1 // SPDX-License-Identifier: GPL-2.0
3  *  Generic Loongson processor based LAPTOP/ALL-IN-ONE driver
20 #include <linux/input/sparse-keymap.h>
26 /* 1. Driver-wide structs and misc. variables */
32 #define ACPI_LAPTOP_NAME "loongson-laptop"
100 		default:  in acpi_evalf()
127 	default:  in acpi_evalf()
142 		return -EIO;  in hotkey_status_get()
151 	if (!sub_driver || !sub_driver->notify)  in dispatch_acpi_notify()
153 	sub_driver->notify(sub_driver, event);  in dispatch_acpi_notify()
160 	if (!*sub_driver->handle)  in setup_acpi_notify()
163 	sub_driver->device = acpi_fetch_acpi_dev(*sub_driver->handle);  in setup_acpi_notify()
164 	if (!sub_driver->device) {  in setup_acpi_notify()
165 		pr_err("acpi_fetch_acpi_dev(%s) failed\n", sub_driver->name);  in setup_acpi_notify()
166 		return -ENODEV;  in setup_acpi_notify()
169 	sub_driver->device->driver_data = sub_driver;  in setup_acpi_notify()
170 	sprintf(acpi_device_class(sub_driver->device), "%s/%s",  in setup_acpi_notify()
171 		ACPI_LAPTOP_ACPI_EVENT_PREFIX, sub_driver->name);  in setup_acpi_notify()
173 	status = acpi_install_notify_handler(*sub_driver->handle,  in setup_acpi_notify()
174 			sub_driver->type, dispatch_acpi_notify, sub_driver);  in setup_acpi_notify()
178 				  "handling %s events\n", sub_driver->name);  in setup_acpi_notify()
181 			       sub_driver->name, acpi_format_exception(status));  in setup_acpi_notify()
183 		return -ENODEV;  in setup_acpi_notify()
185 	sub_driver->acpi_notify_installed = 1;  in setup_acpi_notify()
204 		pr_warn("Loongson_backlight: resume brightness failed") :  in loongson_hotkey_resume()
205 		pr_info("Loongson_backlight: resume brightness %d\n", bd->props.brightness);  in loongson_hotkey_resume()
212 	if (test_bit(SW_LID, generic_inputdev->swbit)) {  in loongson_hotkey_resume()
214 			return -EIO;  in loongson_hotkey_resume()
217 		 * When the system is awakened by other wake-up sources,  in loongson_hotkey_resume()
229 		if (test_bit(SW_LID, generic_inputdev->sw) && !(status & (1 << SW_LID))) {  in loongson_hotkey_resume()
245 	hotkey_handle = ACPI_HANDLE(&pdev->dev);  in loongson_hotkey_probe()
248 		return -ENODEV;  in loongson_hotkey_probe()
262 		.name	= "loongson-hotkey",
280 		return -1;  in hotkey_map()
283 	for (index = 0; index < pack->package.count; index++) {  in hotkey_map()
286 		sub_pack = &pack->package.elements[index];  in hotkey_map()
288 		element = &sub_pack->package.elements[0];  in hotkey_map()
289 		hotkey_keycode_map[index].type = element->integer.value;  in hotkey_map()
290 		element = &sub_pack->package.elements[1];  in hotkey_map()
291 		hotkey_keycode_map[index].code = element->integer.value;  in hotkey_map()
292 		element = &sub_pack->package.elements[2];  in hotkey_map()
293 		hotkey_keycode_map[index].keycode = element->integer.value;  in hotkey_map()
302 		return -EIO;  in hotkey_backlight_set()
312 		return -ENXIO;  in ec_get_brightness()
315 		return -EIO;  in ec_get_brightness()
320 static int ec_set_brightness(int level)  in ec_set_brightness()  argument
326 		return -ENXIO;  in ec_set_brightness()
328 	if (!acpi_evalf(hotkey_handle, NULL, "ECBS", "vd", level))  in ec_set_brightness()
329 		ret = -EIO;  in ec_set_brightness()
334 static int ec_backlight_level(u8 level)  in ec_backlight_level()  argument
339 		return -ENXIO;  in ec_backlight_level()
342 		return -EIO;  in ec_backlight_level()
344 	if ((status < 0) || (level > status))  in ec_backlight_level()
348 		return -EIO;  in ec_backlight_level()
350 	if ((status < 0) || (level < status))  in ec_backlight_level()
353 	return level;  in ec_backlight_level()
366 		return -EIO;  in ec_backlight_set_power()
375 	int ret = 0, lvl = ec_backlight_level(bd->props.brightness);  in loongson_laptop_backlight_update()
378 		return -EIO;  in loongson_laptop_backlight_update()
381 		return -EIO;  in loongson_laptop_backlight_update()
396 	int level;  in loongson_laptop_get_brightness()  local
398 	level = ec_get_brightness();  in loongson_laptop_get_brightness()
399 	if (level < 0)  in loongson_laptop_get_brightness()
400 		return -EIO;  in loongson_laptop_get_brightness()
402 	return level;  in loongson_laptop_get_brightness()
418 		return -EIO;  in laptop_backlight_register()
427 	props.brightness = ec_get_brightness();  in laptop_backlight_register()
486 			ke->sw.value = !!(status & (1 << ke->sw.code));  in event_notify()
500 	if (!sub_driver || !sub_driver->driver)  in generic_subdriver_init()
501 		return -EINVAL;  in generic_subdriver_init()
503 	ret = platform_driver_register(sub_driver->driver);  in generic_subdriver_init()
505 		return -EINVAL;  in generic_subdriver_init()
507 	if (sub_driver->init) {  in generic_subdriver_init()
508 		ret = sub_driver->init(sub_driver);  in generic_subdriver_init()
513 	if (sub_driver->notify) {  in generic_subdriver_init()
515 		if (ret == -ENODEV) {  in generic_subdriver_init()
533 	if (sub_driver->acpi_notify_installed) {  in generic_subdriver_exit()
534 		acpi_remove_notify_handler(*sub_driver->handle,  in generic_subdriver_exit()
535 					   sub_driver->type, dispatch_acpi_notify);  in generic_subdriver_exit()
536 		sub_driver->acpi_notify_installed = 0;  in generic_subdriver_exit()
538 	platform_driver_unregister(sub_driver->driver);  in generic_subdriver_exit()
558 		return -ENODEV;  in generic_acpi_laptop_init()
563 		return -ENODEV;  in generic_acpi_laptop_init()
571 		return -ENOMEM;  in generic_acpi_laptop_init()
575 	generic_inputdev->name =  in generic_acpi_laptop_init()
576 		"Loongson Generic Laptop/All-in-One Extra Buttons";  in generic_acpi_laptop_init()
577 	generic_inputdev->phys = ACPI_LAPTOP_NAME "/input0";  in generic_acpi_laptop_init()
578 	generic_inputdev->id.bustype = BUS_HOST;  in generic_acpi_laptop_init()
579 	generic_inputdev->dev.parent = NULL;  in generic_acpi_laptop_init()
586 			while (--i >= 0)  in generic_acpi_laptop_init()
595 		while (--i >= 0)  in generic_acpi_laptop_init()
604 		pr_info("Loongson Laptop used, init brightness is 0x%x\n", status);  in generic_acpi_laptop_init()
607 			pr_err("Loongson Laptop: laptop-backlight device register failed\n");  in generic_acpi_laptop_init()
634 MODULE_DESCRIPTION("Loongson Laptop/All-in-One ACPI Driver");