1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Intel HID event & 5 button array driver
4 *
5 * Copyright (C) 2015 Alex Hung <alex.hung@canonical.com>
6 * Copyright (C) 2015 Andrew Lutomirski <luto@kernel.org>
7 */
8
9 #include <linux/acpi.h>
10 #include <linux/dmi.h>
11 #include <linux/input.h>
12 #include <linux/input/sparse-keymap.h>
13 #include <linux/kernel.h>
14 #include <linux/module.h>
15 #include <linux/platform_device.h>
16 #include <linux/suspend.h>
17 #include "../dual_accel_detect.h"
18
19 enum intel_hid_tablet_sw_mode {
20 TABLET_SW_AUTO = -1,
21 TABLET_SW_OFF = 0,
22 TABLET_SW_AT_EVENT,
23 TABLET_SW_AT_PROBE,
24 };
25
26 static bool enable_5_button_array;
27 module_param(enable_5_button_array, bool, 0444);
28 MODULE_PARM_DESC(enable_5_button_array,
29 "Enable 5 Button Array support. "
30 "If you need this please report this to: platform-driver-x86@vger.kernel.org");
31
32 static int enable_sw_tablet_mode = TABLET_SW_AUTO;
33 module_param(enable_sw_tablet_mode, int, 0444);
34 MODULE_PARM_DESC(enable_sw_tablet_mode,
35 "Enable SW_TABLET_MODE reporting -1:auto 0:off 1:at-first-event 2:at-probe. "
36 "If you need this please report this to: platform-driver-x86@vger.kernel.org");
37
38 /* When NOT in tablet mode, VGBS returns with the flag 0x40 */
39 #define TABLET_MODE_FLAG BIT(6)
40
41 MODULE_LICENSE("GPL");
42 MODULE_AUTHOR("Alex Hung");
43
44 static const struct acpi_device_id intel_hid_ids[] = {
45 {"INT33D5", 0},
46 {"INTC1051", 0},
47 {"INTC1054", 0},
48 {"INTC1070", 0},
49 {"INTC1076", 0},
50 {"INTC1077", 0},
51 {"INTC1078", 0},
52 {"", 0},
53 };
54 MODULE_DEVICE_TABLE(acpi, intel_hid_ids);
55
56 /* In theory, these are HID usages. */
57 static const struct key_entry intel_hid_keymap[] = {
58 /* 1: LSuper (Page 0x07, usage 0xE3) -- unclear what to do */
59 /* 2: Toggle SW_ROTATE_LOCK -- easy to implement if seen in wild */
60 { KE_KEY, 3, { KEY_NUMLOCK } },
61 { KE_KEY, 4, { KEY_HOME } },
62 { KE_KEY, 5, { KEY_END } },
63 { KE_KEY, 6, { KEY_PAGEUP } },
64 { KE_KEY, 7, { KEY_PAGEDOWN } },
65 { KE_KEY, 8, { KEY_RFKILL } },
66 { KE_KEY, 9, { KEY_POWER } },
67 { KE_KEY, 11, { KEY_SLEEP } },
68 /* 13 has two different meanings in the spec -- ignore it. */
69 { KE_KEY, 14, { KEY_STOPCD } },
70 { KE_KEY, 15, { KEY_PLAYPAUSE } },
71 { KE_KEY, 16, { KEY_MUTE } },
72 { KE_KEY, 17, { KEY_VOLUMEUP } },
73 { KE_KEY, 18, { KEY_VOLUMEDOWN } },
74 { KE_KEY, 19, { KEY_BRIGHTNESSUP } },
75 { KE_KEY, 20, { KEY_BRIGHTNESSDOWN } },
76 /* 27: wake -- needs special handling */
77 { KE_END },
78 };
79
80 /* 5 button array notification value. */
81 static const struct key_entry intel_array_keymap[] = {
82 { KE_KEY, 0xC2, { KEY_LEFTMETA } }, /* Press */
83 { KE_IGNORE, 0xC3, { KEY_LEFTMETA } }, /* Release */
84 { KE_KEY, 0xC4, { KEY_VOLUMEUP } }, /* Press */
85 { KE_IGNORE, 0xC5, { KEY_VOLUMEUP } }, /* Release */
86 { KE_KEY, 0xC6, { KEY_VOLUMEDOWN } }, /* Press */
87 { KE_IGNORE, 0xC7, { KEY_VOLUMEDOWN } }, /* Release */
88 { KE_KEY, 0xC8, { KEY_ROTATE_LOCK_TOGGLE } }, /* Press */
89 { KE_IGNORE, 0xC9, { KEY_ROTATE_LOCK_TOGGLE } }, /* Release */
90 { KE_KEY, 0xCE, { KEY_POWER } }, /* Press */
91 { KE_IGNORE, 0xCF, { KEY_POWER } }, /* Release */
92 { KE_END },
93 };
94
95 static const struct dmi_system_id button_array_table[] = {
96 {
97 .ident = "Wacom MobileStudio Pro 13",
98 .matches = {
99 DMI_MATCH(DMI_SYS_VENDOR, "Wacom Co.,Ltd"),
100 DMI_MATCH(DMI_PRODUCT_NAME, "Wacom MobileStudio Pro 13"),
101 },
102 },
103 {
104 .ident = "Wacom MobileStudio Pro 16",
105 .matches = {
106 DMI_MATCH(DMI_SYS_VENDOR, "Wacom Co.,Ltd"),
107 DMI_MATCH(DMI_PRODUCT_NAME, "Wacom MobileStudio Pro 16"),
108 },
109 },
110 {
111 .ident = "HP Spectre x2 (2015)",
112 .matches = {
113 DMI_MATCH(DMI_SYS_VENDOR, "HP"),
114 DMI_MATCH(DMI_PRODUCT_NAME, "HP Spectre x2 Detachable"),
115 },
116 },
117 {
118 .ident = "Lenovo ThinkPad X1 Tablet Gen 2",
119 .matches = {
120 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
121 DMI_MATCH(DMI_PRODUCT_FAMILY, "ThinkPad X1 Tablet Gen 2"),
122 },
123 },
124 {
125 .ident = "Microsoft Surface Go 3",
126 .matches = {
127 DMI_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"),
128 DMI_MATCH(DMI_PRODUCT_NAME, "Surface Go 3"),
129 },
130 },
131 {
132 .ident = "Microsoft Surface Go 4",
133 .matches = {
134 DMI_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"),
135 DMI_MATCH(DMI_PRODUCT_NAME, "Surface Go 4"),
136 },
137 },
138 { }
139 };
140
141 /*
142 * Some convertible use the intel-hid ACPI interface to report SW_TABLET_MODE,
143 * these need to be compared via a DMI based authorization list because some
144 * models have unreliable VGBS return which could cause incorrect
145 * SW_TABLET_MODE report.
146 */
147 static const struct dmi_system_id dmi_vgbs_allow_list[] = {
148 {
149 .matches = {
150 DMI_MATCH(DMI_SYS_VENDOR, "HP"),
151 DMI_MATCH(DMI_PRODUCT_NAME, "HP Spectre x360 Convertible 15-df0xxx"),
152 },
153 },
154 {
155 .matches = {
156 DMI_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"),
157 DMI_MATCH(DMI_PRODUCT_NAME, "Surface Go"),
158 },
159 },
160 {
161 .matches = {
162 DMI_MATCH(DMI_SYS_VENDOR, "HP"),
163 DMI_MATCH(DMI_PRODUCT_NAME, "HP Elite Dragonfly G2 Notebook PC"),
164 },
165 },
166 { }
167 };
168
169 /*
170 * Some devices, even non convertible ones, can send incorrect SW_TABLET_MODE
171 * reports. Accept such reports only from devices in this list.
172 */
173 static const struct dmi_system_id dmi_auto_add_switch[] = {
174 {
175 .matches = {
176 DMI_EXACT_MATCH(DMI_CHASSIS_TYPE, "31" /* Convertible */),
177 },
178 },
179 {
180 .matches = {
181 DMI_EXACT_MATCH(DMI_CHASSIS_TYPE, "32" /* Detachable */),
182 },
183 },
184 {} /* Array terminator */
185 };
186
187 struct intel_hid_priv {
188 struct input_dev *input_dev;
189 struct input_dev *array;
190 struct input_dev *switches;
191 bool wakeup_mode;
192 };
193
194 #define HID_EVENT_FILTER_UUID "eeec56b3-4442-408f-a792-4edd4d758054"
195
196 enum intel_hid_dsm_fn_codes {
197 INTEL_HID_DSM_FN_INVALID,
198 INTEL_HID_DSM_BTNL_FN,
199 INTEL_HID_DSM_HDMM_FN,
200 INTEL_HID_DSM_HDSM_FN,
201 INTEL_HID_DSM_HDEM_FN,
202 INTEL_HID_DSM_BTNS_FN,
203 INTEL_HID_DSM_BTNE_FN,
204 INTEL_HID_DSM_HEBC_V1_FN,
205 INTEL_HID_DSM_VGBS_FN,
206 INTEL_HID_DSM_HEBC_V2_FN,
207 INTEL_HID_DSM_FN_MAX
208 };
209
210 static const char *intel_hid_dsm_fn_to_method[INTEL_HID_DSM_FN_MAX] = {
211 NULL,
212 "BTNL",
213 "HDMM",
214 "HDSM",
215 "HDEM",
216 "BTNS",
217 "BTNE",
218 "HEBC",
219 "VGBS",
220 "HEBC"
221 };
222
223 static unsigned long long intel_hid_dsm_fn_mask;
224 static guid_t intel_dsm_guid;
225
intel_hid_execute_method(acpi_handle handle,enum intel_hid_dsm_fn_codes fn_index,unsigned long long arg)226 static bool intel_hid_execute_method(acpi_handle handle,
227 enum intel_hid_dsm_fn_codes fn_index,
228 unsigned long long arg)
229 {
230 union acpi_object *obj, argv4, req;
231 acpi_status status;
232 char *method_name;
233
234 if (fn_index <= INTEL_HID_DSM_FN_INVALID ||
235 fn_index >= INTEL_HID_DSM_FN_MAX)
236 return false;
237
238 method_name = (char *)intel_hid_dsm_fn_to_method[fn_index];
239
240 if (!(intel_hid_dsm_fn_mask & BIT(fn_index)))
241 goto skip_dsm_exec;
242
243 /* All methods expects a package with one integer element */
244 req.type = ACPI_TYPE_INTEGER;
245 req.integer.value = arg;
246
247 argv4.type = ACPI_TYPE_PACKAGE;
248 argv4.package.count = 1;
249 argv4.package.elements = &req;
250
251 obj = acpi_evaluate_dsm(handle, &intel_dsm_guid, 1, fn_index, &argv4);
252 if (obj) {
253 acpi_handle_debug(handle, "Exec DSM Fn code: %d[%s] success\n",
254 fn_index, method_name);
255 ACPI_FREE(obj);
256 return true;
257 }
258
259 skip_dsm_exec:
260 status = acpi_execute_simple_method(handle, method_name, arg);
261 if (ACPI_SUCCESS(status))
262 return true;
263
264 return false;
265 }
266
intel_hid_evaluate_method(acpi_handle handle,enum intel_hid_dsm_fn_codes fn_index,unsigned long long * result)267 static bool intel_hid_evaluate_method(acpi_handle handle,
268 enum intel_hid_dsm_fn_codes fn_index,
269 unsigned long long *result)
270 {
271 union acpi_object *obj;
272 acpi_status status;
273 char *method_name;
274
275 if (fn_index <= INTEL_HID_DSM_FN_INVALID ||
276 fn_index >= INTEL_HID_DSM_FN_MAX)
277 return false;
278
279 method_name = (char *)intel_hid_dsm_fn_to_method[fn_index];
280
281 if (!(intel_hid_dsm_fn_mask & BIT(fn_index)))
282 goto skip_dsm_eval;
283
284 obj = acpi_evaluate_dsm_typed(handle, &intel_dsm_guid,
285 1, fn_index,
286 NULL, ACPI_TYPE_INTEGER);
287 if (obj) {
288 *result = obj->integer.value;
289 acpi_handle_debug(handle,
290 "Eval DSM Fn code: %d[%s] results: 0x%llx\n",
291 fn_index, method_name, *result);
292 ACPI_FREE(obj);
293 return true;
294 }
295
296 skip_dsm_eval:
297 status = acpi_evaluate_integer(handle, method_name, NULL, result);
298 if (ACPI_SUCCESS(status))
299 return true;
300
301 return false;
302 }
303
intel_hid_init_dsm(acpi_handle handle)304 static void intel_hid_init_dsm(acpi_handle handle)
305 {
306 union acpi_object *obj;
307
308 guid_parse(HID_EVENT_FILTER_UUID, &intel_dsm_guid);
309
310 obj = acpi_evaluate_dsm_typed(handle, &intel_dsm_guid, 1, 0, NULL,
311 ACPI_TYPE_BUFFER);
312 if (obj) {
313 switch (obj->buffer.length) {
314 default:
315 case 2:
316 intel_hid_dsm_fn_mask = *(u16 *)obj->buffer.pointer;
317 break;
318 case 1:
319 intel_hid_dsm_fn_mask = *obj->buffer.pointer;
320 break;
321 case 0:
322 acpi_handle_warn(handle, "intel_hid_dsm_fn_mask length is zero\n");
323 intel_hid_dsm_fn_mask = 0;
324 break;
325 }
326 ACPI_FREE(obj);
327 }
328
329 acpi_handle_debug(handle, "intel_hid_dsm_fn_mask = %llx\n",
330 intel_hid_dsm_fn_mask);
331 }
332
intel_hid_set_enable(struct device * device,bool enable)333 static int intel_hid_set_enable(struct device *device, bool enable)
334 {
335 acpi_handle handle = ACPI_HANDLE(device);
336
337 /* Enable|disable features - power button is always enabled */
338 if (!intel_hid_execute_method(handle, INTEL_HID_DSM_HDSM_FN,
339 enable)) {
340 dev_warn(device, "failed to %sable hotkeys\n",
341 enable ? "en" : "dis");
342 return -EIO;
343 }
344
345 return 0;
346 }
347
intel_button_array_enable(struct device * device,bool enable)348 static void intel_button_array_enable(struct device *device, bool enable)
349 {
350 struct intel_hid_priv *priv = dev_get_drvdata(device);
351 acpi_handle handle = ACPI_HANDLE(device);
352 unsigned long long button_cap;
353 acpi_status status;
354
355 if (!priv->array)
356 return;
357
358 /* Query supported platform features */
359 status = acpi_evaluate_integer(handle, "BTNC", NULL, &button_cap);
360 if (ACPI_FAILURE(status)) {
361 dev_warn(device, "failed to get button capability\n");
362 return;
363 }
364
365 /* Enable|disable features - power button is always enabled */
366 if (!intel_hid_execute_method(handle, INTEL_HID_DSM_BTNE_FN,
367 enable ? button_cap : 1))
368 dev_warn(device, "failed to set button capability\n");
369 }
370
intel_hid_pm_prepare(struct device * device)371 static int intel_hid_pm_prepare(struct device *device)
372 {
373 if (device_may_wakeup(device)) {
374 struct intel_hid_priv *priv = dev_get_drvdata(device);
375
376 priv->wakeup_mode = true;
377 }
378 return 0;
379 }
380
intel_hid_pm_complete(struct device * device)381 static void intel_hid_pm_complete(struct device *device)
382 {
383 struct intel_hid_priv *priv = dev_get_drvdata(device);
384
385 priv->wakeup_mode = false;
386 }
387
intel_hid_pl_suspend_handler(struct device * device)388 static int intel_hid_pl_suspend_handler(struct device *device)
389 {
390 intel_button_array_enable(device, false);
391
392 if (!pm_suspend_no_platform())
393 intel_hid_set_enable(device, false);
394
395 return 0;
396 }
397
intel_hid_pl_resume_handler(struct device * device)398 static int intel_hid_pl_resume_handler(struct device *device)
399 {
400 intel_hid_pm_complete(device);
401
402 if (!pm_suspend_no_platform())
403 intel_hid_set_enable(device, true);
404
405 intel_button_array_enable(device, true);
406 return 0;
407 }
408
409 static const struct dev_pm_ops intel_hid_pl_pm_ops = {
410 .prepare = intel_hid_pm_prepare,
411 .complete = intel_hid_pm_complete,
412 .freeze = intel_hid_pl_suspend_handler,
413 .thaw = intel_hid_pl_resume_handler,
414 .restore = intel_hid_pl_resume_handler,
415 .suspend = intel_hid_pl_suspend_handler,
416 .resume = intel_hid_pl_resume_handler,
417 };
418
intel_hid_input_setup(struct platform_device * device)419 static int intel_hid_input_setup(struct platform_device *device)
420 {
421 struct intel_hid_priv *priv = dev_get_drvdata(&device->dev);
422 int ret;
423
424 priv->input_dev = devm_input_allocate_device(&device->dev);
425 if (!priv->input_dev)
426 return -ENOMEM;
427
428 ret = sparse_keymap_setup(priv->input_dev, intel_hid_keymap, NULL);
429 if (ret)
430 return ret;
431
432 priv->input_dev->name = "Intel HID events";
433 priv->input_dev->id.bustype = BUS_HOST;
434
435 return input_register_device(priv->input_dev);
436 }
437
intel_button_array_input_setup(struct platform_device * device)438 static int intel_button_array_input_setup(struct platform_device *device)
439 {
440 struct intel_hid_priv *priv = dev_get_drvdata(&device->dev);
441 int ret;
442
443 /* Setup input device for 5 button array */
444 priv->array = devm_input_allocate_device(&device->dev);
445 if (!priv->array)
446 return -ENOMEM;
447
448 ret = sparse_keymap_setup(priv->array, intel_array_keymap, NULL);
449 if (ret)
450 return ret;
451
452 priv->array->name = "Intel HID 5 button array";
453 priv->array->id.bustype = BUS_HOST;
454
455 return input_register_device(priv->array);
456 }
457
intel_hid_switches_setup(struct platform_device * device)458 static int intel_hid_switches_setup(struct platform_device *device)
459 {
460 struct intel_hid_priv *priv = dev_get_drvdata(&device->dev);
461
462 /* Setup input device for switches */
463 priv->switches = devm_input_allocate_device(&device->dev);
464 if (!priv->switches)
465 return -ENOMEM;
466
467 __set_bit(EV_SW, priv->switches->evbit);
468 __set_bit(SW_TABLET_MODE, priv->switches->swbit);
469
470 priv->switches->name = "Intel HID switches";
471 priv->switches->id.bustype = BUS_HOST;
472 return input_register_device(priv->switches);
473 }
474
report_tablet_mode_state(struct platform_device * device)475 static void report_tablet_mode_state(struct platform_device *device)
476 {
477 struct intel_hid_priv *priv = dev_get_drvdata(&device->dev);
478 acpi_handle handle = ACPI_HANDLE(&device->dev);
479 unsigned long long vgbs;
480 int m;
481
482 if (!intel_hid_evaluate_method(handle, INTEL_HID_DSM_VGBS_FN, &vgbs))
483 return;
484
485 m = !(vgbs & TABLET_MODE_FLAG);
486 input_report_switch(priv->switches, SW_TABLET_MODE, m);
487 input_sync(priv->switches);
488 }
489
report_tablet_mode_event(struct input_dev * input_dev,u32 event)490 static bool report_tablet_mode_event(struct input_dev *input_dev, u32 event)
491 {
492 if (!input_dev)
493 return false;
494
495 switch (event) {
496 case 0xcc:
497 input_report_switch(input_dev, SW_TABLET_MODE, 1);
498 input_sync(input_dev);
499 return true;
500 case 0xcd:
501 input_report_switch(input_dev, SW_TABLET_MODE, 0);
502 input_sync(input_dev);
503 return true;
504 default:
505 return false;
506 }
507 }
508
notify_handler(acpi_handle handle,u32 event,void * context)509 static void notify_handler(acpi_handle handle, u32 event, void *context)
510 {
511 struct platform_device *device = context;
512 struct intel_hid_priv *priv = dev_get_drvdata(&device->dev);
513 unsigned long long ev_index;
514 int err;
515
516 /*
517 * Some convertible have unreliable VGBS return which could cause incorrect
518 * SW_TABLET_MODE report, in these cases we enable support when receiving
519 * the first event instead of during driver setup.
520 */
521 if (!priv->switches && enable_sw_tablet_mode == TABLET_SW_AT_EVENT &&
522 (event == 0xcc || event == 0xcd)) {
523 dev_info(&device->dev, "switch event received, enable switches supports\n");
524 err = intel_hid_switches_setup(device);
525 if (err)
526 pr_err("Failed to setup Intel HID switches\n");
527 }
528
529 if (priv->wakeup_mode) {
530 /*
531 * Needed for wakeup from suspend-to-idle to work on some
532 * platforms that don't expose the 5-button array, but still
533 * send notifies with the power button event code to this
534 * device object on power button actions while suspended.
535 */
536 if (event == 0xce)
537 goto wakeup;
538
539 /*
540 * Some devices send (duplicate) tablet-mode events when moved
541 * around even though the mode has not changed; and they do this
542 * even when suspended.
543 * Update the switch state in case it changed and then return
544 * without waking up to avoid spurious wakeups.
545 */
546 if (event == 0xcc || event == 0xcd) {
547 report_tablet_mode_event(priv->switches, event);
548 return;
549 }
550
551 /* Wake up on 5-button array events only. */
552 if (event == 0xc0 || !priv->array)
553 return;
554
555 if (!sparse_keymap_entry_from_scancode(priv->array, event)) {
556 dev_info(&device->dev, "unknown event 0x%x\n", event);
557 return;
558 }
559
560 wakeup:
561 pm_wakeup_hard_event(&device->dev);
562
563 return;
564 }
565
566 /*
567 * Needed for suspend to work on some platforms that don't expose
568 * the 5-button array, but still send notifies with power button
569 * event code to this device object on power button actions.
570 *
571 * Report the power button press and release.
572 */
573 if (!priv->array) {
574 if (event == 0xce) {
575 input_report_key(priv->input_dev, KEY_POWER, 1);
576 input_sync(priv->input_dev);
577 return;
578 }
579
580 if (event == 0xcf) {
581 input_report_key(priv->input_dev, KEY_POWER, 0);
582 input_sync(priv->input_dev);
583 return;
584 }
585 }
586
587 if (report_tablet_mode_event(priv->switches, event))
588 return;
589
590 /* 0xC0 is for HID events, other values are for 5 button array */
591 if (event != 0xc0) {
592 if (!priv->array ||
593 !sparse_keymap_report_event(priv->array, event, 1, true))
594 dev_dbg(&device->dev, "unknown event 0x%x\n", event);
595 return;
596 }
597
598 if (!intel_hid_evaluate_method(handle, INTEL_HID_DSM_HDEM_FN,
599 &ev_index)) {
600 dev_warn(&device->dev, "failed to get event index\n");
601 return;
602 }
603
604 if (!sparse_keymap_report_event(priv->input_dev, ev_index, 1, true))
605 dev_dbg(&device->dev, "unknown event index 0x%llx\n",
606 ev_index);
607 }
608
button_array_present(struct platform_device * device)609 static bool button_array_present(struct platform_device *device)
610 {
611 acpi_handle handle = ACPI_HANDLE(&device->dev);
612 unsigned long long event_cap;
613
614 if (intel_hid_evaluate_method(handle, INTEL_HID_DSM_HEBC_V2_FN,
615 &event_cap)) {
616 /* Check presence of 5 button array or v2 power button */
617 if (event_cap & 0x60000)
618 return true;
619 }
620
621 if (intel_hid_evaluate_method(handle, INTEL_HID_DSM_HEBC_V1_FN,
622 &event_cap)) {
623 if (event_cap & 0x20000)
624 return true;
625 }
626
627 if (enable_5_button_array || dmi_check_system(button_array_table))
628 return true;
629
630 return false;
631 }
632
intel_hid_probe(struct platform_device * device)633 static int intel_hid_probe(struct platform_device *device)
634 {
635 acpi_handle handle = ACPI_HANDLE(&device->dev);
636 unsigned long long mode, dummy;
637 struct intel_hid_priv *priv;
638 acpi_status status;
639 int err;
640
641 intel_hid_init_dsm(handle);
642
643 if (!intel_hid_evaluate_method(handle, INTEL_HID_DSM_HDMM_FN, &mode)) {
644 dev_warn(&device->dev, "failed to read mode\n");
645 return -ENODEV;
646 }
647
648 if (mode != 0) {
649 /*
650 * This driver only implements "simple" mode. There appear
651 * to be no other modes, but we should be paranoid and check
652 * for compatibility.
653 */
654 dev_info(&device->dev, "platform is not in simple mode\n");
655 return -ENODEV;
656 }
657
658 priv = devm_kzalloc(&device->dev, sizeof(*priv), GFP_KERNEL);
659 if (!priv)
660 return -ENOMEM;
661 dev_set_drvdata(&device->dev, priv);
662
663 /* See dual_accel_detect.h for more info on the dual_accel check. */
664 if (enable_sw_tablet_mode == TABLET_SW_AUTO) {
665 if (dmi_check_system(dmi_vgbs_allow_list))
666 enable_sw_tablet_mode = TABLET_SW_AT_PROBE;
667 else if (dmi_check_system(dmi_auto_add_switch) && !dual_accel_detect())
668 enable_sw_tablet_mode = TABLET_SW_AT_EVENT;
669 else
670 enable_sw_tablet_mode = TABLET_SW_OFF;
671 }
672
673 err = intel_hid_input_setup(device);
674 if (err) {
675 pr_err("Failed to setup Intel HID hotkeys\n");
676 return err;
677 }
678
679 /* Setup 5 button array */
680 if (button_array_present(device)) {
681 dev_info(&device->dev, "platform supports 5 button array\n");
682 err = intel_button_array_input_setup(device);
683 if (err)
684 pr_err("Failed to setup Intel 5 button array hotkeys\n");
685 }
686
687 /* Setup switches for devices that we know VGBS return correctly */
688 if (enable_sw_tablet_mode == TABLET_SW_AT_PROBE) {
689 dev_info(&device->dev, "platform supports switches\n");
690 err = intel_hid_switches_setup(device);
691 if (err)
692 pr_err("Failed to setup Intel HID switches\n");
693 else
694 report_tablet_mode_state(device);
695 }
696
697 status = acpi_install_notify_handler(handle,
698 ACPI_DEVICE_NOTIFY,
699 notify_handler,
700 device);
701 if (ACPI_FAILURE(status))
702 return -EBUSY;
703
704 err = intel_hid_set_enable(&device->dev, true);
705 if (err)
706 goto err_remove_notify;
707
708 intel_button_array_enable(&device->dev, true);
709
710 /*
711 * Call button load method to enable HID power button
712 * Always do this since it activates events on some devices without
713 * a button array too.
714 */
715 if (!intel_hid_evaluate_method(handle, INTEL_HID_DSM_BTNL_FN, &dummy))
716 dev_warn(&device->dev, "failed to enable HID power button\n");
717
718 device_init_wakeup(&device->dev, true);
719 /*
720 * In order for system wakeup to work, the EC GPE has to be marked as
721 * a wakeup one, so do that here (this setting will persist, but it has
722 * no effect until the wakeup mask is set for the EC GPE).
723 */
724 acpi_ec_mark_gpe_for_wake();
725 return 0;
726
727 err_remove_notify:
728 acpi_remove_notify_handler(handle, ACPI_DEVICE_NOTIFY, notify_handler);
729
730 return err;
731 }
732
intel_hid_remove(struct platform_device * device)733 static void intel_hid_remove(struct platform_device *device)
734 {
735 acpi_handle handle = ACPI_HANDLE(&device->dev);
736
737 device_init_wakeup(&device->dev, false);
738 acpi_remove_notify_handler(handle, ACPI_DEVICE_NOTIFY, notify_handler);
739 intel_hid_set_enable(&device->dev, false);
740 intel_button_array_enable(&device->dev, false);
741 }
742
743 static struct platform_driver intel_hid_pl_driver = {
744 .driver = {
745 .name = "intel-hid",
746 .acpi_match_table = intel_hid_ids,
747 .pm = &intel_hid_pl_pm_ops,
748 },
749 .probe = intel_hid_probe,
750 .remove_new = intel_hid_remove,
751 };
752
753 /*
754 * Unfortunately, some laptops provide a _HID="INT33D5" device with
755 * _CID="PNP0C02". This causes the pnpacpi scan driver to claim the
756 * ACPI node, so no platform device will be created. The pnpacpi
757 * driver rejects this device in subsequent processing, so no physical
758 * node is created at all.
759 *
760 * As a workaround until the ACPI core figures out how to handle
761 * this corner case, manually ask the ACPI platform device code to
762 * claim the ACPI node.
763 */
764 static acpi_status __init
check_acpi_dev(acpi_handle handle,u32 lvl,void * context,void ** rv)765 check_acpi_dev(acpi_handle handle, u32 lvl, void *context, void **rv)
766 {
767 const struct acpi_device_id *ids = context;
768 struct acpi_device *dev = acpi_fetch_acpi_dev(handle);
769
770 if (dev && acpi_match_device_ids(dev, ids) == 0)
771 if (!IS_ERR_OR_NULL(acpi_create_platform_device(dev, NULL)))
772 dev_info(&dev->dev,
773 "intel-hid: created platform device\n");
774
775 return AE_OK;
776 }
777
intel_hid_init(void)778 static int __init intel_hid_init(void)
779 {
780 acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
781 ACPI_UINT32_MAX, check_acpi_dev, NULL,
782 (void *)intel_hid_ids, NULL);
783
784 return platform_driver_register(&intel_hid_pl_driver);
785 }
786 module_init(intel_hid_init);
787
intel_hid_exit(void)788 static void __exit intel_hid_exit(void)
789 {
790 platform_driver_unregister(&intel_hid_pl_driver);
791 }
792 module_exit(intel_hid_exit);
793