Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 538 insertions, 0 deletions

diff --git a/drivers/video/offb.c b/drivers/video/offb.c
new file mode 100644
index 000000000000..42a6591e863f
--- /dev/null
+++ b/drivers/video/offb.c
@@ -0,0 +1,538 @@
+/*
+ *  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,
+	.fb_cursor	= soft_cursor,
+};
+
+    /*
+     *  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 *up;
+	unsigned long address;
+
+	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;
+	if ((up = (unsigned *) get_property(dp, "address", &len)) != NULL
+	    && len == sizeof(unsigned))
+		address = (u_long) * up;
+	else {
+		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 += dp->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");