[linux-2.6-block.git] / drivers / video / offb.c

/*
 *  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/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 <linux/pci.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;
	int i, depth;
	u32 *pal = info->pseudo_palette;

	depth = info->var.bits_per_pixel;
	if (depth == 16)
		depth = (info->var.green.length == 5) ? 15 : 16;

	if (regno > 255 ||
	    (depth == 16 && regno > 63) ||
	    (depth == 15 && regno > 31))
		return 1;

	if (regno < 16) {
		switch (depth) {
		case 15:
			pal[regno] = (regno << 10) | (regno << 5) | regno;
			break;
		case 16:
			pal[regno] = (regno << 11) | (regno << 5) | regno;
			break;
		case 24:
			pal[regno] = (regno << 16) | (regno << 8) | regno;
			break;
		case 32:
			i = (regno << 8) | regno;
			pal[regno] = (i << 16) | i;
			break;
		}
	}

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

	if (!par->cmap_adr)
		return 0;

	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;
	}

	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 (fb_get_options("offb", NULL))
		return -ENODEV;

	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)
{
	unsigned int len;
	int i, width = 640, height = 480, depth = 8, pitch = 640;
	unsigned int flags, rsize, addr_prop = 0;
	unsigned long max_size = 0;
	u64 rstart, address = OF_BAD_ADDR;
	u32 *pp, *addrp, *up;
	u64 asize;

	pp = (u32 *)get_property(dp, "linux,bootx-depth", &len);
	if (pp == NULL)
		pp = (u32 *)get_property(dp, "depth", &len);
	if (pp && len == sizeof(u32))
		depth = *pp;

	pp = (u32 *)get_property(dp, "linux,bootx-width", &len);
	if (pp == NULL)
		pp = (u32 *)get_property(dp, "width", &len);
	if (pp && len == sizeof(u32))
		width = *pp;

	pp = (u32 *)get_property(dp, "linux,bootx-height", &len);
	if (pp == NULL)
		pp = (u32 *)get_property(dp, "height", &len);
	if (pp && len == sizeof(u32))
		height = *pp;

	pp = (u32 *)get_property(dp, "linux,bootx-linebytes", &len);
	if (pp == NULL)
		pp = (u32 *)get_property(dp, "linebytes", &len);
	if (pp && len == sizeof(u32))
		pitch = *pp;
	else
		pitch = width * ((depth + 7) / 8);

	rsize = (unsigned long)pitch * (unsigned long)height;

	/* Ok, now we try to figure out the address of the framebuffer.
	 *
	 * Unfortunately, Open Firmware doesn't provide a standard way to do
	 * so. All we can do is a dodgy heuristic that happens to work in
	 * practice. On most machines, the "address" property contains what
	 * we need, though not on Matrox cards found in IBM machines. What I've
	 * found that appears to give good results is to go through the PCI
	 * ranges and pick one that is both big enough and if possible encloses
	 * the "address" property. If none match, we pick the biggest
	 */
	up = (u32 *)get_property(dp, "linux,bootx-addr", &len);
	if (up == NULL)
		up = (u32 *)get_property(dp, "address", &len);
	if (up && len == sizeof(u32))
		addr_prop = *up;

	for (i = 0; (addrp = of_get_address(dp, i, &asize, &flags))
		     != NULL; i++) {
		int match_addrp = 0;

		if (!(flags & IORESOURCE_MEM))
			continue;
		if (asize < rsize)
			continue;
		rstart = of_translate_address(dp, addrp);
		if (rstart == OF_BAD_ADDR)
			continue;
		if (addr_prop && (rstart <= addr_prop) &&
		    ((rstart + asize) >= (addr_prop + rsize)))
			match_addrp = 1;
		if (match_addrp) {
			address = addr_prop;
			break;
		}
		if (rsize > max_size) {
			max_size = rsize;
			address = OF_BAD_ADDR;
 		}

		if (address == OF_BAD_ADDR)
			address = rstart;
	}
	if (address == OF_BAD_ADDR && addr_prop)
		address = (u64)addr_prop;
	if (address != OF_BAD_ADDR) {
		/* 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 + 7) / 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 != 15 && 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) {

		/* Palette hacks disabled for now */
#if 0
		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;
		}
#endif
		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;
	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 15:		/* 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 16:		/* RGB 565 */
		var->bits_per_pixel = 16;
		var->red.offset = 11;
		var->red.length = 5;
		var->green.offset = 5;
		var->green.length = 6;
		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");
Commit	Line	Data
1da177e4 LT	1	/*
	2	* linux/drivers/video/offb.c -- Open Firmware based frame buffer device
	3	*
	4	* Copyright (C) 1997 Geert Uytterhoeven
	5	*
	6	* This driver is partly based on the PowerMac console driver:
	7	*
	8	* Copyright (C) 1996 Paul Mackerras
	9	*
	10	* This file is subject to the terms and conditions of the GNU General Public
	11	* License. See the file COPYING in the main directory of this archive for
	12	* more details.
	13	*/
	14
1da177e4 LT	15	#include <linux/module.h>
	16	#include <linux/kernel.h>
	17	#include <linux/errno.h>
	18	#include <linux/string.h>
	19	#include <linux/mm.h>
	20	#include <linux/tty.h>
	21	#include <linux/slab.h>
	22	#include <linux/vmalloc.h>
	23	#include <linux/delay.h>
	24	#include <linux/interrupt.h>
	25	#include <linux/fb.h>
	26	#include <linux/init.h>
	27	#include <linux/ioport.h>
f365cfd0	28	#include <linux/pci.h>
1da177e4 LT	29	#include <asm/io.h>
	30	#include <asm/prom.h>
	31
	32	#ifdef CONFIG_PPC64
	33	#include <asm/pci-bridge.h>
	34	#endif
	35
	36	#ifdef CONFIG_PPC32
	37	#include <asm/bootx.h>
	38	#endif
	39
	40	#include "macmodes.h"
	41
	42	/* Supported palette hacks */
	43	enum {
	44	cmap_unknown,
	45	cmap_m64, /* ATI Mach64 */
	46	cmap_r128, /* ATI Rage128 */
	47	cmap_M3A, /* ATI Rage Mobility M3 Head A */
	48	cmap_M3B, /* ATI Rage Mobility M3 Head B */
	49	cmap_radeon, /* ATI Radeon */
	50	cmap_gxt2000, /* IBM GXT2000 */
	51	};
	52
	53	struct offb_par {
	54	volatile void __iomem *cmap_adr;
	55	volatile void __iomem *cmap_data;
	56	int cmap_type;
	57	int blanked;
	58	};
	59
	60	struct offb_par default_par;
	61
	62	/*
	63	* Interface used by the world
	64	*/
	65
	66	int offb_init(void);
	67
	68	static int offb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
	69	u_int transp, struct fb_info *info);
	70	static int offb_blank(int blank, struct fb_info *info);
	71
	72	#ifdef CONFIG_PPC32
	73	extern boot_infos_t *boot_infos;
	74	#endif
	75
	76	static void offb_init_nodriver(struct device_node *);
	77	static void offb_init_fb(const char name, const char full_name,
	78	int width, int height, int depth, int pitch,
	79	unsigned long address, struct device_node *dp);
	80
	81	static struct fb_ops offb_ops = {
	82	.owner = THIS_MODULE,
	83	.fb_setcolreg = offb_setcolreg,
	84	.fb_blank = offb_blank,
	85	.fb_fillrect = cfb_fillrect,
	86	.fb_copyarea = cfb_copyarea,
	87	.fb_imageblit = cfb_imageblit,
1da177e4 LT	88	};
	89
	90	/*
	91	* Set a single color register. The values supplied are already
	92	* rounded down to the hardware's capabilities (according to the
	93	* entries in the var structure). Return != 0 for invalid regno.
	94	*/
	95
	96	static int offb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
	97	u_int transp, struct fb_info *info)
	98	{
	99	struct offb_par par = (struct offb_par ) info->par;
ab134466 BH	100	int i, depth;
ab134466 BH	101	u32 *pal = info->pseudo_palette;
1da177e4	102
ab134466 BH	103	depth = info->var.bits_per_pixel;
	104	if (depth == 16)
	105	depth = (info->var.green.length == 5) ? 15 : 16;
	106
	107	if (regno > 255 \|\|
	108	(depth == 16 && regno > 63) \|\|
	109	(depth == 15 && regno > 31))
1da177e4 LT	110	return 1;
1da177e4 LT	111
ab134466 BH	112	if (regno < 16) {
	113	switch (depth) {
	114	case 15:
	115	pal[regno] = (regno << 10) \| (regno << 5) \| regno;
	116	break;
	117	case 16:
	118	pal[regno] = (regno << 11) \| (regno << 5) \| regno;
	119	break;
	120	case 24:
	121	pal[regno] = (regno << 16) \| (regno << 8) \| regno;
	122	break;
	123	case 32:
	124	i = (regno << 8) \| regno;
	125	pal[regno] = (i << 16) \| i;
	126	break;
	127	}
	128	}
	129
1da177e4 LT	130	red >>= 8;
	131	green >>= 8;
	132	blue >>= 8;
	133
ab134466 BH	134	if (!par->cmap_adr)
	135	return 0;
	136
1da177e4 LT	137	switch (par->cmap_type) {
	138	case cmap_m64:
	139	writeb(regno, par->cmap_adr);
	140	writeb(red, par->cmap_data);
	141	writeb(green, par->cmap_data);
	142	writeb(blue, par->cmap_data);
	143	break;
	144	case cmap_M3A:
	145	/* Clear PALETTE_ACCESS_CNTL in DAC_CNTL */
	146	out_le32(par->cmap_adr + 0x58,
	147	in_le32(par->cmap_adr + 0x58) & ~0x20);
	148	case cmap_r128:
	149	/* Set palette index & data */
	150	out_8(par->cmap_adr + 0xb0, regno);
	151	out_le32(par->cmap_adr + 0xb4,
	152	(red << 16 \| green << 8 \| blue));
	153	break;
	154	case cmap_M3B:
	155	/* Set PALETTE_ACCESS_CNTL in DAC_CNTL */
	156	out_le32(par->cmap_adr + 0x58,
	157	in_le32(par->cmap_adr + 0x58) \| 0x20);
	158	/* Set palette index & data */
	159	out_8(par->cmap_adr + 0xb0, regno);
	160	out_le32(par->cmap_adr + 0xb4, (red << 16 \| green << 8 \| blue));
	161	break;
	162	case cmap_radeon:
	163	/* Set palette index & data (could be smarter) */
	164	out_8(par->cmap_adr + 0xb0, regno);
	165	out_le32(par->cmap_adr + 0xb4, (red << 16 \| green << 8 \| blue));
	166	break;
	167	case cmap_gxt2000:
	168	out_le32((unsigned __iomem *) par->cmap_adr + regno,
	169	(red << 16 \| green << 8 \| blue));
	170	break;
	171	}
	172
1da177e4 LT	173	return 0;
	174	}
	175
	176	/*
	177	* Blank the display.
	178	*/
	179
	180	static int offb_blank(int blank, struct fb_info *info)
	181	{
	182	struct offb_par par = (struct offb_par ) info->par;
	183	int i, j;
	184
	185	if (!par->cmap_adr)
	186	return 0;
	187
	188	if (!par->blanked)
	189	if (!blank)
	190	return 0;
	191
	192	par->blanked = blank;
	193
	194	if (blank)
	195	for (i = 0; i < 256; i++) {
	196	switch (par->cmap_type) {
	197	case cmap_m64:
	198	writeb(i, par->cmap_adr);
	199	for (j = 0; j < 3; j++)
	200	writeb(0, par->cmap_data);
	201	break;
	202	case cmap_M3A:
	203	/* Clear PALETTE_ACCESS_CNTL in DAC_CNTL */
	204	out_le32(par->cmap_adr + 0x58,
	205	in_le32(par->cmap_adr + 0x58) & ~0x20);
	206	case cmap_r128:
	207	/* Set palette index & data */
	208	out_8(par->cmap_adr + 0xb0, i);
	209	out_le32(par->cmap_adr + 0xb4, 0);
	210	break;
	211	case cmap_M3B:
	212	/* Set PALETTE_ACCESS_CNTL in DAC_CNTL */
	213	out_le32(par->cmap_adr + 0x58,
	214	in_le32(par->cmap_adr + 0x58) \| 0x20);
	215	/* Set palette index & data */
	216	out_8(par->cmap_adr + 0xb0, i);
	217	out_le32(par->cmap_adr + 0xb4, 0);
	218	break;
	219	case cmap_radeon:
	220	out_8(par->cmap_adr + 0xb0, i);
	221	out_le32(par->cmap_adr + 0xb4, 0);
	222	break;
	223	case cmap_gxt2000:
	224	out_le32((unsigned __iomem *) par->cmap_adr + i,
	225	0);
	226	break;
	227	}
	228	} else
	229	fb_set_cmap(&info->cmap, info);
	230	return 0;
	231	}
	232
	233	/*
	234	* Initialisation
	235	*/
	236
237	int __init offb_init(void)
238	{
239	struct device_node dp = NULL, boot_disp = NULL;
cc5d0189	240
1da177e4 LT	241	if (fb_get_options("offb", NULL))
	242	return -ENODEV;
	243
1da177e4 LT	244	for (dp = NULL; (dp = of_find_node_by_type(dp, "display"));) {
	245	if (get_property(dp, "linux,opened", NULL) &&
	246	get_property(dp, "linux,boot-display", NULL)) {
	247	boot_disp = dp;
	248	offb_init_nodriver(dp);
	249	}
	250	}
	251	for (dp = NULL; (dp = of_find_node_by_type(dp, "display"));) {
	252	if (get_property(dp, "linux,opened", NULL) &&
	253	dp != boot_disp)
	254	offb_init_nodriver(dp);
	255	}
	256
	257	return 0;
	258	}
	259
	260
	261	static void __init offb_init_nodriver(struct device_node *dp)
	262	{
1da177e4	263	unsigned int len;
ab134466 BH	264	int i, width = 640, height = 480, depth = 8, pitch = 640;
	265	unsigned int flags, rsize, addr_prop = 0;
	266	unsigned long max_size = 0;
	267	u64 rstart, address = OF_BAD_ADDR;
	268	u32 pp, addrp, *up;
cc5d0189	269	u64 asize;
1da177e4	270
ab134466 BH	271	pp = (u32 *)get_property(dp, "linux,bootx-depth", &len);
	272	if (pp == NULL)
	273	pp = (u32 *)get_property(dp, "depth", &len);
	274	if (pp && len == sizeof(u32))
1da177e4	275	depth = *pp;
ab134466 BH	276
	277	pp = (u32 *)get_property(dp, "linux,bootx-width", &len);
	278	if (pp == NULL)
	279	pp = (u32 *)get_property(dp, "width", &len);
	280	if (pp && len == sizeof(u32))
1da177e4	281	width = *pp;
ab134466 BH	282
	283	pp = (u32 *)get_property(dp, "linux,bootx-height", &len);
	284	if (pp == NULL)
	285	pp = (u32 *)get_property(dp, "height", &len);
	286	if (pp && len == sizeof(u32))
1da177e4	287	height = *pp;
ab134466 BH	288
	289	pp = (u32 *)get_property(dp, "linux,bootx-linebytes", &len);
	290	if (pp == NULL)
	291	pp = (u32 *)get_property(dp, "linebytes", &len);
	292	if (pp && len == sizeof(u32))
1da177e4	293	pitch = *pp;
ab134466 BH	294	else
	295	pitch = width * ((depth + 7) / 8);
	296
	297	rsize = (unsigned long)pitch * (unsigned long)height;
	298
	299	/* Ok, now we try to figure out the address of the framebuffer.
	300	*
	301	* Unfortunately, Open Firmware doesn't provide a standard way to do
	302	* so. All we can do is a dodgy heuristic that happens to work in
	303	* practice. On most machines, the "address" property contains what
	304	* we need, though not on Matrox cards found in IBM machines. What I've
	305	* found that appears to give good results is to go through the PCI
	306	* ranges and pick one that is both big enough and if possible encloses
	307	* the "address" property. If none match, we pick the biggest
	308	*/
	309	up = (u32 *)get_property(dp, "linux,bootx-addr", &len);
	310	if (up == NULL)
	311	up = (u32 *)get_property(dp, "address", &len);
	312	if (up && len == sizeof(u32))
	313	addr_prop = *up;
	314
	315	for (i = 0; (addrp = of_get_address(dp, i, &asize, &flags))
	316	!= NULL; i++) {
	317	int match_addrp = 0;
	318
	319	if (!(flags & IORESOURCE_MEM))
	320	continue;
	321	if (asize < rsize)
	322	continue;
	323	rstart = of_translate_address(dp, addrp);
	324	if (rstart == OF_BAD_ADDR)
	325	continue;
	326	if (addr_prop && (rstart <= addr_prop) &&
	327	((rstart + asize) >= (addr_prop + rsize)))
	328	match_addrp = 1;
	329	if (match_addrp) {
	330	address = addr_prop;
	331	break;
cc5d0189	332	}
ab134466 BH	333	if (rsize > max_size) {
	334	max_size = rsize;
	335	address = OF_BAD_ADDR;
	336	}
1da177e4	337
ab134466 BH	338	if (address == OF_BAD_ADDR)
	339	address = rstart;
	340	}
	341	if (address == OF_BAD_ADDR && addr_prop)
	342	address = (u64)addr_prop;
	343	if (address != OF_BAD_ADDR) {
1da177e4 LT	344	/* kludge for valkyrie */
	345	if (strcmp(dp->name, "valkyrie") == 0)
	346	address += 0x1000;
ab134466 BH	347	offb_init_fb(dp->name, dp->full_name, width, height, depth,
ab134466 BH	348	pitch, address, dp);
1da177e4	349	}
1da177e4 LT	350	}
	351
	352	static void __init offb_init_fb(const char name, const char full_name,
	353	int width, int height, int depth,
	354	int pitch, unsigned long address,
	355	struct device_node *dp)
	356	{
ab134466	357	unsigned long res_size = pitch * height * (depth + 7) / 8;
1da177e4 LT	358	struct offb_par *par = &default_par;
	359	unsigned long res_start = address;
	360	struct fb_fix_screeninfo *fix;
	361	struct fb_var_screeninfo *var;
	362	struct fb_info *info;
	363	int size;
	364
	365	if (!request_mem_region(res_start, res_size, "offb"))
	366	return;
	367
	368	printk(KERN_INFO
	369	"Using unsupported %dx%d %s at %lx, depth=%d, pitch=%d\n",
	370	width, height, name, address, depth, pitch);
ab134466	371	if (depth != 8 && depth != 15 && depth != 16 && depth != 32) {
1da177e4 LT	372	printk(KERN_ERR "%s: can't use depth = %d\n", full_name,
	373	depth);
	374	release_mem_region(res_start, res_size);
	375	return;
	376	}
	377
	378	size = sizeof(struct fb_info) + sizeof(u32) * 17;
	379
	380	info = kmalloc(size, GFP_ATOMIC);
	381
	382	if (info == 0) {
	383	release_mem_region(res_start, res_size);
	384	return;
	385	}
	386	memset(info, 0, size);
	387
	388	fix = &info->fix;
	389	var = &info->var;
	390
	391	strcpy(fix->id, "OFfb ");
	392	strncat(fix->id, name, sizeof(fix->id) - sizeof("OFfb "));
	393	fix->id[sizeof(fix->id) - 1] = '\0';
	394
	395	var->xres = var->xres_virtual = width;
	396	var->yres = var->yres_virtual = height;
	397	fix->line_length = pitch;
	398
	399	fix->smem_start = address;
	400	fix->smem_len = pitch * height;
	401	fix->type = FB_TYPE_PACKED_PIXELS;
	402	fix->type_aux = 0;
	403
	404	par->cmap_type = cmap_unknown;
	405	if (depth == 8) {
cc5d0189 BH	406
	407	/* Palette hacks disabled for now */
	408	#if 0
1da177e4 LT	409	if (dp && !strncmp(name, "ATY,Rage128", 11)) {
	410	unsigned long regbase = dp->addrs[2].address;
	411	par->cmap_adr = ioremap(regbase, 0x1FFF);
	412	par->cmap_type = cmap_r128;
	413	} else if (dp && (!strncmp(name, "ATY,RageM3pA", 12)
	414	\|\| !strncmp(name, "ATY,RageM3p12A", 14))) {
	415	unsigned long regbase =
	416	dp->parent->addrs[2].address;
	417	par->cmap_adr = ioremap(regbase, 0x1FFF);
	418	par->cmap_type = cmap_M3A;
	419	} else if (dp && !strncmp(name, "ATY,RageM3pB", 12)) {
	420	unsigned long regbase =
	421	dp->parent->addrs[2].address;
	422	par->cmap_adr = ioremap(regbase, 0x1FFF);
	423	par->cmap_type = cmap_M3B;
	424	} else if (dp && !strncmp(name, "ATY,Rage6", 9)) {
	425	unsigned long regbase = dp->addrs[1].address;
	426	par->cmap_adr = ioremap(regbase, 0x1FFF);
	427	par->cmap_type = cmap_radeon;
	428	} else if (!strncmp(name, "ATY,", 4)) {
	429	unsigned long base = address & 0xff000000UL;
	430	par->cmap_adr =
	431	ioremap(base + 0x7ff000, 0x1000) + 0xcc0;
	432	par->cmap_data = par->cmap_adr + 1;
	433	par->cmap_type = cmap_m64;
	434	} else if (device_is_compatible(dp, "pci1014,b7")) {
	435	unsigned long regbase = dp->addrs[0].address;
	436	par->cmap_adr = ioremap(regbase + 0x6000, 0x1000);
	437	par->cmap_type = cmap_gxt2000;
	438	}
cc5d0189	439	#endif
1da177e4 LT	440	fix->visual = par->cmap_adr ? FB_VISUAL_PSEUDOCOLOR
	441	: FB_VISUAL_STATIC_PSEUDOCOLOR;
	442	} else
	443	fix->visual = /* par->cmap_adr ? FB_VISUAL_DIRECTCOLOR
	444	: */ FB_VISUAL_TRUECOLOR;
	445
	446	var->xoffset = var->yoffset = 0;
1da177e4 LT	447	switch (depth) {
	448	case 8:
	449	var->bits_per_pixel = 8;
	450	var->red.offset = 0;
	451	var->red.length = 8;
	452	var->green.offset = 0;
	453	var->green.length = 8;
	454	var->blue.offset = 0;
	455	var->blue.length = 8;
	456	var->transp.offset = 0;
	457	var->transp.length = 0;
	458	break;
ab134466	459	case 15: /* RGB 555 */
1da177e4 LT	460	var->bits_per_pixel = 16;
	461	var->red.offset = 10;
	462	var->red.length = 5;
	463	var->green.offset = 5;
	464	var->green.length = 5;
	465	var->blue.offset = 0;
	466	var->blue.length = 5;
	467	var->transp.offset = 0;
	468	var->transp.length = 0;
	469	break;
ab134466 BH	470	case 16: /* RGB 565 */
	471	var->bits_per_pixel = 16;
	472	var->red.offset = 11;
	473	var->red.length = 5;
	474	var->green.offset = 5;
	475	var->green.length = 6;
	476	var->blue.offset = 0;
	477	var->blue.length = 5;
	478	var->transp.offset = 0;
	479	var->transp.length = 0;
	480	break;
1da177e4 LT	481	case 32: /* RGB 888 */
	482	var->bits_per_pixel = 32;
	483	var->red.offset = 16;
	484	var->red.length = 8;
	485	var->green.offset = 8;
	486	var->green.length = 8;
	487	var->blue.offset = 0;
	488	var->blue.length = 8;
	489	var->transp.offset = 24;
	490	var->transp.length = 8;
	491	break;
	492	}
	493	var->red.msb_right = var->green.msb_right = var->blue.msb_right =
	494	var->transp.msb_right = 0;
	495	var->grayscale = 0;
	496	var->nonstd = 0;
	497	var->activate = 0;
	498	var->height = var->width = -1;
	499	var->pixclock = 10000;
	500	var->left_margin = var->right_margin = 16;
	501	var->upper_margin = var->lower_margin = 16;
	502	var->hsync_len = var->vsync_len = 8;
	503	var->sync = 0;
	504	var->vmode = FB_VMODE_NONINTERLACED;
	505
	506	info->fbops = &offb_ops;
	507	info->screen_base = ioremap(address, fix->smem_len);
	508	info->par = par;
	509	info->pseudo_palette = (void *) (info + 1);
	510	info->flags = FBINFO_DEFAULT;
	511
	512	fb_alloc_cmap(&info->cmap, 256, 0);
	513
	514	if (register_framebuffer(info) < 0) {
	515	kfree(info);
	516	release_mem_region(res_start, res_size);
	517	return;
	518	}
	519
	520	printk(KERN_INFO "fb%d: Open Firmware frame buffer device on %s\n",
	521	info->node, full_name);
	522	}
	523
	524	module_init(offb_init);
	525	MODULE_LICENSE("GPL");