1 // SPDX-License-Identifier: GPL-2.0
3  *  Generic Loongson processor based LAPTOP/ALL-IN-ONE driver
5  *  Jianmin Lv <lvjianmin@loongson.cn>
6  *  Huacai Chen <chenhuacai@loongson.cn>
8  * Copyright (C) 2022 Loongson Technology Corporation Limited
20 #include <linux/input/sparse-keymap.h>
26 /* 1. Driver-wide structs and misc. variables */
32 #define ACPI_LAPTOP_NAME "loongson-laptop"
33 #define ACPI_LAPTOP_ACPI_EVENT_PREFIX "loongson"
82 		quiet = 1;  in acpi_evalf()
94 		char c = *(fmt++);  in acpi_evalf()  local
95 		switch (c) {  in acpi_evalf()
102 			pr_err("acpi_evalf() called with invalid format character '%c'\n", c);  in acpi_evalf()
129 		pr_err("acpi_evalf() called with invalid format character '%c'\n", res_type);  in acpi_evalf()
143 		return -EIO;  in hotkey_status_get()
152 	if (!sub_driver || !sub_driver->notify)  in dispatch_acpi_notify()
154 	sub_driver->notify(sub_driver, event);  in dispatch_acpi_notify()
161 	if (!*sub_driver->handle)  in setup_acpi_notify()
164 	sub_driver->device = acpi_fetch_acpi_dev(*sub_driver->handle);  in setup_acpi_notify()
165 	if (!sub_driver->device) {  in setup_acpi_notify()
166 		pr_err("acpi_fetch_acpi_dev(%s) failed\n", sub_driver->name);  in setup_acpi_notify()
167 		return -ENODEV;  in setup_acpi_notify()
170 	sub_driver->device->driver_data = sub_driver;  in setup_acpi_notify()
171 	sprintf(acpi_device_class(sub_driver->device), "%s/%s",  in setup_acpi_notify()
172 		ACPI_LAPTOP_ACPI_EVENT_PREFIX, sub_driver->name);  in setup_acpi_notify()
174 	status = acpi_install_notify_handler(*sub_driver->handle,  in setup_acpi_notify()
175 			sub_driver->type, dispatch_acpi_notify, sub_driver);  in setup_acpi_notify()
179 				  "handling %s events\n", sub_driver->name);  in setup_acpi_notify()
182 			       sub_driver->name, acpi_format_exception(status));  in setup_acpi_notify()
184 		return -ENODEV;  in setup_acpi_notify()
186 	sub_driver->acpi_notify_installed = 1;  in setup_acpi_notify()
206 		pr_info("Loongson_backlight: resume brightness %d\n", bd->props.brightness);  in loongson_hotkey_resume()
213 	if (test_bit(SW_LID, generic_inputdev->swbit)) {  in loongson_hotkey_resume()
215 			return -EIO;  in loongson_hotkey_resume()
218 		 * When the system is awakened by other wake-up sources,  in loongson_hotkey_resume()
230 		if (test_bit(SW_LID, generic_inputdev->sw) && !(status & (1 << SW_LID))) {  in loongson_hotkey_resume()
234 			sparse_keymap_report_entry(generic_inputdev, &ke, 1, true);  in loongson_hotkey_resume()
246 	hotkey_handle = ACPI_HANDLE(&pdev->dev);  in loongson_hotkey_probe()
249 		return -ENODEV;  in loongson_hotkey_probe()
263 		.name	= "loongson-hotkey",
281 		return -1;  in hotkey_map()
284 	for (index = 0; index < pack->package.count; index++) {  in hotkey_map()
287 		sub_pack = &pack->package.elements[index];  in hotkey_map()
289 		element = &sub_pack->package.elements[0];  in hotkey_map()
290 		hotkey_keycode_map[index].type = element->integer.value;  in hotkey_map()
291 		element = &sub_pack->package.elements[1];  in hotkey_map()
292 		hotkey_keycode_map[index].code = element->integer.value;  in hotkey_map()
293 		element = &sub_pack->package.elements[2];  in hotkey_map()
294 		hotkey_keycode_map[index].keycode = element->integer.value;  in hotkey_map()
302 	if (!acpi_evalf(hotkey_handle, NULL, "VCBL", "vd", enable ? 1 : 0))  in hotkey_backlight_set()
303 		return -EIO;  in hotkey_backlight_set()
313 		return -ENXIO;  in ec_get_brightness()
316 		return -EIO;  in ec_get_brightness()
327 		return -ENXIO;  in ec_set_brightness()
330 		ret = -EIO;  in ec_set_brightness()
340 		return -ENXIO;  in ec_backlight_level()
343 		return -EIO;  in ec_backlight_level()
349 		return -EIO;  in ec_backlight_level()
359 	int lvl = ec_backlight_level(bd->props.brightness);  in loongson_laptop_backlight_update()
362 		return -EIO;  in loongson_laptop_backlight_update()
364 		return -EIO;  in loongson_laptop_backlight_update()
375 		return -EIO;  in loongson_laptop_get_brightness()
393 		return -EIO;  in laptop_backlight_register()
395 	props.brightness = 1;  in laptop_backlight_register()
409 	struct acpi_object_list args = { 1, &arg0 };  in loongson_laptop_turn_on_backlight()
411 	arg0.integer.value = 1;  in loongson_laptop_turn_on_backlight()
414 		pr_info("Loongson lvds error: 0x%x\n", status);  in loongson_laptop_turn_on_backlight()
415 		return -ENODEV;  in loongson_laptop_turn_on_backlight()
425 	struct acpi_object_list args = { 1, &arg0 };  in loongson_laptop_turn_off_backlight()
430 		pr_info("Loongson lvds error: 0x%x\n", status);  in loongson_laptop_turn_off_backlight()
431 		return -ENODEV;  in loongson_laptop_turn_off_backlight()
485 			ke->sw.value = !!(status & (1 << ke->sw.code));  in event_notify()
487 		sparse_keymap_report_entry(generic_inputdev, ke, 1, true);  in event_notify()
499 	if (!sub_driver || !sub_driver->driver)  in generic_subdriver_init()
500 		return -EINVAL;  in generic_subdriver_init()
502 	ret = platform_driver_register(sub_driver->driver);  in generic_subdriver_init()
504 		return -EINVAL;  in generic_subdriver_init()
506 	if (sub_driver->init) {  in generic_subdriver_init()
507 		ret = sub_driver->init(sub_driver);  in generic_subdriver_init()
512 	if (sub_driver->notify) {  in generic_subdriver_init()
514 		if (ret == -ENODEV) {  in generic_subdriver_init()
532 	if (sub_driver->acpi_notify_installed) {  in generic_subdriver_exit()
533 		acpi_remove_notify_handler(*sub_driver->handle,  in generic_subdriver_exit()
534 					   sub_driver->type, dispatch_acpi_notify);  in generic_subdriver_exit()
535 		sub_driver->acpi_notify_installed = 0;  in generic_subdriver_exit()
537 	platform_driver_unregister(sub_driver->driver);  in generic_subdriver_exit()
557 		return -ENODEV;  in generic_acpi_laptop_init()
562 		return -ENODEV;  in generic_acpi_laptop_init()
565 	acpi_write_bit_register(ACPI_BITREG_SCI_ENABLE, 1);  in generic_acpi_laptop_init()
570 		return -ENOMEM;  in generic_acpi_laptop_init()
574 	generic_inputdev->name =  in generic_acpi_laptop_init()
575 		"Loongson Generic Laptop/All-in-One Extra Buttons";  in generic_acpi_laptop_init()
576 	generic_inputdev->phys = ACPI_LAPTOP_NAME "/input0";  in generic_acpi_laptop_init()
577 	generic_inputdev->id.bustype = BUS_HOST;  in generic_acpi_laptop_init()
578 	generic_inputdev->dev.parent = NULL;  in generic_acpi_laptop_init()
585 			while (--i >= 0)  in generic_acpi_laptop_init()
594 		while (--i >= 0)  in generic_acpi_laptop_init()
600 	input_device_registered = 1;  in generic_acpi_laptop_init()
603 		pr_info("Loongson Laptop used, init brightness is 0x%x\n", status);  in generic_acpi_laptop_init()
606 			pr_err("Loongson Laptop: laptop-backlight device register failed\n");  in generic_acpi_laptop_init()
625 MODULE_AUTHOR("Jianmin Lv <lvjianmin@loongson.cn>");
626 MODULE_AUTHOR("Huacai Chen <chenhuacai@loongson.cn>");
627 MODULE_DESCRIPTION("Loongson Laptop/All-in-One ACPI Driver");