1/* 2 * Generic System Framebuffers on x86 3 * Copyright (c) 2012-2013 David Herrmann <dh.herrmann@gmail.com> 4 * 5 * EFI Quirks Copyright (c) 2006 Edgar Hucek <gimli@dark-green.com> 6 * 7 * This program is free software; you can redistribute it and/or modify it 8 * under the terms of the GNU General Public License as published by the Free 9 * Software Foundation; either version 2 of the License, or (at your option) 10 * any later version. 11 */ 12 13/* 14 * EFI Quirks 15 * Several EFI systems do not correctly advertise their boot framebuffers. 16 * Hence, we use this static table of known broken machines and fix up the 17 * information so framebuffer drivers can load corectly. 18 */ 19 20#include <linux/dmi.h> 21#include <linux/err.h> 22#include <linux/init.h> 23#include <linux/kernel.h> 24#include <linux/mm.h> 25#include <linux/pci.h> 26#include <linux/screen_info.h> 27#include <video/vga.h> 28#include <asm/sysfb.h> 29 30enum { 31 OVERRIDE_NONE = 0x0, 32 OVERRIDE_BASE = 0x1, 33 OVERRIDE_STRIDE = 0x2, 34 OVERRIDE_HEIGHT = 0x4, 35 OVERRIDE_WIDTH = 0x8, 36}; 37 38struct efifb_dmi_info efifb_dmi_list[] = { 39 [M_I17] = { "i17", 0x80010000, 1472 * 4, 1440, 900, OVERRIDE_NONE }, 40 [M_I20] = { "i20", 0x80010000, 1728 * 4, 1680, 1050, OVERRIDE_NONE }, /* guess */ 41 [M_I20_SR] = { "imac7", 0x40010000, 1728 * 4, 1680, 1050, OVERRIDE_NONE }, 42 [M_I24] = { "i24", 0x80010000, 2048 * 4, 1920, 1200, OVERRIDE_NONE }, /* guess */ 43 [M_I24_8_1] = { "imac8", 0xc0060000, 2048 * 4, 1920, 1200, OVERRIDE_NONE }, 44 [M_I24_10_1] = { "imac10", 0xc0010000, 2048 * 4, 1920, 1080, OVERRIDE_NONE }, 45 [M_I27_11_1] = { "imac11", 0xc0010000, 2560 * 4, 2560, 1440, OVERRIDE_NONE }, 46 [M_MINI]= { "mini", 0x80000000, 2048 * 4, 1024, 768, OVERRIDE_NONE }, 47 [M_MINI_3_1] = { "mini31", 0x40010000, 1024 * 4, 1024, 768, OVERRIDE_NONE }, 48 [M_MINI_4_1] = { "mini41", 0xc0010000, 2048 * 4, 1920, 1200, OVERRIDE_NONE }, 49 [M_MB] = { "macbook", 0x80000000, 2048 * 4, 1280, 800, OVERRIDE_NONE }, 50 [M_MB_5_1] = { "macbook51", 0x80010000, 2048 * 4, 1280, 800, OVERRIDE_NONE }, 51 [M_MB_6_1] = { "macbook61", 0x80010000, 2048 * 4, 1280, 800, OVERRIDE_NONE }, 52 [M_MB_7_1] = { "macbook71", 0x80010000, 2048 * 4, 1280, 800, OVERRIDE_NONE }, 53 [M_MBA] = { "mba", 0x80000000, 2048 * 4, 1280, 800, OVERRIDE_NONE }, 54 /* 11" Macbook Air 3,1 passes the wrong stride */ 55 [M_MBA_3] = { "mba3", 0, 2048 * 4, 0, 0, OVERRIDE_STRIDE }, 56 [M_MBP] = { "mbp", 0x80010000, 1472 * 4, 1440, 900, OVERRIDE_NONE }, 57 [M_MBP_2] = { "mbp2", 0, 0, 0, 0, OVERRIDE_NONE }, /* placeholder */ 58 [M_MBP_2_2] = { "mbp22", 0x80010000, 1472 * 4, 1440, 900, OVERRIDE_NONE }, 59 [M_MBP_SR] = { "mbp3", 0x80030000, 2048 * 4, 1440, 900, OVERRIDE_NONE }, 60 [M_MBP_4] = { "mbp4", 0xc0060000, 2048 * 4, 1920, 1200, OVERRIDE_NONE }, 61 [M_MBP_5_1] = { "mbp51", 0xc0010000, 2048 * 4, 1440, 900, OVERRIDE_NONE }, 62 [M_MBP_5_2] = { "mbp52", 0xc0010000, 2048 * 4, 1920, 1200, OVERRIDE_NONE }, 63 [M_MBP_5_3] = { "mbp53", 0xd0010000, 2048 * 4, 1440, 900, OVERRIDE_NONE }, 64 [M_MBP_6_1] = { "mbp61", 0x90030000, 2048 * 4, 1920, 1200, OVERRIDE_NONE }, 65 [M_MBP_6_2] = { "mbp62", 0x90030000, 2048 * 4, 1680, 1050, OVERRIDE_NONE }, 66 [M_MBP_7_1] = { "mbp71", 0xc0010000, 2048 * 4, 1280, 800, OVERRIDE_NONE }, 67 [M_MBP_8_2] = { "mbp82", 0x90010000, 1472 * 4, 1440, 900, OVERRIDE_NONE }, 68 [M_UNKNOWN] = { NULL, 0, 0, 0, 0, OVERRIDE_NONE } 69}; 70 71#define choose_value(dmivalue, fwvalue, field, flags) ({ \ 72 typeof(fwvalue) _ret_ = fwvalue; \ 73 if ((flags) & (field)) \ 74 _ret_ = dmivalue; \ 75 else if ((fwvalue) == 0) \ 76 _ret_ = dmivalue; \ 77 _ret_; \ 78 }) 79 80static int __init efifb_set_system(const struct dmi_system_id *id) 81{ 82 struct efifb_dmi_info *info = id->driver_data; 83 84 if (info->base == 0 && info->height == 0 && info->width == 0 && 85 info->stride == 0) 86 return 0; 87 88 /* Trust the bootloader over the DMI tables */ 89 if (screen_info.lfb_base == 0) { 90#if defined(CONFIG_PCI) 91 struct pci_dev *dev = NULL; 92 int found_bar = 0; 93#endif 94 if (info->base) { 95 screen_info.lfb_base = choose_value(info->base, 96 screen_info.lfb_base, OVERRIDE_BASE, 97 info->flags); 98 99#if defined(CONFIG_PCI) 100 /* make sure that the address in the table is actually 101 * on a VGA device's PCI BAR */ 102 103 for_each_pci_dev(dev) { 104 int i; 105 if ((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA) 106 continue; 107 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) { 108 resource_size_t start, end; 109 110 start = pci_resource_start(dev, i); 111 if (start == 0) 112 break; 113 end = pci_resource_end(dev, i); 114 if (screen_info.lfb_base >= start && 115 screen_info.lfb_base < end) { 116 found_bar = 1; 117 } 118 } 119 } 120 if (!found_bar) 121 screen_info.lfb_base = 0; 122#endif 123 } 124 } 125 if (screen_info.lfb_base) { 126 screen_info.lfb_linelength = choose_value(info->stride, 127 screen_info.lfb_linelength, OVERRIDE_STRIDE, 128 info->flags); 129 screen_info.lfb_width = choose_value(info->width, 130 screen_info.lfb_width, OVERRIDE_WIDTH, 131 info->flags); 132 screen_info.lfb_height = choose_value(info->height, 133 screen_info.lfb_height, OVERRIDE_HEIGHT, 134 info->flags); 135 if (screen_info.orig_video_isVGA == 0) 136 screen_info.orig_video_isVGA = VIDEO_TYPE_EFI; 137 } else { 138 screen_info.lfb_linelength = 0; 139 screen_info.lfb_width = 0; 140 screen_info.lfb_height = 0; 141 screen_info.orig_video_isVGA = 0; 142 return 0; 143 } 144 145 printk(KERN_INFO "efifb: dmi detected %s - framebuffer at 0x%08x " 146 "(%dx%d, stride %d)\n", id->ident, 147 screen_info.lfb_base, screen_info.lfb_width, 148 screen_info.lfb_height, screen_info.lfb_linelength); 149 150 return 1; 151} 152 153#define EFIFB_DMI_SYSTEM_ID(vendor, name, enumid) \ 154 { \ 155 efifb_set_system, \ 156 name, \ 157 { \ 158 DMI_MATCH(DMI_BIOS_VENDOR, vendor), \ 159 DMI_MATCH(DMI_PRODUCT_NAME, name) \ 160 }, \ 161 &efifb_dmi_list[enumid] \ 162 } 163 164static const struct dmi_system_id efifb_dmi_system_table[] __initconst = { 165 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "iMac4,1", M_I17), 166 /* At least one of these two will be right; maybe both? */ 167 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "iMac5,1", M_I20), 168 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac5,1", M_I20), 169 /* At least one of these two will be right; maybe both? */ 170 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "iMac6,1", M_I24), 171 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac6,1", M_I24), 172 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac7,1", M_I20_SR), 173 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac8,1", M_I24_8_1), 174 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac10,1", M_I24_10_1), 175 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac11,1", M_I27_11_1), 176 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "Macmini1,1", M_MINI), 177 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "Macmini3,1", M_MINI_3_1), 178 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "Macmini4,1", M_MINI_4_1), 179 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBook1,1", M_MB), 180 /* At least one of these two will be right; maybe both? */ 181 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBook2,1", M_MB), 182 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook2,1", M_MB), 183 /* At least one of these two will be right; maybe both? */ 184 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBook3,1", M_MB), 185 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook3,1", M_MB), 186 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook4,1", M_MB), 187 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook5,1", M_MB_5_1), 188 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook6,1", M_MB_6_1), 189 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook7,1", M_MB_7_1), 190 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookAir1,1", M_MBA), 191 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookAir3,1", M_MBA_3), 192 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBookPro1,1", M_MBP), 193 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBookPro2,1", M_MBP_2), 194 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBookPro2,2", M_MBP_2_2), 195 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro2,1", M_MBP_2), 196 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBookPro3,1", M_MBP_SR), 197 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro3,1", M_MBP_SR), 198 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro4,1", M_MBP_4), 199 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro5,1", M_MBP_5_1), 200 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro5,2", M_MBP_5_2), 201 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro5,3", M_MBP_5_3), 202 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro6,1", M_MBP_6_1), 203 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro6,2", M_MBP_6_2), 204 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro7,1", M_MBP_7_1), 205 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro8,2", M_MBP_8_2), 206 {}, 207}; 208 209__init void sysfb_apply_efi_quirks(void) 210{ 211 if (screen_info.orig_video_isVGA != VIDEO_TYPE_EFI || 212 !(screen_info.capabilities & VIDEO_CAPABILITY_SKIP_QUIRKS)) 213 dmi_check_system(efifb_dmi_system_table); 214} 215