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2995e506 DH |
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 | #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 | ||
80 | static 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 | ||
164 | static 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 | } |