[deliverable/linux.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 <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 int rsize, *up;
	unsigned long address = 0;

	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 == 0; 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 */

	if (address == 0 &&
	    (up = (unsigned *) get_property(dp, "address", &len)) != NULL &&
	    len == sizeof(unsigned))
		address = (u_long) * up;
	if (address == 0) {
		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");
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>
	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;
	100
	101	if (!par->cmap_adr \|\| regno > 255)
	102	return 1;
	103
	104	red >>= 8;
	105	green >>= 8;
	106	blue >>= 8;
	107
	108	switch (par->cmap_type) {
	109	case cmap_m64:
	110	writeb(regno, par->cmap_adr);
	111	writeb(red, par->cmap_data);
	112	writeb(green, par->cmap_data);
	113	writeb(blue, par->cmap_data);
	114	break;
	115	case cmap_M3A:
	116	/* Clear PALETTE_ACCESS_CNTL in DAC_CNTL */
	117	out_le32(par->cmap_adr + 0x58,
	118	in_le32(par->cmap_adr + 0x58) & ~0x20);
	119	case cmap_r128:
	120	/* Set palette index & data */
	121	out_8(par->cmap_adr + 0xb0, regno);
	122	out_le32(par->cmap_adr + 0xb4,
	123	(red << 16 \| green << 8 \| blue));
	124	break;
	125	case cmap_M3B:
	126	/* Set PALETTE_ACCESS_CNTL in DAC_CNTL */
	127	out_le32(par->cmap_adr + 0x58,
	128	in_le32(par->cmap_adr + 0x58) \| 0x20);
	129	/* Set palette index & data */
	130	out_8(par->cmap_adr + 0xb0, regno);
	131	out_le32(par->cmap_adr + 0xb4, (red << 16 \| green << 8 \| blue));
	132	break;
	133	case cmap_radeon:
	134	/* Set palette index & data (could be smarter) */
	135	out_8(par->cmap_adr + 0xb0, regno);
	136	out_le32(par->cmap_adr + 0xb4, (red << 16 \| green << 8 \| blue));
	137	break;
	138	case cmap_gxt2000:
	139	out_le32((unsigned __iomem *) par->cmap_adr + regno,
	140	(red << 16 \| green << 8 \| blue));
	141	break;
	142	}
	143
	144	if (regno < 16)
	145	switch (info->var.bits_per_pixel) {
	146	case 16:
	147	((u16 *) (info->pseudo_palette))[regno] =
	148	(regno << 10) \| (regno << 5) \| regno;
	149	break;
	150	case 32:
	151	{
152	int i = (regno << 8) \| regno;
153	((u32 *) (info->pseudo_palette))[regno] =
154	(i << 16) \| i;
155	break;
156	}
157	}
158	return 0;
159	}
160
161	/*
162	* Blank the display.
163	*/
164
165	static int offb_blank(int blank, struct fb_info *info)
166	{
167	struct offb_par par = (struct offb_par ) info->par;
168	int i, j;
169
170	if (!par->cmap_adr)
171	return 0;
172
173	if (!par->blanked)
174	if (!blank)
175	return 0;
176
177	par->blanked = blank;
178
179	if (blank)
180	for (i = 0; i < 256; i++) {
181	switch (par->cmap_type) {
182	case cmap_m64:
183	writeb(i, par->cmap_adr);
184	for (j = 0; j < 3; j++)
185	writeb(0, par->cmap_data);
186	break;
187	case cmap_M3A:
188	/* Clear PALETTE_ACCESS_CNTL in DAC_CNTL */
189	out_le32(par->cmap_adr + 0x58,
190	in_le32(par->cmap_adr + 0x58) & ~0x20);
191	case cmap_r128:
192	/* Set palette index & data */
193	out_8(par->cmap_adr + 0xb0, i);
194	out_le32(par->cmap_adr + 0xb4, 0);
195	break;
196	case cmap_M3B:
197	/* Set PALETTE_ACCESS_CNTL in DAC_CNTL */
198	out_le32(par->cmap_adr + 0x58,
199	in_le32(par->cmap_adr + 0x58) \| 0x20);
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_radeon:
205	out_8(par->cmap_adr + 0xb0, i);
206	out_le32(par->cmap_adr + 0xb4, 0);
207	break;
208	case cmap_gxt2000:
209	out_le32((unsigned __iomem *) par->cmap_adr + i,
210	0);
211	break;
212	}
213	} else
214	fb_set_cmap(&info->cmap, info);
215	return 0;
216	}
217
218	/*
219	* Initialisation
220	*/
221
222	int __init offb_init(void)
223	{
224	struct device_node dp = NULL, boot_disp = NULL;
225	#if defined(CONFIG_BOOTX_TEXT) && defined(CONFIG_PPC32)
226	struct device_node *macos_display = NULL;
227	#endif
228	if (fb_get_options("offb", NULL))
229	return -ENODEV;
230
231	#if defined(CONFIG_BOOTX_TEXT) && defined(CONFIG_PPC32)
232	/* If we're booted from BootX... */
233	if (boot_infos != 0) {
234	unsigned long addr =
235	(unsigned long) boot_infos->dispDeviceBase;
236	/* find the device node corresponding to the macos display */
237	while ((dp = of_find_node_by_type(dp, "display"))) {
238	int i;
239	/*
240	* Grrr... It looks like the MacOS ATI driver
241	* munges the assigned-addresses property (but
242	* the AAPL,address value is OK).
243	*/
244	if (strncmp(dp->name, "ATY,", 4) == 0
245	&& dp->n_addrs == 1) {
246	unsigned int *ap =
247	(unsigned int *) get_property(dp,
248	"AAPL,address",
249	NULL);
250	if (ap != NULL) {
251	dp->addrs[0].address = *ap;
252	dp->addrs[0].size = 0x01000000;
253	}
254	}
255
256	/*
257	* The LTPro on the Lombard powerbook has no addresses
258	* on the display nodes, they are on their parent.
259	*/
260	if (dp->n_addrs == 0
261	&& device_is_compatible(dp, "ATY,264LTPro")) {
262	int na;
263	unsigned int ap = (unsigned int )
264	get_property(dp, "AAPL,address", &na);
265	if (ap != 0)
266	for (na /= sizeof(unsigned int);
267	na > 0; --na, ++ap)
268	if (*ap <= addr
269	&& addr <
270	*ap + 0x1000000)
271	goto foundit;
272	}
273
274	/*
275	* See if the display address is in one of the address
276	* ranges for this display.
277	*/
278	for (i = 0; i < dp->n_addrs; ++i) {
279	if (dp->addrs[i].address <= addr
280	&& addr <
281	dp->addrs[i].address +
282	dp->addrs[i].size)
283	break;
284	}
285	if (i < dp->n_addrs) {
286	foundit:
287	printk(KERN_INFO "MacOS display is %s\n",
288	dp->full_name);
289	macos_display = dp;
290	break;
291	}
292	}
293
294	/* initialize it */
295	offb_init_fb(macos_display ? macos_display->
296	name : "MacOS display",
297	macos_display ? macos_display->
298	full_name : "MacOS display",
299	boot_infos->dispDeviceRect[2],
300	boot_infos->dispDeviceRect[3],
301	boot_infos->dispDeviceDepth,
302	boot_infos->dispDeviceRowBytes, addr, NULL);
303	}
304	#endif /* defined(CONFIG_BOOTX_TEXT) && defined(CONFIG_PPC32) */
305
306	for (dp = NULL; (dp = of_find_node_by_type(dp, "display"));) {
307	if (get_property(dp, "linux,opened", NULL) &&
308	get_property(dp, "linux,boot-display", NULL)) {
309	boot_disp = dp;
310	offb_init_nodriver(dp);
311	}
312	}
313	for (dp = NULL; (dp = of_find_node_by_type(dp, "display"));) {
314	if (get_property(dp, "linux,opened", NULL) &&
315	dp != boot_disp)
316	offb_init_nodriver(dp);
317	}
318
319	return 0;
320	}
321
322
323	static void __init offb_init_nodriver(struct device_node *dp)
324	{
325	int *pp, i;
326	unsigned int len;
327	int width = 640, height = 480, depth = 8, pitch;
b341e32e BH	328	unsigned int rsize, *up;
b341e32e BH	329	unsigned long address = 0;
1da177e4 LT	330
	331	if ((pp = (int *) get_property(dp, "depth", &len)) != NULL
	332	&& len == sizeof(int))
	333	depth = *pp;
	334	if ((pp = (int *) get_property(dp, "width", &len)) != NULL
	335	&& len == sizeof(int))
	336	width = *pp;
	337	if ((pp = (int *) get_property(dp, "height", &len)) != NULL
	338	&& len == sizeof(int))
	339	height = *pp;
	340	if ((pp = (int *) get_property(dp, "linebytes", &len)) != NULL
	341	&& len == sizeof(int)) {
	342	pitch = *pp;
	343	if (pitch == 1)
	344	pitch = 0x1000;
	345	} else
	346	pitch = width;
b341e32e BH	347
	348	rsize = (unsigned long)pitch * (unsigned long)height *
	349	(unsigned long)(depth / 8);
	350
	351	/* Try to match device to a PCI device in order to get a properly
	352	* translated address rather then trying to decode the open firmware
	353	* stuff in various incorrect ways
	354	*/
	355	#ifdef CONFIG_PCI
	356	/* First try to locate the PCI device if any */
	357	{
	358	struct pci_dev *pdev = NULL;
	359
	360	for_each_pci_dev(pdev) {
	361	if (dp == pci_device_to_OF_node(pdev))
	362	break;
	363	}
	364	if (pdev) {
	365	for (i = 0; i < 6 && address == 0; i++) {
	366	if ((pci_resource_flags(pdev, i) &
	367	IORESOURCE_MEM) &&
	368	(pci_resource_len(pdev, i) >= rsize))
	369	address = pci_resource_start(pdev, i);
	370	}
	371	pci_dev_put(pdev);
	372	}
	373	}
	374	#endif /* CONFIG_PCI */
	375
	376	if (address == 0 &&
	377	(up = (unsigned *) get_property(dp, "address", &len)) != NULL &&
	378	len == sizeof(unsigned))
1da177e4	379	address = (u_long) * up;
b341e32e	380	if (address == 0) {
1da177e4 LT	381	for (i = 0; i < dp->n_addrs; ++i)
	382	if (dp->addrs[i].size >=
	383	pitch * height * depth / 8)
	384	break;
	385	if (i >= dp->n_addrs) {
	386	printk(KERN_ERR
	387	"no framebuffer address found for %s\n",
	388	dp->full_name);
	389	return;
	390	}
	391
	392	address = (u_long) dp->addrs[i].address;
	393
	394	#ifdef CONFIG_PPC64
1635317f	395	address += ((struct pci_dn *)dp->data)->phb->pci_mem_offset;
1da177e4 LT	396	#endif
	397
	398	/* kludge for valkyrie */
	399	if (strcmp(dp->name, "valkyrie") == 0)
	400	address += 0x1000;
	401	}
	402	offb_init_fb(dp->name, dp->full_name, width, height, depth,
	403	pitch, address, dp);
	404
	405	}
	406
	407	static void __init offb_init_fb(const char name, const char full_name,
	408	int width, int height, int depth,
	409	int pitch, unsigned long address,
	410	struct device_node *dp)
	411	{
	412	unsigned long res_size = pitch * height * depth / 8;
	413	struct offb_par *par = &default_par;
	414	unsigned long res_start = address;
	415	struct fb_fix_screeninfo *fix;
	416	struct fb_var_screeninfo *var;
	417	struct fb_info *info;
	418	int size;
	419
	420	if (!request_mem_region(res_start, res_size, "offb"))
	421	return;
	422
	423	printk(KERN_INFO
	424	"Using unsupported %dx%d %s at %lx, depth=%d, pitch=%d\n",
	425	width, height, name, address, depth, pitch);
	426	if (depth != 8 && depth != 16 && depth != 32) {
	427	printk(KERN_ERR "%s: can't use depth = %d\n", full_name,
	428	depth);
	429	release_mem_region(res_start, res_size);
	430	return;
	431	}
	432
	433	size = sizeof(struct fb_info) + sizeof(u32) * 17;
	434
	435	info = kmalloc(size, GFP_ATOMIC);
	436
	437	if (info == 0) {
	438	release_mem_region(res_start, res_size);
	439	return;
	440	}
	441	memset(info, 0, size);
	442
	443	fix = &info->fix;
	444	var = &info->var;
	445
	446	strcpy(fix->id, "OFfb ");
	447	strncat(fix->id, name, sizeof(fix->id) - sizeof("OFfb "));
	448	fix->id[sizeof(fix->id) - 1] = '\0';
	449
	450	var->xres = var->xres_virtual = width;
	451	var->yres = var->yres_virtual = height;
	452	fix->line_length = pitch;
	453
	454	fix->smem_start = address;
	455	fix->smem_len = pitch * height;
	456	fix->type = FB_TYPE_PACKED_PIXELS;
	457	fix->type_aux = 0;
	458
	459	par->cmap_type = cmap_unknown;
460	if (depth == 8) {
461	/* XXX kludge for ati */
462	if (dp && !strncmp(name, "ATY,Rage128", 11)) {
463	unsigned long regbase = dp->addrs[2].address;
464	par->cmap_adr = ioremap(regbase, 0x1FFF);
465	par->cmap_type = cmap_r128;
466	} else if (dp && (!strncmp(name, "ATY,RageM3pA", 12)
467	\|\| !strncmp(name, "ATY,RageM3p12A", 14))) {
468	unsigned long regbase =
469	dp->parent->addrs[2].address;
470	par->cmap_adr = ioremap(regbase, 0x1FFF);
471	par->cmap_type = cmap_M3A;
472	} else if (dp && !strncmp(name, "ATY,RageM3pB", 12)) {
473	unsigned long regbase =
474	dp->parent->addrs[2].address;
475	par->cmap_adr = ioremap(regbase, 0x1FFF);
476	par->cmap_type = cmap_M3B;
477	} else if (dp && !strncmp(name, "ATY,Rage6", 9)) {
478	unsigned long regbase = dp->addrs[1].address;
479	par->cmap_adr = ioremap(regbase, 0x1FFF);
480	par->cmap_type = cmap_radeon;
481	} else if (!strncmp(name, "ATY,", 4)) {
482	unsigned long base = address & 0xff000000UL;
483	par->cmap_adr =
484	ioremap(base + 0x7ff000, 0x1000) + 0xcc0;
485	par->cmap_data = par->cmap_adr + 1;
486	par->cmap_type = cmap_m64;
487	} else if (device_is_compatible(dp, "pci1014,b7")) {
488	unsigned long regbase = dp->addrs[0].address;
489	par->cmap_adr = ioremap(regbase + 0x6000, 0x1000);
490	par->cmap_type = cmap_gxt2000;
491	}
492	fix->visual = par->cmap_adr ? FB_VISUAL_PSEUDOCOLOR
493	: FB_VISUAL_STATIC_PSEUDOCOLOR;
494	} else
495	fix->visual = /* par->cmap_adr ? FB_VISUAL_DIRECTCOLOR
496	: */ FB_VISUAL_TRUECOLOR;
497
498	var->xoffset = var->yoffset = 0;
499	var->bits_per_pixel = depth;
500	switch (depth) {
501	case 8:
502	var->bits_per_pixel = 8;
503	var->red.offset = 0;
504	var->red.length = 8;
505	var->green.offset = 0;
506	var->green.length = 8;
507	var->blue.offset = 0;
508	var->blue.length = 8;
509	var->transp.offset = 0;
510	var->transp.length = 0;
511	break;
512	case 16: /* RGB 555 */
513	var->bits_per_pixel = 16;
514	var->red.offset = 10;
515	var->red.length = 5;
516	var->green.offset = 5;
517	var->green.length = 5;
518	var->blue.offset = 0;
519	var->blue.length = 5;
520	var->transp.offset = 0;
521	var->transp.length = 0;
522	break;
523	case 32: /* RGB 888 */
524	var->bits_per_pixel = 32;
525	var->red.offset = 16;
526	var->red.length = 8;
527	var->green.offset = 8;
528	var->green.length = 8;
529	var->blue.offset = 0;
530	var->blue.length = 8;
531	var->transp.offset = 24;
532	var->transp.length = 8;
533	break;
534	}
535	var->red.msb_right = var->green.msb_right = var->blue.msb_right =
536	var->transp.msb_right = 0;
537	var->grayscale = 0;
538	var->nonstd = 0;
539	var->activate = 0;
540	var->height = var->width = -1;
541	var->pixclock = 10000;
542	var->left_margin = var->right_margin = 16;
543	var->upper_margin = var->lower_margin = 16;
544	var->hsync_len = var->vsync_len = 8;
545	var->sync = 0;
546	var->vmode = FB_VMODE_NONINTERLACED;
547
548	info->fbops = &offb_ops;
549	info->screen_base = ioremap(address, fix->smem_len);
550	info->par = par;
551	info->pseudo_palette = (void *) (info + 1);
552	info->flags = FBINFO_DEFAULT;
553
554	fb_alloc_cmap(&info->cmap, 256, 0);
555
556	if (register_framebuffer(info) < 0) {
557	kfree(info);
558	release_mem_region(res_start, res_size);
559	return;
560	}
561
562	printk(KERN_INFO "fb%d: Open Firmware frame buffer device on %s\n",
563	info->node, full_name);
564	}
565
566	module_init(offb_init);
567	MODULE_LICENSE("GPL");