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/efi.h>
23#include <linux/init.h>
24#include <linux/kernel.h>
25#include <linux/mm.h>
26#include <linux/pci.h>
27#include <linux/screen_info.h>
28#include <video/vga.h>
29
30#include <asm/efi.h>
31#include <asm/sysfb.h>
32
33enum {
34 OVERRIDE_NONE = 0x0,
35 OVERRIDE_BASE = 0x1,
36 OVERRIDE_STRIDE = 0x2,
37 OVERRIDE_HEIGHT = 0x4,
38 OVERRIDE_WIDTH = 0x8,
39};
40
41struct efifb_dmi_info efifb_dmi_list[] = {
42 [M_I17] = { "i17", 0x80010000, 1472 * 4, 1440, 900, OVERRIDE_NONE },
43 [M_I20] = { "i20", 0x80010000, 1728 * 4, 1680, 1050, OVERRIDE_NONE }, /* guess */
44 [M_I20_SR] = { "imac7", 0x40010000, 1728 * 4, 1680, 1050, OVERRIDE_NONE },
45 [M_I24] = { "i24", 0x80010000, 2048 * 4, 1920, 1200, OVERRIDE_NONE }, /* guess */
46 [M_I24_8_1] = { "imac8", 0xc0060000, 2048 * 4, 1920, 1200, OVERRIDE_NONE },
47 [M_I24_10_1] = { "imac10", 0xc0010000, 2048 * 4, 1920, 1080, OVERRIDE_NONE },
48 [M_I27_11_1] = { "imac11", 0xc0010000, 2560 * 4, 2560, 1440, OVERRIDE_NONE },
49 [M_MINI]= { "mini", 0x80000000, 2048 * 4, 1024, 768, OVERRIDE_NONE },
50 [M_MINI_3_1] = { "mini31", 0x40010000, 1024 * 4, 1024, 768, OVERRIDE_NONE },
51 [M_MINI_4_1] = { "mini41", 0xc0010000, 2048 * 4, 1920, 1200, OVERRIDE_NONE },
52 [M_MB] = { "macbook", 0x80000000, 2048 * 4, 1280, 800, OVERRIDE_NONE },
53 [M_MB_5_1] = { "macbook51", 0x80010000, 2048 * 4, 1280, 800, OVERRIDE_NONE },
54 [M_MB_6_1] = { "macbook61", 0x80010000, 2048 * 4, 1280, 800, OVERRIDE_NONE },
55 [M_MB_7_1] = { "macbook71", 0x80010000, 2048 * 4, 1280, 800, OVERRIDE_NONE },
56 [M_MBA] = { "mba", 0x80000000, 2048 * 4, 1280, 800, OVERRIDE_NONE },
57 /* 11" Macbook Air 3,1 passes the wrong stride */
58 [M_MBA_3] = { "mba3", 0, 2048 * 4, 0, 0, OVERRIDE_STRIDE },
59 [M_MBP] = { "mbp", 0x80010000, 1472 * 4, 1440, 900, OVERRIDE_NONE },
60 [M_MBP_2] = { "mbp2", 0, 0, 0, 0, OVERRIDE_NONE }, /* placeholder */
61 [M_MBP_2_2] = { "mbp22", 0x80010000, 1472 * 4, 1440, 900, OVERRIDE_NONE },
62 [M_MBP_SR] = { "mbp3", 0x80030000, 2048 * 4, 1440, 900, OVERRIDE_NONE },
63 [M_MBP_4] = { "mbp4", 0xc0060000, 2048 * 4, 1920, 1200, OVERRIDE_NONE },
64 [M_MBP_5_1] = { "mbp51", 0xc0010000, 2048 * 4, 1440, 900, OVERRIDE_NONE },
65 [M_MBP_5_2] = { "mbp52", 0xc0010000, 2048 * 4, 1920, 1200, OVERRIDE_NONE },
66 [M_MBP_5_3] = { "mbp53", 0xd0010000, 2048 * 4, 1440, 900, OVERRIDE_NONE },
67 [M_MBP_6_1] = { "mbp61", 0x90030000, 2048 * 4, 1920, 1200, OVERRIDE_NONE },
68 [M_MBP_6_2] = { "mbp62", 0x90030000, 2048 * 4, 1680, 1050, OVERRIDE_NONE },
69 [M_MBP_7_1] = { "mbp71", 0xc0010000, 2048 * 4, 1280, 800, OVERRIDE_NONE },
70 [M_MBP_8_2] = { "mbp82", 0x90010000, 1472 * 4, 1440, 900, OVERRIDE_NONE },
71 [M_UNKNOWN] = { NULL, 0, 0, 0, 0, OVERRIDE_NONE }
72};
73
74void efifb_setup_from_dmi(struct screen_info *si, const char *opt)
75{
76 int i;
77
78 for (i = 0; i < M_UNKNOWN; i++) {
79 if (efifb_dmi_list[i].base != 0 &&
80 !strcmp(opt, efifb_dmi_list[i].optname)) {
81 si->lfb_base = efifb_dmi_list[i].base;
82 si->lfb_linelength = efifb_dmi_list[i].stride;
83 si->lfb_width = efifb_dmi_list[i].width;
84 si->lfb_height = efifb_dmi_list[i].height;
85 }
86 }
87}
88
89#define choose_value(dmivalue, fwvalue, field, flags) ({ \
90 typeof(fwvalue) _ret_ = fwvalue; \
91 if ((flags) & (field)) \
92 _ret_ = dmivalue; \
93 else if ((fwvalue) == 0) \
94 _ret_ = dmivalue; \
95 _ret_; \
96 })
97
98static int __init efifb_set_system(const struct dmi_system_id *id)
99{
100 struct efifb_dmi_info *info = id->driver_data;
101
102 if (info->base == 0 && info->height == 0 && info->width == 0 &&
103 info->stride == 0)
104 return 0;
105
106 /* Trust the bootloader over the DMI tables */
107 if (screen_info.lfb_base == 0) {
108#if defined(CONFIG_PCI)
109 struct pci_dev *dev = NULL;
110 int found_bar = 0;
111#endif
112 if (info->base) {
113 screen_info.lfb_base = choose_value(info->base,
114 screen_info.lfb_base, OVERRIDE_BASE,
115 info->flags);
116
117#if defined(CONFIG_PCI)
118 /* make sure that the address in the table is actually
119 * on a VGA device's PCI BAR */
120
121 for_each_pci_dev(dev) {
122 int i;
123 if ((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA)
124 continue;
125 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
126 resource_size_t start, end;
127 unsigned long flags;
128
129 flags = pci_resource_flags(dev, i);
130 if (!(flags & IORESOURCE_MEM))
131 continue;
132
133 if (flags & IORESOURCE_UNSET)
134 continue;
135
136 if (pci_resource_len(dev, i) == 0)
137 continue;
138
139 start = pci_resource_start(dev, i);
140 end = pci_resource_end(dev, i);
141 if (screen_info.lfb_base >= start &&
142 screen_info.lfb_base < end) {
143 found_bar = 1;
144 break;
145 }
146 }
147 }
148 if (!found_bar)
149 screen_info.lfb_base = 0;
150#endif
151 }
152 }
153 if (screen_info.lfb_base) {
154 screen_info.lfb_linelength = choose_value(info->stride,
155 screen_info.lfb_linelength, OVERRIDE_STRIDE,
156 info->flags);
157 screen_info.lfb_width = choose_value(info->width,
158 screen_info.lfb_width, OVERRIDE_WIDTH,
159 info->flags);
160 screen_info.lfb_height = choose_value(info->height,
161 screen_info.lfb_height, OVERRIDE_HEIGHT,
162 info->flags);
163 if (screen_info.orig_video_isVGA == 0)
164 screen_info.orig_video_isVGA = VIDEO_TYPE_EFI;
165 } else {
166 screen_info.lfb_linelength = 0;
167 screen_info.lfb_width = 0;
168 screen_info.lfb_height = 0;
169 screen_info.orig_video_isVGA = 0;
170 return 0;
171 }
172
173 printk(KERN_INFO "efifb: dmi detected %s - framebuffer at 0x%08x "
174 "(%dx%d, stride %d)\n", id->ident,
175 screen_info.lfb_base, screen_info.lfb_width,
176 screen_info.lfb_height, screen_info.lfb_linelength);
177
178 return 1;
179}
180
181#define EFIFB_DMI_SYSTEM_ID(vendor, name, enumid) \
182 { \
183 efifb_set_system, \
184 name, \
185 { \
186 DMI_MATCH(DMI_BIOS_VENDOR, vendor), \
187 DMI_MATCH(DMI_PRODUCT_NAME, name) \
188 }, \
189 &efifb_dmi_list[enumid] \
190 }
191
192static const struct dmi_system_id efifb_dmi_system_table[] __initconst = {
193 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "iMac4,1", M_I17),
194 /* At least one of these two will be right; maybe both? */
195 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "iMac5,1", M_I20),
196 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac5,1", M_I20),
197 /* At least one of these two will be right; maybe both? */
198 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "iMac6,1", M_I24),
199 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac6,1", M_I24),
200 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac7,1", M_I20_SR),
201 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac8,1", M_I24_8_1),
202 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac10,1", M_I24_10_1),
203 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac11,1", M_I27_11_1),
204 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "Macmini1,1", M_MINI),
205 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "Macmini3,1", M_MINI_3_1),
206 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "Macmini4,1", M_MINI_4_1),
207 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBook1,1", M_MB),
208 /* At least one of these two will be right; maybe both? */
209 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBook2,1", M_MB),
210 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook2,1", M_MB),
211 /* At least one of these two will be right; maybe both? */
212 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBook3,1", M_MB),
213 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook3,1", M_MB),
214 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook4,1", M_MB),
215 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook5,1", M_MB_5_1),
216 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook6,1", M_MB_6_1),
217 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook7,1", M_MB_7_1),
218 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookAir1,1", M_MBA),
219 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookAir3,1", M_MBA_3),
220 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBookPro1,1", M_MBP),
221 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBookPro2,1", M_MBP_2),
222 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBookPro2,2", M_MBP_2_2),
223 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro2,1", M_MBP_2),
224 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBookPro3,1", M_MBP_SR),
225 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro3,1", M_MBP_SR),
226 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro4,1", M_MBP_4),
227 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro5,1", M_MBP_5_1),
228 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro5,2", M_MBP_5_2),
229 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro5,3", M_MBP_5_3),
230 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro6,1", M_MBP_6_1),
231 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro6,2", M_MBP_6_2),
232 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro7,1", M_MBP_7_1),
233 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro8,2", M_MBP_8_2),
234 {},
235};
236
237__init void sysfb_apply_efi_quirks(void)
238{
239 if (screen_info.orig_video_isVGA != VIDEO_TYPE_EFI ||
240 !(screen_info.capabilities & VIDEO_CAPABILITY_SKIP_QUIRKS))
241 dmi_check_system(efifb_dmi_system_table);
242}
243