drivers/video/p9100.c - maze/linux - Git at Google

 /* p9100.c: P9100 frame buffer driver
  *
  * Copyright (C) 2003 David S. Miller (davem@redhat.com)
  * 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/slab.h>
 #include <linux/delay.h>
 #include <linux/init.h>
 #include <linux/fb.h>
 #include <linux/mm.h>

 #include <asm/io.h>
 #include <asm/sbus.h>
 #include <asm/oplib.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 file *, struct vm_area_struct *);
 static int p9100_ioctl(struct inode *, struct file *, unsigned int,
 		       unsigned long, struct fb_info *);

 /*
  *  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,
 };

 /* 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 */
 	volatile u32 sys_base;
 	volatile u32 sys_config;
 	volatile u32 sys_intr;
 	volatile u32 sys_int_ena;
 	volatile u32 sys_alt_rd;
 	volatile u32 sys_alt_wr;
 	volatile u32 sys_xxx[58];

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

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

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

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

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

 	u32			flags;
 #define P9100_FLAG_BLANKED	0x00000001

 	unsigned long		physbase;
 	unsigned long		fbsize;

 	struct sbus_dev		*sdev;
 	struct list_head	list;
 };

 /**
  *      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 file *file, struct vm_area_struct *vma)
 {
 	struct p9100_par *par = (struct p9100_par *)info->par;

 	return sbusfb_mmap_helper(p9100_mmap_map,
 				  par->physbase, par->fbsize,
 				  par->sdev->reg_addrs[0].which_io,
 				  vma);
 }

 static int p9100_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
 		       unsigned long arg, struct fb_info *info)
 {
 	struct p9100_par *par = (struct p9100_par *) info->par;

 	/* Make it look like a cg3. */
 	return sbusfb_ioctl_helper(cmd, arg, info,
 				   FBTYPE_SUN3COLOR, 8, par->fbsize);
 }

 /*
  *  Initialisation
  */

 static void
 p9100_init_fix(struct fb_info *info, int linebytes)
 {
 	struct p9100_par *par = (struct p9100_par *)info->par;

 	strlcpy(info->fix.id, par->sdev->prom_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;
 }

 struct all_info {
 	struct fb_info info;
 	struct p9100_par par;
 	struct list_head list;
 };
 static LIST_HEAD(p9100_list);

 static void p9100_init_one(struct sbus_dev *sdev)
 {
 	struct all_info *all;
 	int linebytes;

 	all = kmalloc(sizeof(*all), GFP_KERNEL);
 	if (!all) {
 		printk(KERN_ERR "p9100: Cannot allocate memory.\n");
 		return;
 	}
 	memset(all, 0, sizeof(*all));

 	INIT_LIST_HEAD(&all->list);

 	spin_lock_init(&all->par.lock);
 	all->par.sdev = sdev;

 	/* This is the framebuffer and the only resource apps can mmap.  */
 	all->par.physbase = sdev->reg_addrs[2].phys_addr;

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

 	linebytes = prom_getintdefault(sdev->prom_node, "linebytes",
 				       all->info.var.xres);
 	all->par.fbsize = PAGE_ALIGN(linebytes * all->info.var.yres);

 	all->par.regs = sbus_ioremap(&sdev->resource[0], 0,
 			     sizeof(struct p9100_regs), "p9100 regs");

 	all->info.flags = FBINFO_DEFAULT;
 	all->info.fbops = &p9100_ops;
 #ifdef CONFIG_SPARC32
 	all->info.screen_base = (char __iomem *)
 		prom_getintdefault(sdev->prom_node, "address", 0);
 #endif
 	if (!all->info.screen_base)
 		all->info.screen_base = sbus_ioremap(&sdev->resource[2], 0,
 				     all->par.fbsize, "p9100 ram");
 	all->info.par = &all->par;

 	p9100_blank(0, &all->info);

 	if (fb_alloc_cmap(&all->info.cmap, 256, 0)) {
 		printk(KERN_ERR "p9100: Could not allocate color map.\n");
 		kfree(all);
 		return;
 	}

 	p9100_init_fix(&all->info, linebytes);

 	if (register_framebuffer(&all->info) < 0) {
 		printk(KERN_ERR "p9100: Could not register framebuffer.\n");
 		fb_dealloc_cmap(&all->info.cmap);
 		kfree(all);
 		return;
 	}
 	fb_set_cmap(&all->info.cmap, &all->info);

 	list_add(&all->list, &p9100_list);

 	printk("p9100: %s at %lx:%lx\n",
 	       sdev->prom_name,
 	       (long) sdev->reg_addrs[0].which_io,
 	       (long) sdev->reg_addrs[0].phys_addr);
 }

 int __init p9100_init(void)
 {
 	struct sbus_bus *sbus;
 	struct sbus_dev *sdev;

 	if (fb_get_options("p9100fb", NULL))
 		return -ENODEV;

 	for_all_sbusdev(sdev, sbus) {
 		if (!strcmp(sdev->prom_name, "p9100"))
 			p9100_init_one(sdev);
 	}

 	return 0;
 }

 void __exit p9100_exit(void)
 {
 	struct list_head *pos, *tmp;

 	list_for_each_safe(pos, tmp, &p9100_list) {
 		struct all_info *all = list_entry(pos, typeof(*all), list);

 		unregister_framebuffer(&all->info);
 		fb_dealloc_cmap(&all->info.cmap);
 		kfree(all);
 	}
 }

 int __init
 p9100_setup(char *arg)
 {
 	/* No cmdline options yet... */
 	return 0;
 }

 module_init(p9100_init);

 #ifdef MODULE
 module_exit(p9100_exit);
 #endif

 MODULE_DESCRIPTION("framebuffer driver for P9100 chipsets");
 MODULE_AUTHOR("David S. Miller <davem@redhat.com>");
 MODULE_LICENSE("GPL");
	/* p9100.c: P9100 frame buffer driver
	*
	* Copyright (C) 2003 David S. Miller (davem@redhat.com)
	* 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/slab.h>
	#include <linux/delay.h>
	#include <linux/init.h>
	#include <linux/fb.h>
	#include <linux/mm.h>

	#include <asm/io.h>
	#include <asm/sbus.h>
	#include <asm/oplib.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 file , struct vm_area_struct *);
	static int p9100_ioctl(struct inode , struct file , unsigned int,
	unsigned long, struct fb_info *);

	/*
	* 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,
	};

	/* 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 */
	volatile u32 sys_base;
	volatile u32 sys_config;
	volatile u32 sys_intr;
	volatile u32 sys_int_ena;
	volatile u32 sys_alt_rd;
	volatile u32 sys_alt_wr;
	volatile u32 sys_xxx[58];

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

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

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

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

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

	u32 flags;
	#define P9100_FLAG_BLANKED 0x00000001

	unsigned long physbase;
	unsigned long fbsize;

	struct sbus_dev *sdev;
	struct list_head list;
	};

	/**
	* 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 file file, struct vm_area_struct *vma)
	{
	struct p9100_par par = (struct p9100_par )info->par;

	return sbusfb_mmap_helper(p9100_mmap_map,
	par->physbase, par->fbsize,
	par->sdev->reg_addrs[0].which_io,
	vma);
	}

	static int p9100_ioctl(struct inode inode, struct file file, unsigned int cmd,
	unsigned long arg, struct fb_info *info)
	{
	struct p9100_par par = (struct p9100_par ) info->par;

	/* Make it look like a cg3. */
	return sbusfb_ioctl_helper(cmd, arg, info,
	FBTYPE_SUN3COLOR, 8, par->fbsize);
	}

	/*
	* Initialisation
	*/

	static void
	p9100_init_fix(struct fb_info *info, int linebytes)
	{
	struct p9100_par par = (struct p9100_par )info->par;

	strlcpy(info->fix.id, par->sdev->prom_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;
	}

	struct all_info {
	struct fb_info info;
	struct p9100_par par;
	struct list_head list;
	};
	static LIST_HEAD(p9100_list);

	static void p9100_init_one(struct sbus_dev *sdev)
	{
	struct all_info *all;
	int linebytes;

	all = kmalloc(sizeof(*all), GFP_KERNEL);
	if (!all) {
	printk(KERN_ERR "p9100: Cannot allocate memory.\n");
	return;
	}
	memset(all, 0, sizeof(*all));

	INIT_LIST_HEAD(&all->list);

	spin_lock_init(&all->par.lock);
	all->par.sdev = sdev;

	/* This is the framebuffer and the only resource apps can mmap. */
	all->par.physbase = sdev->reg_addrs[2].phys_addr;

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

	linebytes = prom_getintdefault(sdev->prom_node, "linebytes",
	all->info.var.xres);
	all->par.fbsize = PAGE_ALIGN(linebytes * all->info.var.yres);

	all->par.regs = sbus_ioremap(&sdev->resource[0], 0,
	sizeof(struct p9100_regs), "p9100 regs");

	all->info.flags = FBINFO_DEFAULT;
	all->info.fbops = &p9100_ops;
	#ifdef CONFIG_SPARC32
	all->info.screen_base = (char __iomem *)
	prom_getintdefault(sdev->prom_node, "address", 0);
	#endif
	if (!all->info.screen_base)
	all->info.screen_base = sbus_ioremap(&sdev->resource[2], 0,
	all->par.fbsize, "p9100 ram");
	all->info.par = &all->par;

	p9100_blank(0, &all->info);

	if (fb_alloc_cmap(&all->info.cmap, 256, 0)) {
	printk(KERN_ERR "p9100: Could not allocate color map.\n");
	kfree(all);
	return;
	}

	p9100_init_fix(&all->info, linebytes);

	if (register_framebuffer(&all->info) < 0) {
	printk(KERN_ERR "p9100: Could not register framebuffer.\n");
	fb_dealloc_cmap(&all->info.cmap);
	kfree(all);
	return;
	}
	fb_set_cmap(&all->info.cmap, &all->info);

	list_add(&all->list, &p9100_list);

	printk("p9100: %s at %lx:%lx\n",
	sdev->prom_name,
	(long) sdev->reg_addrs[0].which_io,
	(long) sdev->reg_addrs[0].phys_addr);
	}

	int __init p9100_init(void)
	{
	struct sbus_bus *sbus;
	struct sbus_dev *sdev;

	if (fb_get_options("p9100fb", NULL))
	return -ENODEV;

	for_all_sbusdev(sdev, sbus) {
	if (!strcmp(sdev->prom_name, "p9100"))
	p9100_init_one(sdev);
	}

	return 0;
	}

	void __exit p9100_exit(void)
	{
	struct list_head pos, tmp;

	list_for_each_safe(pos, tmp, &p9100_list) {
	struct all_info all = list_entry(pos, typeof(all), list);

	unregister_framebuffer(&all->info);
	fb_dealloc_cmap(&all->info.cmap);
	kfree(all);
	}
	}

	int __init
	p9100_setup(char *arg)
	{
	/* No cmdline options yet... */
	return 0;
	}

	module_init(p9100_init);

	#ifdef MODULE
	module_exit(p9100_exit);
	#endif

	MODULE_DESCRIPTION("framebuffer driver for P9100 chipsets");
	MODULE_AUTHOR("David S. Miller <davem@redhat.com>");
	MODULE_LICENSE("GPL");