sunxvr2500.c

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/* s3d.c: Sun 3DLABS XVR-2500 et al. driver for sparc64 systems
 *
 * Copyright (C) 2007 David S. Miller ([email protected])
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/fb.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/of_device.h>

#include <asm/io.h>

struct s3d_info {
    struct fb_info      *info;
    struct pci_dev      *pdev;

    char __iomem        *fb_base;
    unsigned long       fb_base_phys;

    struct device_node  *of_node;

    unsigned int        width;
    unsigned int        height;
    unsigned int        depth;
    unsigned int        fb_size;

    u32         pseudo_palette[16];
};

static int __devinit s3d_get_props(struct s3d_info *sp)
{
    sp->width = of_getintprop_default(sp->of_node, "width", 0);
    sp->height = of_getintprop_default(sp->of_node, "height", 0);
    sp->depth = of_getintprop_default(sp->of_node, "depth", 8);

    if (!sp->width || !sp->height) {
        printk(KERN_ERR "s3d: Critical properties missing for %s\n",
               pci_name(sp->pdev));
        return -EINVAL;
    }

    return 0;
}

static int s3d_setcolreg(unsigned regno,
             unsigned red, unsigned green, unsigned blue,
             unsigned transp, struct fb_info *info)
{
    u32 value;

    if (regno < 16) {
        red >>= 8;
        green >>= 8;
        blue >>= 8;

        value = (blue << 24) | (green << 16) | (red << 8);
        ((u32 *)info->pseudo_palette)[regno] = value;
    }

    return 0;
}

static struct fb_ops s3d_ops = {
    .owner          = THIS_MODULE,
    .fb_setcolreg       = s3d_setcolreg,
    .fb_fillrect        = cfb_fillrect,
    .fb_copyarea        = cfb_copyarea,
    .fb_imageblit       = cfb_imageblit,
};

static int __devinit s3d_set_fbinfo(struct s3d_info *sp)
{
    struct fb_info *info = sp->info;
    struct fb_var_screeninfo *var = &info->var;

    info->flags = FBINFO_DEFAULT;
    info->fbops = &s3d_ops;
    info->screen_base = sp->fb_base;
    info->screen_size = sp->fb_size;

    info->pseudo_palette = sp->pseudo_palette;

    /* Fill fix common fields */
    strlcpy(info->fix.id, "s3d", sizeof(info->fix.id));
        info->fix.smem_start = sp->fb_base_phys;
        info->fix.smem_len = sp->fb_size;
        info->fix.type = FB_TYPE_PACKED_PIXELS;
    if (sp->depth == 32 || sp->depth == 24)
        info->fix.visual = FB_VISUAL_TRUECOLOR;
    else
        info->fix.visual = FB_VISUAL_PSEUDOCOLOR;

    var->xres = sp->width;
    var->yres = sp->height;
    var->xres_virtual = var->xres;
    var->yres_virtual = var->yres;
    var->bits_per_pixel = sp->depth;

    var->red.offset = 8;
    var->red.length = 8;
    var->green.offset = 16;
    var->green.length = 8;
    var->blue.offset = 24;
    var->blue.length = 8;
    var->transp.offset = 0;
    var->transp.length = 0;

    if (fb_alloc_cmap(&info->cmap, 256, 0)) {
        printk(KERN_ERR "s3d: Cannot allocate color map.\n");
        return -ENOMEM;
    }

        return 0;
}

static int __devinit s3d_pci_register(struct pci_dev *pdev,
                      const struct pci_device_id *ent)
{
    struct fb_info *info;
    struct s3d_info *sp;
    int err;

    err = pci_enable_device(pdev);
    if (err < 0) {
        printk(KERN_ERR "s3d: Cannot enable PCI device %s\n",
               pci_name(pdev));
        goto err_out;
    }

    info = framebuffer_alloc(sizeof(struct s3d_info), &pdev->dev);
    if (!info) {
        printk(KERN_ERR "s3d: Cannot allocate fb_info\n");
        err = -ENOMEM;
        goto err_disable;
    }

    sp = info->par;
    sp->info = info;
    sp->pdev = pdev;
    sp->of_node = pci_device_to_OF_node(pdev);
    if (!sp->of_node) {
        printk(KERN_ERR "s3d: Cannot find OF node of %s\n",
               pci_name(pdev));
        err = -ENODEV;
        goto err_release_fb;
    }

    sp->fb_base_phys = pci_resource_start (pdev, 1);

    err = pci_request_region(pdev, 1, "s3d framebuffer");
    if (err < 0) {
        printk("s3d: Cannot request region 1 for %s\n",
               pci_name(pdev));
        goto err_release_fb;
    }

    err = s3d_get_props(sp);
    if (err)
        goto err_release_pci;

    /* XXX 'linebytes' is often wrong, it is equal to the width
     * XXX with depth of 32 on my XVR-2500 which is clearly not
     * XXX right.  So we don't try to use it.
     */
    switch (sp->depth) {
    case 8:
        info->fix.line_length = sp->width;
        break;
    case 16:
        info->fix.line_length = sp->width * 2;
        break;
    case 24:
        info->fix.line_length = sp->width * 3;
        break;
    case 32:
        info->fix.line_length = sp->width * 4;
        break;
    }
    sp->fb_size = info->fix.line_length * sp->height;

    sp->fb_base = ioremap(sp->fb_base_phys, sp->fb_size);
    if (!sp->fb_base) {
        err = -ENOMEM;
        goto err_release_pci;
    }

    err = s3d_set_fbinfo(sp);
    if (err)
        goto err_unmap_fb;

    pci_set_drvdata(pdev, info);

    printk("s3d: Found device at %s\n", pci_name(pdev));

    err = register_framebuffer(info);
    if (err < 0) {
        printk(KERN_ERR "s3d: Could not register framebuffer %s\n",
               pci_name(pdev));
        goto err_unmap_fb;
    }

    return 0;

err_unmap_fb:
    iounmap(sp->fb_base);

err_release_pci:
    pci_release_region(pdev, 1);

err_release_fb:
        framebuffer_release(info);

err_disable:
    pci_disable_device(pdev);

err_out:
    return err;
}

static void __devexit s3d_pci_unregister(struct pci_dev *pdev)
{
    struct fb_info *info = pci_get_drvdata(pdev);
    struct s3d_info *sp = info->par;

    unregister_framebuffer(info);

    iounmap(sp->fb_base);

    pci_release_region(pdev, 1);

        framebuffer_release(info);

    pci_disable_device(pdev);
}

static struct pci_device_id s3d_pci_table[] = {
    {   PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x002c),   },
    {   PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x002d),   },
    {   PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x002e),   },
    {   PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x002f),   },
    {   PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x0030),   },
    {   PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x0031),   },
    {   PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x0032),   },
    {   PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x0033),   },
    { 0, }
};

static struct pci_driver s3d_driver = {
    .name       = "s3d",
    .id_table   = s3d_pci_table,
    .probe      = s3d_pci_register,
    .remove     = __devexit_p(s3d_pci_unregister),
};

static int __init s3d_init(void)
{
    if (fb_get_options("s3d", NULL))
        return -ENODEV;

    return pci_register_driver(&s3d_driver);
}

static void __exit s3d_exit(void)
{
    pci_unregister_driver(&s3d_driver);
}

module_init(s3d_init);
module_exit(s3d_exit);

MODULE_DESCRIPTION("framebuffer driver for Sun XVR-2500 graphics");
MODULE_AUTHOR("David S. Miller <[email protected]>");
MODULE_VERSION("1.0");
MODULE_LICENSE("GPL");