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0ba2fa8cbd
Support the kernel's nomodeset parameter for all PCI-based fbdev drivers that use aperture helpers to remove other, hardware-agnostic graphics drivers. The parameter is a simple way of using the firmware-provided scanout buffer if the hardware's native driver is broken. The same effect could be achieved with per-driver options, but the importance of the graphics output for many users makes a single, unified approach worthwhile. With nomodeset specified, the fbdev driver module will not load. This unifies behavior with similar DRM drivers. In DRM helpers, modules first check the nomodeset parameter before registering the PCI driver. As fbdev has no such module helpers, we have to modify each driver individually. The name 'nomodeset' is slightly misleading, but has been chosen for historical reasons. Several drivers implemented it before it became a general option for DRM. So keeping the existing name was preferred over introducing a new one. v2: * print a warning if a driver does not init (Helge) * wrap video_firmware_drivers_only() in helper Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Reviewed-by: Javier Martinez Canillas <javierm@redhat.com> Link: https://patchwork.freedesktop.org/patch/msgid/20221111133024.9897-3-tzimmermann@suse.de
259 lines
5.5 KiB
C
259 lines
5.5 KiB
C
/* sunxvr2500.c: Sun 3DLABS XVR-2500 et al. fb driver for sparc64 systems
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*
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* License: GPL
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*
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* Copyright (C) 2007 David S. Miller (davem@davemloft.net)
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*/
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#include <linux/aperture.h>
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#include <linux/kernel.h>
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#include <linux/fb.h>
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#include <linux/pci.h>
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#include <linux/init.h>
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#include <linux/of_device.h>
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#include <asm/io.h>
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struct s3d_info {
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struct fb_info *info;
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struct pci_dev *pdev;
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char __iomem *fb_base;
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unsigned long fb_base_phys;
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struct device_node *of_node;
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unsigned int width;
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unsigned int height;
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unsigned int depth;
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unsigned int fb_size;
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u32 pseudo_palette[16];
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};
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static int s3d_get_props(struct s3d_info *sp)
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{
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sp->width = of_getintprop_default(sp->of_node, "width", 0);
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sp->height = of_getintprop_default(sp->of_node, "height", 0);
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sp->depth = of_getintprop_default(sp->of_node, "depth", 8);
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if (!sp->width || !sp->height) {
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printk(KERN_ERR "s3d: Critical properties missing for %s\n",
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pci_name(sp->pdev));
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return -EINVAL;
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}
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return 0;
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}
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static int s3d_setcolreg(unsigned regno,
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unsigned red, unsigned green, unsigned blue,
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unsigned transp, struct fb_info *info)
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{
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u32 value;
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if (regno < 16) {
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red >>= 8;
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green >>= 8;
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blue >>= 8;
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value = (blue << 24) | (green << 16) | (red << 8);
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((u32 *)info->pseudo_palette)[regno] = value;
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}
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return 0;
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}
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static const struct fb_ops s3d_ops = {
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.owner = THIS_MODULE,
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.fb_setcolreg = s3d_setcolreg,
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.fb_fillrect = cfb_fillrect,
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.fb_copyarea = cfb_copyarea,
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.fb_imageblit = cfb_imageblit,
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};
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static int s3d_set_fbinfo(struct s3d_info *sp)
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{
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struct fb_info *info = sp->info;
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struct fb_var_screeninfo *var = &info->var;
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info->flags = FBINFO_DEFAULT;
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info->fbops = &s3d_ops;
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info->screen_base = sp->fb_base;
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info->screen_size = sp->fb_size;
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info->pseudo_palette = sp->pseudo_palette;
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/* Fill fix common fields */
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strscpy(info->fix.id, "s3d", sizeof(info->fix.id));
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info->fix.smem_start = sp->fb_base_phys;
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info->fix.smem_len = sp->fb_size;
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info->fix.type = FB_TYPE_PACKED_PIXELS;
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if (sp->depth == 32 || sp->depth == 24)
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info->fix.visual = FB_VISUAL_TRUECOLOR;
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else
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info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
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var->xres = sp->width;
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var->yres = sp->height;
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var->xres_virtual = var->xres;
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var->yres_virtual = var->yres;
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var->bits_per_pixel = sp->depth;
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var->red.offset = 8;
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var->red.length = 8;
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var->green.offset = 16;
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var->green.length = 8;
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var->blue.offset = 24;
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var->blue.length = 8;
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var->transp.offset = 0;
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var->transp.length = 0;
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if (fb_alloc_cmap(&info->cmap, 256, 0)) {
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printk(KERN_ERR "s3d: Cannot allocate color map.\n");
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return -ENOMEM;
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}
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return 0;
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}
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static int s3d_pci_register(struct pci_dev *pdev,
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const struct pci_device_id *ent)
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{
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struct fb_info *info;
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struct s3d_info *sp;
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int err;
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err = aperture_remove_conflicting_pci_devices(pdev, "s3dfb");
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if (err)
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return err;
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err = pci_enable_device(pdev);
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if (err < 0) {
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printk(KERN_ERR "s3d: Cannot enable PCI device %s\n",
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pci_name(pdev));
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goto err_out;
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}
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info = framebuffer_alloc(sizeof(struct s3d_info), &pdev->dev);
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if (!info) {
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err = -ENOMEM;
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goto err_disable;
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}
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sp = info->par;
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sp->info = info;
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sp->pdev = pdev;
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sp->of_node = pci_device_to_OF_node(pdev);
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if (!sp->of_node) {
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printk(KERN_ERR "s3d: Cannot find OF node of %s\n",
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pci_name(pdev));
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err = -ENODEV;
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goto err_release_fb;
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}
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sp->fb_base_phys = pci_resource_start (pdev, 1);
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err = pci_request_region(pdev, 1, "s3d framebuffer");
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if (err < 0) {
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printk("s3d: Cannot request region 1 for %s\n",
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pci_name(pdev));
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goto err_release_fb;
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}
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err = s3d_get_props(sp);
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if (err)
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goto err_release_pci;
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/* XXX 'linebytes' is often wrong, it is equal to the width
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* XXX with depth of 32 on my XVR-2500 which is clearly not
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* XXX right. So we don't try to use it.
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*/
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switch (sp->depth) {
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case 8:
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info->fix.line_length = sp->width;
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break;
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case 16:
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info->fix.line_length = sp->width * 2;
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break;
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case 24:
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info->fix.line_length = sp->width * 3;
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break;
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case 32:
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info->fix.line_length = sp->width * 4;
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break;
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}
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sp->fb_size = info->fix.line_length * sp->height;
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sp->fb_base = ioremap(sp->fb_base_phys, sp->fb_size);
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if (!sp->fb_base) {
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err = -ENOMEM;
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goto err_release_pci;
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}
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err = s3d_set_fbinfo(sp);
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if (err)
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goto err_unmap_fb;
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pci_set_drvdata(pdev, info);
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printk("s3d: Found device at %s\n", pci_name(pdev));
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err = register_framebuffer(info);
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if (err < 0) {
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printk(KERN_ERR "s3d: Could not register framebuffer %s\n",
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pci_name(pdev));
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goto err_unmap_fb;
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}
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return 0;
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err_unmap_fb:
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iounmap(sp->fb_base);
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err_release_pci:
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pci_release_region(pdev, 1);
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err_release_fb:
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framebuffer_release(info);
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err_disable:
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pci_disable_device(pdev);
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err_out:
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return err;
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}
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static const struct pci_device_id s3d_pci_table[] = {
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{ PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x002c), },
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{ PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x002d), },
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{ PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x002e), },
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{ PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x002f), },
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{ PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x0030), },
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{ PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x0031), },
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{ PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x0032), },
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{ PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x0033), },
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{ 0, }
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};
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static struct pci_driver s3d_driver = {
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.driver = {
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.suppress_bind_attrs = true,
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},
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.name = "s3d",
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.id_table = s3d_pci_table,
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.probe = s3d_pci_register,
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};
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static int __init s3d_init(void)
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{
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if (fb_modesetting_disabled("s3d"))
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return -ENODEV;
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if (fb_get_options("s3d", NULL))
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return -ENODEV;
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return pci_register_driver(&s3d_driver);
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}
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device_initcall(s3d_init);
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