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