From 2995e506276bfdc7311eb02db8b2aa1a61a4b849 Mon Sep 17 00:00:00 2001
From: David Herrmann <dh.herrmann@gmail.com>
Date: Fri, 2 Aug 2013 14:05:23 +0200
Subject: x86: sysfb: move EFI quirks from efifb to sysfb

The EFI FB quirks from efifb.c are useful for simple-framebuffer devices
as well. Apply them by default so we can convert efifb.c to use
efi-framebuffer platform devices.

Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
Link: http://lkml.kernel.org/r/1375445127-15480-5-git-send-email-dh.herrmann@gmail.com
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
---
 arch/x86/kernel/sysfb_efi.c | 214 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 214 insertions(+)
 create mode 100644 arch/x86/kernel/sysfb_efi.c

(limited to 'arch/x86/kernel/sysfb_efi.c')

diff --git a/arch/x86/kernel/sysfb_efi.c b/arch/x86/kernel/sysfb_efi.c
new file mode 100644
index 00000000000..b285d4e8c68
--- /dev/null
+++ b/arch/x86/kernel/sysfb_efi.c
@@ -0,0 +1,214 @@
+/*
+ * Generic System Framebuffers on x86
+ * Copyright (c) 2012-2013 David Herrmann <dh.herrmann@gmail.com>
+ *
+ * EFI Quirks Copyright (c) 2006 Edgar Hucek <gimli@dark-green.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ */
+
+/*
+ * EFI Quirks
+ * Several EFI systems do not correctly advertise their boot framebuffers.
+ * Hence, we use this static table of known broken machines and fix up the
+ * information so framebuffer drivers can load corectly.
+ */
+
+#include <linux/dmi.h>
+#include <linux/err.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/pci.h>
+#include <linux/screen_info.h>
+#include <video/vga.h>
+#include <asm/sysfb.h>
+
+enum {
+	OVERRIDE_NONE = 0x0,
+	OVERRIDE_BASE = 0x1,
+	OVERRIDE_STRIDE = 0x2,
+	OVERRIDE_HEIGHT = 0x4,
+	OVERRIDE_WIDTH = 0x8,
+};
+
+struct efifb_dmi_info efifb_dmi_list[] = {
+	[M_I17] = { "i17", 0x80010000, 1472 * 4, 1440, 900, OVERRIDE_NONE },
+	[M_I20] = { "i20", 0x80010000, 1728 * 4, 1680, 1050, OVERRIDE_NONE }, /* guess */
+	[M_I20_SR] = { "imac7", 0x40010000, 1728 * 4, 1680, 1050, OVERRIDE_NONE },
+	[M_I24] = { "i24", 0x80010000, 2048 * 4, 1920, 1200, OVERRIDE_NONE }, /* guess */
+	[M_I24_8_1] = { "imac8", 0xc0060000, 2048 * 4, 1920, 1200, OVERRIDE_NONE },
+	[M_I24_10_1] = { "imac10", 0xc0010000, 2048 * 4, 1920, 1080, OVERRIDE_NONE },
+	[M_I27_11_1] = { "imac11", 0xc0010000, 2560 * 4, 2560, 1440, OVERRIDE_NONE },
+	[M_MINI]= { "mini", 0x80000000, 2048 * 4, 1024, 768, OVERRIDE_NONE },
+	[M_MINI_3_1] = { "mini31", 0x40010000, 1024 * 4, 1024, 768, OVERRIDE_NONE },
+	[M_MINI_4_1] = { "mini41", 0xc0010000, 2048 * 4, 1920, 1200, OVERRIDE_NONE },
+	[M_MB] = { "macbook", 0x80000000, 2048 * 4, 1280, 800, OVERRIDE_NONE },
+	[M_MB_5_1] = { "macbook51", 0x80010000, 2048 * 4, 1280, 800, OVERRIDE_NONE },
+	[M_MB_6_1] = { "macbook61", 0x80010000, 2048 * 4, 1280, 800, OVERRIDE_NONE },
+	[M_MB_7_1] = { "macbook71", 0x80010000, 2048 * 4, 1280, 800, OVERRIDE_NONE },
+	[M_MBA] = { "mba", 0x80000000, 2048 * 4, 1280, 800, OVERRIDE_NONE },
+	/* 11" Macbook Air 3,1 passes the wrong stride */
+	[M_MBA_3] = { "mba3", 0, 2048 * 4, 0, 0, OVERRIDE_STRIDE },
+	[M_MBP] = { "mbp", 0x80010000, 1472 * 4, 1440, 900, OVERRIDE_NONE },
+	[M_MBP_2] = { "mbp2", 0, 0, 0, 0, OVERRIDE_NONE }, /* placeholder */
+	[M_MBP_2_2] = { "mbp22", 0x80010000, 1472 * 4, 1440, 900, OVERRIDE_NONE },
+	[M_MBP_SR] = { "mbp3", 0x80030000, 2048 * 4, 1440, 900, OVERRIDE_NONE },
+	[M_MBP_4] = { "mbp4", 0xc0060000, 2048 * 4, 1920, 1200, OVERRIDE_NONE },
+	[M_MBP_5_1] = { "mbp51", 0xc0010000, 2048 * 4, 1440, 900, OVERRIDE_NONE },
+	[M_MBP_5_2] = { "mbp52", 0xc0010000, 2048 * 4, 1920, 1200, OVERRIDE_NONE },
+	[M_MBP_5_3] = { "mbp53", 0xd0010000, 2048 * 4, 1440, 900, OVERRIDE_NONE },
+	[M_MBP_6_1] = { "mbp61", 0x90030000, 2048 * 4, 1920, 1200, OVERRIDE_NONE },
+	[M_MBP_6_2] = { "mbp62", 0x90030000, 2048 * 4, 1680, 1050, OVERRIDE_NONE },
+	[M_MBP_7_1] = { "mbp71", 0xc0010000, 2048 * 4, 1280, 800, OVERRIDE_NONE },
+	[M_MBP_8_2] = { "mbp82", 0x90010000, 1472 * 4, 1440, 900, OVERRIDE_NONE },
+	[M_UNKNOWN] = { NULL, 0, 0, 0, 0, OVERRIDE_NONE }
+};
+
+#define choose_value(dmivalue, fwvalue, field, flags) ({	\
+		typeof(fwvalue) _ret_ = fwvalue;		\
+		if ((flags) & (field))				\
+			_ret_ = dmivalue;			\
+		else if ((fwvalue) == 0)			\
+			_ret_ = dmivalue;			\
+		_ret_;						\
+	})
+
+static int __init efifb_set_system(const struct dmi_system_id *id)
+{
+	struct efifb_dmi_info *info = id->driver_data;
+
+	if (info->base == 0 && info->height == 0 && info->width == 0 &&
+	    info->stride == 0)
+		return 0;
+
+	/* Trust the bootloader over the DMI tables */
+	if (screen_info.lfb_base == 0) {
+#if defined(CONFIG_PCI)
+		struct pci_dev *dev = NULL;
+		int found_bar = 0;
+#endif
+		if (info->base) {
+			screen_info.lfb_base = choose_value(info->base,
+				screen_info.lfb_base, OVERRIDE_BASE,
+				info->flags);
+
+#if defined(CONFIG_PCI)
+			/* make sure that the address in the table is actually
+			 * on a VGA device's PCI BAR */
+
+			for_each_pci_dev(dev) {
+				int i;
+				if ((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA)
+					continue;
+				for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
+					resource_size_t start, end;
+
+					start = pci_resource_start(dev, i);
+					if (start == 0)
+						break;
+					end = pci_resource_end(dev, i);
+					if (screen_info.lfb_base >= start &&
+					    screen_info.lfb_base < end) {
+						found_bar = 1;
+					}
+				}
+			}
+			if (!found_bar)
+				screen_info.lfb_base = 0;
+#endif
+		}
+	}
+	if (screen_info.lfb_base) {
+		screen_info.lfb_linelength = choose_value(info->stride,
+			screen_info.lfb_linelength, OVERRIDE_STRIDE,
+			info->flags);
+		screen_info.lfb_width = choose_value(info->width,
+			screen_info.lfb_width, OVERRIDE_WIDTH,
+			info->flags);
+		screen_info.lfb_height = choose_value(info->height,
+			screen_info.lfb_height, OVERRIDE_HEIGHT,
+			info->flags);
+		if (screen_info.orig_video_isVGA == 0)
+			screen_info.orig_video_isVGA = VIDEO_TYPE_EFI;
+	} else {
+		screen_info.lfb_linelength = 0;
+		screen_info.lfb_width = 0;
+		screen_info.lfb_height = 0;
+		screen_info.orig_video_isVGA = 0;
+		return 0;
+	}
+
+	printk(KERN_INFO "efifb: dmi detected %s - framebuffer at 0x%08x "
+			 "(%dx%d, stride %d)\n", id->ident,
+			 screen_info.lfb_base, screen_info.lfb_width,
+			 screen_info.lfb_height, screen_info.lfb_linelength);
+
+	return 1;
+}
+
+#define EFIFB_DMI_SYSTEM_ID(vendor, name, enumid)		\
+	{							\
+		efifb_set_system,				\
+		name,						\
+		{						\
+			DMI_MATCH(DMI_BIOS_VENDOR, vendor),	\
+			DMI_MATCH(DMI_PRODUCT_NAME, name)	\
+		},						\
+		&efifb_dmi_list[enumid]				\
+	}
+
+static const struct dmi_system_id efifb_dmi_system_table[] __initconst = {
+	EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "iMac4,1", M_I17),
+	/* At least one of these two will be right; maybe both? */
+	EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "iMac5,1", M_I20),
+	EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac5,1", M_I20),
+	/* At least one of these two will be right; maybe both? */
+	EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "iMac6,1", M_I24),
+	EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac6,1", M_I24),
+	EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac7,1", M_I20_SR),
+	EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac8,1", M_I24_8_1),
+	EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac10,1", M_I24_10_1),
+	EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac11,1", M_I27_11_1),
+	EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "Macmini1,1", M_MINI),
+	EFIFB_DMI_SYSTEM_ID("Apple Inc.", "Macmini3,1", M_MINI_3_1),
+	EFIFB_DMI_SYSTEM_ID("Apple Inc.", "Macmini4,1", M_MINI_4_1),
+	EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBook1,1", M_MB),
+	/* At least one of these two will be right; maybe both? */
+	EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBook2,1", M_MB),
+	EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook2,1", M_MB),
+	/* At least one of these two will be right; maybe both? */
+	EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBook3,1", M_MB),
+	EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook3,1", M_MB),
+	EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook4,1", M_MB),
+	EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook5,1", M_MB_5_1),
+	EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook6,1", M_MB_6_1),
+	EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook7,1", M_MB_7_1),
+	EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookAir1,1", M_MBA),
+	EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookAir3,1", M_MBA_3),
+	EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBookPro1,1", M_MBP),
+	EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBookPro2,1", M_MBP_2),
+	EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBookPro2,2", M_MBP_2_2),
+	EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro2,1", M_MBP_2),
+	EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBookPro3,1", M_MBP_SR),
+	EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro3,1", M_MBP_SR),
+	EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro4,1", M_MBP_4),
+	EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro5,1", M_MBP_5_1),
+	EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro5,2", M_MBP_5_2),
+	EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro5,3", M_MBP_5_3),
+	EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro6,1", M_MBP_6_1),
+	EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro6,2", M_MBP_6_2),
+	EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro7,1", M_MBP_7_1),
+	EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro8,2", M_MBP_8_2),
+	{},
+};
+
+__init void sysfb_apply_efi_quirks(void)
+{
+	if (screen_info.orig_video_isVGA != VIDEO_TYPE_EFI ||
+	    !(screen_info.capabilities & VIDEO_CAPABILITY_SKIP_QUIRKS))
+		dmi_check_system(efifb_dmi_system_table);
+}
-- 
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