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Merge branch 'for-4.13-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq
[karo-tx-linux.git] / drivers / acpi / osi.c
1 /*
2  *  osi.c - _OSI implementation
3  *
4  *  Copyright (C) 2016 Intel Corporation
5  *    Author: Lv Zheng <lv.zheng@intel.com>
6  *
7  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
8  *
9  *  This program is free software; you can redistribute it and/or modify
10  *  it under the terms of the GNU General Public License as published by
11  *  the Free Software Foundation; either version 2 of the License, or (at
12  *  your option) any later version.
13  *
14  *  This program is distributed in the hope that it will be useful, but
15  *  WITHOUT ANY WARRANTY; without even the implied warranty of
16  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
17  *  General Public License for more details.
18  *
19  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
20  */
21
22 /* Uncomment next line to get verbose printout */
23 /* #define DEBUG */
24 #define pr_fmt(fmt) "ACPI: " fmt
25
26 #include <linux/module.h>
27 #include <linux/kernel.h>
28 #include <linux/acpi.h>
29 #include <linux/dmi.h>
30
31 #include "internal.h"
32
33
34 #define OSI_STRING_LENGTH_MAX   64
35 #define OSI_STRING_ENTRIES_MAX  16
36
37 struct acpi_osi_entry {
38         char string[OSI_STRING_LENGTH_MAX];
39         bool enable;
40 };
41
42 static struct acpi_osi_config {
43         u8              default_disabling;
44         unsigned int    linux_enable:1;
45         unsigned int    linux_dmi:1;
46         unsigned int    linux_cmdline:1;
47         unsigned int    darwin_enable:1;
48         unsigned int    darwin_dmi:1;
49         unsigned int    darwin_cmdline:1;
50 } osi_config;
51
52 static struct acpi_osi_config osi_config;
53 static struct acpi_osi_entry
54 osi_setup_entries[OSI_STRING_ENTRIES_MAX] __initdata = {
55         {"Module Device", true},
56         {"Processor Device", true},
57         {"3.0 _SCP Extensions", true},
58         {"Processor Aggregator Device", true},
59 };
60
61 static u32 acpi_osi_handler(acpi_string interface, u32 supported)
62 {
63         if (!strcmp("Linux", interface)) {
64                 pr_notice_once(FW_BUG
65                         "BIOS _OSI(Linux) query %s%s\n",
66                         osi_config.linux_enable ? "honored" : "ignored",
67                         osi_config.linux_cmdline ? " via cmdline" :
68                         osi_config.linux_dmi ? " via DMI" : "");
69         }
70         if (!strcmp("Darwin", interface)) {
71                 pr_notice_once(
72                         "BIOS _OSI(Darwin) query %s%s\n",
73                         osi_config.darwin_enable ? "honored" : "ignored",
74                         osi_config.darwin_cmdline ? " via cmdline" :
75                         osi_config.darwin_dmi ? " via DMI" : "");
76         }
77
78         return supported;
79 }
80
81 void __init acpi_osi_setup(char *str)
82 {
83         struct acpi_osi_entry *osi;
84         bool enable = true;
85         int i;
86
87         if (!acpi_gbl_create_osi_method)
88                 return;
89
90         if (str == NULL || *str == '\0') {
91                 pr_info("_OSI method disabled\n");
92                 acpi_gbl_create_osi_method = FALSE;
93                 return;
94         }
95
96         if (*str == '!') {
97                 str++;
98                 if (*str == '\0') {
99                         /* Do not override acpi_osi=!* */
100                         if (!osi_config.default_disabling)
101                                 osi_config.default_disabling =
102                                         ACPI_DISABLE_ALL_VENDOR_STRINGS;
103                         return;
104                 } else if (*str == '*') {
105                         osi_config.default_disabling = ACPI_DISABLE_ALL_STRINGS;
106                         for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) {
107                                 osi = &osi_setup_entries[i];
108                                 osi->enable = false;
109                         }
110                         return;
111                 } else if (*str == '!') {
112                         osi_config.default_disabling = 0;
113                         return;
114                 }
115                 enable = false;
116         }
117
118         for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) {
119                 osi = &osi_setup_entries[i];
120                 if (!strcmp(osi->string, str)) {
121                         osi->enable = enable;
122                         break;
123                 } else if (osi->string[0] == '\0') {
124                         osi->enable = enable;
125                         strncpy(osi->string, str, OSI_STRING_LENGTH_MAX);
126                         break;
127                 }
128         }
129 }
130
131 static void __init __acpi_osi_setup_darwin(bool enable)
132 {
133         osi_config.darwin_enable = !!enable;
134         if (enable) {
135                 acpi_osi_setup("!");
136                 acpi_osi_setup("Darwin");
137         } else {
138                 acpi_osi_setup("!!");
139                 acpi_osi_setup("!Darwin");
140         }
141 }
142
143 static void __init acpi_osi_setup_darwin(bool enable)
144 {
145         /* Override acpi_osi_dmi_blacklisted() */
146         osi_config.darwin_dmi = 0;
147         osi_config.darwin_cmdline = 1;
148         __acpi_osi_setup_darwin(enable);
149 }
150
151 /*
152  * The story of _OSI(Linux)
153  *
154  * From pre-history through Linux-2.6.22, Linux responded TRUE upon a BIOS
155  * OSI(Linux) query.
156  *
157  * Unfortunately, reference BIOS writers got wind of this and put
158  * OSI(Linux) in their example code, quickly exposing this string as
159  * ill-conceived and opening the door to an un-bounded number of BIOS
160  * incompatibilities.
161  *
162  * For example, OSI(Linux) was used on resume to re-POST a video card on
163  * one system, because Linux at that time could not do a speedy restore in
164  * its native driver. But then upon gaining quick native restore
165  * capability, Linux has no way to tell the BIOS to skip the time-consuming
166  * POST -- putting Linux at a permanent performance disadvantage. On
167  * another system, the BIOS writer used OSI(Linux) to infer native OS
168  * support for IPMI!  On other systems, OSI(Linux) simply got in the way of
169  * Linux claiming to be compatible with other operating systems, exposing
170  * BIOS issues such as skipped device initialization.
171  *
172  * So "Linux" turned out to be a really poor chose of OSI string, and from
173  * Linux-2.6.23 onward we respond FALSE.
174  *
175  * BIOS writers should NOT query _OSI(Linux) on future systems. Linux will
176  * complain on the console when it sees it, and return FALSE. To get Linux
177  * to return TRUE for your system  will require a kernel source update to
178  * add a DMI entry, or boot with "acpi_osi=Linux"
179  */
180 static void __init __acpi_osi_setup_linux(bool enable)
181 {
182         osi_config.linux_enable = !!enable;
183         if (enable)
184                 acpi_osi_setup("Linux");
185         else
186                 acpi_osi_setup("!Linux");
187 }
188
189 static void __init acpi_osi_setup_linux(bool enable)
190 {
191         /* Override acpi_osi_dmi_blacklisted() */
192         osi_config.linux_dmi = 0;
193         osi_config.linux_cmdline = 1;
194         __acpi_osi_setup_linux(enable);
195 }
196
197 /*
198  * Modify the list of "OS Interfaces" reported to BIOS via _OSI
199  *
200  * empty string disables _OSI
201  * string starting with '!' disables that string
202  * otherwise string is added to list, augmenting built-in strings
203  */
204 static void __init acpi_osi_setup_late(void)
205 {
206         struct acpi_osi_entry *osi;
207         char *str;
208         int i;
209         acpi_status status;
210
211         if (osi_config.default_disabling) {
212                 status = acpi_update_interfaces(osi_config.default_disabling);
213                 if (ACPI_SUCCESS(status))
214                         pr_info("Disabled all _OSI OS vendors%s\n",
215                                 osi_config.default_disabling ==
216                                 ACPI_DISABLE_ALL_STRINGS ?
217                                 " and feature groups" : "");
218         }
219
220         for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) {
221                 osi = &osi_setup_entries[i];
222                 str = osi->string;
223                 if (*str == '\0')
224                         break;
225                 if (osi->enable) {
226                         status = acpi_install_interface(str);
227                         if (ACPI_SUCCESS(status))
228                                 pr_info("Added _OSI(%s)\n", str);
229                 } else {
230                         status = acpi_remove_interface(str);
231                         if (ACPI_SUCCESS(status))
232                                 pr_info("Deleted _OSI(%s)\n", str);
233                 }
234         }
235 }
236
237 static int __init osi_setup(char *str)
238 {
239         if (str && !strcmp("Linux", str))
240                 acpi_osi_setup_linux(true);
241         else if (str && !strcmp("!Linux", str))
242                 acpi_osi_setup_linux(false);
243         else if (str && !strcmp("Darwin", str))
244                 acpi_osi_setup_darwin(true);
245         else if (str && !strcmp("!Darwin", str))
246                 acpi_osi_setup_darwin(false);
247         else
248                 acpi_osi_setup(str);
249
250         return 1;
251 }
252 __setup("acpi_osi=", osi_setup);
253
254 bool acpi_osi_is_win8(void)
255 {
256         return acpi_gbl_osi_data >= ACPI_OSI_WIN_8;
257 }
258 EXPORT_SYMBOL(acpi_osi_is_win8);
259
260 static void __init acpi_osi_dmi_darwin(bool enable,
261                                        const struct dmi_system_id *d)
262 {
263         pr_notice("DMI detected to setup _OSI(\"Darwin\"): %s\n", d->ident);
264         osi_config.darwin_dmi = 1;
265         __acpi_osi_setup_darwin(enable);
266 }
267
268 static void __init acpi_osi_dmi_linux(bool enable,
269                                       const struct dmi_system_id *d)
270 {
271         pr_notice("DMI detected to setup _OSI(\"Linux\"): %s\n", d->ident);
272         osi_config.linux_dmi = 1;
273         __acpi_osi_setup_linux(enable);
274 }
275
276 static int __init dmi_enable_osi_darwin(const struct dmi_system_id *d)
277 {
278         acpi_osi_dmi_darwin(true, d);
279
280         return 0;
281 }
282
283 static int __init dmi_enable_osi_linux(const struct dmi_system_id *d)
284 {
285         acpi_osi_dmi_linux(true, d);
286
287         return 0;
288 }
289
290 static int __init dmi_disable_osi_vista(const struct dmi_system_id *d)
291 {
292         pr_notice("DMI detected: %s\n", d->ident);
293         acpi_osi_setup("!Windows 2006");
294         acpi_osi_setup("!Windows 2006 SP1");
295         acpi_osi_setup("!Windows 2006 SP2");
296
297         return 0;
298 }
299
300 static int __init dmi_disable_osi_win7(const struct dmi_system_id *d)
301 {
302         pr_notice("DMI detected: %s\n", d->ident);
303         acpi_osi_setup("!Windows 2009");
304
305         return 0;
306 }
307
308 static int __init dmi_disable_osi_win8(const struct dmi_system_id *d)
309 {
310         pr_notice("DMI detected: %s\n", d->ident);
311         acpi_osi_setup("!Windows 2012");
312
313         return 0;
314 }
315
316 /*
317  * Linux default _OSI response behavior is determined by this DMI table.
318  *
319  * Note that _OSI("Linux")/_OSI("Darwin") determined here can be overridden
320  * by acpi_osi=!Linux/acpi_osi=!Darwin command line options.
321  */
322 static struct dmi_system_id acpi_osi_dmi_table[] __initdata = {
323         {
324         .callback = dmi_disable_osi_vista,
325         .ident = "Fujitsu Siemens",
326         .matches = {
327                      DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
328                      DMI_MATCH(DMI_PRODUCT_NAME, "ESPRIMO Mobile V5505"),
329                 },
330         },
331         {
332         /*
333          * There have a NVIF method in MSI GX723 DSDT need call by Nvidia
334          * driver (e.g. nouveau) when user press brightness hotkey.
335          * Currently, nouveau driver didn't do the job and it causes there
336          * have a infinite while loop in DSDT when user press hotkey.
337          * We add MSI GX723's dmi information to this table for workaround
338          * this issue.
339          * Will remove MSI GX723 from the table after nouveau grows support.
340          */
341         .callback = dmi_disable_osi_vista,
342         .ident = "MSI GX723",
343         .matches = {
344                      DMI_MATCH(DMI_SYS_VENDOR, "Micro-Star International"),
345                      DMI_MATCH(DMI_PRODUCT_NAME, "GX723"),
346                 },
347         },
348         {
349         .callback = dmi_disable_osi_vista,
350         .ident = "Sony VGN-NS10J_S",
351         .matches = {
352                      DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
353                      DMI_MATCH(DMI_PRODUCT_NAME, "VGN-NS10J_S"),
354                 },
355         },
356         {
357         .callback = dmi_disable_osi_vista,
358         .ident = "Sony VGN-SR290J",
359         .matches = {
360                      DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
361                      DMI_MATCH(DMI_PRODUCT_NAME, "VGN-SR290J"),
362                 },
363         },
364         {
365         .callback = dmi_disable_osi_vista,
366         .ident = "VGN-NS50B_L",
367         .matches = {
368                      DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
369                      DMI_MATCH(DMI_PRODUCT_NAME, "VGN-NS50B_L"),
370                 },
371         },
372         {
373         .callback = dmi_disable_osi_vista,
374         .ident = "VGN-SR19XN",
375         .matches = {
376                      DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
377                      DMI_MATCH(DMI_PRODUCT_NAME, "VGN-SR19XN"),
378                 },
379         },
380         {
381         .callback = dmi_disable_osi_vista,
382         .ident = "Toshiba Satellite L355",
383         .matches = {
384                      DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
385                      DMI_MATCH(DMI_PRODUCT_VERSION, "Satellite L355"),
386                 },
387         },
388         {
389         .callback = dmi_disable_osi_win7,
390         .ident = "ASUS K50IJ",
391         .matches = {
392                      DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."),
393                      DMI_MATCH(DMI_PRODUCT_NAME, "K50IJ"),
394                 },
395         },
396         {
397         .callback = dmi_disable_osi_vista,
398         .ident = "Toshiba P305D",
399         .matches = {
400                      DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
401                      DMI_MATCH(DMI_PRODUCT_NAME, "Satellite P305D"),
402                 },
403         },
404         {
405         .callback = dmi_disable_osi_vista,
406         .ident = "Toshiba NB100",
407         .matches = {
408                      DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
409                      DMI_MATCH(DMI_PRODUCT_NAME, "NB100"),
410                 },
411         },
412
413         /*
414          * The wireless hotkey does not work on those machines when
415          * returning true for _OSI("Windows 2012")
416          */
417         {
418         .callback = dmi_disable_osi_win8,
419         .ident = "Dell Inspiron 7737",
420         .matches = {
421                     DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
422                     DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7737"),
423                 },
424         },
425         {
426         .callback = dmi_disable_osi_win8,
427         .ident = "Dell Inspiron 7537",
428         .matches = {
429                     DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
430                     DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7537"),
431                 },
432         },
433         {
434         .callback = dmi_disable_osi_win8,
435         .ident = "Dell Inspiron 5437",
436         .matches = {
437                     DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
438                     DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 5437"),
439                 },
440         },
441         {
442         .callback = dmi_disable_osi_win8,
443         .ident = "Dell Inspiron 3437",
444         .matches = {
445                     DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
446                     DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 3437"),
447                 },
448         },
449         {
450         .callback = dmi_disable_osi_win8,
451         .ident = "Dell Vostro 3446",
452         .matches = {
453                     DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
454                     DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3446"),
455                 },
456         },
457         {
458         .callback = dmi_disable_osi_win8,
459         .ident = "Dell Vostro 3546",
460         .matches = {
461                     DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
462                     DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3546"),
463                 },
464         },
465
466         /*
467          * BIOS invocation of _OSI(Linux) is almost always a BIOS bug.
468          * Linux ignores it, except for the machines enumerated below.
469          */
470
471         /*
472          * Without this this EEEpc exports a non working WMI interface, with
473          * this it exports a working "good old" eeepc_laptop interface, fixing
474          * both brightness control, and rfkill not working.
475          */
476         {
477         .callback = dmi_enable_osi_linux,
478         .ident = "Asus EEE PC 1015PX",
479         .matches = {
480                      DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer INC."),
481                      DMI_MATCH(DMI_PRODUCT_NAME, "1015PX"),
482                 },
483         },
484
485         /*
486          * Enable _OSI("Darwin") for all apple platforms.
487          */
488         {
489         .callback = dmi_enable_osi_darwin,
490         .ident = "Apple hardware",
491         .matches = {
492                      DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
493                 },
494         },
495         {
496         .callback = dmi_enable_osi_darwin,
497         .ident = "Apple hardware",
498         .matches = {
499                      DMI_MATCH(DMI_SYS_VENDOR, "Apple Computer, Inc."),
500                 },
501         },
502         {}
503 };
504
505 static __init void acpi_osi_dmi_blacklisted(void)
506 {
507         dmi_check_system(acpi_osi_dmi_table);
508 }
509
510 int __init early_acpi_osi_init(void)
511 {
512         acpi_osi_dmi_blacklisted();
513
514         return 0;
515 }
516
517 int __init acpi_osi_init(void)
518 {
519         acpi_install_interface_handler(acpi_osi_handler);
520         acpi_osi_setup_late();
521
522         return 0;
523 }