drivers/video/offb.c - kernel/msm-4.19 - Gitiles

 /*
  *  linux/drivers/video/offb.c -- Open Firmware based frame buffer device
  *
  *	Copyright (C) 1997 Geert Uytterhoeven
  *
  *  This driver is partly based on the PowerMac console driver:
  *
  *	Copyright (C) 1996 Paul Mackerras
  *
  *  This file is subject to the terms and conditions of the GNU General Public
  *  License. See the file COPYING in the main directory of this archive for
  *  more details.
  */

 #include <linux/config.h>
 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/errno.h>
 #include <linux/string.h>
 #include <linux/mm.h>
 #include <linux/tty.h>
 #include <linux/slab.h>
 #include <linux/vmalloc.h>
 #include <linux/delay.h>
 #include <linux/interrupt.h>
 #include <linux/fb.h>
 #include <linux/init.h>
 #include <linux/ioport.h>
 #include <asm/io.h>
 #include <asm/prom.h>

 #ifdef CONFIG_PPC64
 #include <asm/pci-bridge.h>
 #endif

 #ifdef CONFIG_PPC32
 #include <asm/bootx.h>
 #endif

 #include "macmodes.h"

 /* Supported palette hacks */
 enum {
 	cmap_unknown,
 	cmap_m64,		/* ATI Mach64 */
 	cmap_r128,		/* ATI Rage128 */
 	cmap_M3A,		/* ATI Rage Mobility M3 Head A */
 	cmap_M3B,		/* ATI Rage Mobility M3 Head B */
 	cmap_radeon,		/* ATI Radeon */
 	cmap_gxt2000,		/* IBM GXT2000 */
 };

 struct offb_par {
 	volatile void __iomem *cmap_adr;
 	volatile void __iomem *cmap_data;
 	int cmap_type;
 	int blanked;
 };

 struct offb_par default_par;

     /*
      *  Interface used by the world
      */

 int offb_init(void);

 static int offb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
 			  u_int transp, struct fb_info *info);
 static int offb_blank(int blank, struct fb_info *info);

 #ifdef CONFIG_PPC32
 extern boot_infos_t *boot_infos;
 #endif

 static void offb_init_nodriver(struct device_node *);
 static void offb_init_fb(const char *name, const char *full_name,
 			 int width, int height, int depth, int pitch,
 			 unsigned long address, struct device_node *dp);

 static struct fb_ops offb_ops = {
 	.owner		= THIS_MODULE,
 	.fb_setcolreg	= offb_setcolreg,
 	.fb_blank	= offb_blank,
 	.fb_fillrect	= cfb_fillrect,
 	.fb_copyarea	= cfb_copyarea,
 	.fb_imageblit	= cfb_imageblit,
 };

     /*
      *  Set a single color register. The values supplied are already
      *  rounded down to the hardware's capabilities (according to the
      *  entries in the var structure). Return != 0 for invalid regno.
      */

 static int offb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
 			  u_int transp, struct fb_info *info)
 {
 	struct offb_par *par = (struct offb_par *) info->par;

 	if (!par->cmap_adr || regno > 255)
 		return 1;

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

 	switch (par->cmap_type) {
 	case cmap_m64:
 		writeb(regno, par->cmap_adr);
 		writeb(red, par->cmap_data);
 		writeb(green, par->cmap_data);
 		writeb(blue, par->cmap_data);
 		break;
 	case cmap_M3A:
 		/* Clear PALETTE_ACCESS_CNTL in DAC_CNTL */
 		out_le32(par->cmap_adr + 0x58,
 			 in_le32(par->cmap_adr + 0x58) & ~0x20);
 	case cmap_r128:
 		/* Set palette index & data */
 		out_8(par->cmap_adr + 0xb0, regno);
 		out_le32(par->cmap_adr + 0xb4,
 			 (red << 16 | green << 8 | blue));
 		break;
 	case cmap_M3B:
 		/* Set PALETTE_ACCESS_CNTL in DAC_CNTL */
 		out_le32(par->cmap_adr + 0x58,
 			 in_le32(par->cmap_adr + 0x58) | 0x20);
 		/* Set palette index & data */
 		out_8(par->cmap_adr + 0xb0, regno);
 		out_le32(par->cmap_adr + 0xb4, (red << 16 | green << 8 | blue));
 		break;
 	case cmap_radeon:
 		/* Set palette index & data (could be smarter) */
 		out_8(par->cmap_adr + 0xb0, regno);
 		out_le32(par->cmap_adr + 0xb4, (red << 16 | green << 8 | blue));
 		break;
 	case cmap_gxt2000:
 		out_le32((unsigned __iomem *) par->cmap_adr + regno,
 			 (red << 16 | green << 8 | blue));
 		break;
 	}

 	if (regno < 16)
 		switch (info->var.bits_per_pixel) {
 		case 16:
 			((u16 *) (info->pseudo_palette))[regno] =
 			    (regno << 10) | (regno << 5) | regno;
 			break;
 		case 32:
 			{
 				int i = (regno << 8) | regno;
 				((u32 *) (info->pseudo_palette))[regno] =
 				    (i << 16) | i;
 				break;
 			}
 		}
 	return 0;
 }

     /*
      *  Blank the display.
      */

 static int offb_blank(int blank, struct fb_info *info)
 {
 	struct offb_par *par = (struct offb_par *) info->par;
 	int i, j;

 	if (!par->cmap_adr)
 		return 0;

 	if (!par->blanked)
 		if (!blank)
 			return 0;

 	par->blanked = blank;

 	if (blank)
 		for (i = 0; i < 256; i++) {
 			switch (par->cmap_type) {
 			case cmap_m64:
 				writeb(i, par->cmap_adr);
 				for (j = 0; j < 3; j++)
 					writeb(0, par->cmap_data);
 				break;
 			case cmap_M3A:
 				/* Clear PALETTE_ACCESS_CNTL in DAC_CNTL */
 				out_le32(par->cmap_adr + 0x58,
 					 in_le32(par->cmap_adr + 0x58) & ~0x20);
 			case cmap_r128:
 				/* Set palette index & data */
 				out_8(par->cmap_adr + 0xb0, i);
 				out_le32(par->cmap_adr + 0xb4, 0);
 				break;
 			case cmap_M3B:
 				/* Set PALETTE_ACCESS_CNTL in DAC_CNTL */
 				out_le32(par->cmap_adr + 0x58,
 					 in_le32(par->cmap_adr + 0x58) | 0x20);
 				/* Set palette index & data */
 				out_8(par->cmap_adr + 0xb0, i);
 				out_le32(par->cmap_adr + 0xb4, 0);
 				break;
 			case cmap_radeon:
 				out_8(par->cmap_adr + 0xb0, i);
 				out_le32(par->cmap_adr + 0xb4, 0);
 				break;
 			case cmap_gxt2000:
 				out_le32((unsigned __iomem *) par->cmap_adr + i,
 					 0);
 				break;
 			}
 	} else
 		fb_set_cmap(&info->cmap, info);
 	return 0;
 }

     /*
      *  Initialisation
      */

 int __init offb_init(void)
 {
 	struct device_node *dp = NULL, *boot_disp = NULL;
 #if defined(CONFIG_BOOTX_TEXT) && defined(CONFIG_PPC32)
 	struct device_node *macos_display = NULL;
 #endif
 	if (fb_get_options("offb", NULL))
 		return -ENODEV;

 #if defined(CONFIG_BOOTX_TEXT) && defined(CONFIG_PPC32)
 	/* If we're booted from BootX... */
 	if (boot_infos != 0) {
 		unsigned long addr =
 		    (unsigned long) boot_infos->dispDeviceBase;
 		/* find the device node corresponding to the macos display */
 		while ((dp = of_find_node_by_type(dp, "display"))) {
 			int i;
 			/*
 			 * Grrr...  It looks like the MacOS ATI driver
 			 * munges the assigned-addresses property (but
 			 * the AAPL,address value is OK).
 			 */
 			if (strncmp(dp->name, "ATY,", 4) == 0
 			    && dp->n_addrs == 1) {
 				unsigned int *ap =
 				    (unsigned int *) get_property(dp,
 								  "AAPL,address",
 								  NULL);
 				if (ap != NULL) {
 					dp->addrs[0].address = *ap;
 					dp->addrs[0].size = 0x01000000;
 				}
 			}

 			/*
 			 * The LTPro on the Lombard powerbook has no addresses
 			 * on the display nodes, they are on their parent.
 			 */
 			if (dp->n_addrs == 0
 			    && device_is_compatible(dp, "ATY,264LTPro")) {
 				int na;
 				unsigned int *ap = (unsigned int *)
 				    get_property(dp, "AAPL,address", &na);
 				if (ap != 0)
 					for (na /= sizeof(unsigned int);
 					     na > 0; --na, ++ap)
 						if (*ap <= addr
 						    && addr <
 						    *ap + 0x1000000)
 							goto foundit;
 			}

 			/*
 			 * See if the display address is in one of the address
 			 * ranges for this display.
 			 */
 			for (i = 0; i < dp->n_addrs; ++i) {
 				if (dp->addrs[i].address <= addr
 				    && addr <
 				    dp->addrs[i].address +
 				    dp->addrs[i].size)
 					break;
 			}
 			if (i < dp->n_addrs) {
 			      foundit:
 				printk(KERN_INFO "MacOS display is %s\n",
 				       dp->full_name);
 				macos_display = dp;
 				break;
 			}
 		}

 		/* initialize it */
 		offb_init_fb(macos_display ? macos_display->
 			     name : "MacOS display",
 			     macos_display ? macos_display->
 			     full_name : "MacOS display",
 			     boot_infos->dispDeviceRect[2],
 			     boot_infos->dispDeviceRect[3],
 			     boot_infos->dispDeviceDepth,
 			     boot_infos->dispDeviceRowBytes, addr, NULL);
 	}
 #endif /* defined(CONFIG_BOOTX_TEXT) && defined(CONFIG_PPC32) */

 	for (dp = NULL; (dp = of_find_node_by_type(dp, "display"));) {
 		if (get_property(dp, "linux,opened", NULL) &&
 		    get_property(dp, "linux,boot-display", NULL)) {
 			boot_disp = dp;
 			offb_init_nodriver(dp);
 		}
 	}
 	for (dp = NULL; (dp = of_find_node_by_type(dp, "display"));) {
 		if (get_property(dp, "linux,opened", NULL) &&
 		    dp != boot_disp)
 			offb_init_nodriver(dp);
 	}

 	return 0;
 }


 static void __init offb_init_nodriver(struct device_node *dp)
 {
 	int *pp, i;
 	unsigned int len;
 	int width = 640, height = 480, depth = 8, pitch;
 	unsigned *up;
 	unsigned long address;

 	if ((pp = (int *) get_property(dp, "depth", &len)) != NULL
 	    && len == sizeof(int))
 		depth = *pp;
 	if ((pp = (int *) get_property(dp, "width", &len)) != NULL
 	    && len == sizeof(int))
 		width = *pp;
 	if ((pp = (int *) get_property(dp, "height", &len)) != NULL
 	    && len == sizeof(int))
 		height = *pp;
 	if ((pp = (int *) get_property(dp, "linebytes", &len)) != NULL
 	    && len == sizeof(int)) {
 		pitch = *pp;
 		if (pitch == 1)
 			pitch = 0x1000;
 	} else
 		pitch = width;
 	if ((up = (unsigned *) get_property(dp, "address", &len)) != NULL
 	    && len == sizeof(unsigned))
 		address = (u_long) * up;
 	else {
 		for (i = 0; i < dp->n_addrs; ++i)
 			if (dp->addrs[i].size >=
 			    pitch * height * depth / 8)
 				break;
 		if (i >= dp->n_addrs) {
 			printk(KERN_ERR
 			       "no framebuffer address found for %s\n",
 			       dp->full_name);
 			return;
 		}

 		address = (u_long) dp->addrs[i].address;

 #ifdef CONFIG_PPC64
 		address += ((struct pci_dn *)dp->data)->phb->pci_mem_offset;
 #endif

 		/* kludge for valkyrie */
 		if (strcmp(dp->name, "valkyrie") == 0)
 			address += 0x1000;
 	}
 	offb_init_fb(dp->name, dp->full_name, width, height, depth,
 		     pitch, address, dp);

 }

 static void __init offb_init_fb(const char *name, const char *full_name,
 				int width, int height, int depth,
 				int pitch, unsigned long address,
 				struct device_node *dp)
 {
 	unsigned long res_size = pitch * height * depth / 8;
 	struct offb_par *par = &default_par;
 	unsigned long res_start = address;
 	struct fb_fix_screeninfo *fix;
 	struct fb_var_screeninfo *var;
 	struct fb_info *info;
 	int size;

 	if (!request_mem_region(res_start, res_size, "offb"))
 		return;

 	printk(KERN_INFO
 	       "Using unsupported %dx%d %s at %lx, depth=%d, pitch=%d\n",
 	       width, height, name, address, depth, pitch);
 	if (depth != 8 && depth != 16 && depth != 32) {
 		printk(KERN_ERR "%s: can't use depth = %d\n", full_name,
 		       depth);
 		release_mem_region(res_start, res_size);
 		return;
 	}

 	size = sizeof(struct fb_info) + sizeof(u32) * 17;

 	info = kmalloc(size, GFP_ATOMIC);

 	if (info == 0) {
 		release_mem_region(res_start, res_size);
 		return;
 	}
 	memset(info, 0, size);

 	fix = &info->fix;
 	var = &info->var;

 	strcpy(fix->id, "OFfb ");
 	strncat(fix->id, name, sizeof(fix->id) - sizeof("OFfb "));
 	fix->id[sizeof(fix->id) - 1] = '\0';

 	var->xres = var->xres_virtual = width;
 	var->yres = var->yres_virtual = height;
 	fix->line_length = pitch;

 	fix->smem_start = address;
 	fix->smem_len = pitch * height;
 	fix->type = FB_TYPE_PACKED_PIXELS;
 	fix->type_aux = 0;

 	par->cmap_type = cmap_unknown;
 	if (depth == 8) {
 		/* XXX kludge for ati */
 		if (dp && !strncmp(name, "ATY,Rage128", 11)) {
 			unsigned long regbase = dp->addrs[2].address;
 			par->cmap_adr = ioremap(regbase, 0x1FFF);
 			par->cmap_type = cmap_r128;
 		} else if (dp && (!strncmp(name, "ATY,RageM3pA", 12)
 				  || !strncmp(name, "ATY,RageM3p12A", 14))) {
 			unsigned long regbase =
 			    dp->parent->addrs[2].address;
 			par->cmap_adr = ioremap(regbase, 0x1FFF);
 			par->cmap_type = cmap_M3A;
 		} else if (dp && !strncmp(name, "ATY,RageM3pB", 12)) {
 			unsigned long regbase =
 			    dp->parent->addrs[2].address;
 			par->cmap_adr = ioremap(regbase, 0x1FFF);
 			par->cmap_type = cmap_M3B;
 		} else if (dp && !strncmp(name, "ATY,Rage6", 9)) {
 			unsigned long regbase = dp->addrs[1].address;
 			par->cmap_adr = ioremap(regbase, 0x1FFF);
 			par->cmap_type = cmap_radeon;
 		} else if (!strncmp(name, "ATY,", 4)) {
 			unsigned long base = address & 0xff000000UL;
 			par->cmap_adr =
 			    ioremap(base + 0x7ff000, 0x1000) + 0xcc0;
 			par->cmap_data = par->cmap_adr + 1;
 			par->cmap_type = cmap_m64;
 		} else if (device_is_compatible(dp, "pci1014,b7")) {
 			unsigned long regbase = dp->addrs[0].address;
 			par->cmap_adr = ioremap(regbase + 0x6000, 0x1000);
 			par->cmap_type = cmap_gxt2000;
 		}
 		fix->visual = par->cmap_adr ? FB_VISUAL_PSEUDOCOLOR
 		    : FB_VISUAL_STATIC_PSEUDOCOLOR;
 	} else
 		fix->visual =	/* par->cmap_adr ? FB_VISUAL_DIRECTCOLOR
 				   : */ FB_VISUAL_TRUECOLOR;

 	var->xoffset = var->yoffset = 0;
 	var->bits_per_pixel = depth;
 	switch (depth) {
 	case 8:
 		var->bits_per_pixel = 8;
 		var->red.offset = 0;
 		var->red.length = 8;
 		var->green.offset = 0;
 		var->green.length = 8;
 		var->blue.offset = 0;
 		var->blue.length = 8;
 		var->transp.offset = 0;
 		var->transp.length = 0;
 		break;
 	case 16:		/* RGB 555 */
 		var->bits_per_pixel = 16;
 		var->red.offset = 10;
 		var->red.length = 5;
 		var->green.offset = 5;
 		var->green.length = 5;
 		var->blue.offset = 0;
 		var->blue.length = 5;
 		var->transp.offset = 0;
 		var->transp.length = 0;
 		break;
 	case 32:		/* RGB 888 */
 		var->bits_per_pixel = 32;
 		var->red.offset = 16;
 		var->red.length = 8;
 		var->green.offset = 8;
 		var->green.length = 8;
 		var->blue.offset = 0;
 		var->blue.length = 8;
 		var->transp.offset = 24;
 		var->transp.length = 8;
 		break;
 	}
 	var->red.msb_right = var->green.msb_right = var->blue.msb_right =
 	    var->transp.msb_right = 0;
 	var->grayscale = 0;
 	var->nonstd = 0;
 	var->activate = 0;
 	var->height = var->width = -1;
 	var->pixclock = 10000;
 	var->left_margin = var->right_margin = 16;
 	var->upper_margin = var->lower_margin = 16;
 	var->hsync_len = var->vsync_len = 8;
 	var->sync = 0;
 	var->vmode = FB_VMODE_NONINTERLACED;

 	info->fbops = &offb_ops;
 	info->screen_base = ioremap(address, fix->smem_len);
 	info->par = par;
 	info->pseudo_palette = (void *) (info + 1);
 	info->flags = FBINFO_DEFAULT;

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

 	if (register_framebuffer(info) < 0) {
 		kfree(info);
 		release_mem_region(res_start, res_size);
 		return;
 	}

 	printk(KERN_INFO "fb%d: Open Firmware frame buffer device on %s\n",
 	       info->node, full_name);
 }

 module_init(offb_init);
 MODULE_LICENSE("GPL");
	/*
	* linux/drivers/video/offb.c -- Open Firmware based frame buffer device
	*
	* Copyright (C) 1997 Geert Uytterhoeven
	*
	* This driver is partly based on the PowerMac console driver:
	*
	* Copyright (C) 1996 Paul Mackerras
	*
	* This file is subject to the terms and conditions of the GNU General Public
	* License. See the file COPYING in the main directory of this archive for
	* more details.
	*/

	#include <linux/config.h>
	#include <linux/module.h>
	#include <linux/kernel.h>
	#include <linux/errno.h>
	#include <linux/string.h>
	#include <linux/mm.h>
	#include <linux/tty.h>
	#include <linux/slab.h>
	#include <linux/vmalloc.h>
	#include <linux/delay.h>
	#include <linux/interrupt.h>
	#include <linux/fb.h>
	#include <linux/init.h>
	#include <linux/ioport.h>
	#include <asm/io.h>
	#include <asm/prom.h>

	#ifdef CONFIG_PPC64
	#include <asm/pci-bridge.h>
	#endif

	#ifdef CONFIG_PPC32
	#include <asm/bootx.h>
	#endif

	#include "macmodes.h"

	/* Supported palette hacks */
	enum {
	cmap_unknown,
	cmap_m64, /* ATI Mach64 */
	cmap_r128, /* ATI Rage128 */
	cmap_M3A, /* ATI Rage Mobility M3 Head A */
	cmap_M3B, /* ATI Rage Mobility M3 Head B */
	cmap_radeon, /* ATI Radeon */
	cmap_gxt2000, /* IBM GXT2000 */
	};

	struct offb_par {
	volatile void __iomem *cmap_adr;
	volatile void __iomem *cmap_data;
	int cmap_type;
	int blanked;
	};

	struct offb_par default_par;

	/*
	* Interface used by the world
	*/

	int offb_init(void);

	static int offb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
	u_int transp, struct fb_info *info);
	static int offb_blank(int blank, struct fb_info *info);

	#ifdef CONFIG_PPC32
	extern boot_infos_t *boot_infos;
	#endif

	static void offb_init_nodriver(struct device_node *);
	static void offb_init_fb(const char name, const char full_name,
	int width, int height, int depth, int pitch,
	unsigned long address, struct device_node *dp);

	static struct fb_ops offb_ops = {
	.owner = THIS_MODULE,
	.fb_setcolreg = offb_setcolreg,
	.fb_blank = offb_blank,
	.fb_fillrect = cfb_fillrect,
	.fb_copyarea = cfb_copyarea,
	.fb_imageblit = cfb_imageblit,
	};

	/*
	* Set a single color register. The values supplied are already
	* rounded down to the hardware's capabilities (according to the
	* entries in the var structure). Return != 0 for invalid regno.
	*/

	static int offb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
	u_int transp, struct fb_info *info)
	{
	struct offb_par par = (struct offb_par ) info->par;

	if (!par->cmap_adr \|\| regno > 255)
	return 1;

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

	switch (par->cmap_type) {
	case cmap_m64:
	writeb(regno, par->cmap_adr);
	writeb(red, par->cmap_data);
	writeb(green, par->cmap_data);
	writeb(blue, par->cmap_data);
	break;
	case cmap_M3A:
	/* Clear PALETTE_ACCESS_CNTL in DAC_CNTL */
	out_le32(par->cmap_adr + 0x58,
	in_le32(par->cmap_adr + 0x58) & ~0x20);
	case cmap_r128:
	/* Set palette index & data */
	out_8(par->cmap_adr + 0xb0, regno);
	out_le32(par->cmap_adr + 0xb4,
	(red << 16 \| green << 8 \| blue));
	break;
	case cmap_M3B:
	/* Set PALETTE_ACCESS_CNTL in DAC_CNTL */
	out_le32(par->cmap_adr + 0x58,
	in_le32(par->cmap_adr + 0x58) \| 0x20);
	/* Set palette index & data */
	out_8(par->cmap_adr + 0xb0, regno);
	out_le32(par->cmap_adr + 0xb4, (red << 16 \| green << 8 \| blue));
	break;
	case cmap_radeon:
	/* Set palette index & data (could be smarter) */
	out_8(par->cmap_adr + 0xb0, regno);
	out_le32(par->cmap_adr + 0xb4, (red << 16 \| green << 8 \| blue));
	break;
	case cmap_gxt2000:
	out_le32((unsigned __iomem *) par->cmap_adr + regno,
	(red << 16 \| green << 8 \| blue));
	break;
	}

	if (regno < 16)
	switch (info->var.bits_per_pixel) {
	case 16:
	((u16 *) (info->pseudo_palette))[regno] =
	(regno << 10) \| (regno << 5) \| regno;
	break;
	case 32:
	{
	int i = (regno << 8) \| regno;
	((u32 *) (info->pseudo_palette))[regno] =
	(i << 16) \| i;
	break;
	}
	}
	return 0;
	}

	/*
	* Blank the display.
	*/

	static int offb_blank(int blank, struct fb_info *info)
	{
	struct offb_par par = (struct offb_par ) info->par;
	int i, j;

	if (!par->cmap_adr)
	return 0;

	if (!par->blanked)
	if (!blank)
	return 0;

	par->blanked = blank;

	if (blank)
	for (i = 0; i < 256; i++) {
	switch (par->cmap_type) {
	case cmap_m64:
	writeb(i, par->cmap_adr);
	for (j = 0; j < 3; j++)
	writeb(0, par->cmap_data);
	break;
	case cmap_M3A:
	/* Clear PALETTE_ACCESS_CNTL in DAC_CNTL */
	out_le32(par->cmap_adr + 0x58,
	in_le32(par->cmap_adr + 0x58) & ~0x20);
	case cmap_r128:
	/* Set palette index & data */
	out_8(par->cmap_adr + 0xb0, i);
	out_le32(par->cmap_adr + 0xb4, 0);
	break;
	case cmap_M3B:
	/* Set PALETTE_ACCESS_CNTL in DAC_CNTL */
	out_le32(par->cmap_adr + 0x58,
	in_le32(par->cmap_adr + 0x58) \| 0x20);
	/* Set palette index & data */
	out_8(par->cmap_adr + 0xb0, i);
	out_le32(par->cmap_adr + 0xb4, 0);
	break;
	case cmap_radeon:
	out_8(par->cmap_adr + 0xb0, i);
	out_le32(par->cmap_adr + 0xb4, 0);
	break;
	case cmap_gxt2000:
	out_le32((unsigned __iomem *) par->cmap_adr + i,
	0);
	break;
	}
	} else
	fb_set_cmap(&info->cmap, info);
	return 0;
	}

	/*
	* Initialisation
	*/

	int __init offb_init(void)
	{
	struct device_node dp = NULL, boot_disp = NULL;
	#if defined(CONFIG_BOOTX_TEXT) && defined(CONFIG_PPC32)
	struct device_node *macos_display = NULL;
	#endif
	if (fb_get_options("offb", NULL))
	return -ENODEV;

	#if defined(CONFIG_BOOTX_TEXT) && defined(CONFIG_PPC32)
	/* If we're booted from BootX... */
	if (boot_infos != 0) {
	unsigned long addr =
	(unsigned long) boot_infos->dispDeviceBase;
	/* find the device node corresponding to the macos display */
	while ((dp = of_find_node_by_type(dp, "display"))) {
	int i;
	/*
	* Grrr... It looks like the MacOS ATI driver
	* munges the assigned-addresses property (but
	* the AAPL,address value is OK).
	*/
	if (strncmp(dp->name, "ATY,", 4) == 0
	&& dp->n_addrs == 1) {
	unsigned int *ap =
	(unsigned int *) get_property(dp,
	"AAPL,address",
	NULL);
	if (ap != NULL) {
	dp->addrs[0].address = *ap;
	dp->addrs[0].size = 0x01000000;
	}
	}

	/*
	* The LTPro on the Lombard powerbook has no addresses
	* on the display nodes, they are on their parent.
	*/
	if (dp->n_addrs == 0
	&& device_is_compatible(dp, "ATY,264LTPro")) {
	int na;
	unsigned int ap = (unsigned int )
	get_property(dp, "AAPL,address", &na);
	if (ap != 0)
	for (na /= sizeof(unsigned int);
	na > 0; --na, ++ap)
	if (*ap <= addr
	&& addr <
	*ap + 0x1000000)
	goto foundit;
	}

	/*
	* See if the display address is in one of the address
	* ranges for this display.
	*/
	for (i = 0; i < dp->n_addrs; ++i) {
	if (dp->addrs[i].address <= addr
	&& addr <
	dp->addrs[i].address +
	dp->addrs[i].size)
	break;
	}
	if (i < dp->n_addrs) {
	foundit:
	printk(KERN_INFO "MacOS display is %s\n",
	dp->full_name);
	macos_display = dp;
	break;
	}
	}

	/* initialize it */
	offb_init_fb(macos_display ? macos_display->
	name : "MacOS display",
	macos_display ? macos_display->
	full_name : "MacOS display",
	boot_infos->dispDeviceRect[2],
	boot_infos->dispDeviceRect[3],
	boot_infos->dispDeviceDepth,
	boot_infos->dispDeviceRowBytes, addr, NULL);
	}
	#endif /* defined(CONFIG_BOOTX_TEXT) && defined(CONFIG_PPC32) */

	for (dp = NULL; (dp = of_find_node_by_type(dp, "display"));) {
	if (get_property(dp, "linux,opened", NULL) &&
	get_property(dp, "linux,boot-display", NULL)) {
	boot_disp = dp;
	offb_init_nodriver(dp);
	}
	}
	for (dp = NULL; (dp = of_find_node_by_type(dp, "display"));) {
	if (get_property(dp, "linux,opened", NULL) &&
	dp != boot_disp)
	offb_init_nodriver(dp);
	}

	return 0;
	}


	static void __init offb_init_nodriver(struct device_node *dp)
	{
	int *pp, i;
	unsigned int len;
	int width = 640, height = 480, depth = 8, pitch;
	unsigned *up;
	unsigned long address;

	if ((pp = (int *) get_property(dp, "depth", &len)) != NULL
	&& len == sizeof(int))
	depth = *pp;
	if ((pp = (int *) get_property(dp, "width", &len)) != NULL
	&& len == sizeof(int))
	width = *pp;
	if ((pp = (int *) get_property(dp, "height", &len)) != NULL
	&& len == sizeof(int))
	height = *pp;
	if ((pp = (int *) get_property(dp, "linebytes", &len)) != NULL
	&& len == sizeof(int)) {
	pitch = *pp;
	if (pitch == 1)
	pitch = 0x1000;
	} else
	pitch = width;
	if ((up = (unsigned *) get_property(dp, "address", &len)) != NULL
	&& len == sizeof(unsigned))
	address = (u_long) * up;
	else {
	for (i = 0; i < dp->n_addrs; ++i)
	if (dp->addrs[i].size >=
	pitch * height * depth / 8)
	break;
	if (i >= dp->n_addrs) {
	printk(KERN_ERR
	"no framebuffer address found for %s\n",
	dp->full_name);
	return;
	}

	address = (u_long) dp->addrs[i].address;

	#ifdef CONFIG_PPC64
	address += ((struct pci_dn *)dp->data)->phb->pci_mem_offset;
	#endif

	/* kludge for valkyrie */
	if (strcmp(dp->name, "valkyrie") == 0)
	address += 0x1000;
	}
	offb_init_fb(dp->name, dp->full_name, width, height, depth,
	pitch, address, dp);

	}

	static void __init offb_init_fb(const char name, const char full_name,
	int width, int height, int depth,
	int pitch, unsigned long address,
	struct device_node *dp)
	{
	unsigned long res_size = pitch * height * depth / 8;
	struct offb_par *par = &default_par;
	unsigned long res_start = address;
	struct fb_fix_screeninfo *fix;
	struct fb_var_screeninfo *var;
	struct fb_info *info;
	int size;

	if (!request_mem_region(res_start, res_size, "offb"))
	return;

	printk(KERN_INFO
	"Using unsupported %dx%d %s at %lx, depth=%d, pitch=%d\n",
	width, height, name, address, depth, pitch);
	if (depth != 8 && depth != 16 && depth != 32) {
	printk(KERN_ERR "%s: can't use depth = %d\n", full_name,
	depth);
	release_mem_region(res_start, res_size);
	return;
	}

	size = sizeof(struct fb_info) + sizeof(u32) * 17;

	info = kmalloc(size, GFP_ATOMIC);

	if (info == 0) {
	release_mem_region(res_start, res_size);
	return;
	}
	memset(info, 0, size);

	fix = &info->fix;
	var = &info->var;

	strcpy(fix->id, "OFfb ");
	strncat(fix->id, name, sizeof(fix->id) - sizeof("OFfb "));
	fix->id[sizeof(fix->id) - 1] = '\0';

	var->xres = var->xres_virtual = width;
	var->yres = var->yres_virtual = height;
	fix->line_length = pitch;

	fix->smem_start = address;
	fix->smem_len = pitch * height;
	fix->type = FB_TYPE_PACKED_PIXELS;
	fix->type_aux = 0;

	par->cmap_type = cmap_unknown;
	if (depth == 8) {
	/* XXX kludge for ati */
	if (dp && !strncmp(name, "ATY,Rage128", 11)) {
	unsigned long regbase = dp->addrs[2].address;
	par->cmap_adr = ioremap(regbase, 0x1FFF);
	par->cmap_type = cmap_r128;
	} else if (dp && (!strncmp(name, "ATY,RageM3pA", 12)
	\|\| !strncmp(name, "ATY,RageM3p12A", 14))) {
	unsigned long regbase =
	dp->parent->addrs[2].address;
	par->cmap_adr = ioremap(regbase, 0x1FFF);
	par->cmap_type = cmap_M3A;
	} else if (dp && !strncmp(name, "ATY,RageM3pB", 12)) {
	unsigned long regbase =
	dp->parent->addrs[2].address;
	par->cmap_adr = ioremap(regbase, 0x1FFF);
	par->cmap_type = cmap_M3B;
	} else if (dp && !strncmp(name, "ATY,Rage6", 9)) {
	unsigned long regbase = dp->addrs[1].address;
	par->cmap_adr = ioremap(regbase, 0x1FFF);
	par->cmap_type = cmap_radeon;
	} else if (!strncmp(name, "ATY,", 4)) {
	unsigned long base = address & 0xff000000UL;
	par->cmap_adr =
	ioremap(base + 0x7ff000, 0x1000) + 0xcc0;
	par->cmap_data = par->cmap_adr + 1;
	par->cmap_type = cmap_m64;
	} else if (device_is_compatible(dp, "pci1014,b7")) {
	unsigned long regbase = dp->addrs[0].address;
	par->cmap_adr = ioremap(regbase + 0x6000, 0x1000);
	par->cmap_type = cmap_gxt2000;
	}
	fix->visual = par->cmap_adr ? FB_VISUAL_PSEUDOCOLOR
	: FB_VISUAL_STATIC_PSEUDOCOLOR;
	} else
	fix->visual = /* par->cmap_adr ? FB_VISUAL_DIRECTCOLOR
	: */ FB_VISUAL_TRUECOLOR;

	var->xoffset = var->yoffset = 0;
	var->bits_per_pixel = depth;
	switch (depth) {
	case 8:
	var->bits_per_pixel = 8;
	var->red.offset = 0;
	var->red.length = 8;
	var->green.offset = 0;
	var->green.length = 8;
	var->blue.offset = 0;
	var->blue.length = 8;
	var->transp.offset = 0;
	var->transp.length = 0;
	break;
	case 16: /* RGB 555 */
	var->bits_per_pixel = 16;
	var->red.offset = 10;
	var->red.length = 5;
	var->green.offset = 5;
	var->green.length = 5;
	var->blue.offset = 0;
	var->blue.length = 5;
	var->transp.offset = 0;
	var->transp.length = 0;
	break;
	case 32: /* RGB 888 */
	var->bits_per_pixel = 32;
	var->red.offset = 16;
	var->red.length = 8;
	var->green.offset = 8;
	var->green.length = 8;
	var->blue.offset = 0;
	var->blue.length = 8;
	var->transp.offset = 24;
	var->transp.length = 8;
	break;
	}
	var->red.msb_right = var->green.msb_right = var->blue.msb_right =
	var->transp.msb_right = 0;
	var->grayscale = 0;
	var->nonstd = 0;
	var->activate = 0;
	var->height = var->width = -1;
	var->pixclock = 10000;
	var->left_margin = var->right_margin = 16;
	var->upper_margin = var->lower_margin = 16;
	var->hsync_len = var->vsync_len = 8;
	var->sync = 0;
	var->vmode = FB_VMODE_NONINTERLACED;

	info->fbops = &offb_ops;
	info->screen_base = ioremap(address, fix->smem_len);
	info->par = par;
	info->pseudo_palette = (void *) (info + 1);
	info->flags = FBINFO_DEFAULT;

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

	if (register_framebuffer(info) < 0) {
	kfree(info);
	release_mem_region(res_start, res_size);
	return;
	}

	printk(KERN_INFO "fb%d: Open Firmware frame buffer device on %s\n",
	info->node, full_name);
	}

	module_init(offb_init);
	MODULE_LICENSE("GPL");