platform/x86/dell-wmi.c

1 // SPDX-License-Identifier: GPL-2.0-or-later
6  * Copyright (C) 2014-2015 Pali Rohár <pali@kernel.org>
22 #include <linux/input/sparse-keymap.h>
28 #include "dell-smbios.h"
29 #include "dell-wmi-descriptor.h"
36 #define DELL_EVENT_GUID "9DBB5994-A997-11DA-B012-B622A1EF5492"
72  * Keymap for WMI events of type 0x0000
157 	 * Originally Matthew Garrett created this dell-wmi driver specially for
188 	struct dell_bios_keymap_entry keymap[];  member
195 	struct key_entry *keymap;  member
243  * Keymap for WMI events of type 0x0010
249 	/* Fn-lock switched to function keys */
252 	/* Fn-lock switched to multimedia keys */
265 	/* Fn-lock */
272 	 * Radio disable (notify only -- there is no model for which the
283 	 * a notification. On the XPS 13 9350, this is Fn+F7, and there's
298 	 * Radio disable (notify only -- there is no model for which the
303 	/* Fn-lock */
308  * Keymap for WMI events of type 0x0011
338  * Keymap for WMI events of type 0x0012
342 	/* Fn-lock button pressed */
348 	struct dell_wmi_priv *priv = dev_get_drvdata(&wdev->dev);  in dell_wmi_process_key()
351 	key = sparse_keymap_entry_from_scancode(priv->input_dev,  in dell_wmi_process_key()
362 	if ((key->keycode == KEY_BRIGHTNESSUP ||  in dell_wmi_process_key()
363 	     key->keycode == KEY_BRIGHTNESSDOWN) &&  in dell_wmi_process_key()
370 	if (key->keycode == KEY_KBDILLUMTOGGLE)  in dell_wmi_process_key()
374 	sparse_keymap_report_entry(priv->input_dev, key, 1, true);  in dell_wmi_process_key()
380 	struct dell_wmi_priv *priv = dev_get_drvdata(&wdev->dev);  in dell_wmi_notify()
385 	if (obj->type != ACPI_TYPE_BUFFER) {  in dell_wmi_notify()
386 		pr_warn("bad response type %x\n", obj->type);  in dell_wmi_notify()
391 		obj->buffer.length, obj->buffer.pointer);  in dell_wmi_notify()
393 	buffer_entry = (u16 *)obj->buffer.pointer;  in dell_wmi_notify()
394 	buffer_size = obj->buffer.length/2;  in dell_wmi_notify()
409 	if (priv->interface_version == 0 && buffer_entry < buffer_end)  in dell_wmi_notify()
454 static bool have_scancode(u32 scancode, const struct key_entry *keymap, int len)  in have_scancode()  argument
459 		if (keymap[i].code == scancode)  in have_scancode()
470 	struct key_entry *keymap;  in handle_dmi_entry()  local
472 	if (results->err || results->keymap)  in handle_dmi_entry()
476 	if (dm->type != 0xb2)  in handle_dmi_entry()
481 	hotkey_num = (table->header.length -  in handle_dmi_entry()
486 		 * Historically, dell-wmi would ignore a DMI entry of  in handle_dmi_entry()
495 	keymap = kcalloc(hotkey_num, sizeof(struct key_entry), GFP_KERNEL);  in handle_dmi_entry()
496 	if (!keymap) {  in handle_dmi_entry()
497 		results->err = -ENOMEM;  in handle_dmi_entry()
503 					&table->keymap[i];  in handle_dmi_entry()
506 		u16 keycode = (bios_entry->keycode <  in handle_dmi_entry()
508 			bios_to_linux_keycode[bios_entry->keycode] :  in handle_dmi_entry()
509 			(bios_entry->keycode == 0xffff ? KEY_UNKNOWN : KEY_RESERVED);  in handle_dmi_entry()
518 				bios_entry->scancode, bios_entry->keycode);  in handle_dmi_entry()
523 			keymap[pos].type = KE_IGNORE;  in handle_dmi_entry()
525 			keymap[pos].type = KE_KEY;  in handle_dmi_entry()
526 		keymap[pos].code = bios_entry->scancode;  in handle_dmi_entry()
527 		keymap[pos].keycode = keycode;  in handle_dmi_entry()
532 	results->keymap = keymap;  in handle_dmi_entry()
533 	results->keymap_size = pos;  in handle_dmi_entry()
538 	struct dell_wmi_priv *priv = dev_get_drvdata(&wdev->dev);  in dell_wmi_input_setup()
540 	struct key_entry *keymap;  in dell_wmi_input_setup()  local
543 	priv->input_dev = input_allocate_device();  in dell_wmi_input_setup()
544 	if (!priv->input_dev)  in dell_wmi_input_setup()
545 		return -ENOMEM;  in dell_wmi_input_setup()
547 	priv->input_dev->name = "Dell WMI hotkeys";  in dell_wmi_input_setup()
548 	priv->input_dev->id.bustype = BUS_HOST;  in dell_wmi_input_setup()
549 	priv->input_dev->dev.parent = &wdev->dev;  in dell_wmi_input_setup()
553 		 * Historically, dell-wmi ignored dmi_walk errors.  A failure  in dell_wmi_input_setup()
557 		pr_warn("no DMI; using the old-style hotkey interface\n");  in dell_wmi_input_setup()
565 	keymap = kcalloc(dmi_results.keymap_size +  in dell_wmi_input_setup()
572 	if (!keymap) {  in dell_wmi_input_setup()
573 		kfree(dmi_results.keymap);  in dell_wmi_input_setup()
574 		err = -ENOMEM;  in dell_wmi_input_setup()
580 		keymap[pos] = dmi_results.keymap[i];  in dell_wmi_input_setup()
581 		keymap[pos].code |= (0x0010 << 16);  in dell_wmi_input_setup()
585 	kfree(dmi_results.keymap);  in dell_wmi_input_setup()
597 		    have_scancode(entry->code | (0x0010 << 16),  in dell_wmi_input_setup()
598 				  keymap, dmi_results.keymap_size)  in dell_wmi_input_setup()
602 		keymap[pos] = *entry;  in dell_wmi_input_setup()
603 		keymap[pos].code |= (0x0010 << 16);  in dell_wmi_input_setup()
609 		keymap[pos] = dell_wmi_keymap_type_0011[i];  in dell_wmi_input_setup()
610 		keymap[pos].code |= (0x0011 << 16);  in dell_wmi_input_setup()
616 		keymap[pos] = dell_wmi_keymap_type_0012[i];  in dell_wmi_input_setup()
617 		keymap[pos].code |= (0x0012 << 16);  in dell_wmi_input_setup()
626 		keymap[pos] = dell_wmi_keymap_type_0000[i];  in dell_wmi_input_setup()
630 	keymap[pos].type = KE_END;  in dell_wmi_input_setup()
632 	err = sparse_keymap_setup(priv->input_dev, keymap, NULL);  in dell_wmi_input_setup()
634 	 * Sparse keymap library makes a copy of keymap so we don't need the  in dell_wmi_input_setup()
637 	kfree(keymap);  in dell_wmi_input_setup()
641 	err = input_register_device(priv->input_dev);  in dell_wmi_input_setup()
648 	input_free_device(priv->input_dev);  in dell_wmi_input_setup()
654 	struct dell_wmi_priv *priv = dev_get_drvdata(&wdev->dev);  in dell_wmi_input_destroy()
656 	input_unregister_device(priv->input_dev);  in dell_wmi_input_destroy()
672  *     cbRes1 Standard return codes (0, -1, -2)
682 		return -ENOMEM;  in dell_wmi_events_set_enabled()
683 	buffer->cmd_class = CLASS_INFO;  in dell_wmi_events_set_enabled()
684 	buffer->cmd_select = SELECT_APP_REGISTRATION;  in dell_wmi_events_set_enabled()
685 	buffer->input[0] = 0x10000;  in dell_wmi_events_set_enabled()
686 	buffer->input[1] = 0x51534554;  in dell_wmi_events_set_enabled()
687 	buffer->input[3] = enable;  in dell_wmi_events_set_enabled()
690 		ret = buffer->output[0];  in dell_wmi_events_set_enabled()
706 		&wdev->dev, sizeof(struct dell_wmi_priv), GFP_KERNEL);  in dell_wmi_probe()
708 		return -ENOMEM;  in dell_wmi_probe()
709 	dev_set_drvdata(&wdev->dev, priv);  in dell_wmi_probe()
711 	if (!dell_wmi_get_interface_version(&priv->interface_version))  in dell_wmi_probe()
712 		return -EPROBE_DEFER;  in dell_wmi_probe()
729 		.name = "dell-wmi",