]> Git Repo - linux.git/blob - drivers/acpi/x86/utils.c
x86/kaslr: Expose and use the end of the physical memory address space
[linux.git] / drivers / acpi / x86 / utils.c
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * X86 ACPI Utility Functions
4  *
5  * Copyright (C) 2017 Hans de Goede <[email protected]>
6  *
7  * Based on various non upstream patches to support the CHT Whiskey Cove PMIC:
8  * Copyright (C) 2013-2015 Intel Corporation. All rights reserved.
9  */
10
11 #define pr_fmt(fmt) "ACPI: " fmt
12
13 #include <linux/acpi.h>
14 #include <linux/dmi.h>
15 #include <linux/platform_device.h>
16 #include <asm/cpu_device_id.h>
17 #include <asm/intel-family.h>
18 #include "../internal.h"
19
20 /*
21  * Some ACPI devices are hidden (status == 0x0) in recent BIOS-es because
22  * some recent Windows drivers bind to one device but poke at multiple
23  * devices at the same time, so the others get hidden.
24  *
25  * Some BIOS-es (temporarily) hide specific APCI devices to work around Windows
26  * driver bugs. We use DMI matching to match known cases of this.
27  *
28  * Likewise sometimes some not-actually present devices are sometimes
29  * reported as present, which may cause issues.
30  *
31  * We work around this by using the below quirk list to override the status
32  * reported by the _STA method with a fixed value (ACPI_STA_DEFAULT or 0).
33  * Note this MUST only be done for devices where this is safe.
34  *
35  * This status overriding is limited to specific CPU (SoC) models both to
36  * avoid potentially causing trouble on other models and because some HIDs
37  * are re-used on different SoCs for completely different devices.
38  */
39 struct override_status_id {
40         struct acpi_device_id hid[2];
41         struct x86_cpu_id cpu_ids[2];
42         struct dmi_system_id dmi_ids[2]; /* Optional */
43         const char *uid;
44         const char *path;
45         unsigned long long status;
46 };
47
48 #define ENTRY(status, hid, uid, path, cpu_vfm, dmi...) {                \
49         { { hid, }, {} },                                               \
50         { X86_MATCH_VFM(cpu_vfm, NULL), {} },                           \
51         { { .matches = dmi }, {} },                                     \
52         uid,                                                            \
53         path,                                                           \
54         status,                                                         \
55 }
56
57 #define PRESENT_ENTRY_HID(hid, uid, cpu_vfm, dmi...) \
58         ENTRY(ACPI_STA_DEFAULT, hid, uid, NULL, cpu_vfm, dmi)
59
60 #define NOT_PRESENT_ENTRY_HID(hid, uid, cpu_vfm, dmi...) \
61         ENTRY(0, hid, uid, NULL, cpu_vfm, dmi)
62
63 #define PRESENT_ENTRY_PATH(path, cpu_vfm, dmi...) \
64         ENTRY(ACPI_STA_DEFAULT, "", NULL, path, cpu_vfm, dmi)
65
66 #define NOT_PRESENT_ENTRY_PATH(path, cpu_vfm, dmi...) \
67         ENTRY(0, "", NULL, path, cpu_vfm, dmi)
68
69 static const struct override_status_id override_status_ids[] = {
70         /*
71          * Bay / Cherry Trail PWM directly poked by GPU driver in win10,
72          * but Linux uses a separate PWM driver, harmless if not used.
73          */
74         PRESENT_ENTRY_HID("80860F09", "1", INTEL_ATOM_SILVERMONT, {}),
75         PRESENT_ENTRY_HID("80862288", "1", INTEL_ATOM_AIRMONT, {}),
76
77         /* The Xiaomi Mi Pad 2 uses PWM2 for touchkeys backlight control */
78         PRESENT_ENTRY_HID("80862289", "2", INTEL_ATOM_AIRMONT, {
79                 DMI_MATCH(DMI_SYS_VENDOR, "Xiaomi Inc"),
80                 DMI_MATCH(DMI_PRODUCT_NAME, "Mipad2"),
81               }),
82
83         /*
84          * The INT0002 device is necessary to clear wakeup interrupt sources
85          * on Cherry Trail devices, without it we get nobody cared IRQ msgs.
86          */
87         PRESENT_ENTRY_HID("INT0002", "1", INTEL_ATOM_AIRMONT, {}),
88         /*
89          * On the Dell Venue 11 Pro 7130 and 7139, the DSDT hides
90          * the touchscreen ACPI device until a certain time
91          * after _SB.PCI0.GFX0.LCD.LCD1._ON gets called has passed
92          * *and* _STA has been called at least 3 times since.
93          */
94         PRESENT_ENTRY_HID("SYNA7500", "1", INTEL_HASWELL_L, {
95                 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
96                 DMI_MATCH(DMI_PRODUCT_NAME, "Venue 11 Pro 7130"),
97               }),
98         PRESENT_ENTRY_HID("SYNA7500", "1", INTEL_HASWELL_L, {
99                 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
100                 DMI_MATCH(DMI_PRODUCT_NAME, "Venue 11 Pro 7139"),
101               }),
102
103         /*
104          * The Dell XPS 15 9550 has a SMO8110 accelerometer /
105          * HDD freefall sensor which is wrongly marked as not present.
106          */
107         PRESENT_ENTRY_HID("SMO8810", "1", INTEL_SKYLAKE, {
108                 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
109                 DMI_MATCH(DMI_PRODUCT_NAME, "XPS 15 9550"),
110               }),
111
112         /*
113          * The GPD win BIOS dated 20170221 has disabled the accelerometer, the
114          * drivers sometimes cause crashes under Windows and this is how the
115          * manufacturer has solved this :|  The DMI match may not seem unique,
116          * but it is. In the 67000+ DMI decode dumps from linux-hardware.org
117          * only 116 have board_vendor set to "AMI Corporation" and of those 116
118          * only the GPD win and pocket entries' board_name is "Default string".
119          *
120          * Unfortunately the GPD pocket also uses these strings and its BIOS
121          * was copy-pasted from the GPD win, so it has a disabled KIOX000A
122          * node which we should not enable, thus we also check the BIOS date.
123          */
124         PRESENT_ENTRY_HID("KIOX000A", "1", INTEL_ATOM_AIRMONT, {
125                 DMI_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"),
126                 DMI_MATCH(DMI_BOARD_NAME, "Default string"),
127                 DMI_MATCH(DMI_PRODUCT_NAME, "Default string"),
128                 DMI_MATCH(DMI_BIOS_DATE, "02/21/2017")
129               }),
130         PRESENT_ENTRY_HID("KIOX000A", "1", INTEL_ATOM_AIRMONT, {
131                 DMI_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"),
132                 DMI_MATCH(DMI_BOARD_NAME, "Default string"),
133                 DMI_MATCH(DMI_PRODUCT_NAME, "Default string"),
134                 DMI_MATCH(DMI_BIOS_DATE, "03/20/2017")
135               }),
136         PRESENT_ENTRY_HID("KIOX000A", "1", INTEL_ATOM_AIRMONT, {
137                 DMI_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"),
138                 DMI_MATCH(DMI_BOARD_NAME, "Default string"),
139                 DMI_MATCH(DMI_PRODUCT_NAME, "Default string"),
140                 DMI_MATCH(DMI_BIOS_DATE, "05/25/2017")
141               }),
142
143         /*
144          * The GPD win/pocket have a PCI wifi card, but its DSDT has the SDIO
145          * mmc controller enabled and that has a child-device which _PS3
146          * method sets a GPIO causing the PCI wifi card to turn off.
147          * See above remark about uniqueness of the DMI match.
148          */
149         NOT_PRESENT_ENTRY_PATH("\\_SB_.PCI0.SDHB.BRC1", INTEL_ATOM_AIRMONT, {
150                 DMI_EXACT_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"),
151                 DMI_EXACT_MATCH(DMI_BOARD_NAME, "Default string"),
152                 DMI_EXACT_MATCH(DMI_BOARD_SERIAL, "Default string"),
153                 DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Default string"),
154               }),
155
156         /*
157          * The LSM303D on the Lenovo Yoga Tablet 2 series is present
158          * as both ACCL0001 and MAGN0001. As we can only ever register an
159          * i2c client for one of them, ignore MAGN0001.
160          */
161         NOT_PRESENT_ENTRY_HID("MAGN0001", "1", INTEL_ATOM_SILVERMONT, {
162                 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
163                 DMI_MATCH(DMI_PRODUCT_FAMILY, "YOGATablet2"),
164               }),
165 };
166
167 bool acpi_device_override_status(struct acpi_device *adev, unsigned long long *status)
168 {
169         bool ret = false;
170         unsigned int i;
171
172         for (i = 0; i < ARRAY_SIZE(override_status_ids); i++) {
173                 if (!x86_match_cpu(override_status_ids[i].cpu_ids))
174                         continue;
175
176                 if (override_status_ids[i].dmi_ids[0].matches[0].slot &&
177                     !dmi_check_system(override_status_ids[i].dmi_ids))
178                         continue;
179
180                 if (override_status_ids[i].path) {
181                         struct acpi_buffer path = { ACPI_ALLOCATE_BUFFER, NULL };
182                         bool match;
183
184                         if (acpi_get_name(adev->handle, ACPI_FULL_PATHNAME, &path))
185                                 continue;
186
187                         match = strcmp((char *)path.pointer, override_status_ids[i].path) == 0;
188                         kfree(path.pointer);
189
190                         if (!match)
191                                 continue;
192                 } else {
193                         if (acpi_match_device_ids(adev, override_status_ids[i].hid))
194                                 continue;
195
196                         if (!acpi_dev_uid_match(adev, override_status_ids[i].uid))
197                                 continue;
198                 }
199
200                 *status = override_status_ids[i].status;
201                 ret = true;
202                 break;
203         }
204
205         return ret;
206 }
207
208 /*
209  * AMD systems from Renoir onwards *require* that the NVME controller
210  * is put into D3 over a Modern Standby / suspend-to-idle cycle.
211  *
212  * This is "typically" accomplished using the `StorageD3Enable`
213  * property in the _DSD that is checked via the `acpi_storage_d3` function
214  * but some OEM systems still don't have it in their BIOS.
215  *
216  * The Microsoft documentation for StorageD3Enable mentioned that Windows has
217  * a hardcoded allowlist for D3 support as well as a registry key to override
218  * the BIOS, which has been used for these cases.
219  *
220  * This allows quirking on Linux in a similar fashion.
221  *
222  * Cezanne systems shouldn't *normally* need this as the BIOS includes
223  * StorageD3Enable.  But for two reasons we have added it.
224  * 1) The BIOS on a number of Dell systems have ambiguity
225  *    between the same value used for _ADR on ACPI nodes GPP1.DEV0 and GPP1.NVME.
226  *    GPP1.NVME is needed to get StorageD3Enable node set properly.
227  *    https://bugzilla.kernel.org/show_bug.cgi?id=216440
228  *    https://bugzilla.kernel.org/show_bug.cgi?id=216773
229  *    https://bugzilla.kernel.org/show_bug.cgi?id=217003
230  * 2) On at least one HP system StorageD3Enable is missing on the second NVME
231  *    disk in the system.
232  * 3) On at least one HP Rembrandt system StorageD3Enable is missing on the only
233  *    NVME device.
234  */
235 bool force_storage_d3(void)
236 {
237         if (!cpu_feature_enabled(X86_FEATURE_ZEN))
238                 return false;
239         return acpi_gbl_FADT.flags & ACPI_FADT_LOW_POWER_S0;
240 }
241
242 /*
243  * x86 ACPI boards which ship with only Android as their factory image usually
244  * declare a whole bunch of bogus I2C devices in their ACPI tables and sometimes
245  * there are issues with serdev devices on these boards too, e.g. the resource
246  * points to the wrong serdev_controller.
247  *
248  * Instantiating I2C / serdev devs for these bogus devs causes various issues,
249  * e.g. GPIO/IRQ resource conflicts because sometimes drivers do bind to them.
250  * The Android x86 kernel fork shipped on these devices has some special code
251  * to remove the bogus I2C clients (and AFAICT serdevs are ignored completely).
252  *
253  * The acpi_quirk_skip_*_enumeration() functions below are used by the I2C or
254  * serdev code to skip instantiating any I2C or serdev devs on broken boards.
255  *
256  * In case of I2C an exception is made for HIDs on the i2c_acpi_known_good_ids
257  * list. These are known to always be correct (and in case of the audio-codecs
258  * the drivers heavily rely on the codec being enumerated through ACPI).
259  *
260  * Note these boards typically do actually have I2C and serdev devices,
261  * just different ones then the ones described in their DSDT. The devices
262  * which are actually present are manually instantiated by the
263  * drivers/platform/x86/x86-android-tablets.c kernel module.
264  */
265 #define ACPI_QUIRK_SKIP_I2C_CLIENTS                             BIT(0)
266 #define ACPI_QUIRK_UART1_SKIP                                   BIT(1)
267 #define ACPI_QUIRK_UART1_TTY_UART2_SKIP                         BIT(2)
268 #define ACPI_QUIRK_PNP_UART1_SKIP                               BIT(3)
269 #define ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY                     BIT(4)
270 #define ACPI_QUIRK_USE_ACPI_AC_AND_BATTERY                      BIT(5)
271 #define ACPI_QUIRK_SKIP_GPIO_EVENT_HANDLERS                     BIT(6)
272
273 static const struct dmi_system_id acpi_quirk_skip_dmi_ids[] = {
274         /*
275          * 1. Devices with only the skip / don't-skip AC and battery quirks,
276          *    sorted alphabetically.
277          */
278         {
279                 /* ECS EF20EA, AXP288 PMIC but uses separate fuel-gauge */
280                 .matches = {
281                         DMI_MATCH(DMI_PRODUCT_NAME, "EF20EA"),
282                 },
283                 .driver_data = (void *)ACPI_QUIRK_USE_ACPI_AC_AND_BATTERY
284         },
285         {
286                 /* Lenovo Ideapad Miix 320, AXP288 PMIC, separate fuel-gauge */
287                 .matches = {
288                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
289                         DMI_MATCH(DMI_PRODUCT_NAME, "80XF"),
290                         DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo MIIX 320-10ICR"),
291                 },
292                 .driver_data = (void *)ACPI_QUIRK_USE_ACPI_AC_AND_BATTERY
293         },
294
295         /*
296          * 2. Devices which also have the skip i2c/serdev quirks and which
297          *    need the x86-android-tablets module to properly work.
298          */
299 #if IS_ENABLED(CONFIG_X86_ANDROID_TABLETS)
300         {
301                 /* Acer Iconia One 7 B1-750 */
302                 .matches = {
303                         DMI_MATCH(DMI_SYS_VENDOR, "Insyde"),
304                         DMI_MATCH(DMI_PRODUCT_NAME, "VESPA2"),
305                 },
306                 .driver_data = (void *)(ACPI_QUIRK_SKIP_I2C_CLIENTS |
307                                         ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY |
308                                         ACPI_QUIRK_SKIP_GPIO_EVENT_HANDLERS),
309         },
310         {
311                 .matches = {
312                         DMI_EXACT_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
313                         DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "ME176C"),
314                 },
315                 .driver_data = (void *)(ACPI_QUIRK_SKIP_I2C_CLIENTS |
316                                         ACPI_QUIRK_UART1_TTY_UART2_SKIP |
317                                         ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY |
318                                         ACPI_QUIRK_SKIP_GPIO_EVENT_HANDLERS),
319         },
320         {
321                 /* Lenovo Yoga Book X90F/L */
322                 .matches = {
323                         DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Intel Corporation"),
324                         DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "CHERRYVIEW D1 PLATFORM"),
325                         DMI_EXACT_MATCH(DMI_PRODUCT_VERSION, "YETI-11"),
326                 },
327                 .driver_data = (void *)(ACPI_QUIRK_SKIP_I2C_CLIENTS |
328                                         ACPI_QUIRK_UART1_SKIP |
329                                         ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY |
330                                         ACPI_QUIRK_SKIP_GPIO_EVENT_HANDLERS),
331         },
332         {
333                 .matches = {
334                         DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
335                         DMI_MATCH(DMI_PRODUCT_NAME, "TF103C"),
336                 },
337                 .driver_data = (void *)(ACPI_QUIRK_SKIP_I2C_CLIENTS |
338                                         ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY |
339                                         ACPI_QUIRK_SKIP_GPIO_EVENT_HANDLERS),
340         },
341         {
342                 /* Lenovo Yoga Tablet 2 1050F/L */
343                 .matches = {
344                         DMI_MATCH(DMI_SYS_VENDOR, "Intel Corp."),
345                         DMI_MATCH(DMI_PRODUCT_NAME, "VALLEYVIEW C0 PLATFORM"),
346                         DMI_MATCH(DMI_BOARD_NAME, "BYT-T FFD8"),
347                         /* Partial match on beginning of BIOS version */
348                         DMI_MATCH(DMI_BIOS_VERSION, "BLADE_21"),
349                 },
350                 .driver_data = (void *)(ACPI_QUIRK_SKIP_I2C_CLIENTS |
351                                         ACPI_QUIRK_PNP_UART1_SKIP |
352                                         ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY),
353         },
354         {
355                 /* Lenovo Yoga Tab 3 Pro X90F */
356                 .matches = {
357                         DMI_MATCH(DMI_SYS_VENDOR, "Intel Corporation"),
358                         DMI_MATCH(DMI_PRODUCT_NAME, "CHERRYVIEW D1 PLATFORM"),
359                         DMI_MATCH(DMI_PRODUCT_VERSION, "Blade3-10A-001"),
360                 },
361                 .driver_data = (void *)(ACPI_QUIRK_SKIP_I2C_CLIENTS |
362                                         ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY),
363         },
364         {
365                 /* Medion Lifetab S10346 */
366                 .matches = {
367                         DMI_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"),
368                         DMI_MATCH(DMI_BOARD_NAME, "Aptio CRB"),
369                         /* Way too generic, also match on BIOS data */
370                         DMI_MATCH(DMI_BIOS_DATE, "10/22/2015"),
371                 },
372                 .driver_data = (void *)(ACPI_QUIRK_SKIP_I2C_CLIENTS |
373                                         ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY),
374         },
375         {
376                 /* Nextbook Ares 8 (BYT version)*/
377                 .matches = {
378                         DMI_MATCH(DMI_SYS_VENDOR, "Insyde"),
379                         DMI_MATCH(DMI_PRODUCT_NAME, "M890BAP"),
380                 },
381                 .driver_data = (void *)(ACPI_QUIRK_SKIP_I2C_CLIENTS |
382                                         ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY |
383                                         ACPI_QUIRK_SKIP_GPIO_EVENT_HANDLERS),
384         },
385         {
386                 /* Nextbook Ares 8A (CHT version)*/
387                 .matches = {
388                         DMI_MATCH(DMI_SYS_VENDOR, "Insyde"),
389                         DMI_MATCH(DMI_PRODUCT_NAME, "CherryTrail"),
390                         DMI_MATCH(DMI_BIOS_VERSION, "M882"),
391                 },
392                 .driver_data = (void *)(ACPI_QUIRK_SKIP_I2C_CLIENTS |
393                                         ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY),
394         },
395         {
396                 /* Whitelabel (sold as various brands) TM800A550L */
397                 .matches = {
398                         DMI_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"),
399                         DMI_MATCH(DMI_BOARD_NAME, "Aptio CRB"),
400                         /* Above strings are too generic, also match on BIOS version */
401                         DMI_MATCH(DMI_BIOS_VERSION, "ZY-8-BI-PX4S70VTR400-X423B-005-D"),
402                 },
403                 .driver_data = (void *)(ACPI_QUIRK_SKIP_I2C_CLIENTS |
404                                         ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY),
405         },
406 #endif
407         {}
408 };
409
410 #if IS_ENABLED(CONFIG_X86_ANDROID_TABLETS)
411 static const struct acpi_device_id i2c_acpi_known_good_ids[] = {
412         { "10EC5640", 0 }, /* RealTek ALC5640 audio codec */
413         { "10EC5651", 0 }, /* RealTek ALC5651 audio codec */
414         { "INT33F4", 0 },  /* X-Powers AXP288 PMIC */
415         { "INT33FD", 0 },  /* Intel Crystal Cove PMIC */
416         { "INT34D3", 0 },  /* Intel Whiskey Cove PMIC */
417         { "NPCE69A", 0 },  /* Asus Transformer keyboard dock */
418         {}
419 };
420
421 bool acpi_quirk_skip_i2c_client_enumeration(struct acpi_device *adev)
422 {
423         const struct dmi_system_id *dmi_id;
424         long quirks;
425
426         dmi_id = dmi_first_match(acpi_quirk_skip_dmi_ids);
427         if (!dmi_id)
428                 return false;
429
430         quirks = (unsigned long)dmi_id->driver_data;
431         if (!(quirks & ACPI_QUIRK_SKIP_I2C_CLIENTS))
432                 return false;
433
434         return acpi_match_device_ids(adev, i2c_acpi_known_good_ids);
435 }
436 EXPORT_SYMBOL_GPL(acpi_quirk_skip_i2c_client_enumeration);
437
438 static int acpi_dmi_skip_serdev_enumeration(struct device *controller_parent, bool *skip)
439 {
440         struct acpi_device *adev = ACPI_COMPANION(controller_parent);
441         const struct dmi_system_id *dmi_id;
442         long quirks = 0;
443         u64 uid;
444         int ret;
445
446         ret = acpi_dev_uid_to_integer(adev, &uid);
447         if (ret)
448                 return 0;
449
450         dmi_id = dmi_first_match(acpi_quirk_skip_dmi_ids);
451         if (dmi_id)
452                 quirks = (unsigned long)dmi_id->driver_data;
453
454         if (!dev_is_platform(controller_parent)) {
455                 /* PNP enumerated UARTs */
456                 if ((quirks & ACPI_QUIRK_PNP_UART1_SKIP) && uid == 1)
457                         *skip = true;
458
459                 return 0;
460         }
461
462         if ((quirks & ACPI_QUIRK_UART1_SKIP) && uid == 1)
463                 *skip = true;
464
465         if (quirks & ACPI_QUIRK_UART1_TTY_UART2_SKIP) {
466                 if (uid == 1)
467                         return -ENODEV; /* Create tty cdev instead of serdev */
468
469                 if (uid == 2)
470                         *skip = true;
471         }
472
473         return 0;
474 }
475
476 bool acpi_quirk_skip_gpio_event_handlers(void)
477 {
478         const struct dmi_system_id *dmi_id;
479         long quirks;
480
481         dmi_id = dmi_first_match(acpi_quirk_skip_dmi_ids);
482         if (!dmi_id)
483                 return false;
484
485         quirks = (unsigned long)dmi_id->driver_data;
486         return (quirks & ACPI_QUIRK_SKIP_GPIO_EVENT_HANDLERS);
487 }
488 EXPORT_SYMBOL_GPL(acpi_quirk_skip_gpio_event_handlers);
489 #else
490 static int acpi_dmi_skip_serdev_enumeration(struct device *controller_parent, bool *skip)
491 {
492         return 0;
493 }
494 #endif
495
496 int acpi_quirk_skip_serdev_enumeration(struct device *controller_parent, bool *skip)
497 {
498         struct acpi_device *adev = ACPI_COMPANION(controller_parent);
499
500         *skip = false;
501
502         /*
503          * The DELL0501 ACPI HID represents an UART (CID is set to PNP0501) with
504          * a backlight-controller attached. There is no separate ACPI device with
505          * an UartSerialBusV2() resource to model the backlight-controller.
506          * Set skip to true so that the tty core creates a serdev ctrl device.
507          * The backlight driver will manually create the serdev client device.
508          */
509         if (acpi_dev_hid_match(adev, "DELL0501")) {
510                 *skip = true;
511                 /*
512                  * Create a platform dev for dell-uart-backlight to bind to.
513                  * This is a static device, so no need to store the result.
514                  */
515                 platform_device_register_simple("dell-uart-backlight", PLATFORM_DEVID_NONE,
516                                                 NULL, 0);
517                 return 0;
518         }
519
520         return acpi_dmi_skip_serdev_enumeration(controller_parent, skip);
521 }
522 EXPORT_SYMBOL_GPL(acpi_quirk_skip_serdev_enumeration);
523
524 /* Lists of PMIC ACPI HIDs with an (often better) native charger driver */
525 static const struct {
526         const char *hid;
527         int hrv;
528 } acpi_skip_ac_and_battery_pmic_ids[] = {
529         { "INT33F4", -1 }, /* X-Powers AXP288 PMIC */
530         { "INT34D3",  3 }, /* Intel Cherrytrail Whiskey Cove PMIC */
531 };
532
533 bool acpi_quirk_skip_acpi_ac_and_battery(void)
534 {
535         const struct dmi_system_id *dmi_id;
536         long quirks = 0;
537         int i;
538
539         dmi_id = dmi_first_match(acpi_quirk_skip_dmi_ids);
540         if (dmi_id)
541                 quirks = (unsigned long)dmi_id->driver_data;
542
543         if (quirks & ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY)
544                 return true;
545
546         if (quirks & ACPI_QUIRK_USE_ACPI_AC_AND_BATTERY)
547                 return false;
548
549         for (i = 0; i < ARRAY_SIZE(acpi_skip_ac_and_battery_pmic_ids); i++) {
550                 if (acpi_dev_present(acpi_skip_ac_and_battery_pmic_ids[i].hid, "1",
551                                      acpi_skip_ac_and_battery_pmic_ids[i].hrv)) {
552                         pr_info_once("found native %s PMIC, skipping ACPI AC and battery devices\n",
553                                      acpi_skip_ac_and_battery_pmic_ids[i].hid);
554                         return true;
555                 }
556         }
557
558         return false;
559 }
560 EXPORT_SYMBOL_GPL(acpi_quirk_skip_acpi_ac_and_battery);
561
562 /* This section provides a workaround for a specific x86 system
563  * which requires disabling of mwait to work correctly.
564  */
565 static int __init acpi_proc_quirk_set_no_mwait(const struct dmi_system_id *id)
566 {
567         pr_notice("%s detected - disabling mwait for CPU C-states\n",
568                   id->ident);
569         boot_option_idle_override = IDLE_NOMWAIT;
570         return 0;
571 }
572
573 static const struct dmi_system_id acpi_proc_quirk_mwait_dmi_table[] __initconst = {
574         {
575                 .callback = acpi_proc_quirk_set_no_mwait,
576                 .ident = "Extensa 5220",
577                 .matches =  {
578                         DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
579                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
580                         DMI_MATCH(DMI_PRODUCT_VERSION, "0100"),
581                         DMI_MATCH(DMI_BOARD_NAME, "Columbia"),
582                 },
583                 .driver_data = NULL,
584         },
585         {}
586 };
587
588 void __init acpi_proc_quirk_mwait_check(void)
589 {
590         /*
591          * Check whether the system is DMI table. If yes, OSPM
592          * should not use mwait for CPU-states.
593          */
594         dmi_check_system(acpi_proc_quirk_mwait_dmi_table);
595 }
This page took 0.067607 seconds and 4 git commands to generate.