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Diffstat (limited to 'arch/x86/kernel/sysfb_efi.c')
-rw-r--r--arch/x86/kernel/sysfb_efi.c214
1 files changed, 214 insertions, 0 deletions
diff --git a/arch/x86/kernel/sysfb_efi.c b/arch/x86/kernel/sysfb_efi.c
new file mode 100644
index 000000000000..b285d4e8c68e
--- /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);
+}
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-13 05:36:25 +0300