From 973f5607fd36054bf6e1bfe2e4895c841e288937 Mon Sep 17 00:00:00 2001
From: "Huang, Ying" <ying.huang@intel.com>
Date: Wed, 28 Nov 2007 16:21:55 -0800
Subject: [PATCH] --- yaml --- r: 74375 b: refs/heads/master c:
 7c83172b98e569d9aabf947d8b3b089dadb2ff46 h: refs/heads/master i:   74373:
 1283a5109f9da2e6bb151d6363f77b2fa7933394   74371:
 6fcd82ab0d9d2164a867d0a27a5d5131452d749f   74367:
 d85c5fd8c5fde44f7a6e7bb5330f8d23fc4e3127 v: v3

---
 [refs]                            |   2 +-
 trunk/drivers/video/Kconfig       |  11 ++
 trunk/drivers/video/Makefile      |   1 +
 trunk/drivers/video/efifb.c       | 232 ++++++++++++++++++++++++++++++
 trunk/include/linux/screen_info.h |   2 +
 5 files changed, 247 insertions(+), 1 deletion(-)
 create mode 100644 trunk/drivers/video/efifb.c

diff --git a/[refs] b/[refs]
index 78cca0c4d439..493cfcb8b865 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: f78ba15705a5ef36b55c4e3142724e2211cb1733
+refs/heads/master: 7c83172b98e569d9aabf947d8b3b089dadb2ff46
diff --git a/trunk/drivers/video/Kconfig b/trunk/drivers/video/Kconfig
index 7d86e9eae915..5b3dbcfcda48 100644
--- a/trunk/drivers/video/Kconfig
+++ b/trunk/drivers/video/Kconfig
@@ -641,6 +641,17 @@ config FB_VESA
 	  You will get a boot time penguin logo at no additional cost. Please
 	  read <file:Documentation/fb/vesafb.txt>. If unsure, say Y.
 
+config FB_EFI
+	bool "EFI-based Framebuffer Support"
+	depends on (FB = y) && X86
+	select FB_CFB_FILLRECT
+	select FB_CFB_COPYAREA
+	select FB_CFB_IMAGEBLIT
+	help
+	  This is the EFI frame buffer device driver. If the firmware on
+	  your platform is UEFI2.0, select Y to add support for
+	  Graphics Output Protocol for early console messages to appear.
+
 config FB_IMAC
 	bool "Intel-based Macintosh Framebuffer Support"
 	depends on (FB = y) && X86 && EFI
diff --git a/trunk/drivers/video/Makefile b/trunk/drivers/video/Makefile
index 59d6c45a910d..83e02b3429b6 100644
--- a/trunk/drivers/video/Makefile
+++ b/trunk/drivers/video/Makefile
@@ -118,6 +118,7 @@ obj-$(CONFIG_FB_OMAP)             += omap/
 obj-$(CONFIG_FB_UVESA)            += uvesafb.o
 obj-$(CONFIG_FB_VESA)             += vesafb.o
 obj-$(CONFIG_FB_IMAC)             += imacfb.o
+obj-$(CONFIG_FB_EFI)              += efifb.o
 obj-$(CONFIG_FB_VGA16)            += vga16fb.o
 obj-$(CONFIG_FB_OF)               += offb.o
 obj-$(CONFIG_FB_BF54X_LQ043)	  += bf54x-lq043fb.o
diff --git a/trunk/drivers/video/efifb.c b/trunk/drivers/video/efifb.c
new file mode 100644
index 000000000000..bd779ae44b1e
--- /dev/null
+++ b/trunk/drivers/video/efifb.c
@@ -0,0 +1,232 @@
+/*
+ * Framebuffer driver for EFI/UEFI based system
+ *
+ * (c) 2006 Edgar Hucek <gimli@dark-green.com>
+ * Original efi driver written by Gerd Knorr <kraxel@goldbach.in-berlin.de>
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/fb.h>
+#include <linux/platform_device.h>
+#include <linux/screen_info.h>
+
+#include <video/vga.h>
+
+static struct fb_var_screeninfo efifb_defined __initdata = {
+	.activate		= FB_ACTIVATE_NOW,
+	.height			= -1,
+	.width			= -1,
+	.right_margin		= 32,
+	.upper_margin		= 16,
+	.lower_margin		= 4,
+	.vsync_len		= 4,
+	.vmode			= FB_VMODE_NONINTERLACED,
+};
+
+static struct fb_fix_screeninfo efifb_fix __initdata = {
+	.id			= "EFI VGA",
+	.type			= FB_TYPE_PACKED_PIXELS,
+	.accel			= FB_ACCEL_NONE,
+	.visual			= FB_VISUAL_TRUECOLOR,
+};
+
+static int efifb_setcolreg(unsigned regno, unsigned red, unsigned green,
+			   unsigned blue, unsigned transp,
+			   struct fb_info *info)
+{
+	/*
+	 *  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.
+	 */
+
+	if (regno >= info->cmap.len)
+		return 1;
+
+	if (regno < 16) {
+		red   >>= 8;
+		green >>= 8;
+		blue  >>= 8;
+		((u32 *)(info->pseudo_palette))[regno] =
+			(red   << info->var.red.offset)   |
+			(green << info->var.green.offset) |
+			(blue  << info->var.blue.offset);
+	}
+	return 0;
+}
+
+static struct fb_ops efifb_ops = {
+	.owner		= THIS_MODULE,
+	.fb_setcolreg	= efifb_setcolreg,
+	.fb_fillrect	= cfb_fillrect,
+	.fb_copyarea	= cfb_copyarea,
+	.fb_imageblit	= cfb_imageblit,
+};
+
+static int __init efifb_probe(struct platform_device *dev)
+{
+	struct fb_info *info;
+	int err;
+	unsigned int size_vmode;
+	unsigned int size_remap;
+	unsigned int size_total;
+
+	efifb_fix.smem_start = screen_info.lfb_base;
+	efifb_defined.bits_per_pixel = screen_info.lfb_depth;
+	efifb_defined.xres = screen_info.lfb_width;
+	efifb_defined.yres = screen_info.lfb_height;
+	efifb_fix.line_length = screen_info.lfb_linelength;
+
+	/*   size_vmode -- that is the amount of memory needed for the
+	 *                 used video mode, i.e. the minimum amount of
+	 *                 memory we need. */
+	size_vmode = efifb_defined.yres * efifb_fix.line_length;
+
+	/*   size_total -- all video memory we have. Used for
+	 *                 entries, ressource allocation and bounds
+	 *                 checking. */
+	size_total = screen_info.lfb_size;
+	if (size_total < size_vmode)
+		size_total = size_vmode;
+
+	/*   size_remap -- the amount of video memory we are going to
+	 *                 use for efifb.  With modern cards it is no
+	 *                 option to simply use size_total as that
+	 *                 wastes plenty of kernel address space. */
+	size_remap  = size_vmode * 2;
+	if (size_remap < size_vmode)
+		size_remap = size_vmode;
+	if (size_remap > size_total)
+		size_remap = size_total;
+	efifb_fix.smem_len = size_remap;
+
+	if (!request_mem_region(efifb_fix.smem_start, size_total, "efifb"))
+		/* We cannot make this fatal. Sometimes this comes from magic
+		   spaces our resource handlers simply don't know about */
+		printk(KERN_WARNING
+		       "efifb: cannot reserve video memory at 0x%lx\n",
+			efifb_fix.smem_start);
+
+	info = framebuffer_alloc(sizeof(u32) * 16, &dev->dev);
+	if (!info) {
+		err = -ENOMEM;
+		goto err_release_mem;
+	}
+	info->pseudo_palette = info->par;
+	info->par = NULL;
+
+	info->screen_base = ioremap(efifb_fix.smem_start, efifb_fix.smem_len);
+	if (!info->screen_base) {
+		printk(KERN_ERR "efifb: abort, cannot ioremap video memory "
+				"0x%x @ 0x%lx\n",
+			efifb_fix.smem_len, efifb_fix.smem_start);
+		err = -EIO;
+		goto err_unmap;
+	}
+
+	printk(KERN_INFO "efifb: framebuffer at 0x%lx, mapped to 0x%p, "
+	       "using %dk, total %dk\n",
+	       efifb_fix.smem_start, info->screen_base,
+	       size_remap/1024, size_total/1024);
+	printk(KERN_INFO "efifb: mode is %dx%dx%d, linelength=%d, pages=%d\n",
+	       efifb_defined.xres, efifb_defined.yres,
+	       efifb_defined.bits_per_pixel, efifb_fix.line_length,
+	       screen_info.pages);
+
+	efifb_defined.xres_virtual = efifb_defined.xres;
+	efifb_defined.yres_virtual = efifb_fix.smem_len /
+					efifb_fix.line_length;
+	printk(KERN_INFO "efifb: scrolling: redraw\n");
+	efifb_defined.yres_virtual = efifb_defined.yres;
+
+	/* some dummy values for timing to make fbset happy */
+	efifb_defined.pixclock     = 10000000 / efifb_defined.xres *
+					1000 / efifb_defined.yres;
+	efifb_defined.left_margin  = (efifb_defined.xres / 8) & 0xf8;
+	efifb_defined.hsync_len    = (efifb_defined.xres / 8) & 0xf8;
+
+	efifb_defined.red.offset    = screen_info.red_pos;
+	efifb_defined.red.length    = screen_info.red_size;
+	efifb_defined.green.offset  = screen_info.green_pos;
+	efifb_defined.green.length  = screen_info.green_size;
+	efifb_defined.blue.offset   = screen_info.blue_pos;
+	efifb_defined.blue.length   = screen_info.blue_size;
+	efifb_defined.transp.offset = screen_info.rsvd_pos;
+	efifb_defined.transp.length = screen_info.rsvd_size;
+
+	printk(KERN_INFO "efifb: %s: "
+	       "size=%d:%d:%d:%d, shift=%d:%d:%d:%d\n",
+	       "Truecolor",
+	       screen_info.rsvd_size,
+	       screen_info.red_size,
+	       screen_info.green_size,
+	       screen_info.blue_size,
+	       screen_info.rsvd_pos,
+	       screen_info.red_pos,
+	       screen_info.green_pos,
+	       screen_info.blue_pos);
+
+	efifb_fix.ypanstep  = 0;
+	efifb_fix.ywrapstep = 0;
+
+	info->fbops = &efifb_ops;
+	info->var = efifb_defined;
+	info->fix = efifb_fix;
+	info->flags = FBINFO_FLAG_DEFAULT;
+
+	if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) {
+		err = -ENOMEM;
+		goto err_unmap;
+	}
+	if (register_framebuffer(info) < 0) {
+		err = -EINVAL;
+		goto err_fb_dealoc;
+	}
+	printk(KERN_INFO "fb%d: %s frame buffer device\n",
+	       info->node, info->fix.id);
+	return 0;
+
+err_fb_dealoc:
+	fb_dealloc_cmap(&info->cmap);
+err_unmap:
+	iounmap(info->screen_base);
+	framebuffer_release(info);
+err_release_mem:
+	release_mem_region(efifb_fix.smem_start, size_total);
+	return err;
+}
+
+static struct platform_driver efifb_driver = {
+	.probe	= efifb_probe,
+	.driver	= {
+		.name	= "efifb",
+	},
+};
+
+static struct platform_device efifb_device = {
+	.name	= "efifb",
+};
+
+static int __init efifb_init(void)
+{
+	int ret;
+
+	if (screen_info.orig_video_isVGA != VIDEO_TYPE_EFI)
+		return -ENODEV;
+
+	ret = platform_driver_register(&efifb_driver);
+
+	if (!ret) {
+		ret = platform_device_register(&efifb_device);
+		if (ret)
+			platform_driver_unregister(&efifb_driver);
+	}
+	return ret;
+}
+module_init(efifb_init);
+
+MODULE_LICENSE("GPL");
diff --git a/trunk/include/linux/screen_info.h b/trunk/include/linux/screen_info.h
index 827b85bbf388..1ee2c05142f6 100644
--- a/trunk/include/linux/screen_info.h
+++ b/trunk/include/linux/screen_info.h
@@ -63,6 +63,8 @@ struct screen_info {
 
 #define VIDEO_TYPE_PMAC		0x60	/* PowerMacintosh frame buffer. */
 
+#define VIDEO_TYPE_EFI		0x70	/* EFI graphic mode		*/
+
 #ifdef __KERNEL__
 extern struct screen_info screen_info;