[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
     */

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 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;
}


static void __iomem *offb_map_reg(struct device_node *np, int index,
				  unsigned long offset, unsigned long size)
{
	struct resource r;

	if (of_address_to_resource(np, index, &r))
		return 0;
	if ((r.start + offset + size) > r.end)
		return 0;
	return ioremap(r.start + offset, size);
}

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 (dp && !strncmp(name, "ATY,Rage128", 11)) {
			par->cmap_adr = offb_map_reg(dp, 2, 0, 0x1fff);
			if (par->cmap_adr)
				par->cmap_type = cmap_r128;
		} else if (dp && (!strncmp(name, "ATY,RageM3pA", 12)
				  || !strncmp(name, "ATY,RageM3p12A", 14))) {
			par->cmap_adr = offb_map_reg(dp, 2, 0, 0x1fff);
			if (par->cmap_adr)
				par->cmap_type = cmap_M3A;
		} else if (dp && !strncmp(name, "ATY,RageM3pB", 12)) {
			par->cmap_adr = offb_map_reg(dp, 2, 0, 0x1fff);
			if (par->cmap_adr)
				par->cmap_type = cmap_M3B;
		} else if (dp && !strncmp(name, "ATY,Rage6", 9)) {
			par->cmap_adr = offb_map_reg(dp, 1, 0, 0x1fff);
			if (par->cmap_adr)
				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 (dp && device_is_compatible(dp, "pci1014,b7")) {
			par->cmap_adr = offb_map_reg(dp, 0, 0x6000, 0x1000);
			if (par->cmap_adr)
				par->cmap_type = cmap_gxt2000;
		}
		fix->visual = (par->cmap_type != cmap_unknown) ?
			FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_STATIC_PSEUDOCOLOR;
	} else
		fix->visual = 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);
}


static void __init offb_init_nodriver(struct device_node *dp, int no_real_node)
{
	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;

	/* Hack for when BootX is passing us */
	if (no_real_node)
		goto skip_addr;

	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;
	}
 skip_addr:
	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(no_real_node ? "bootx" : dp->name,
			     no_real_node ? "display" : dp->full_name,
			     width, height, depth, pitch, address,
			     no_real_node ? dp : NULL);
	}
}

static int __init offb_init(void)
{
	struct device_node *dp = NULL, *boot_disp = NULL;

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

	/* Check if we have a MacOS display without a node spec */
	if (get_property(of_chosen, "linux,bootx-noscreen", NULL) != NULL) {
		/* The old code tried to work out which node was the MacOS
		 * display based on the address. I'm dropping that since the
		 * lack of a node spec only happens with old BootX versions
		 * (users can update) and with this code, they'll still get
		 * a display (just not the palette hacks).
		 */
		offb_init_nodriver(of_chosen, 1);
	}

	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, 0);
		}
	}
	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, 0);
	}

	return 0;
}


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
1da177e4 LT	66	static int offb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
	67	u_int transp, struct fb_info *info);
	68	static int offb_blank(int blank, struct fb_info *info);
	69
	70	#ifdef CONFIG_PPC32
	71	extern boot_infos_t *boot_infos;
	72	#endif
	73
1da177e4 LT	74	static struct fb_ops offb_ops = {
	75	.owner = THIS_MODULE,
	76	.fb_setcolreg = offb_setcolreg,
	77	.fb_blank = offb_blank,
	78	.fb_fillrect = cfb_fillrect,
	79	.fb_copyarea = cfb_copyarea,
	80	.fb_imageblit = cfb_imageblit,
1da177e4 LT	81	};
	82
	83	/*
	84	* Set a single color register. The values supplied are already
	85	* rounded down to the hardware's capabilities (according to the
	86	* entries in the var structure). Return != 0 for invalid regno.
	87	*/
	88
	89	static int offb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
	90	u_int transp, struct fb_info *info)
	91	{
	92	struct offb_par par = (struct offb_par ) info->par;
ab134466 BH	93	int i, depth;
ab134466 BH	94	u32 *pal = info->pseudo_palette;
1da177e4	95
ab134466 BH	96	depth = info->var.bits_per_pixel;
	97	if (depth == 16)
	98	depth = (info->var.green.length == 5) ? 15 : 16;
	99
	100	if (regno > 255 \|\|
	101	(depth == 16 && regno > 63) \|\|
	102	(depth == 15 && regno > 31))
1da177e4 LT	103	return 1;
1da177e4 LT	104
ab134466 BH	105	if (regno < 16) {
	106	switch (depth) {
	107	case 15:
	108	pal[regno] = (regno << 10) \| (regno << 5) \| regno;
	109	break;
	110	case 16:
	111	pal[regno] = (regno << 11) \| (regno << 5) \| regno;
	112	break;
	113	case 24:
	114	pal[regno] = (regno << 16) \| (regno << 8) \| regno;
	115	break;
	116	case 32:
	117	i = (regno << 8) \| regno;
	118	pal[regno] = (i << 16) \| i;
	119	break;
	120	}
	121	}
	122
1da177e4 LT	123	red >>= 8;
	124	green >>= 8;
	125	blue >>= 8;
	126
ab134466 BH	127	if (!par->cmap_adr)
	128	return 0;
	129
1da177e4 LT	130	switch (par->cmap_type) {
	131	case cmap_m64:
	132	writeb(regno, par->cmap_adr);
	133	writeb(red, par->cmap_data);
	134	writeb(green, par->cmap_data);
	135	writeb(blue, par->cmap_data);
	136	break;
	137	case cmap_M3A:
	138	/* Clear PALETTE_ACCESS_CNTL in DAC_CNTL */
	139	out_le32(par->cmap_adr + 0x58,
	140	in_le32(par->cmap_adr + 0x58) & ~0x20);
	141	case cmap_r128:
	142	/* Set palette index & data */
	143	out_8(par->cmap_adr + 0xb0, regno);
	144	out_le32(par->cmap_adr + 0xb4,
	145	(red << 16 \| green << 8 \| blue));
	146	break;
	147	case cmap_M3B:
	148	/* Set PALETTE_ACCESS_CNTL in DAC_CNTL */
	149	out_le32(par->cmap_adr + 0x58,
	150	in_le32(par->cmap_adr + 0x58) \| 0x20);
	151	/* Set palette index & data */
	152	out_8(par->cmap_adr + 0xb0, regno);
	153	out_le32(par->cmap_adr + 0xb4, (red << 16 \| green << 8 \| blue));
	154	break;
	155	case cmap_radeon:
	156	/* Set palette index & data (could be smarter) */
	157	out_8(par->cmap_adr + 0xb0, regno);
	158	out_le32(par->cmap_adr + 0xb4, (red << 16 \| green << 8 \| blue));
	159	break;
	160	case cmap_gxt2000:
	161	out_le32((unsigned __iomem *) par->cmap_adr + regno,
	162	(red << 16 \| green << 8 \| blue));
	163	break;
	164	}
	165
1da177e4 LT	166	return 0;
	167	}
	168
	169	/*
	170	* Blank the display.
	171	*/
	172
	173	static int offb_blank(int blank, struct fb_info *info)
	174	{
	175	struct offb_par par = (struct offb_par ) info->par;
	176	int i, j;
	177
	178	if (!par->cmap_adr)
	179	return 0;
	180
	181	if (!par->blanked)
	182	if (!blank)
	183	return 0;
	184
	185	par->blanked = blank;
	186
	187	if (blank)
	188	for (i = 0; i < 256; i++) {
	189	switch (par->cmap_type) {
	190	case cmap_m64:
	191	writeb(i, par->cmap_adr);
	192	for (j = 0; j < 3; j++)
	193	writeb(0, par->cmap_data);
	194	break;
	195	case cmap_M3A:
	196	/* Clear PALETTE_ACCESS_CNTL in DAC_CNTL */
	197	out_le32(par->cmap_adr + 0x58,
	198	in_le32(par->cmap_adr + 0x58) & ~0x20);
	199	case cmap_r128:
	200	/* Set palette index & data */
	201	out_8(par->cmap_adr + 0xb0, i);
	202	out_le32(par->cmap_adr + 0xb4, 0);
	203	break;
	204	case cmap_M3B:
	205	/* Set PALETTE_ACCESS_CNTL in DAC_CNTL */
	206	out_le32(par->cmap_adr + 0x58,
	207	in_le32(par->cmap_adr + 0x58) \| 0x20);
	208	/* Set palette index & data */
	209	out_8(par->cmap_adr + 0xb0, i);
	210	out_le32(par->cmap_adr + 0xb4, 0);
	211	break;
	212	case cmap_radeon:
	213	out_8(par->cmap_adr + 0xb0, i);
	214	out_le32(par->cmap_adr + 0xb4, 0);
	215	break;
	216	case cmap_gxt2000:
	217	out_le32((unsigned __iomem *) par->cmap_adr + i,
	218	0);
	219	break;
	220	}
	221	} else
	222	fb_set_cmap(&info->cmap, info);
	223	return 0;
	224	}
	225
1da177e4	226
73ea6959 BH	227	static void __iomem offb_map_reg(struct device_node np, int index,
73ea6959 BH	228	unsigned long offset, unsigned long size)
1da177e4	229	{
73ea6959	230	struct resource r;
1da177e4	231
73ea6959 BH	232	if (of_address_to_resource(np, index, &r))
	233	return 0;
	234	if ((r.start + offset + size) > r.end)
	235	return 0;
	236	return ioremap(r.start + offset, size);
1da177e4 LT	237	}
	238
	239	static void __init offb_init_fb(const char name, const char full_name,
	240	int width, int height, int depth,
	241	int pitch, unsigned long address,
	242	struct device_node *dp)
	243	{
ab134466	244	unsigned long res_size = pitch * height * (depth + 7) / 8;
1da177e4 LT	245	struct offb_par *par = &default_par;
	246	unsigned long res_start = address;
	247	struct fb_fix_screeninfo *fix;
	248	struct fb_var_screeninfo *var;
	249	struct fb_info *info;
	250	int size;
	251
	252	if (!request_mem_region(res_start, res_size, "offb"))
	253	return;
	254
	255	printk(KERN_INFO
	256	"Using unsupported %dx%d %s at %lx, depth=%d, pitch=%d\n",
	257	width, height, name, address, depth, pitch);
ab134466	258	if (depth != 8 && depth != 15 && depth != 16 && depth != 32) {
1da177e4 LT	259	printk(KERN_ERR "%s: can't use depth = %d\n", full_name,
	260	depth);
	261	release_mem_region(res_start, res_size);
	262	return;
	263	}
	264
	265	size = sizeof(struct fb_info) + sizeof(u32) * 17;
	266
	267	info = kmalloc(size, GFP_ATOMIC);
	268
	269	if (info == 0) {
	270	release_mem_region(res_start, res_size);
	271	return;
	272	}
	273	memset(info, 0, size);
	274
	275	fix = &info->fix;
	276	var = &info->var;
	277
	278	strcpy(fix->id, "OFfb ");
	279	strncat(fix->id, name, sizeof(fix->id) - sizeof("OFfb "));
	280	fix->id[sizeof(fix->id) - 1] = '\0';
	281
	282	var->xres = var->xres_virtual = width;
	283	var->yres = var->yres_virtual = height;
	284	fix->line_length = pitch;
	285
	286	fix->smem_start = address;
	287	fix->smem_len = pitch * height;
	288	fix->type = FB_TYPE_PACKED_PIXELS;
	289	fix->type_aux = 0;
	290
	291	par->cmap_type = cmap_unknown;
	292	if (depth == 8) {
cc5d0189	293	/* Palette hacks disabled for now */
1da177e4	294	if (dp && !strncmp(name, "ATY,Rage128", 11)) {
73ea6959 BH	295	par->cmap_adr = offb_map_reg(dp, 2, 0, 0x1fff);
	296	if (par->cmap_adr)
	297	par->cmap_type = cmap_r128;
1da177e4 LT	298	} else if (dp && (!strncmp(name, "ATY,RageM3pA", 12)
1da177e4 LT	299	\|\| !strncmp(name, "ATY,RageM3p12A", 14))) {
73ea6959 BH	300	par->cmap_adr = offb_map_reg(dp, 2, 0, 0x1fff);
	301	if (par->cmap_adr)
	302	par->cmap_type = cmap_M3A;
1da177e4	303	} else if (dp && !strncmp(name, "ATY,RageM3pB", 12)) {
73ea6959 BH	304	par->cmap_adr = offb_map_reg(dp, 2, 0, 0x1fff);
	305	if (par->cmap_adr)
	306	par->cmap_type = cmap_M3B;
1da177e4	307	} else if (dp && !strncmp(name, "ATY,Rage6", 9)) {
73ea6959 BH	308	par->cmap_adr = offb_map_reg(dp, 1, 0, 0x1fff);
	309	if (par->cmap_adr)
	310	par->cmap_type = cmap_radeon;
1da177e4 LT	311	} else if (!strncmp(name, "ATY,", 4)) {
	312	unsigned long base = address & 0xff000000UL;
	313	par->cmap_adr =
	314	ioremap(base + 0x7ff000, 0x1000) + 0xcc0;
	315	par->cmap_data = par->cmap_adr + 1;
	316	par->cmap_type = cmap_m64;
73ea6959 BH	317	} else if (dp && device_is_compatible(dp, "pci1014,b7")) {
	318	par->cmap_adr = offb_map_reg(dp, 0, 0x6000, 0x1000);
	319	if (par->cmap_adr)
	320	par->cmap_type = cmap_gxt2000;
1da177e4	321	}
73ea6959 BH	322	fix->visual = (par->cmap_type != cmap_unknown) ?
73ea6959 BH	323	FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_STATIC_PSEUDOCOLOR;
1da177e4	324	} else
73ea6959	325	fix->visual = FB_VISUAL_TRUECOLOR;
1da177e4 LT	326
1da177e4 LT	327	var->xoffset = var->yoffset = 0;
1da177e4 LT	328	switch (depth) {
	329	case 8:
	330	var->bits_per_pixel = 8;
	331	var->red.offset = 0;
	332	var->red.length = 8;
	333	var->green.offset = 0;
	334	var->green.length = 8;
	335	var->blue.offset = 0;
	336	var->blue.length = 8;
	337	var->transp.offset = 0;
	338	var->transp.length = 0;
	339	break;
ab134466	340	case 15: /* RGB 555 */
1da177e4 LT	341	var->bits_per_pixel = 16;
	342	var->red.offset = 10;
	343	var->red.length = 5;
	344	var->green.offset = 5;
	345	var->green.length = 5;
	346	var->blue.offset = 0;
	347	var->blue.length = 5;
	348	var->transp.offset = 0;
	349	var->transp.length = 0;
	350	break;
ab134466 BH	351	case 16: /* RGB 565 */
	352	var->bits_per_pixel = 16;
	353	var->red.offset = 11;
	354	var->red.length = 5;
	355	var->green.offset = 5;
	356	var->green.length = 6;
	357	var->blue.offset = 0;
	358	var->blue.length = 5;
	359	var->transp.offset = 0;
	360	var->transp.length = 0;
	361	break;
1da177e4 LT	362	case 32: /* RGB 888 */
	363	var->bits_per_pixel = 32;
	364	var->red.offset = 16;
	365	var->red.length = 8;
	366	var->green.offset = 8;
	367	var->green.length = 8;
	368	var->blue.offset = 0;
	369	var->blue.length = 8;
	370	var->transp.offset = 24;
	371	var->transp.length = 8;
	372	break;
	373	}
	374	var->red.msb_right = var->green.msb_right = var->blue.msb_right =
	375	var->transp.msb_right = 0;
	376	var->grayscale = 0;
	377	var->nonstd = 0;
	378	var->activate = 0;
	379	var->height = var->width = -1;
	380	var->pixclock = 10000;
	381	var->left_margin = var->right_margin = 16;
	382	var->upper_margin = var->lower_margin = 16;
	383	var->hsync_len = var->vsync_len = 8;
	384	var->sync = 0;
	385	var->vmode = FB_VMODE_NONINTERLACED;
	386
	387	info->fbops = &offb_ops;
	388	info->screen_base = ioremap(address, fix->smem_len);
	389	info->par = par;
	390	info->pseudo_palette = (void *) (info + 1);
	391	info->flags = FBINFO_DEFAULT;
	392
	393	fb_alloc_cmap(&info->cmap, 256, 0);
	394
	395	if (register_framebuffer(info) < 0) {
	396	kfree(info);
	397	release_mem_region(res_start, res_size);
	398	return;
	399	}
	400
	401	printk(KERN_INFO "fb%d: Open Firmware frame buffer device on %s\n",
	402	info->node, full_name);
	403	}
	404
73ea6959 BH	405
	406	static void __init offb_init_nodriver(struct device_node *dp, int no_real_node)
	407	{
	408	unsigned int len;
	409	int i, width = 640, height = 480, depth = 8, pitch = 640;
	410	unsigned int flags, rsize, addr_prop = 0;
	411	unsigned long max_size = 0;
	412	u64 rstart, address = OF_BAD_ADDR;
	413	u32 pp, addrp, *up;
	414	u64 asize;
	415
	416	pp = (u32 *)get_property(dp, "linux,bootx-depth", &len);
	417	if (pp == NULL)
	418	pp = (u32 *)get_property(dp, "depth", &len);
	419	if (pp && len == sizeof(u32))
	420	depth = *pp;
	421
	422	pp = (u32 *)get_property(dp, "linux,bootx-width", &len);
	423	if (pp == NULL)
	424	pp = (u32 *)get_property(dp, "width", &len);
	425	if (pp && len == sizeof(u32))
	426	width = *pp;
	427
	428	pp = (u32 *)get_property(dp, "linux,bootx-height", &len);
	429	if (pp == NULL)
	430	pp = (u32 *)get_property(dp, "height", &len);
	431	if (pp && len == sizeof(u32))
	432	height = *pp;
	433
	434	pp = (u32 *)get_property(dp, "linux,bootx-linebytes", &len);
	435	if (pp == NULL)
	436	pp = (u32 *)get_property(dp, "linebytes", &len);
	437	if (pp && len == sizeof(u32))
	438	pitch = *pp;
	439	else
	440	pitch = width * ((depth + 7) / 8);
	441
	442	rsize = (unsigned long)pitch * (unsigned long)height;
	443
	444	/* Ok, now we try to figure out the address of the framebuffer.
	445	*
	446	* Unfortunately, Open Firmware doesn't provide a standard way to do
	447	* so. All we can do is a dodgy heuristic that happens to work in
	448	* practice. On most machines, the "address" property contains what
	449	* we need, though not on Matrox cards found in IBM machines. What I've
	450	* found that appears to give good results is to go through the PCI
	451	* ranges and pick one that is both big enough and if possible encloses
	452	* the "address" property. If none match, we pick the biggest
	453	*/
	454	up = (u32 *)get_property(dp, "linux,bootx-addr", &len);
	455	if (up == NULL)
	456	up = (u32 *)get_property(dp, "address", &len);
	457	if (up && len == sizeof(u32))
	458	addr_prop = *up;
	459
	460	/* Hack for when BootX is passing us */
	461	if (no_real_node)
	462	goto skip_addr;
	463
	464	for (i = 0; (addrp = of_get_address(dp, i, &asize, &flags))
	465	!= NULL; i++) {
	466	int match_addrp = 0;
	467
	468	if (!(flags & IORESOURCE_MEM))
469	continue;
470	if (asize < rsize)
471	continue;
472	rstart = of_translate_address(dp, addrp);
473	if (rstart == OF_BAD_ADDR)
474	continue;
475	if (addr_prop && (rstart <= addr_prop) &&
476	((rstart + asize) >= (addr_prop + rsize)))
477	match_addrp = 1;
478	if (match_addrp) {
479	address = addr_prop;
480	break;
481	}
482	if (rsize > max_size) {
483	max_size = rsize;
484	address = OF_BAD_ADDR;
485	}
486
487	if (address == OF_BAD_ADDR)
488	address = rstart;
489	}
490	skip_addr:
491	if (address == OF_BAD_ADDR && addr_prop)
492	address = (u64)addr_prop;
493	if (address != OF_BAD_ADDR) {
494	/* kludge for valkyrie */
495	if (strcmp(dp->name, "valkyrie") == 0)
496	address += 0x1000;
497	offb_init_fb(no_real_node ? "bootx" : dp->name,
498	no_real_node ? "display" : dp->full_name,
499	width, height, depth, pitch, address,
500	no_real_node ? dp : NULL);
501	}
502	}
503
504	static int __init offb_init(void)
505	{
506	struct device_node dp = NULL, boot_disp = NULL;
507
508	if (fb_get_options("offb", NULL))
509	return -ENODEV;
510
511	/* Check if we have a MacOS display without a node spec */
512	if (get_property(of_chosen, "linux,bootx-noscreen", NULL) != NULL) {
513	/* The old code tried to work out which node was the MacOS
514	* display based on the address. I'm dropping that since the
515	* lack of a node spec only happens with old BootX versions
516	* (users can update) and with this code, they'll still get
517	* a display (just not the palette hacks).
518	*/
519	offb_init_nodriver(of_chosen, 1);
520	}
521
522	for (dp = NULL; (dp = of_find_node_by_type(dp, "display"));) {
523	if (get_property(dp, "linux,opened", NULL) &&
524	get_property(dp, "linux,boot-display", NULL)) {
525	boot_disp = dp;
526	offb_init_nodriver(dp, 0);
527	}
528	}
529	for (dp = NULL; (dp = of_find_node_by_type(dp, "display"));) {
530	if (get_property(dp, "linux,opened", NULL) &&
531	dp != boot_disp)
532	offb_init_nodriver(dp, 0);
533	}
534
535	return 0;
536	}
537
538
1da177e4 LT	539	module_init(offb_init);
1da177e4 LT	540	MODULE_LICENSE("GPL");