drivers/video/fbdev/p9100.c - third_party/linux - Git at Google


            
            /* p9100.c: P9100 frame buffer driver

            
             *

            
             * Copyright (C) 2003, 2006 David S. Miller (davem@davemloft.net)

            
             * Copyright 1999 Derrick J Brashear (shadow@dementia.org)

            
             *

            
             * Driver layout based loosely on tgafb.c, see that file for credits.

            
             */


            #include <linux/module.h>

            
            #include <linux/kernel.h>

            
            #include <linux/errno.h>

            
            #include <linux/string.h>

            
            #include <linux/delay.h>

            
            #include <linux/init.h>

            
            #include <linux/fb.h>

            
            #include <linux/mm.h>

            
            #include <linux/of_device.h>


            #include <asm/io.h>

            
            #include <asm/fbio.h>


            #include "sbuslib.h"


            /*

            
             * Local functions.

            
             */


            static int p9100_setcolreg(unsigned, unsigned, unsigned, unsigned,

            
            			   unsigned, struct fb_info *);

            
            static int p9100_blank(int, struct fb_info *);


            static int p9100_mmap(struct fb_info *, struct vm_area_struct *);

            
            static int p9100_ioctl(struct fb_info *, unsigned int, unsigned long);


            /*

            
             *  Frame buffer operations

            
             */


            static struct fb_ops p9100_ops = {

            
            	.owner			= THIS_MODULE,

            
            	.fb_setcolreg		= p9100_setcolreg,

            
            	.fb_blank		= p9100_blank,

            
            	.fb_fillrect		= cfb_fillrect,

            
            	.fb_copyarea		= cfb_copyarea,

            
            	.fb_imageblit		= cfb_imageblit,

            
            	.fb_mmap		= p9100_mmap,

            
            	.fb_ioctl		= p9100_ioctl,

            
            #ifdef CONFIG_COMPAT

            
            	.fb_compat_ioctl	= sbusfb_compat_ioctl,

            
            #endif

            
            };


            /* P9100 control registers */

            
            #define P9100_SYSCTL_OFF	0x0UL

            
            #define P9100_VIDEOCTL_OFF	0x100UL

            
            #define P9100_VRAMCTL_OFF 	0x180UL

            
            #define P9100_RAMDAC_OFF 	0x200UL

            
            #define P9100_VIDEOCOPROC_OFF 	0x400UL


            /* P9100 command registers */

            
            #define P9100_CMD_OFF 0x0UL


            /* P9100 framebuffer memory */

            
            #define P9100_FB_OFF 0x0UL


            /* 3 bits: 2=8bpp 3=16bpp 5=32bpp 7=24bpp */

            
            #define SYS_CONFIG_PIXELSIZE_SHIFT 26


            #define SCREENPAINT_TIMECTL1_ENABLE_VIDEO 0x20 /* 0 = off, 1 = on */


            struct p9100_regs {

            
            	/* Registers for the system control */

            
            	u32 sys_base;

            
            	u32 sys_config;

            
            	u32 sys_intr;

            
            	u32 sys_int_ena;

            
            	u32 sys_alt_rd;

            
            	u32 sys_alt_wr;

            
            	u32 sys_xxx[58];


            	/* Registers for the video control */

            
            	u32 vid_base;

            
            	u32 vid_hcnt;

            
            	u32 vid_htotal;

            
            	u32 vid_hsync_rise;

            
            	u32 vid_hblank_rise;

            
            	u32 vid_hblank_fall;

            
            	u32 vid_hcnt_preload;

            
            	u32 vid_vcnt;

            
            	u32 vid_vlen;

            
            	u32 vid_vsync_rise;

            
            	u32 vid_vblank_rise;

            
            	u32 vid_vblank_fall;

            
            	u32 vid_vcnt_preload;

            
            	u32 vid_screenpaint_addr;

            
            	u32 vid_screenpaint_timectl1;

            
            	u32 vid_screenpaint_qsfcnt;

            
            	u32 vid_screenpaint_timectl2;

            
            	u32 vid_xxx[15];


            	/* Registers for the video control */

            
            	u32 vram_base;

            
            	u32 vram_memcfg;

            
            	u32 vram_refresh_pd;

            
            	u32 vram_refresh_cnt;

            
            	u32 vram_raslo_max;

            
            	u32 vram_raslo_cur;

            
            	u32 pwrup_cfg;

            
            	u32 vram_xxx[25];


            	/* Registers for IBM RGB528 Palette */

            
            	u32 ramdac_cmap_wridx;

            
            	u32 ramdac_palette_data;

            
            	u32 ramdac_pixel_mask;

            
            	u32 ramdac_palette_rdaddr;

            
            	u32 ramdac_idx_lo;

            
            	u32 ramdac_idx_hi;

            
            	u32 ramdac_idx_data;

            
            	u32 ramdac_idx_ctl;

            
            	u32 ramdac_xxx[1784];

            
            };


            struct p9100_cmd_parameng {

            
            	u32 parameng_status;

            
            	u32 parameng_bltcmd;

            
            	u32 parameng_quadcmd;

            
            };


            struct p9100_par {

            
            	spinlock_t		lock;

            
            	struct p9100_regs	__iomem *regs;


            	u32			flags;

            
            #define P9100_FLAG_BLANKED	0x00000001


            	unsigned long		which_io;

            
            };


            /**

            
             *      p9100_setcolreg - Optional function. Sets a color register.

            
             *      @regno: boolean, 0 copy local, 1 get_user() function

            
             *      @red: frame buffer colormap structure

            
             *      @green: The green value which can be up to 16 bits wide

            
             *      @blue:  The blue value which can be up to 16 bits wide.

            
             *      @transp: If supported the alpha value which can be up to 16 bits wide.

            
             *      @info: frame buffer info structure

            
             */

            
            static int p9100_setcolreg(unsigned regno,

            
            			   unsigned red, unsigned green, unsigned blue,

            
            			   unsigned transp, struct fb_info *info)

            
            {

            
            	struct p9100_par *par = (struct p9100_par *) info->par;

            
            	struct p9100_regs __iomem *regs = par->regs;

            
            	unsigned long flags;


            	if (regno >= 256)

            
            		return 1;


            	red >>= 8;

            
            	green >>= 8;

            
            	blue >>= 8;


            	spin_lock_irqsave(&par->lock, flags);


            	sbus_writel((regno << 16), &regs->ramdac_cmap_wridx);

            
            	sbus_writel((red << 16), &regs->ramdac_palette_data);

            
            	sbus_writel((green << 16), &regs->ramdac_palette_data);

            
            	sbus_writel((blue << 16), &regs->ramdac_palette_data);


            	spin_unlock_irqrestore(&par->lock, flags);


            	return 0;

            
            }


            /**

            
             *      p9100_blank - Optional function.  Blanks the display.

            
             *      @blank_mode: the blank mode we want.

            
             *      @info: frame buffer structure that represents a single frame buffer

            
             */

            
            static int

            
            p9100_blank(int blank, struct fb_info *info)

            
            {

            
            	struct p9100_par *par = (struct p9100_par *) info->par;

            
            	struct p9100_regs __iomem *regs = par->regs;

            
            	unsigned long flags;

            
            	u32 val;


            	spin_lock_irqsave(&par->lock, flags);


            	switch (blank) {

            
            	case FB_BLANK_UNBLANK: /* Unblanking */

            
            		val = sbus_readl(&regs->vid_screenpaint_timectl1);

            
            		val |= SCREENPAINT_TIMECTL1_ENABLE_VIDEO;

            
            		sbus_writel(val, &regs->vid_screenpaint_timectl1);

            
            		par->flags &= ~P9100_FLAG_BLANKED;

            
            		break;


            	case FB_BLANK_NORMAL: /* Normal blanking */

            
            	case FB_BLANK_VSYNC_SUSPEND: /* VESA blank (vsync off) */

            
            	case FB_BLANK_HSYNC_SUSPEND: /* VESA blank (hsync off) */

            
            	case FB_BLANK_POWERDOWN: /* Poweroff */

            
            		val = sbus_readl(&regs->vid_screenpaint_timectl1);

            
            		val &= ~SCREENPAINT_TIMECTL1_ENABLE_VIDEO;

            
            		sbus_writel(val, &regs->vid_screenpaint_timectl1);

            
            		par->flags |= P9100_FLAG_BLANKED;

            
            		break;

            
            	}


            	spin_unlock_irqrestore(&par->lock, flags);


            	return 0;

            
            }


            static struct sbus_mmap_map p9100_mmap_map[] = {

            
            	{ CG3_MMAP_OFFSET,	0,		SBUS_MMAP_FBSIZE(1) },

            
            	{ 0,			0,		0		    }

            
            };


            static int p9100_mmap(struct fb_info *info, struct vm_area_struct *vma)

            
            {

            
            	struct p9100_par *par = (struct p9100_par *)info->par;


            	return sbusfb_mmap_helper(p9100_mmap_map,

            
            				  info->fix.smem_start, info->fix.smem_len,

            
            				  par->which_io, vma);

            
            }


            static int p9100_ioctl(struct fb_info *info, unsigned int cmd,

            
            		       unsigned long arg)

            
            {

            
            	/* Make it look like a cg3. */

            
            	return sbusfb_ioctl_helper(cmd, arg, info,

            
            				   FBTYPE_SUN3COLOR, 8, info->fix.smem_len);

            
            }


            /*

            
             *  Initialisation

            
             */


            static void p9100_init_fix(struct fb_info *info, int linebytes, struct device_node *dp)

            
            {

            
            	strlcpy(info->fix.id, dp->name, sizeof(info->fix.id));


            	info->fix.type = FB_TYPE_PACKED_PIXELS;

            
            	info->fix.visual = FB_VISUAL_PSEUDOCOLOR;


            	info->fix.line_length = linebytes;


            	info->fix.accel = FB_ACCEL_SUN_CGTHREE;

            
            }


            static int p9100_probe(struct platform_device *op)

            
            {

            
            	struct device_node *dp = op->dev.of_node;

            
            	struct fb_info *info;

            
            	struct p9100_par *par;

            
            	int linebytes, err;


            	info = framebuffer_alloc(sizeof(struct p9100_par), &op->dev);


            	err = -ENOMEM;

            
            	if (!info)

            
            		goto out_err;

            
            	par = info->par;


            	spin_lock_init(&par->lock);


            	/* This is the framebuffer and the only resource apps can mmap.  */

            
            	info->fix.smem_start = op->resource[2].start;

            
            	par->which_io = op->resource[2].flags & IORESOURCE_BITS;


            	sbusfb_fill_var(&info->var, dp, 8);

            
            	info->var.red.length = 8;

            
            	info->var.green.length = 8;

            
            	info->var.blue.length = 8;


            	linebytes = of_getintprop_default(dp, "linebytes", info->var.xres);

            
            	info->fix.smem_len = PAGE_ALIGN(linebytes * info->var.yres);


            	par->regs = of_ioremap(&op->resource[0], 0,

            
            			       sizeof(struct p9100_regs), "p9100 regs");

            
            	if (!par->regs)

            
            		goto out_release_fb;


            	info->flags = FBINFO_DEFAULT;

            
            	info->fbops = &p9100_ops;

            
            	info->screen_base = of_ioremap(&op->resource[2], 0,

            
            				       info->fix.smem_len, "p9100 ram");

            
            	if (!info->screen_base)

            
            		goto out_unmap_regs;


            	p9100_blank(FB_BLANK_UNBLANK, info);


            	if (fb_alloc_cmap(&info->cmap, 256, 0))

            
            		goto out_unmap_screen;


            	p9100_init_fix(info, linebytes, dp);


            	err = register_framebuffer(info);

            
            	if (err < 0)

            
            		goto out_dealloc_cmap;


            	fb_set_cmap(&info->cmap, info);


            	dev_set_drvdata(&op->dev, info);


            	printk(KERN_INFO "%pOF: p9100 at %lx:%lx\n",

            
            	       dp,

            
            	       par->which_io, info->fix.smem_start);


            	return 0;


            out_dealloc_cmap:

            
            	fb_dealloc_cmap(&info->cmap);


            out_unmap_screen:

            
            	of_iounmap(&op->resource[2], info->screen_base, info->fix.smem_len);


            out_unmap_regs:

            
            	of_iounmap(&op->resource[0], par->regs, sizeof(struct p9100_regs));


            out_release_fb:

            
            	framebuffer_release(info);


            out_err:

            
            	return err;

            
            }


            static int p9100_remove(struct platform_device *op)

            
            {

            
            	struct fb_info *info = dev_get_drvdata(&op->dev);

            
            	struct p9100_par *par = info->par;


            	unregister_framebuffer(info);

            
            	fb_dealloc_cmap(&info->cmap);


            	of_iounmap(&op->resource[0], par->regs, sizeof(struct p9100_regs));

            
            	of_iounmap(&op->resource[2], info->screen_base, info->fix.smem_len);


            	framebuffer_release(info);


            	return 0;

            
            }


            static const struct of_device_id p9100_match[] = {

            
            	{

            
            		.name = "p9100",

            
            	},

            
            	{},

            
            };

            
            MODULE_DEVICE_TABLE(of, p9100_match);


            static struct platform_driver p9100_driver = {

            
            	.driver = {

            
            		.name = "p9100",

            
            		.of_match_table = p9100_match,

            
            	},

            
            	.probe		= p9100_probe,

            
            	.remove		= p9100_remove,

            
            };


            static int __init p9100_init(void)

            
            {

            
            	if (fb_get_options("p9100fb", NULL))

            
            		return -ENODEV;


            	return platform_driver_register(&p9100_driver);

            
            }


            static void __exit p9100_exit(void)

            
            {

            
            	platform_driver_unregister(&p9100_driver);

            
            }


            module_init(p9100_init);

            
            module_exit(p9100_exit);


            MODULE_DESCRIPTION("framebuffer driver for P9100 chipsets");

            
            MODULE_AUTHOR("David S. Miller <davem@davemloft.net>");

            
            MODULE_VERSION("2.0");

            
            MODULE_LICENSE("GPL");
	/* p9100.c: P9100 frame buffer driver
	*
	* Copyright (C) 2003, 2006 David S. Miller (davem@davemloft.net)
	* Copyright 1999 Derrick J Brashear (shadow@dementia.org)
	*
	* Driver layout based loosely on tgafb.c, see that file for credits.
	*/

	#include <linux/module.h>
	#include <linux/kernel.h>
	#include <linux/errno.h>
	#include <linux/string.h>
	#include <linux/delay.h>
	#include <linux/init.h>
	#include <linux/fb.h>
	#include <linux/mm.h>
	#include <linux/of_device.h>

	#include <asm/io.h>
	#include <asm/fbio.h>

	#include "sbuslib.h"

	/*
	* Local functions.
	*/

	static int p9100_setcolreg(unsigned, unsigned, unsigned, unsigned,
	unsigned, struct fb_info *);
	static int p9100_blank(int, struct fb_info *);

	static int p9100_mmap(struct fb_info , struct vm_area_struct );
	static int p9100_ioctl(struct fb_info *, unsigned int, unsigned long);

	/*
	* Frame buffer operations
	*/

	static struct fb_ops p9100_ops = {
	.owner = THIS_MODULE,
	.fb_setcolreg = p9100_setcolreg,
	.fb_blank = p9100_blank,
	.fb_fillrect = cfb_fillrect,
	.fb_copyarea = cfb_copyarea,
	.fb_imageblit = cfb_imageblit,
	.fb_mmap = p9100_mmap,
	.fb_ioctl = p9100_ioctl,
	#ifdef CONFIG_COMPAT
	.fb_compat_ioctl = sbusfb_compat_ioctl,
	#endif
	};

	/* P9100 control registers */
	#define P9100_SYSCTL_OFF 0x0UL
	#define P9100_VIDEOCTL_OFF 0x100UL
	#define P9100_VRAMCTL_OFF 0x180UL
	#define P9100_RAMDAC_OFF 0x200UL
	#define P9100_VIDEOCOPROC_OFF 0x400UL

	/* P9100 command registers */
	#define P9100_CMD_OFF 0x0UL

	/* P9100 framebuffer memory */
	#define P9100_FB_OFF 0x0UL

	/* 3 bits: 2=8bpp 3=16bpp 5=32bpp 7=24bpp */
	#define SYS_CONFIG_PIXELSIZE_SHIFT 26

	#define SCREENPAINT_TIMECTL1_ENABLE_VIDEO 0x20 /* 0 = off, 1 = on */

	struct p9100_regs {
	/* Registers for the system control */
	u32 sys_base;
	u32 sys_config;
	u32 sys_intr;
	u32 sys_int_ena;
	u32 sys_alt_rd;
	u32 sys_alt_wr;
	u32 sys_xxx[58];

	/* Registers for the video control */
	u32 vid_base;
	u32 vid_hcnt;
	u32 vid_htotal;
	u32 vid_hsync_rise;
	u32 vid_hblank_rise;
	u32 vid_hblank_fall;
	u32 vid_hcnt_preload;
	u32 vid_vcnt;
	u32 vid_vlen;
	u32 vid_vsync_rise;
	u32 vid_vblank_rise;
	u32 vid_vblank_fall;
	u32 vid_vcnt_preload;
	u32 vid_screenpaint_addr;
	u32 vid_screenpaint_timectl1;
	u32 vid_screenpaint_qsfcnt;
	u32 vid_screenpaint_timectl2;
	u32 vid_xxx[15];

	/* Registers for the video control */
	u32 vram_base;
	u32 vram_memcfg;
	u32 vram_refresh_pd;
	u32 vram_refresh_cnt;
	u32 vram_raslo_max;
	u32 vram_raslo_cur;
	u32 pwrup_cfg;
	u32 vram_xxx[25];

	/* Registers for IBM RGB528 Palette */
	u32 ramdac_cmap_wridx;
	u32 ramdac_palette_data;
	u32 ramdac_pixel_mask;
	u32 ramdac_palette_rdaddr;
	u32 ramdac_idx_lo;
	u32 ramdac_idx_hi;
	u32 ramdac_idx_data;
	u32 ramdac_idx_ctl;
	u32 ramdac_xxx[1784];
	};

	struct p9100_cmd_parameng {
	u32 parameng_status;
	u32 parameng_bltcmd;
	u32 parameng_quadcmd;
	};

	struct p9100_par {
	spinlock_t lock;
	struct p9100_regs __iomem *regs;

	u32 flags;
	#define P9100_FLAG_BLANKED 0x00000001

	unsigned long which_io;
	};

	/**
	* p9100_setcolreg - Optional function. Sets a color register.
	* @regno: boolean, 0 copy local, 1 get_user() function
	* @red: frame buffer colormap structure
	* @green: The green value which can be up to 16 bits wide
	* @blue: The blue value which can be up to 16 bits wide.
	* @transp: If supported the alpha value which can be up to 16 bits wide.
	* @info: frame buffer info structure
	*/
	static int p9100_setcolreg(unsigned regno,
	unsigned red, unsigned green, unsigned blue,
	unsigned transp, struct fb_info *info)
	{
	struct p9100_par par = (struct p9100_par ) info->par;
	struct p9100_regs __iomem *regs = par->regs;
	unsigned long flags;

	if (regno >= 256)
	return 1;

	red >>= 8;
	green >>= 8;
	blue >>= 8;

	spin_lock_irqsave(&par->lock, flags);

	sbus_writel((regno << 16), &regs->ramdac_cmap_wridx);
	sbus_writel((red << 16), &regs->ramdac_palette_data);
	sbus_writel((green << 16), &regs->ramdac_palette_data);
	sbus_writel((blue << 16), &regs->ramdac_palette_data);

	spin_unlock_irqrestore(&par->lock, flags);

	return 0;
	}

	/**
	* p9100_blank - Optional function. Blanks the display.
	* @blank_mode: the blank mode we want.
	* @info: frame buffer structure that represents a single frame buffer
	*/
	static int
	p9100_blank(int blank, struct fb_info *info)
	{
	struct p9100_par par = (struct p9100_par ) info->par;
	struct p9100_regs __iomem *regs = par->regs;
	unsigned long flags;
	u32 val;

	spin_lock_irqsave(&par->lock, flags);

	switch (blank) {
	case FB_BLANK_UNBLANK: /* Unblanking */
	val = sbus_readl(&regs->vid_screenpaint_timectl1);
	val \|= SCREENPAINT_TIMECTL1_ENABLE_VIDEO;
	sbus_writel(val, &regs->vid_screenpaint_timectl1);
	par->flags &= ~P9100_FLAG_BLANKED;
	break;

	case FB_BLANK_NORMAL: /* Normal blanking */
	case FB_BLANK_VSYNC_SUSPEND: /* VESA blank (vsync off) */
	case FB_BLANK_HSYNC_SUSPEND: /* VESA blank (hsync off) */
	case FB_BLANK_POWERDOWN: /* Poweroff */
	val = sbus_readl(&regs->vid_screenpaint_timectl1);
	val &= ~SCREENPAINT_TIMECTL1_ENABLE_VIDEO;
	sbus_writel(val, &regs->vid_screenpaint_timectl1);
	par->flags \|= P9100_FLAG_BLANKED;
	break;
	}

	spin_unlock_irqrestore(&par->lock, flags);

	return 0;
	}

	static struct sbus_mmap_map p9100_mmap_map[] = {
	{ CG3_MMAP_OFFSET, 0, SBUS_MMAP_FBSIZE(1) },
	{ 0, 0, 0 }
	};

	static int p9100_mmap(struct fb_info info, struct vm_area_struct vma)
	{
	struct p9100_par par = (struct p9100_par )info->par;

	return sbusfb_mmap_helper(p9100_mmap_map,
	info->fix.smem_start, info->fix.smem_len,
	par->which_io, vma);
	}

	static int p9100_ioctl(struct fb_info *info, unsigned int cmd,
	unsigned long arg)
	{
	/* Make it look like a cg3. */
	return sbusfb_ioctl_helper(cmd, arg, info,
	FBTYPE_SUN3COLOR, 8, info->fix.smem_len);
	}

	/*
	* Initialisation
	*/

	static void p9100_init_fix(struct fb_info info, int linebytes, struct device_node dp)
	{
	strlcpy(info->fix.id, dp->name, sizeof(info->fix.id));

	info->fix.type = FB_TYPE_PACKED_PIXELS;
	info->fix.visual = FB_VISUAL_PSEUDOCOLOR;

	info->fix.line_length = linebytes;

	info->fix.accel = FB_ACCEL_SUN_CGTHREE;
	}

	static int p9100_probe(struct platform_device *op)
	{
	struct device_node *dp = op->dev.of_node;
	struct fb_info *info;
	struct p9100_par *par;
	int linebytes, err;

	info = framebuffer_alloc(sizeof(struct p9100_par), &op->dev);

	err = -ENOMEM;
	if (!info)
	goto out_err;
	par = info->par;

	spin_lock_init(&par->lock);

	/* This is the framebuffer and the only resource apps can mmap. */
	info->fix.smem_start = op->resource[2].start;
	par->which_io = op->resource[2].flags & IORESOURCE_BITS;

	sbusfb_fill_var(&info->var, dp, 8);
	info->var.red.length = 8;
	info->var.green.length = 8;
	info->var.blue.length = 8;

	linebytes = of_getintprop_default(dp, "linebytes", info->var.xres);
	info->fix.smem_len = PAGE_ALIGN(linebytes * info->var.yres);

	par->regs = of_ioremap(&op->resource[0], 0,
	sizeof(struct p9100_regs), "p9100 regs");
	if (!par->regs)
	goto out_release_fb;

	info->flags = FBINFO_DEFAULT;
	info->fbops = &p9100_ops;
	info->screen_base = of_ioremap(&op->resource[2], 0,
	info->fix.smem_len, "p9100 ram");
	if (!info->screen_base)
	goto out_unmap_regs;

	p9100_blank(FB_BLANK_UNBLANK, info);

	if (fb_alloc_cmap(&info->cmap, 256, 0))
	goto out_unmap_screen;

	p9100_init_fix(info, linebytes, dp);

	err = register_framebuffer(info);
	if (err < 0)
	goto out_dealloc_cmap;

	fb_set_cmap(&info->cmap, info);

	dev_set_drvdata(&op->dev, info);

	printk(KERN_INFO "%pOF: p9100 at %lx:%lx\n",
	dp,
	par->which_io, info->fix.smem_start);

	return 0;

	out_dealloc_cmap:
	fb_dealloc_cmap(&info->cmap);

	out_unmap_screen:
	of_iounmap(&op->resource[2], info->screen_base, info->fix.smem_len);

	out_unmap_regs:
	of_iounmap(&op->resource[0], par->regs, sizeof(struct p9100_regs));

	out_release_fb:
	framebuffer_release(info);

	out_err:
	return err;
	}

	static int p9100_remove(struct platform_device *op)
	{
	struct fb_info *info = dev_get_drvdata(&op->dev);
	struct p9100_par *par = info->par;

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

	of_iounmap(&op->resource[0], par->regs, sizeof(struct p9100_regs));
	of_iounmap(&op->resource[2], info->screen_base, info->fix.smem_len);

	framebuffer_release(info);

	return 0;
	}

	static const struct of_device_id p9100_match[] = {
	{
	.name = "p9100",
	},
	{},
	};
	MODULE_DEVICE_TABLE(of, p9100_match);

	static struct platform_driver p9100_driver = {
	.driver = {
	.name = "p9100",
	.of_match_table = p9100_match,
	},
	.probe = p9100_probe,
	.remove = p9100_remove,
	};

	static int __init p9100_init(void)
	{
	if (fb_get_options("p9100fb", NULL))
	return -ENODEV;

	return platform_driver_register(&p9100_driver);
	}

	static void __exit p9100_exit(void)
	{
	platform_driver_unregister(&p9100_driver);
	}

	module_init(p9100_init);
	module_exit(p9100_exit);

	MODULE_DESCRIPTION("framebuffer driver for P9100 chipsets");
	MODULE_AUTHOR("David S. Miller <davem@davemloft.net>");
	MODULE_VERSION("2.0");
	MODULE_LICENSE("GPL");