drivers/video/fbdev/sunxvr500.c - linux - Git at Google

 /* sunxvr500.c: Sun 3DLABS XVR-500 Expert3D fb driver for sparc64 systems
  *
  * License: GPL
  *
  * Copyright (C) 2007 David S. Miller (davem@davemloft.net)
  */

 #include <linux/aperture.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>

 /* XXX This device has a 'dev-comm' property which apparently is
  * XXX a pointer into the openfirmware's address space which is
  * XXX a shared area the kernel driver can use to keep OBP
  * XXX informed about the current resolution setting.  The idea
  * XXX is that the kernel can change resolutions, and as long
  * XXX as the values in the 'dev-comm' area are accurate then
  * XXX OBP can still render text properly to the console.
  * XXX
  * XXX I'm still working out the layout of this and whether there
  * XXX are any signatures we need to look for etc.
  */
 struct e3d_info {
 	struct fb_info		*info;
 	struct pci_dev		*pdev;

 	spinlock_t		lock;

 	char __iomem		*fb_base;
 	unsigned long		fb_base_phys;

 	unsigned long		fb8_buf_diff;
 	unsigned long		regs_base_phys;

 	void __iomem		*ramdac;

 	struct device_node	*of_node;

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

 	u32			fb_base_reg;
 	u32			fb8_0_off;
 	u32			fb8_1_off;

 	u32			pseudo_palette[16];
 };

 static int e3d_get_props(struct e3d_info *ep)
 {
 	ep->width = of_getintprop_default(ep->of_node, "width", 0);
 	ep->height = of_getintprop_default(ep->of_node, "height", 0);
 	ep->depth = of_getintprop_default(ep->of_node, "depth", 8);

 	if (!ep->width || !ep->height) {
 		printk(KERN_ERR "e3d: Critical properties missing for %s\n",
 		       pci_name(ep->pdev));
 		return -EINVAL;
 	}

 	return 0;
 }

 /* My XVR-500 comes up, at 1280x768 and a FB base register value of
  * 0x04000000, the following video layout register values:
  *
  * RAMDAC_VID_WH	0x03ff04ff
  * RAMDAC_VID_CFG	0x1a0b0088
  * RAMDAC_VID_32FB_0	0x04000000
  * RAMDAC_VID_32FB_1	0x04800000
  * RAMDAC_VID_8FB_0	0x05000000
  * RAMDAC_VID_8FB_1	0x05200000
  * RAMDAC_VID_XXXFB	0x05400000
  * RAMDAC_VID_YYYFB	0x05c00000
  * RAMDAC_VID_ZZZFB	0x05e00000
  */
 /* Video layout registers */
 #define RAMDAC_VID_WH		0x00000070UL /* (height-1)<<16 | (width-1) */
 #define RAMDAC_VID_CFG		0x00000074UL /* 0x1a000088|(linesz_log2<<16) */
 #define RAMDAC_VID_32FB_0	0x00000078UL /* PCI base 32bpp FB buffer 0 */
 #define RAMDAC_VID_32FB_1	0x0000007cUL /* PCI base 32bpp FB buffer 1 */
 #define RAMDAC_VID_8FB_0	0x00000080UL /* PCI base 8bpp FB buffer 0 */
 #define RAMDAC_VID_8FB_1	0x00000084UL /* PCI base 8bpp FB buffer 1 */
 #define RAMDAC_VID_XXXFB	0x00000088UL /* PCI base of XXX FB */
 #define RAMDAC_VID_YYYFB	0x0000008cUL /* PCI base of YYY FB */
 #define RAMDAC_VID_ZZZFB	0x00000090UL /* PCI base of ZZZ FB */

 /* CLUT registers */
 #define RAMDAC_INDEX		0x000000bcUL
 #define RAMDAC_DATA		0x000000c0UL

 static void e3d_clut_write(struct e3d_info *ep, int index, u32 val)
 {
 	void __iomem *ramdac = ep->ramdac;
 	unsigned long flags;

 	spin_lock_irqsave(&ep->lock, flags);

 	writel(index, ramdac + RAMDAC_INDEX);
 	writel(val, ramdac + RAMDAC_DATA);

 	spin_unlock_irqrestore(&ep->lock, flags);
 }

 static int e3d_setcolreg(unsigned regno,
 			 unsigned red, unsigned green, unsigned blue,
 			 unsigned transp, struct fb_info *info)
 {
 	struct e3d_info *ep = info->par;
 	u32 red_8, green_8, blue_8;
 	u32 red_10, green_10, blue_10;
 	u32 value;

 	if (regno >= 256)
 		return 1;

 	red_8 = red >> 8;
 	green_8 = green >> 8;
 	blue_8 = blue >> 8;

 	value = (blue_8 << 24) | (green_8 << 16) | (red_8 << 8);

 	if (info->fix.visual == FB_VISUAL_TRUECOLOR && regno < 16)
 		((u32 *)info->pseudo_palette)[regno] = value;


 	red_10 = red >> 6;
 	green_10 = green >> 6;
 	blue_10 = blue >> 6;

 	value = (blue_10 << 20) | (green_10 << 10) | (red_10 << 0);
 	e3d_clut_write(ep, regno, value);

 	return 0;
 }

 /* XXX This is a bit of a hack.  I can't figure out exactly how the
  * XXX two 8bpp areas of the framebuffer work.  I imagine there is
  * XXX a WID attribute somewhere else in the framebuffer which tells
  * XXX the ramdac which of the two 8bpp framebuffer regions to take
  * XXX the pixel from.  So, for now, render into both regions to make
  * XXX sure the pixel shows up.
  */
 static void e3d_imageblit(struct fb_info *info, const struct fb_image *image)
 {
 	struct e3d_info *ep = info->par;
 	unsigned long flags;

 	spin_lock_irqsave(&ep->lock, flags);
 	cfb_imageblit(info, image);
 	info->screen_base += ep->fb8_buf_diff;
 	cfb_imageblit(info, image);
 	info->screen_base -= ep->fb8_buf_diff;
 	spin_unlock_irqrestore(&ep->lock, flags);
 }

 static void e3d_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
 {
 	struct e3d_info *ep = info->par;
 	unsigned long flags;

 	spin_lock_irqsave(&ep->lock, flags);
 	cfb_fillrect(info, rect);
 	info->screen_base += ep->fb8_buf_diff;
 	cfb_fillrect(info, rect);
 	info->screen_base -= ep->fb8_buf_diff;
 	spin_unlock_irqrestore(&ep->lock, flags);
 }

 static void e3d_copyarea(struct fb_info *info, const struct fb_copyarea *area)
 {
 	struct e3d_info *ep = info->par;
 	unsigned long flags;

 	spin_lock_irqsave(&ep->lock, flags);
 	cfb_copyarea(info, area);
 	info->screen_base += ep->fb8_buf_diff;
 	cfb_copyarea(info, area);
 	info->screen_base -= ep->fb8_buf_diff;
 	spin_unlock_irqrestore(&ep->lock, flags);
 }

 static const struct fb_ops e3d_ops = {
 	.owner			= THIS_MODULE,
 	.fb_setcolreg		= e3d_setcolreg,
 	.fb_fillrect		= e3d_fillrect,
 	.fb_copyarea		= e3d_copyarea,
 	.fb_imageblit		= e3d_imageblit,
 };

 static int e3d_set_fbinfo(struct e3d_info *ep)
 {
 	struct fb_info *info = ep->info;
 	struct fb_var_screeninfo *var = &info->var;

 	info->flags = FBINFO_DEFAULT;
 	info->fbops = &e3d_ops;
 	info->screen_base = ep->fb_base;
 	info->screen_size = ep->fb_size;

 	info->pseudo_palette = ep->pseudo_palette;

 	/* Fill fix common fields */
 	strscpy(info->fix.id, "e3d", sizeof(info->fix.id));
         info->fix.smem_start = ep->fb_base_phys;
         info->fix.smem_len = ep->fb_size;
         info->fix.type = FB_TYPE_PACKED_PIXELS;
 	if (ep->depth == 32 || ep->depth == 24)
 		info->fix.visual = FB_VISUAL_TRUECOLOR;
 	else
 		info->fix.visual = FB_VISUAL_PSEUDOCOLOR;

 	var->xres = ep->width;
 	var->yres = ep->height;
 	var->xres_virtual = var->xres;
 	var->yres_virtual = var->yres;
 	var->bits_per_pixel = ep->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 "e3d: Cannot allocate color map.\n");
 		return -ENOMEM;
 	}

         return 0;
 }

 static int e3d_pci_register(struct pci_dev *pdev,
 			    const struct pci_device_id *ent)
 {
 	struct device_node *of_node;
 	const char *device_type;
 	struct fb_info *info;
 	struct e3d_info *ep;
 	unsigned int line_length;
 	int err;

 	err = aperture_remove_conflicting_pci_devices(pdev, "e3dfb");
 	if (err)
 		return err;

 	of_node = pci_device_to_OF_node(pdev);
 	if (!of_node) {
 		printk(KERN_ERR "e3d: Cannot find OF node of %s\n",
 		       pci_name(pdev));
 		return -ENODEV;
 	}

 	device_type = of_get_property(of_node, "device_type", NULL);
 	if (!device_type) {
 		printk(KERN_INFO "e3d: Ignoring secondary output device "
 		       "at %s\n", pci_name(pdev));
 		return -ENODEV;
 	}

 	err = pci_enable_device(pdev);
 	if (err < 0) {
 		printk(KERN_ERR "e3d: Cannot enable PCI device %s\n",
 		       pci_name(pdev));
 		goto err_out;
 	}

 	info = framebuffer_alloc(sizeof(struct e3d_info), &pdev->dev);
 	if (!info) {
 		err = -ENOMEM;
 		goto err_disable;
 	}

 	ep = info->par;
 	ep->info = info;
 	ep->pdev = pdev;
 	spin_lock_init(&ep->lock);
 	ep->of_node = of_node;

 	/* Read the PCI base register of the frame buffer, which we
 	 * need in order to interpret the RAMDAC_VID_*FB* values in
 	 * the ramdac correctly.
 	 */
 	pci_read_config_dword(pdev, PCI_BASE_ADDRESS_0,
 			      &ep->fb_base_reg);
 	ep->fb_base_reg &= PCI_BASE_ADDRESS_MEM_MASK;

 	ep->regs_base_phys = pci_resource_start (pdev, 1);
 	err = pci_request_region(pdev, 1, "e3d regs");
 	if (err < 0) {
 		printk("e3d: Cannot request region 1 for %s\n",
 		       pci_name(pdev));
 		goto err_release_fb;
 	}
 	ep->ramdac = ioremap(ep->regs_base_phys + 0x8000, 0x1000);
 	if (!ep->ramdac) {
 		err = -ENOMEM;
 		goto err_release_pci1;
 	}

 	ep->fb8_0_off = readl(ep->ramdac + RAMDAC_VID_8FB_0);
 	ep->fb8_0_off -= ep->fb_base_reg;

 	ep->fb8_1_off = readl(ep->ramdac + RAMDAC_VID_8FB_1);
 	ep->fb8_1_off -= ep->fb_base_reg;

 	ep->fb8_buf_diff = ep->fb8_1_off - ep->fb8_0_off;

 	ep->fb_base_phys = pci_resource_start (pdev, 0);
 	ep->fb_base_phys += ep->fb8_0_off;

 	err = pci_request_region(pdev, 0, "e3d framebuffer");
 	if (err < 0) {
 		printk("e3d: Cannot request region 0 for %s\n",
 		       pci_name(pdev));
 		goto err_unmap_ramdac;
 	}

 	err = e3d_get_props(ep);
 	if (err)
 		goto err_release_pci0;

 	line_length = (readl(ep->ramdac + RAMDAC_VID_CFG) >> 16) & 0xff;
 	line_length = 1 << line_length;

 	switch (ep->depth) {
 	case 8:
 		info->fix.line_length = line_length;
 		break;
 	case 16:
 		info->fix.line_length = line_length * 2;
 		break;
 	case 24:
 		info->fix.line_length = line_length * 3;
 		break;
 	case 32:
 		info->fix.line_length = line_length * 4;
 		break;
 	}
 	ep->fb_size = info->fix.line_length * ep->height;

 	ep->fb_base = ioremap(ep->fb_base_phys, ep->fb_size);
 	if (!ep->fb_base) {
 		err = -ENOMEM;
 		goto err_release_pci0;
 	}

 	err = e3d_set_fbinfo(ep);
 	if (err)
 		goto err_unmap_fb;

 	pci_set_drvdata(pdev, info);

 	printk("e3d: Found device at %s\n", pci_name(pdev));

 	err = register_framebuffer(info);
 	if (err < 0) {
 		printk(KERN_ERR "e3d: Could not register framebuffer %s\n",
 		       pci_name(pdev));
 		goto err_free_cmap;
 	}

 	return 0;

 err_free_cmap:
 	fb_dealloc_cmap(&info->cmap);

 err_unmap_fb:
 	iounmap(ep->fb_base);

 err_release_pci0:
 	pci_release_region(pdev, 0);

 err_unmap_ramdac:
 	iounmap(ep->ramdac);

 err_release_pci1:
 	pci_release_region(pdev, 1);

 err_release_fb:
         framebuffer_release(info);

 err_disable:
 	pci_disable_device(pdev);

 err_out:
 	return err;
 }

 static const struct pci_device_id e3d_pci_table[] = {
 	{	PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x7a0),	},
 	{	PCI_DEVICE(0x1091, 0x7a0),			},
 	{	PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x7a2),	},
 	{	.vendor = PCI_VENDOR_ID_3DLABS,
 		.device = PCI_ANY_ID,
 		.subvendor = PCI_VENDOR_ID_3DLABS,
 		.subdevice = 0x0108,
 	},
 	{	.vendor = PCI_VENDOR_ID_3DLABS,
 		.device = PCI_ANY_ID,
 		.subvendor = PCI_VENDOR_ID_3DLABS,
 		.subdevice = 0x0140,
 	},
 	{	.vendor = PCI_VENDOR_ID_3DLABS,
 		.device = PCI_ANY_ID,
 		.subvendor = PCI_VENDOR_ID_3DLABS,
 		.subdevice = 0x1024,
 	},
 	{ 0, }
 };

 static struct pci_driver e3d_driver = {
 	.driver = {
 		.suppress_bind_attrs = true,
 	},
 	.name		= "e3d",
 	.id_table	= e3d_pci_table,
 	.probe		= e3d_pci_register,
 };

 static int __init e3d_init(void)
 {
 	if (fb_get_options("e3d", NULL))
 		return -ENODEV;

 	return pci_register_driver(&e3d_driver);
 }
 device_initcall(e3d_init);
	/* sunxvr500.c: Sun 3DLABS XVR-500 Expert3D fb driver for sparc64 systems
	*
	* License: GPL
	*
	* Copyright (C) 2007 David S. Miller (davem@davemloft.net)
	*/

	#include <linux/aperture.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>

	/* XXX This device has a 'dev-comm' property which apparently is
	* XXX a pointer into the openfirmware's address space which is
	* XXX a shared area the kernel driver can use to keep OBP
	* XXX informed about the current resolution setting. The idea
	* XXX is that the kernel can change resolutions, and as long
	* XXX as the values in the 'dev-comm' area are accurate then
	* XXX OBP can still render text properly to the console.
	* XXX
	* XXX I'm still working out the layout of this and whether there
	* XXX are any signatures we need to look for etc.
	*/
	struct e3d_info {
	struct fb_info *info;
	struct pci_dev *pdev;

	spinlock_t lock;

	char __iomem *fb_base;
	unsigned long fb_base_phys;

	unsigned long fb8_buf_diff;
	unsigned long regs_base_phys;

	void __iomem *ramdac;

	struct device_node *of_node;

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

	u32 fb_base_reg;
	u32 fb8_0_off;
	u32 fb8_1_off;

	u32 pseudo_palette[16];
	};

	static int e3d_get_props(struct e3d_info *ep)
	{
	ep->width = of_getintprop_default(ep->of_node, "width", 0);
	ep->height = of_getintprop_default(ep->of_node, "height", 0);
	ep->depth = of_getintprop_default(ep->of_node, "depth", 8);

	if (!ep->width \|\| !ep->height) {
	printk(KERN_ERR "e3d: Critical properties missing for %s\n",
	pci_name(ep->pdev));
	return -EINVAL;
	}

	return 0;
	}

	/* My XVR-500 comes up, at 1280x768 and a FB base register value of
	* 0x04000000, the following video layout register values:
	*
	* RAMDAC_VID_WH 0x03ff04ff
	* RAMDAC_VID_CFG 0x1a0b0088
	* RAMDAC_VID_32FB_0 0x04000000
	* RAMDAC_VID_32FB_1 0x04800000
	* RAMDAC_VID_8FB_0 0x05000000
	* RAMDAC_VID_8FB_1 0x05200000
	* RAMDAC_VID_XXXFB 0x05400000
	* RAMDAC_VID_YYYFB 0x05c00000
	* RAMDAC_VID_ZZZFB 0x05e00000
	*/
	/* Video layout registers */
	#define RAMDAC_VID_WH 0x00000070UL /* (height-1)<<16 \| (width-1) */
	#define RAMDAC_VID_CFG 0x00000074UL /* 0x1a000088\|(linesz_log2<<16) */
	#define RAMDAC_VID_32FB_0 0x00000078UL /* PCI base 32bpp FB buffer 0 */
	#define RAMDAC_VID_32FB_1 0x0000007cUL /* PCI base 32bpp FB buffer 1 */
	#define RAMDAC_VID_8FB_0 0x00000080UL /* PCI base 8bpp FB buffer 0 */
	#define RAMDAC_VID_8FB_1 0x00000084UL /* PCI base 8bpp FB buffer 1 */
	#define RAMDAC_VID_XXXFB 0x00000088UL /* PCI base of XXX FB */
	#define RAMDAC_VID_YYYFB 0x0000008cUL /* PCI base of YYY FB */
	#define RAMDAC_VID_ZZZFB 0x00000090UL /* PCI base of ZZZ FB */

	/* CLUT registers */
	#define RAMDAC_INDEX 0x000000bcUL
	#define RAMDAC_DATA 0x000000c0UL

	static void e3d_clut_write(struct e3d_info *ep, int index, u32 val)
	{
	void __iomem *ramdac = ep->ramdac;
	unsigned long flags;

	spin_lock_irqsave(&ep->lock, flags);

	writel(index, ramdac + RAMDAC_INDEX);
	writel(val, ramdac + RAMDAC_DATA);

	spin_unlock_irqrestore(&ep->lock, flags);
	}

	static int e3d_setcolreg(unsigned regno,
	unsigned red, unsigned green, unsigned blue,
	unsigned transp, struct fb_info *info)
	{
	struct e3d_info *ep = info->par;
	u32 red_8, green_8, blue_8;
	u32 red_10, green_10, blue_10;
	u32 value;

	if (regno >= 256)
	return 1;

	red_8 = red >> 8;
	green_8 = green >> 8;
	blue_8 = blue >> 8;

	value = (blue_8 << 24) \| (green_8 << 16) \| (red_8 << 8);

	if (info->fix.visual == FB_VISUAL_TRUECOLOR && regno < 16)
	((u32 *)info->pseudo_palette)[regno] = value;


	red_10 = red >> 6;
	green_10 = green >> 6;
	blue_10 = blue >> 6;

	value = (blue_10 << 20) \| (green_10 << 10) \| (red_10 << 0);
	e3d_clut_write(ep, regno, value);

	return 0;
	}

	/* XXX This is a bit of a hack. I can't figure out exactly how the
	* XXX two 8bpp areas of the framebuffer work. I imagine there is
	* XXX a WID attribute somewhere else in the framebuffer which tells
	* XXX the ramdac which of the two 8bpp framebuffer regions to take
	* XXX the pixel from. So, for now, render into both regions to make
	* XXX sure the pixel shows up.
	*/
	static void e3d_imageblit(struct fb_info info, const struct fb_image image)
	{
	struct e3d_info *ep = info->par;
	unsigned long flags;

	spin_lock_irqsave(&ep->lock, flags);
	cfb_imageblit(info, image);
	info->screen_base += ep->fb8_buf_diff;
	cfb_imageblit(info, image);
	info->screen_base -= ep->fb8_buf_diff;
	spin_unlock_irqrestore(&ep->lock, flags);
	}

	static void e3d_fillrect(struct fb_info info, const struct fb_fillrect rect)
	{
	struct e3d_info *ep = info->par;
	unsigned long flags;

	spin_lock_irqsave(&ep->lock, flags);
	cfb_fillrect(info, rect);
	info->screen_base += ep->fb8_buf_diff;
	cfb_fillrect(info, rect);
	info->screen_base -= ep->fb8_buf_diff;
	spin_unlock_irqrestore(&ep->lock, flags);
	}

	static void e3d_copyarea(struct fb_info info, const struct fb_copyarea area)
	{
	struct e3d_info *ep = info->par;
	unsigned long flags;

	spin_lock_irqsave(&ep->lock, flags);
	cfb_copyarea(info, area);
	info->screen_base += ep->fb8_buf_diff;
	cfb_copyarea(info, area);
	info->screen_base -= ep->fb8_buf_diff;
	spin_unlock_irqrestore(&ep->lock, flags);
	}

	static const struct fb_ops e3d_ops = {
	.owner = THIS_MODULE,
	.fb_setcolreg = e3d_setcolreg,
	.fb_fillrect = e3d_fillrect,
	.fb_copyarea = e3d_copyarea,
	.fb_imageblit = e3d_imageblit,
	};

	static int e3d_set_fbinfo(struct e3d_info *ep)
	{
	struct fb_info *info = ep->info;
	struct fb_var_screeninfo *var = &info->var;

	info->flags = FBINFO_DEFAULT;
	info->fbops = &e3d_ops;
	info->screen_base = ep->fb_base;
	info->screen_size = ep->fb_size;

	info->pseudo_palette = ep->pseudo_palette;

	/* Fill fix common fields */
	strscpy(info->fix.id, "e3d", sizeof(info->fix.id));
	info->fix.smem_start = ep->fb_base_phys;
	info->fix.smem_len = ep->fb_size;
	info->fix.type = FB_TYPE_PACKED_PIXELS;
	if (ep->depth == 32 \|\| ep->depth == 24)
	info->fix.visual = FB_VISUAL_TRUECOLOR;
	else
	info->fix.visual = FB_VISUAL_PSEUDOCOLOR;

	var->xres = ep->width;
	var->yres = ep->height;
	var->xres_virtual = var->xres;
	var->yres_virtual = var->yres;
	var->bits_per_pixel = ep->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 "e3d: Cannot allocate color map.\n");
	return -ENOMEM;
	}

	return 0;
	}

	static int e3d_pci_register(struct pci_dev *pdev,
	const struct pci_device_id *ent)
	{
	struct device_node *of_node;
	const char *device_type;
	struct fb_info *info;
	struct e3d_info *ep;
	unsigned int line_length;
	int err;

	err = aperture_remove_conflicting_pci_devices(pdev, "e3dfb");
	if (err)
	return err;

	of_node = pci_device_to_OF_node(pdev);
	if (!of_node) {
	printk(KERN_ERR "e3d: Cannot find OF node of %s\n",
	pci_name(pdev));
	return -ENODEV;
	}

	device_type = of_get_property(of_node, "device_type", NULL);
	if (!device_type) {
	printk(KERN_INFO "e3d: Ignoring secondary output device "
	"at %s\n", pci_name(pdev));
	return -ENODEV;
	}

	err = pci_enable_device(pdev);
	if (err < 0) {
	printk(KERN_ERR "e3d: Cannot enable PCI device %s\n",
	pci_name(pdev));
	goto err_out;
	}

	info = framebuffer_alloc(sizeof(struct e3d_info), &pdev->dev);
	if (!info) {
	err = -ENOMEM;
	goto err_disable;
	}

	ep = info->par;
	ep->info = info;
	ep->pdev = pdev;
	spin_lock_init(&ep->lock);
	ep->of_node = of_node;

	/* Read the PCI base register of the frame buffer, which we
	* need in order to interpret the RAMDAC_VID_FB values in
	* the ramdac correctly.
	*/
	pci_read_config_dword(pdev, PCI_BASE_ADDRESS_0,
	&ep->fb_base_reg);
	ep->fb_base_reg &= PCI_BASE_ADDRESS_MEM_MASK;

	ep->regs_base_phys = pci_resource_start (pdev, 1);
	err = pci_request_region(pdev, 1, "e3d regs");
	if (err < 0) {
	printk("e3d: Cannot request region 1 for %s\n",
	pci_name(pdev));
	goto err_release_fb;
	}
	ep->ramdac = ioremap(ep->regs_base_phys + 0x8000, 0x1000);
	if (!ep->ramdac) {
	err = -ENOMEM;
	goto err_release_pci1;
	}

	ep->fb8_0_off = readl(ep->ramdac + RAMDAC_VID_8FB_0);
	ep->fb8_0_off -= ep->fb_base_reg;

	ep->fb8_1_off = readl(ep->ramdac + RAMDAC_VID_8FB_1);
	ep->fb8_1_off -= ep->fb_base_reg;

	ep->fb8_buf_diff = ep->fb8_1_off - ep->fb8_0_off;

	ep->fb_base_phys = pci_resource_start (pdev, 0);
	ep->fb_base_phys += ep->fb8_0_off;

	err = pci_request_region(pdev, 0, "e3d framebuffer");
	if (err < 0) {
	printk("e3d: Cannot request region 0 for %s\n",
	pci_name(pdev));
	goto err_unmap_ramdac;
	}

	err = e3d_get_props(ep);
	if (err)
	goto err_release_pci0;

	line_length = (readl(ep->ramdac + RAMDAC_VID_CFG) >> 16) & 0xff;
	line_length = 1 << line_length;

	switch (ep->depth) {
	case 8:
	info->fix.line_length = line_length;
	break;
	case 16:
	info->fix.line_length = line_length * 2;
	break;
	case 24:
	info->fix.line_length = line_length * 3;
	break;
	case 32:
	info->fix.line_length = line_length * 4;
	break;
	}
	ep->fb_size = info->fix.line_length * ep->height;

	ep->fb_base = ioremap(ep->fb_base_phys, ep->fb_size);
	if (!ep->fb_base) {
	err = -ENOMEM;
	goto err_release_pci0;
	}

	err = e3d_set_fbinfo(ep);
	if (err)
	goto err_unmap_fb;

	pci_set_drvdata(pdev, info);

	printk("e3d: Found device at %s\n", pci_name(pdev));

	err = register_framebuffer(info);
	if (err < 0) {
	printk(KERN_ERR "e3d: Could not register framebuffer %s\n",
	pci_name(pdev));
	goto err_free_cmap;
	}

	return 0;

	err_free_cmap:
	fb_dealloc_cmap(&info->cmap);

	err_unmap_fb:
	iounmap(ep->fb_base);

	err_release_pci0:
	pci_release_region(pdev, 0);

	err_unmap_ramdac:
	iounmap(ep->ramdac);

	err_release_pci1:
	pci_release_region(pdev, 1);

	err_release_fb:
	framebuffer_release(info);

	err_disable:
	pci_disable_device(pdev);

	err_out:
	return err;
	}

	static const struct pci_device_id e3d_pci_table[] = {
	{ PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x7a0), },
	{ PCI_DEVICE(0x1091, 0x7a0), },
	{ PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x7a2), },
	{ .vendor = PCI_VENDOR_ID_3DLABS,
	.device = PCI_ANY_ID,
	.subvendor = PCI_VENDOR_ID_3DLABS,
	.subdevice = 0x0108,
	},
	{ .vendor = PCI_VENDOR_ID_3DLABS,
	.device = PCI_ANY_ID,
	.subvendor = PCI_VENDOR_ID_3DLABS,
	.subdevice = 0x0140,
	},
	{ .vendor = PCI_VENDOR_ID_3DLABS,
	.device = PCI_ANY_ID,
	.subvendor = PCI_VENDOR_ID_3DLABS,
	.subdevice = 0x1024,
	},
	{ 0, }
	};

	static struct pci_driver e3d_driver = {
	.driver = {
	.suppress_bind_attrs = true,
	},
	.name = "e3d",
	.id_table = e3d_pci_table,
	.probe = e3d_pci_register,
	};

	static int __init e3d_init(void)
	{
	if (fb_get_options("e3d", NULL))
	return -ENODEV;

	return pci_register_driver(&e3d_driver);
	}
	device_initcall(e3d_init);