arch/x86/kernel/sysfb_efi.c

   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
  30 enum {
  31         OVERRIDE_NONE = 0x0,
  32         OVERRIDE_BASE = 0x1,
  33         OVERRIDE_STRIDE = 0x2,
  34         OVERRIDE_HEIGHT = 0x4,
  35         OVERRIDE_WIDTH = 0x8,
  36 };
  37
  38 struct 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 void efifb_setup_from_dmi(struct screen_info *si, const char *opt)
  72 {
  73         int i;
  74
  75         for (i = 0; i < M_UNKNOWN; i++) {
  76                 if (efifb_dmi_list[i].base != 0 &&
  77                     !strcmp(opt, efifb_dmi_list[i].optname)) {
  78                         si->lfb_base = efifb_dmi_list[i].base;
  79                         si->lfb_linelength = efifb_dmi_list[i].stride;
  80                         si->lfb_width = efifb_dmi_list[i].width;
  81                         si->lfb_height = efifb_dmi_list[i].height;
  82                 }
  83         }
  84 }
  85
  86 #define choose_value(dmivalue, fwvalue, field, flags) ({        \
  87                 typeof(fwvalue) _ret_ = fwvalue;                \
  88                 if ((flags) & (field))                          \
  89                         _ret_ = dmivalue;                       \
  90                 else if ((fwvalue) == 0)                        \
  91                         _ret_ = dmivalue;                       \
  92                 _ret_;                                          \
  93         })
  94
  95 static int __init efifb_set_system(const struct dmi_system_id *id)
  96 {
  97         struct efifb_dmi_info *info = id->driver_data;
  98
  99         if (info->base == 0 && info->height == 0 && info->width == 0 &&
 100             info->stride == 0)
 101                 return 0;
 102
 103         /* Trust the bootloader over the DMI tables */
 104         if (screen_info.lfb_base == 0) {
 105 #if defined(CONFIG_PCI)
 106                 struct pci_dev *dev = NULL;
 107                 int found_bar = 0;
 108 #endif
 109                 if (info->base) {
 110                         screen_info.lfb_base = choose_value(info->base,
 111                                 screen_info.lfb_base, OVERRIDE_BASE,
 112                                 info->flags);
 113
 114 #if defined(CONFIG_PCI)
 115                         /* make sure that the address in the table is actually
 116                          * on a VGA device's PCI BAR */
 117
 118                         for_each_pci_dev(dev) {
 119                                 int i;
 120                                 if ((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA)
 121                                         continue;
 122                                 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
 123                                         resource_size_t start, end;
 124                                         unsigned long flags;
 125
 126                                         flags = pci_resource_flags(dev, i);
 127                                         if (!(flags & IORESOURCE_MEM))
 128                                                 continue;
 129
 130                                         if (flags & IORESOURCE_UNSET)
 131                                                 continue;
 132
 133                                         if (pci_resource_len(dev, i) == 0)
 134                                                 continue;
 135
 136                                         start = pci_resource_start(dev, i);
 137                                         end = pci_resource_end(dev, i);
 138                                         if (screen_info.lfb_base >= start &&
 139                                             screen_info.lfb_base < end) {
 140                                                 found_bar = 1;
 141                                                 break;
 142                                         }
 143                                 }
 144                         }
 145                         if (!found_bar)
 146                                 screen_info.lfb_base = 0;
 147 #endif
 148                 }
 149         }
 150         if (screen_info.lfb_base) {
 151                 screen_info.lfb_linelength = choose_value(info->stride,
 152                         screen_info.lfb_linelength, OVERRIDE_STRIDE,
 153                         info->flags);
 154                 screen_info.lfb_width = choose_value(info->width,
 155                         screen_info.lfb_width, OVERRIDE_WIDTH,
 156                         info->flags);
 157                 screen_info.lfb_height = choose_value(info->height,
 158                         screen_info.lfb_height, OVERRIDE_HEIGHT,
 159                         info->flags);
 160                 if (screen_info.orig_video_isVGA == 0)
 161                         screen_info.orig_video_isVGA = VIDEO_TYPE_EFI;
 162         } else {
 163                 screen_info.lfb_linelength = 0;
 164                 screen_info.lfb_width = 0;
 165                 screen_info.lfb_height = 0;
 166                 screen_info.orig_video_isVGA = 0;
 167                 return 0;
 168         }
 169
 170         printk(KERN_INFO "efifb: dmi detected %s - framebuffer at 0x%08x "
 171                          "(%dx%d, stride %d)\n", id->ident,
 172                          screen_info.lfb_base, screen_info.lfb_width,
 173                          screen_info.lfb_height, screen_info.lfb_linelength);
 174
 175         return 1;
 176 }
 177
 178 #define EFIFB_DMI_SYSTEM_ID(vendor, name, enumid)               \
 179         {                                                       \
 180                 efifb_set_system,                               \
 181                 name,                                           \
 182                 {                                               \
 183                         DMI_MATCH(DMI_BIOS_VENDOR, vendor),     \
 184                         DMI_MATCH(DMI_PRODUCT_NAME, name)       \
 185                 },                                              \
 186                 &efifb_dmi_list[enumid]                         \
 187         }
 188
 189 static const struct dmi_system_id efifb_dmi_system_table[] __initconst = {
 190         EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "iMac4,1", M_I17),
 191         /* At least one of these two will be right; maybe both? */
 192         EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "iMac5,1", M_I20),
 193         EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac5,1", M_I20),
 194         /* At least one of these two will be right; maybe both? */
 195         EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "iMac6,1", M_I24),
 196         EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac6,1", M_I24),
 197         EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac7,1", M_I20_SR),
 198         EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac8,1", M_I24_8_1),
 199         EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac10,1", M_I24_10_1),
 200         EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac11,1", M_I27_11_1),
 201         EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "Macmini1,1", M_MINI),
 202         EFIFB_DMI_SYSTEM_ID("Apple Inc.", "Macmini3,1", M_MINI_3_1),
 203         EFIFB_DMI_SYSTEM_ID("Apple Inc.", "Macmini4,1", M_MINI_4_1),
 204         EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBook1,1", M_MB),
 205         /* At least one of these two will be right; maybe both? */
 206         EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBook2,1", M_MB),
 207         EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook2,1", M_MB),
 208         /* At least one of these two will be right; maybe both? */
 209         EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBook3,1", M_MB),
 210         EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook3,1", M_MB),
 211         EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook4,1", M_MB),
 212         EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook5,1", M_MB_5_1),
 213         EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook6,1", M_MB_6_1),
 214         EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook7,1", M_MB_7_1),
 215         EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookAir1,1", M_MBA),
 216         EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookAir3,1", M_MBA_3),
 217         EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBookPro1,1", M_MBP),
 218         EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBookPro2,1", M_MBP_2),
 219         EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBookPro2,2", M_MBP_2_2),
 220         EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro2,1", M_MBP_2),
 221         EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBookPro3,1", M_MBP_SR),
 222         EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro3,1", M_MBP_SR),
 223         EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro4,1", M_MBP_4),
 224         EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro5,1", M_MBP_5_1),
 225         EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro5,2", M_MBP_5_2),
 226         EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro5,3", M_MBP_5_3),
 227         EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro6,1", M_MBP_6_1),
 228         EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro6,2", M_MBP_6_2),
 229         EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro7,1", M_MBP_7_1),
 230         EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro8,2", M_MBP_8_2),
 231         {},
 232 };
 233
 234 __init void sysfb_apply_efi_quirks(void)
 235 {
 236         if (screen_info.orig_video_isVGA != VIDEO_TYPE_EFI ||
 237             !(screen_info.capabilities & VIDEO_CAPABILITY_SKIP_QUIRKS))
 238                 dmi_check_system(efifb_dmi_system_table);
 239 }