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"
30 #include "dell-wmi-privacy.h"
37 #define DELL_EVENT_GUID "9DBB5994-A997-11DA-B012-B622A1EF5492"
83 	/* Meta key lock */
86 	/* Meta key unlock */
89 	/* Key code is followed by brightness level */
96 	/* Radio devices state change, key code is followed by other values */
101 	/* Key code is followed by: next, active and attached devices */
104 	/* Key code is followed by keyboard illumination level */
124 	/* Untested, Dell Instant Launch key on Inspiron 7520 */
127 	/* Dell Instant Launch key */
130 	/* Audio panel key */
133 	/* LCD Display On/Off Control key */
136 	/* Untested, Multimedia key on Dell Vostro 3560 */
139 	/* Dell Instant Launch key */
165 	 * Originally Matthew Garrett created this dell-wmi driver specially for
166 	 * "button with a picture of a battery" which has event code 0xe045.
167 	 * Later Mario Limonciello from Dell told us that event code 0xe045 is
168 	 * reported by Num Lock and should be ignored because key is send also
171 	 * Num Lock key press.
181 	/* Dell Support Center key */
257 	/* Fn-lock switched to function keys */
260 	/* Fn-lock switched to multimedia keys */
285 	/* Fn-lock */
292 	 * Radio disable (notify only -- there is no model for which the
318 	 * Radio disable (notify only -- there is no model for which the
323 	/* Fn-lock */
368 	/* Ultra-performance mode switch request */
371 	/* Fn-lock button pressed */
387 		__set_bit(EV_SW, (dev)->evbit);  in dell_wmi_switch_event()
388 		__set_bit(switchid, (dev)->swbit);  in dell_wmi_switch_event()
390 		(dev)->name = devname;  in dell_wmi_switch_event()
391 		(dev)->id.bustype = BUS_HOST;  in dell_wmi_switch_event()
404 static int dell_wmi_process_key(struct wmi_device *wdev, int type, int code, u16 *buffer, int remai…  in dell_wmi_process_key()  argument
406 	struct dell_wmi_priv *priv = dev_get_drvdata(&wdev->dev);  in dell_wmi_process_key()
407 	const struct key_entry *key;  in dell_wmi_process_key()  local
411 	key = sparse_keymap_entry_from_scancode(priv->input_dev,  in dell_wmi_process_key()
412 						(type << 16) | code);  in dell_wmi_process_key()
413 	if (!key) {  in dell_wmi_process_key()
414 		pr_info("Unknown key with type 0x%04x and code 0x%04x pressed\n",  in dell_wmi_process_key()
415 			type, code);  in dell_wmi_process_key()
419 	pr_debug("Key with type 0x%04x and code 0x%04x pressed\n", type, code);  in dell_wmi_process_key()
422 	if ((key->keycode == KEY_BRIGHTNESSUP ||  in dell_wmi_process_key()
423 	     key->keycode == KEY_BRIGHTNESSDOWN) &&  in dell_wmi_process_key()
427 	if (type == 0x0000 && code == 0xe025 && !wmi_requires_smbios_request)  in dell_wmi_process_key()
430 	if (key->keycode == KEY_KBDILLUMTOGGLE) {  in dell_wmi_process_key()
433 	} else if (type == 0x0011 && code == 0xe070 && remaining > 0) {  in dell_wmi_process_key()
434 		dell_wmi_switch_event(&priv->tabletswitch_dev,  in dell_wmi_process_key()
438 	} else if (type == 0x0012 && code == 0x000d && remaining > 0) {  in dell_wmi_process_key()
443 	sparse_keymap_report_entry(priv->input_dev, key, value, true);  in dell_wmi_process_key()
451 	struct dell_wmi_priv *priv = dev_get_drvdata(&wdev->dev);  in dell_wmi_notify()
456 	if (obj->type != ACPI_TYPE_BUFFER) {  in dell_wmi_notify()
457 		pr_warn("bad response type %x\n", obj->type);  in dell_wmi_notify()
462 		obj->buffer.length, obj->buffer.pointer);  in dell_wmi_notify()
464 	buffer_entry = (u16 *)obj->buffer.pointer;  in dell_wmi_notify()
465 	buffer_size = obj->buffer.length/2;  in dell_wmi_notify()
480 	if (priv->interface_version == 0 && buffer_entry < buffer_end)  in dell_wmi_notify()
500 		case 0x0000: /* One key pressed or event occurred */  in dell_wmi_notify()
505 						     len - 3);  in dell_wmi_notify()
514 							  len - i - 1);  in dell_wmi_notify()
522 						     buffer_entry + 3, len - 3);  in dell_wmi_notify()
541 		if (keymap[i].code == scancode)  in have_scancode()
554 	if (results->err || results->keymap)  in handle_dmi_entry()
558 	if (dm->type != 0xb2)  in handle_dmi_entry()
563 	hotkey_num = (table->header.length -  in handle_dmi_entry()
568 		 * Historically, dell-wmi would ignore a DMI entry of  in handle_dmi_entry()
579 		results->err = -ENOMEM;  in handle_dmi_entry()
585 					&table->keymap[i];  in handle_dmi_entry()
588 		u16 keycode = (bios_entry->keycode <  in handle_dmi_entry()
590 			bios_to_linux_keycode[bios_entry->keycode] :  in handle_dmi_entry()
591 			(bios_entry->keycode == 0xffff ? KEY_UNKNOWN : KEY_RESERVED);  in handle_dmi_entry()
600 				bios_entry->scancode, bios_entry->keycode);  in handle_dmi_entry()
608 		keymap[pos].code = bios_entry->scancode;  in handle_dmi_entry()
614 	results->keymap = keymap;  in handle_dmi_entry()
615 	results->keymap_size = pos;  in handle_dmi_entry()
620 	struct dell_wmi_priv *priv = dev_get_drvdata(&wdev->dev);  in dell_wmi_input_setup()
625 	priv->input_dev = input_allocate_device();  in dell_wmi_input_setup()
626 	if (!priv->input_dev)  in dell_wmi_input_setup()
627 		return -ENOMEM;  in dell_wmi_input_setup()
629 	priv->input_dev->name = "Dell WMI hotkeys";  in dell_wmi_input_setup()
630 	priv->input_dev->id.bustype = BUS_HOST;  in dell_wmi_input_setup()
631 	priv->input_dev->dev.parent = &wdev->dev;  in dell_wmi_input_setup()
635 		 * Historically, dell-wmi ignored dmi_walk errors.  A failure  in dell_wmi_input_setup()
639 		pr_warn("no DMI; using the old-style hotkey interface\n");  in dell_wmi_input_setup()
656 		err = -ENOMEM;  in dell_wmi_input_setup()
663 		keymap[pos].code |= (0x0010 << 16);  in dell_wmi_input_setup()
679 		    have_scancode(entry->code | (0x0010 << 16),  in dell_wmi_input_setup()
685 		keymap[pos].code |= (0x0010 << 16);  in dell_wmi_input_setup()
692 		keymap[pos].code |= (0x0011 << 16);  in dell_wmi_input_setup()
699 		keymap[pos].code |= (0x0012 << 16);  in dell_wmi_input_setup()
714 	err = sparse_keymap_setup(priv->input_dev, keymap, NULL);  in dell_wmi_input_setup()
723 	err = input_register_device(priv->input_dev);  in dell_wmi_input_setup()
730 	input_free_device(priv->input_dev);  in dell_wmi_input_setup()
736 	struct dell_wmi_priv *priv = dev_get_drvdata(&wdev->dev);  in dell_wmi_input_destroy()
738 	input_unregister_device(priv->input_dev);  in dell_wmi_input_destroy()
739 	if (priv->tabletswitch_dev)  in dell_wmi_input_destroy()
740 		input_unregister_device(priv->tabletswitch_dev);  in dell_wmi_input_destroy()
756  *     cbRes1 Standard return codes (0, -1, -2)
766 		return -ENOMEM;  in dell_wmi_events_set_enabled()
767 	buffer->cmd_class = CLASS_INFO;  in dell_wmi_events_set_enabled()
768 	buffer->cmd_select = SELECT_APP_REGISTRATION;  in dell_wmi_events_set_enabled()
769 	buffer->input[0] = 0x10000;  in dell_wmi_events_set_enabled()
770 	buffer->input[1] = 0x51534554;  in dell_wmi_events_set_enabled()
771 	buffer->input[3] = enable;  in dell_wmi_events_set_enabled()
774 		ret = buffer->output[0];  in dell_wmi_events_set_enabled()
790 		&wdev->dev, sizeof(struct dell_wmi_priv), GFP_KERNEL);  in dell_wmi_probe()
792 		return -ENOMEM;  in dell_wmi_probe()
793 	dev_set_drvdata(&wdev->dev, priv);  in dell_wmi_probe()
795 	if (!dell_wmi_get_interface_version(&priv->interface_version))  in dell_wmi_probe()
796 		return -EPROBE_DEFER;  in dell_wmi_probe()
812 		.name = "dell-wmi",