lxfb_core.c

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/*
 * Geode LX framebuffer driver.
 *
 * Copyright (C) 2007 Advanced Micro Devices, Inc.
 * Built from gxfb (which is Copyright (C) 2006 Arcom Control Systems Ltd.)
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2 of the License, or (at your
 * option) any later version.
 */

#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 "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[] __devinitdata = {
    /* 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 },
};

#ifdef CONFIG_OLPC
#include <asm/olpc.h>

static struct fb_videomode olpc_dcon_modedb[] __devinitdata = {
    /* 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 __devinit 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);
    }
}

#else
static void __devinit get_modedb(struct fb_videomode **modedb,
        unsigned int *size)
{
    *modedb = (struct fb_videomode *) geode_modedb;
    *size = ARRAY_SIZE(geode_modedb);
}
#endif

static int lxfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
{
    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 __devinit 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 struct fb_ops lxfb_ops = {
    .owner      = THIS_MODULE,
    .fb_check_var   = lxfb_check_var,
    .fb_set_par = lxfb_set_par,
    .fb_setcolreg   = lxfb_setcolreg,
    .fb_blank       = lxfb_blank,
    /* No HW acceleration for now. */
    .fb_fillrect    = cfb_fillrect,
    .fb_copyarea    = cfb_copyarea,
    .fb_imageblit   = cfb_imageblit,
};

static struct fb_info * __devinit 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->flags     = FBINFO_DEFAULT;
    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;
}

#ifdef CONFIG_PM
static int lxfb_suspend(struct pci_dev *pdev, pm_message_t state)
{
    struct fb_info *info = pci_get_drvdata(pdev);

    if (state.event == PM_EVENT_SUSPEND) {
        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 lxfb_resume(struct pci_dev *pdev)
{
    struct fb_info *info = pci_get_drvdata(pdev);
    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;
}
#else
#define lxfb_suspend NULL
#define lxfb_resume NULL
#endif

static int __devinit 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;

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

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

    return ret;
}

static void __devexit 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);
    pci_set_drvdata(pdev, NULL);
    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 struct pci_driver lxfb_driver = {
    .name       = "lxfb",
    .id_table   = lxfb_id_table,
    .probe      = lxfb_probe,
    .remove     = lxfb_remove,
    .suspend    = lxfb_suspend,
    .resume     = lxfb_resume,
};

#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;

    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");