,
                           unsigned blue, unsigned transp,
                           struct fb_info *info)
{
        if (info->var.grayscale) {
                /* grayscale = 0.30*R + 0.59*G + 0.11*B */
                red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8;
        }

        /* Truecolor has hardware independent palette */
        if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
                u32 *pal = info->pseudo_palette;
                u32 v;

                if (regno >= 16)
                        return -EINVAL;

                v  = chan_to_field(red, &info->var.red);
                v |= chan_to_field(green, &info->var.green);
                v |= chan_to_field(blue, &info->var.blue);

                pal[regno] = v;
        } else {
                if (regno >= 256)
                        return -EINVAL;

                lx_set_palette_reg(info, regno, red, green, blue);
        }

        return 0;
}

static int lxfb_blank(int blank_mode, struct fb_info *info)
{
        return lx_blank_display(info, blank_mode);
}


static int lxfb_map_video_memory(struct fb_info *info, struct pci_dev *dev)
{
        struct lxfb_par *par = info->par;
        int ret;

        ret = pci_enable_device(dev);

        if (ret)
                return ret;

        ret = pci_request_region(dev, 0, "lxfb-framebuffer");

        if (ret)
                return ret;

        ret = pci_request_region(dev, 1, "lxfb-gp");

        if (ret)
                return ret;

        ret = pci_request_region(dev, 2, "lxfb-vg");

        if (ret)
                return ret;

        ret = pci_request_region(dev, 3, "lxfb-vp");

        if (ret)
                return ret;

        info->fix.smem_start = pci_resource_start(dev, 0);
        info->fix.smem_len = vram ? vram : lx_framebuffer_size();

        info->screen_base = ioremap(info->fix.smem_start, info->fix.smem_len);

        ret = -ENOMEM;

        if (info->screen_base == NULL)
                return ret;

        par->gp_regs = pci_ioremap_bar(dev, 1);

        if (par->gp_regs == NULL)
                return ret;

        par->dc_regs = pci_ioremap_bar(dev, 2);

        if (par->dc_regs == NULL)
                return ret;

        par->vp_regs = pci_ioremap_bar(dev, 3);

        if (par->vp_regs == NULL)
                return ret;

        write_dc(par, DC_UNLOCK, DC_UNLOCK_UNLOCK);
        write_dc(par, DC_GLIU0_MEM_OFFSET, info->fix.smem_start & 0xFF000000);
        write_dc(par, DC_UNLOCK, DC_UNLOCK_LOCK);

        dev_info(&dev->dev, "%d KB of video memory at 0x%lx\n",
                 info->fix.smem_len / 1024, info->fix.smem_start);

        return 0;
}

static const struct fb_ops lxfb_ops = {
        .owner          = THIS_MODULE,
        FB_DEFAULT_IOMEM_OPS,
        .fb_check_var   = lxfb_check_var,
        .fb_set_par     = lxfb_set_par,
        .fb_setcolreg   = lxfb_setcolreg,
        .fb_blank       = lxfb_blank,
};

static struct fb_info *lxfb_init_fbinfo(struct device *dev)
{
        struct lxfb_par *par;
        struct fb_info *info;

        /* Alloc enough space for the pseudo palette. */
        info = framebuffer_alloc(sizeof(struct lxfb_par) + sizeof(u32) * 16,
                                 dev);
        if (!info)
                return NULL;

        par = info->par;

        strcpy(info->fix.id, "Geode LX");

        info->fix.type          = FB_TYPE_PACKED_PIXELS;
        info->fix.type_aux      = 0;
        info->fix.xpanstep      = 0;
        info->fix.ypanstep      = 0;
        info->fix.ywrapstep     = 0;
        info->fix.accel         = FB_ACCEL_NONE;

        info->var.nonstd        = 0;
        info->var.activate      = FB_ACTIVATE_NOW;
        info->var.height        = -1;
        info->var.width = -1;
        info->var.accel_flags = 0;
        info->var.vmode = FB_VMODE_NONINTERLACED;

        info->fbops             = &lxfb_ops;
        info->node              = -1;

        info->pseudo_palette    = (void *)par + sizeof(struct lxfb_par);

        if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) {
                framebuffer_release(info);
                return NULL;
        }

        info->var.grayscale     = 0;

        return info;
}

static int __maybe_unused lxfb_suspend(struct device *dev)
{
        struct fb_info *info = dev_get_drvdata(dev);

        console_lock();
        lx_powerdown(info);
        fb_set_suspend(info, 1);
        console_unlock();

        /* there's no point in setting PCI states; we emulate PCI, so
         * we don't end up getting power savings anyways */

        return 0;
}

static int __maybe_unused lxfb_resume(struct device *dev)
{
        struct fb_info *info = dev_get_drvdata(dev);
        int ret;

        console_lock();
        ret = lx_powerup(info);
        if (ret) {
                printk(KERN_ERR "lxfb:  power up failed!\n");
                return ret;
        }

        fb_set_suspend(info, 0);
        console_unlock();
        return 0;
}

static int lxfb_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
        struct lxfb_par *par;
        struct fb_info *info;
        int ret;

        struct fb_videomode *modedb_ptr;
        unsigned int modedb_size;

        ret = aperture_remove_conflicting_pci_devices(pdev, "lxfb");
        if (ret)
                return ret;

        info = lxfb_init_fbinfo(&pdev->dev);

        if (info == NULL)
                return -ENOMEM;

        par = info->par;

        ret = lxfb_map_video_memory(info, pdev);

        if (ret < 0) {
                dev_err(&pdev->dev,
                        "failed to map frame buffer or controller registers\n");
                goto err;
        }

        /* Set up the desired outputs */

        par->output = 0;
        par->output |= (nopanel) ? 0 : OUTPUT_PANEL;
        par->output |= (nocrt) ? 0 : OUTPUT_CRT;

        /* Set up the mode database */

        get_modedb(&modedb_ptr, &modedb_size);
        ret = fb_find_mode(&info->var, info, mode_option,
                           modedb_ptr, modedb_size, NULL, 16);

        if (ret == 0 || ret == 4) {
                dev_err(&pdev->dev, "could not find valid video mode\n");
                ret = -EINVAL;
                goto err;
        }

        /* Clear the screen of garbage, unless noclear was specified,
         * in which case we assume the user knows what he is doing */

        if (!noclear)
                memset_io(info->screen_base, 0, info->fix.smem_len);

        /* Set the mode */

        lxfb_check_var(&info->var, info);
        lxfb_set_par(info);

        pm_set_vt_switch(vt_switch);

        if (register_framebuffer(info) < 0) {
                ret = -EINVAL;
                goto err;
        }
        pci_set_drvdata(pdev, info);
        fb_info(info, "%s frame buffer device\n", info->fix.id);

        return 0;

err:
        if (info->screen_base) {
                iounmap(info->screen_base);
                pci_release_region(pdev, 0);
        }
        if (par->gp_regs) {
                iounmap(par->gp_regs);
                pci_release_region(pdev, 1);
        }
        if (par->dc_regs) {
                iounmap(par->dc_regs);
                pci_release_region(pdev, 2);
        }
        if (par->vp_regs) {
                iounmap(par->vp_regs);
                pci_release_region(pdev, 3);
        }

        fb_dealloc_cmap(&info->cmap);
        framebuffer_release(info);

        return ret;
}

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

        unregister_framebuffer(info);

        iounmap(info->screen_base);
        pci_release_region(pdev, 0);

        iounmap(par->gp_regs);
        pci_release_region(pdev, 1);

        iounmap(par->dc_regs);
        pci_release_region(pdev, 2);

        iounmap(par->vp_regs);
        pci_release_region(pdev, 3);

        fb_dealloc_cmap(&info->cmap);
        framebuffer_release(info);
}

static struct pci_device_id lxfb_id_table[] = {
        { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_LX_VIDEO) },
        { 0, }
};

MODULE_DEVICE_TABLE(pci, lxfb_id_table);

static const struct dev_pm_ops lxfb_pm_ops = {
#ifdef CONFIG_PM_SLEEP
        .suspend        = lxfb_suspend,
        .resume         = lxfb_resume,
        .freeze         = NULL,
        .thaw           = lxfb_resume,
        .poweroff       = NULL,
        .restore        = lxfb_resume,
#endif
};

static struct pci_driver lxfb_driver = {
        .name           = "lxfb",
        .id_table       = lxfb_id_table,
        .probe          = lxfb_probe,
        .remove         = lxfb_remove,
        .driver.pm      = &lxfb_pm_ops,
};

#ifndef MODULE
static int __init lxfb_setup(char *options)
{
        char *opt;

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

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

                if (!strcmp(opt, "noclear"))
                        noclear = 1;
                else if (!strcmp(opt, "nopanel"))
                        nopanel = 1;
                else if (!strcmp(opt, "nocrt"))
                        nocrt = 1;
                else
                        mode_option = opt;
        }

        return 0;
}
#endif

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

        if (fb_modesetting_disabled("lxfb"))
                return -ENODEV;

#ifndef MODULE
        if (fb_get_options("lxfb", &option))
                return -ENODEV;

        lxfb_setup(option);
#endif
        return pci_register_driver(&lxfb_driver);
}
static void __exit lxfb_cleanup(void)
{
        pci_unregister_driver(&lxfb_driver);
}

module_init(lxfb_init);
module_exit(lxfb_cleanup);

module_param(mode_option, charp, 0);
MODULE_PARM_DESC(mode_option, "video mode (<x>x<y>[-<bpp>][@<refr>])");

module_param(vram, int, 0);
MODULE_PARM_DESC(vram, "video memory size");

module_param(vt_switch, int, 0);
MODULE_PARM_DESC(vt_switch, "enable VT switch during suspend/resume");

MODULE_DESCRIPTION("Framebuffer driver for the AMD Geode LX");
MODULE_LICENSE("GPL");