[mirror_ubuntu-zesty-kernel.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/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 <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;

	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;
		u32 *addrp;
		u64 daddr, dsize;
		unsigned int flags;

		/* find the device node corresponding to the macos display */
		while ((dp = of_find_node_by_type(dp, "display"))) {
			int i;

			/*
			 * Look for an AAPL,address property first.
			 */
			unsigned 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) {
						macos_display = dp;
						goto foundit;
					}
			}

			/*
			 * See if the display address is in one of the address
			 * ranges for this display.
			 */
			i = 0;
			for (;;) {
				addrp = of_get_address(dp, i++, &dsize, &flags);
				if (addrp == NULL)
					break;
				if (!(flags & IORESOURCE_MEM))
					continue;
				daddr = of_translate_address(dp, addrp);
				if (daddr == OF_BAD_ADDR)
					continue;
				if (daddr <= addr && addr < (daddr + dsize)) {
					macos_display = dp;
					goto foundit;
				}
			}
		foundit:
			if (macos_display) {
				printk(KERN_INFO "MacOS display is %s\n",
				       dp->full_name);
				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 int flags, rsize, *up;
	u64 address = OF_BAD_ADDR;
	u32 *addrp;
	u64 asize;

	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;

       rsize = (unsigned long)pitch * (unsigned long)height *
               (unsigned long)(depth / 8);

       /* Try to match device to a PCI device in order to get a properly
	* translated address rather then trying to decode the open firmware
	* stuff in various incorrect ways
	*/
#ifdef CONFIG_PCI
       /* First try to locate the PCI device if any */
       {
               struct pci_dev *pdev = NULL;

	       for_each_pci_dev(pdev) {
                       if (dp == pci_device_to_OF_node(pdev))
                               break;
	       }
               if (pdev) {
                       for (i = 0; i < 6 && address == OF_BAD_ADDR; i++) {
                               if ((pci_resource_flags(pdev, i) &
				    IORESOURCE_MEM) &&
				   (pci_resource_len(pdev, i) >= rsize))
                                       address = pci_resource_start(pdev, i);
                       }
		       pci_dev_put(pdev);
               }
        }
#endif /* CONFIG_PCI */

       /* This one is dodgy, we may drop it ... */
       if (address == OF_BAD_ADDR &&
	   (up = (unsigned *) get_property(dp, "address", &len)) != NULL &&
	   len == sizeof(unsigned int))
	       address = (u64) * up;

       if (address == OF_BAD_ADDR) {
	       for (i = 0; (addrp = of_get_address(dp, i, &asize, &flags))
			    != NULL; i++) {
		       if (!(flags & IORESOURCE_MEM))
			       continue;
		       if (asize >= pitch * height * depth / 8)
			       break;
	       }
		if (addrp == NULL) {
			printk(KERN_ERR
			       "no framebuffer address found for %s\n",
			       dp->full_name);
			return;
		}
		address = of_translate_address(dp, addrp);
		if (address == OF_BAD_ADDR) {
			printk(KERN_ERR
			       "can't translate framebuffer address for %s\n",
			       dp->full_name);
			return;
		}

		/* 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) {

		/* 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;
	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");
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
	15	#include <linux/config.h>
	16	#include <linux/module.h>
	17	#include <linux/kernel.h>
	18	#include <linux/errno.h>
	19	#include <linux/string.h>
	20	#include <linux/mm.h>
	21	#include <linux/tty.h>
	22	#include <linux/slab.h>
	23	#include <linux/vmalloc.h>
	24	#include <linux/delay.h>
	25	#include <linux/interrupt.h>
	26	#include <linux/fb.h>
	27	#include <linux/init.h>
	28	#include <linux/ioport.h>
f365cfd0	29	#include <linux/pci.h>
1da177e4 LT	30	#include <asm/io.h>
	31	#include <asm/prom.h>
	32
	33	#ifdef CONFIG_PPC64
	34	#include <asm/pci-bridge.h>
	35	#endif
	36
	37	#ifdef CONFIG_PPC32
	38	#include <asm/bootx.h>
	39	#endif
	40
	41	#include "macmodes.h"
	42
	43	/* Supported palette hacks */
	44	enum {
	45	cmap_unknown,
	46	cmap_m64, /* ATI Mach64 */
	47	cmap_r128, /* ATI Rage128 */
	48	cmap_M3A, /* ATI Rage Mobility M3 Head A */
	49	cmap_M3B, /* ATI Rage Mobility M3 Head B */
	50	cmap_radeon, /* ATI Radeon */
	51	cmap_gxt2000, /* IBM GXT2000 */
	52	};
	53
	54	struct offb_par {
	55	volatile void __iomem *cmap_adr;
	56	volatile void __iomem *cmap_data;
	57	int cmap_type;
	58	int blanked;
	59	};
	60
	61	struct offb_par default_par;
	62
	63	/*
	64	* Interface used by the world
	65	*/
	66
	67	int offb_init(void);
	68
	69	static int offb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
	70	u_int transp, struct fb_info *info);
	71	static int offb_blank(int blank, struct fb_info *info);
	72
	73	#ifdef CONFIG_PPC32
	74	extern boot_infos_t *boot_infos;
	75	#endif
	76
	77	static void offb_init_nodriver(struct device_node *);
	78	static void offb_init_fb(const char name, const char full_name,
	79	int width, int height, int depth, int pitch,
	80	unsigned long address, struct device_node *dp);
	81
	82	static struct fb_ops offb_ops = {
	83	.owner = THIS_MODULE,
	84	.fb_setcolreg = offb_setcolreg,
	85	.fb_blank = offb_blank,
	86	.fb_fillrect = cfb_fillrect,
	87	.fb_copyarea = cfb_copyarea,
	88	.fb_imageblit = cfb_imageblit,
1da177e4 LT	89	};
	90
	91	/*
	92	* Set a single color register. The values supplied are already
	93	* rounded down to the hardware's capabilities (according to the
	94	* entries in the var structure). Return != 0 for invalid regno.
	95	*/
	96
	97	static int offb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
	98	u_int transp, struct fb_info *info)
	99	{
	100	struct offb_par par = (struct offb_par ) info->par;
	101
	102	if (!par->cmap_adr \|\| regno > 255)
	103	return 1;
	104
	105	red >>= 8;
	106	green >>= 8;
	107	blue >>= 8;
	108
	109	switch (par->cmap_type) {
	110	case cmap_m64:
	111	writeb(regno, par->cmap_adr);
	112	writeb(red, par->cmap_data);
	113	writeb(green, par->cmap_data);
	114	writeb(blue, par->cmap_data);
	115	break;
	116	case cmap_M3A:
	117	/* Clear PALETTE_ACCESS_CNTL in DAC_CNTL */
	118	out_le32(par->cmap_adr + 0x58,
	119	in_le32(par->cmap_adr + 0x58) & ~0x20);
	120	case cmap_r128:
	121	/* Set palette index & data */
	122	out_8(par->cmap_adr + 0xb0, regno);
	123	out_le32(par->cmap_adr + 0xb4,
	124	(red << 16 \| green << 8 \| blue));
	125	break;
	126	case cmap_M3B:
	127	/* Set PALETTE_ACCESS_CNTL in DAC_CNTL */
	128	out_le32(par->cmap_adr + 0x58,
	129	in_le32(par->cmap_adr + 0x58) \| 0x20);
	130	/* Set palette index & data */
	131	out_8(par->cmap_adr + 0xb0, regno);
	132	out_le32(par->cmap_adr + 0xb4, (red << 16 \| green << 8 \| blue));
	133	break;
	134	case cmap_radeon:
	135	/* Set palette index & data (could be smarter) */
	136	out_8(par->cmap_adr + 0xb0, regno);
	137	out_le32(par->cmap_adr + 0xb4, (red << 16 \| green << 8 \| blue));
	138	break;
	139	case cmap_gxt2000:
	140	out_le32((unsigned __iomem *) par->cmap_adr + regno,
	141	(red << 16 \| green << 8 \| blue));
	142	break;
	143	}
	144
	145	if (regno < 16)
	146	switch (info->var.bits_per_pixel) {
	147	case 16:
	148	((u16 *) (info->pseudo_palette))[regno] =
	149	(regno << 10) \| (regno << 5) \| regno;
	150	break;
	151	case 32:
	152	{
153	int i = (regno << 8) \| regno;
154	((u32 *) (info->pseudo_palette))[regno] =
155	(i << 16) \| i;
156	break;
157	}
158	}
159	return 0;
160	}
161
162	/*
163	* Blank the display.
164	*/
165
166	static int offb_blank(int blank, struct fb_info *info)
167	{
168	struct offb_par par = (struct offb_par ) info->par;
169	int i, j;
170
171	if (!par->cmap_adr)
172	return 0;
173
174	if (!par->blanked)
175	if (!blank)
176	return 0;
177
178	par->blanked = blank;
179
180	if (blank)
181	for (i = 0; i < 256; i++) {
182	switch (par->cmap_type) {
183	case cmap_m64:
184	writeb(i, par->cmap_adr);
185	for (j = 0; j < 3; j++)
186	writeb(0, par->cmap_data);
187	break;
188	case cmap_M3A:
189	/* Clear PALETTE_ACCESS_CNTL in DAC_CNTL */
190	out_le32(par->cmap_adr + 0x58,
191	in_le32(par->cmap_adr + 0x58) & ~0x20);
192	case cmap_r128:
193	/* Set palette index & data */
194	out_8(par->cmap_adr + 0xb0, i);
195	out_le32(par->cmap_adr + 0xb4, 0);
196	break;
197	case cmap_M3B:
198	/* Set PALETTE_ACCESS_CNTL in DAC_CNTL */
199	out_le32(par->cmap_adr + 0x58,
200	in_le32(par->cmap_adr + 0x58) \| 0x20);
201	/* Set palette index & data */
202	out_8(par->cmap_adr + 0xb0, i);
203	out_le32(par->cmap_adr + 0xb4, 0);
204	break;
205	case cmap_radeon:
206	out_8(par->cmap_adr + 0xb0, i);
207	out_le32(par->cmap_adr + 0xb4, 0);
208	break;
209	case cmap_gxt2000:
210	out_le32((unsigned __iomem *) par->cmap_adr + i,
211	0);
212	break;
213	}
214	} else
215	fb_set_cmap(&info->cmap, info);
216	return 0;
217	}
218
219	/*
220	* Initialisation
221	*/
222
223	int __init offb_init(void)
224	{
225	struct device_node dp = NULL, boot_disp = NULL;
cc5d0189	226
1da177e4 LT	227	#if defined(CONFIG_BOOTX_TEXT) && defined(CONFIG_PPC32)
	228	struct device_node *macos_display = NULL;
	229	#endif
	230	if (fb_get_options("offb", NULL))
	231	return -ENODEV;
	232
	233	#if defined(CONFIG_BOOTX_TEXT) && defined(CONFIG_PPC32)
	234	/* If we're booted from BootX... */
	235	if (boot_infos != 0) {
	236	unsigned long addr =
	237	(unsigned long) boot_infos->dispDeviceBase;
cc5d0189 BH	238	u32 *addrp;
	239	u64 daddr, dsize;
	240	unsigned int flags;
	241
1da177e4 LT	242	/* find the device node corresponding to the macos display */
	243	while ((dp = of_find_node_by_type(dp, "display"))) {
	244	int i;
1da177e4 LT	245
1da177e4 LT	246	/*
cc5d0189	247	* Look for an AAPL,address property first.
1da177e4	248	*/
cc5d0189 BH	249	unsigned int na;
	250	unsigned int *ap =
	251	(unsigned int *)get_property(dp, "AAPL,address",
	252	&na);
	253	if (ap != 0) {
	254	for (na /= sizeof(unsigned int); na > 0;
	255	--na, ++ap)
	256	if (*ap <= addr &&
	257	addr < *ap + 0x1000000) {
	258	macos_display = dp;
	259	goto foundit;
	260	}
1da177e4 LT	261	}
	262
	263	/*
	264	* See if the display address is in one of the address
	265	* ranges for this display.
	266	*/
cc5d0189 BH	267	i = 0;
	268	for (;;) {
	269	addrp = of_get_address(dp, i++, &dsize, &flags);
	270	if (addrp == NULL)
1da177e4	271	break;
cc5d0189 BH	272	if (!(flags & IORESOURCE_MEM))
	273	continue;
	274	daddr = of_translate_address(dp, addrp);
	275	if (daddr == OF_BAD_ADDR)
	276	continue;
	277	if (daddr <= addr && addr < (daddr + dsize)) {
	278	macos_display = dp;
	279	goto foundit;
	280	}
1da177e4	281	}
cc5d0189 BH	282	foundit:
cc5d0189 BH	283	if (macos_display) {
1da177e4 LT	284	printk(KERN_INFO "MacOS display is %s\n",
1da177e4 LT	285	dp->full_name);
1da177e4 LT	286	break;
	287	}
	288	}
	289
	290	/* initialize it */
	291	offb_init_fb(macos_display ? macos_display->
	292	name : "MacOS display",
	293	macos_display ? macos_display->
	294	full_name : "MacOS display",
	295	boot_infos->dispDeviceRect[2],
	296	boot_infos->dispDeviceRect[3],
	297	boot_infos->dispDeviceDepth,
	298	boot_infos->dispDeviceRowBytes, addr, NULL);
	299	}
	300	#endif /* defined(CONFIG_BOOTX_TEXT) && defined(CONFIG_PPC32) */
	301
	302	for (dp = NULL; (dp = of_find_node_by_type(dp, "display"));) {
	303	if (get_property(dp, "linux,opened", NULL) &&
	304	get_property(dp, "linux,boot-display", NULL)) {
	305	boot_disp = dp;
	306	offb_init_nodriver(dp);
	307	}
	308	}
	309	for (dp = NULL; (dp = of_find_node_by_type(dp, "display"));) {
	310	if (get_property(dp, "linux,opened", NULL) &&
	311	dp != boot_disp)
	312	offb_init_nodriver(dp);
	313	}
	314
	315	return 0;
	316	}
	317
	318
	319	static void __init offb_init_nodriver(struct device_node *dp)
	320	{
	321	int *pp, i;
	322	unsigned int len;
	323	int width = 640, height = 480, depth = 8, pitch;
cc5d0189 BH	324	unsigned int flags, rsize, *up;
	325	u64 address = OF_BAD_ADDR;
	326	u32 *addrp;
	327	u64 asize;
1da177e4 LT	328
	329	if ((pp = (int *) get_property(dp, "depth", &len)) != NULL
	330	&& len == sizeof(int))
	331	depth = *pp;
	332	if ((pp = (int *) get_property(dp, "width", &len)) != NULL
	333	&& len == sizeof(int))
	334	width = *pp;
	335	if ((pp = (int *) get_property(dp, "height", &len)) != NULL
	336	&& len == sizeof(int))
	337	height = *pp;
	338	if ((pp = (int *) get_property(dp, "linebytes", &len)) != NULL
	339	&& len == sizeof(int)) {
	340	pitch = *pp;
	341	if (pitch == 1)
	342	pitch = 0x1000;
	343	} else
	344	pitch = width;
b341e32e BH	345
	346	rsize = (unsigned long)pitch * (unsigned long)height *
	347	(unsigned long)(depth / 8);
	348
	349	/* Try to match device to a PCI device in order to get a properly
	350	* translated address rather then trying to decode the open firmware
	351	* stuff in various incorrect ways
	352	*/
	353	#ifdef CONFIG_PCI
	354	/* First try to locate the PCI device if any */
	355	{
	356	struct pci_dev *pdev = NULL;
	357
	358	for_each_pci_dev(pdev) {
	359	if (dp == pci_device_to_OF_node(pdev))
	360	break;
	361	}
	362	if (pdev) {
cc5d0189	363	for (i = 0; i < 6 && address == OF_BAD_ADDR; i++) {
b341e32e BH	364	if ((pci_resource_flags(pdev, i) &
	365	IORESOURCE_MEM) &&
	366	(pci_resource_len(pdev, i) >= rsize))
	367	address = pci_resource_start(pdev, i);
	368	}
	369	pci_dev_put(pdev);
	370	}
	371	}
	372	#endif /* CONFIG_PCI */
	373
cc5d0189 BH	374	/* This one is dodgy, we may drop it ... */
	375	if (address == OF_BAD_ADDR &&
	376	(up = (unsigned *) get_property(dp, "address", &len)) != NULL &&
	377	len == sizeof(unsigned int))
	378	address = (u64) * up;
	379
	380	if (address == OF_BAD_ADDR) {
	381	for (i = 0; (addrp = of_get_address(dp, i, &asize, &flags))
	382	!= NULL; i++) {
	383	if (!(flags & IORESOURCE_MEM))
	384	continue;
	385	if (asize >= pitch * height * depth / 8)
	386	break;
	387	}
	388	if (addrp == NULL) {
1da177e4 LT	389	printk(KERN_ERR
	390	"no framebuffer address found for %s\n",
	391	dp->full_name);
	392	return;
	393	}
cc5d0189 BH	394	address = of_translate_address(dp, addrp);
	395	if (address == OF_BAD_ADDR) {
	396	printk(KERN_ERR
	397	"can't translate framebuffer address for %s\n",
	398	dp->full_name);
	399	return;
	400	}
1da177e4 LT	401
	402	/* kludge for valkyrie */
	403	if (strcmp(dp->name, "valkyrie") == 0)
	404	address += 0x1000;
	405	}
	406	offb_init_fb(dp->name, dp->full_name, width, height, depth,
	407	pitch, address, dp);
	408
	409	}
	410
	411	static void __init offb_init_fb(const char name, const char full_name,
	412	int width, int height, int depth,
	413	int pitch, unsigned long address,
	414	struct device_node *dp)
	415	{
	416	unsigned long res_size = pitch * height * depth / 8;
	417	struct offb_par *par = &default_par;
	418	unsigned long res_start = address;
	419	struct fb_fix_screeninfo *fix;
	420	struct fb_var_screeninfo *var;
	421	struct fb_info *info;
	422	int size;
	423
	424	if (!request_mem_region(res_start, res_size, "offb"))
	425	return;
	426
	427	printk(KERN_INFO
	428	"Using unsupported %dx%d %s at %lx, depth=%d, pitch=%d\n",
	429	width, height, name, address, depth, pitch);
	430	if (depth != 8 && depth != 16 && depth != 32) {
	431	printk(KERN_ERR "%s: can't use depth = %d\n", full_name,
	432	depth);
	433	release_mem_region(res_start, res_size);
	434	return;
	435	}
	436
	437	size = sizeof(struct fb_info) + sizeof(u32) * 17;
	438
	439	info = kmalloc(size, GFP_ATOMIC);
	440
	441	if (info == 0) {
	442	release_mem_region(res_start, res_size);
	443	return;
	444	}
	445	memset(info, 0, size);
	446
	447	fix = &info->fix;
	448	var = &info->var;
	449
	450	strcpy(fix->id, "OFfb ");
	451	strncat(fix->id, name, sizeof(fix->id) - sizeof("OFfb "));
	452	fix->id[sizeof(fix->id) - 1] = '\0';
	453
	454	var->xres = var->xres_virtual = width;
	455	var->yres = var->yres_virtual = height;
	456	fix->line_length = pitch;
	457
	458	fix->smem_start = address;
	459	fix->smem_len = pitch * height;
	460	fix->type = FB_TYPE_PACKED_PIXELS;
	461	fix->type_aux = 0;
	462
	463	par->cmap_type = cmap_unknown;
	464	if (depth == 8) {
cc5d0189 BH	465
	466	/* Palette hacks disabled for now */
	467	#if 0
1da177e4 LT	468	if (dp && !strncmp(name, "ATY,Rage128", 11)) {
	469	unsigned long regbase = dp->addrs[2].address;
	470	par->cmap_adr = ioremap(regbase, 0x1FFF);
	471	par->cmap_type = cmap_r128;
	472	} else if (dp && (!strncmp(name, "ATY,RageM3pA", 12)
	473	\|\| !strncmp(name, "ATY,RageM3p12A", 14))) {
	474	unsigned long regbase =
	475	dp->parent->addrs[2].address;
	476	par->cmap_adr = ioremap(regbase, 0x1FFF);
	477	par->cmap_type = cmap_M3A;
	478	} else if (dp && !strncmp(name, "ATY,RageM3pB", 12)) {
	479	unsigned long regbase =
	480	dp->parent->addrs[2].address;
	481	par->cmap_adr = ioremap(regbase, 0x1FFF);
	482	par->cmap_type = cmap_M3B;
	483	} else if (dp && !strncmp(name, "ATY,Rage6", 9)) {
	484	unsigned long regbase = dp->addrs[1].address;
	485	par->cmap_adr = ioremap(regbase, 0x1FFF);
	486	par->cmap_type = cmap_radeon;
	487	} else if (!strncmp(name, "ATY,", 4)) {
	488	unsigned long base = address & 0xff000000UL;
	489	par->cmap_adr =
	490	ioremap(base + 0x7ff000, 0x1000) + 0xcc0;
	491	par->cmap_data = par->cmap_adr + 1;
	492	par->cmap_type = cmap_m64;
	493	} else if (device_is_compatible(dp, "pci1014,b7")) {
	494	unsigned long regbase = dp->addrs[0].address;
	495	par->cmap_adr = ioremap(regbase + 0x6000, 0x1000);
	496	par->cmap_type = cmap_gxt2000;
	497	}
cc5d0189	498	#endif
1da177e4 LT	499	fix->visual = par->cmap_adr ? FB_VISUAL_PSEUDOCOLOR
	500	: FB_VISUAL_STATIC_PSEUDOCOLOR;
	501	} else
	502	fix->visual = /* par->cmap_adr ? FB_VISUAL_DIRECTCOLOR
	503	: */ FB_VISUAL_TRUECOLOR;
	504
	505	var->xoffset = var->yoffset = 0;
	506	var->bits_per_pixel = depth;
	507	switch (depth) {
	508	case 8:
	509	var->bits_per_pixel = 8;
	510	var->red.offset = 0;
	511	var->red.length = 8;
	512	var->green.offset = 0;
	513	var->green.length = 8;
	514	var->blue.offset = 0;
	515	var->blue.length = 8;
	516	var->transp.offset = 0;
	517	var->transp.length = 0;
	518	break;
	519	case 16: /* RGB 555 */
	520	var->bits_per_pixel = 16;
	521	var->red.offset = 10;
	522	var->red.length = 5;
	523	var->green.offset = 5;
	524	var->green.length = 5;
	525	var->blue.offset = 0;
	526	var->blue.length = 5;
	527	var->transp.offset = 0;
	528	var->transp.length = 0;
	529	break;
	530	case 32: /* RGB 888 */
	531	var->bits_per_pixel = 32;
	532	var->red.offset = 16;
	533	var->red.length = 8;
	534	var->green.offset = 8;
	535	var->green.length = 8;
	536	var->blue.offset = 0;
	537	var->blue.length = 8;
	538	var->transp.offset = 24;
	539	var->transp.length = 8;
	540	break;
	541	}
	542	var->red.msb_right = var->green.msb_right = var->blue.msb_right =
	543	var->transp.msb_right = 0;
	544	var->grayscale = 0;
	545	var->nonstd = 0;
	546	var->activate = 0;
	547	var->height = var->width = -1;
	548	var->pixclock = 10000;
	549	var->left_margin = var->right_margin = 16;
	550	var->upper_margin = var->lower_margin = 16;
	551	var->hsync_len = var->vsync_len = 8;
	552	var->sync = 0;
	553	var->vmode = FB_VMODE_NONINTERLACED;
	554
	555	info->fbops = &offb_ops;
	556	info->screen_base = ioremap(address, fix->smem_len);
	557	info->par = par;
	558	info->pseudo_palette = (void *) (info + 1);
	559	info->flags = FBINFO_DEFAULT;
	560
	561	fb_alloc_cmap(&info->cmap, 256, 0);
	562
563	if (register_framebuffer(info) < 0) {
564	kfree(info);
565	release_mem_region(res_start, res_size);
566	return;
567	}
568
569	printk(KERN_INFO "fb%d: Open Firmware frame buffer device on %s\n",
570	info->node, full_name);
571	}
572
573	module_init(offb_init);
574	MODULE_LICENSE("GPL");