1 // SPDX-License-Identifier: GPL-2.0-or-later
36 #define DRIVER_NAME	"dell-wmi-ddv"
40 #define DELL_DDV_GUID	"8A42EA14-4F2A-FD45-6422-0087F7A7E608"
132 static int dell_wmi_ddv_query_type(struct wmi_device *wdev, enum dell_ddv_method method, u32 arg,  in dell_wmi_ddv_query_type()  argument
143 	ret = wmidev_evaluate_method(wdev, 0x0, method, &in, &out);  in dell_wmi_ddv_query_type()
145 		return -EIO;  in dell_wmi_ddv_query_type()
149 		return -ENODATA;  in dell_wmi_ddv_query_type()
151 	if (obj->type != type) {  in dell_wmi_ddv_query_type()
153 		return -ENOMSG;  in dell_wmi_ddv_query_type()
161 static int dell_wmi_ddv_query_integer(struct wmi_device *wdev, enum dell_ddv_method method,  in dell_wmi_ddv_query_integer()  argument
167 	ret = dell_wmi_ddv_query_type(wdev, method, arg, &obj, ACPI_TYPE_INTEGER);  in dell_wmi_ddv_query_integer()
171 	if (obj->integer.value <= U32_MAX)  in dell_wmi_ddv_query_integer()
172 		*res = (u32)obj->integer.value;  in dell_wmi_ddv_query_integer()
174 		ret = -ERANGE;  in dell_wmi_ddv_query_integer()
181 static int dell_wmi_ddv_query_buffer(struct wmi_device *wdev, enum dell_ddv_method method,  in dell_wmi_ddv_query_buffer()  argument
188 	ret = dell_wmi_ddv_query_type(wdev, method, arg, &obj, ACPI_TYPE_PACKAGE);  in dell_wmi_ddv_query_buffer()
192 	if (obj->package.count != 2 ||  in dell_wmi_ddv_query_buffer()
193 	    obj->package.elements[0].type != ACPI_TYPE_INTEGER ||  in dell_wmi_ddv_query_buffer()
194 	    obj->package.elements[1].type != ACPI_TYPE_BUFFER) {  in dell_wmi_ddv_query_buffer()
195 		ret = -ENOMSG;  in dell_wmi_ddv_query_buffer()
200 	buffer_size = obj->package.elements[0].integer.value;  in dell_wmi_ddv_query_buffer()
203 		ret = -ENODATA;  in dell_wmi_ddv_query_buffer()
208 	if (buffer_size > obj->package.elements[1].buffer.length) {  in dell_wmi_ddv_query_buffer()
209 		dev_warn(&wdev->dev,  in dell_wmi_ddv_query_buffer()
211 			 buffer_size, obj->package.elements[1].buffer.length);  in dell_wmi_ddv_query_buffer()
212 		ret = -EMSGSIZE;  in dell_wmi_ddv_query_buffer()
227 static int dell_wmi_ddv_query_string(struct wmi_device *wdev, enum dell_ddv_method method,  in dell_wmi_ddv_query_string()  argument
230 	return dell_wmi_ddv_query_type(wdev, method, arg, result, ACPI_TYPE_STRING);  in dell_wmi_ddv_query_string()
236 static int dell_wmi_ddv_update_sensors(struct wmi_device *wdev, enum dell_ddv_method method,  in dell_wmi_ddv_update_sensors()  argument
244 	if (sensors->obj) {  in dell_wmi_ddv_update_sensors()
245 		if (time_before(jiffies, sensors->timestamp + HZ))  in dell_wmi_ddv_update_sensors()
248 		kfree(sensors->obj);  in dell_wmi_ddv_update_sensors()
249 		sensors->obj = NULL;  in dell_wmi_ddv_update_sensors()
252 	ret = dell_wmi_ddv_query_buffer(wdev, method, 0, &obj);  in dell_wmi_ddv_update_sensors()
257 	buffer_size = obj->package.elements[0].integer.value;  in dell_wmi_ddv_update_sensors()
258 	buffer = obj->package.elements[1].buffer.pointer;  in dell_wmi_ddv_update_sensors()
260 	if (rem != 1 || buffer[buffer_size - 1] != 0xff) {  in dell_wmi_ddv_update_sensors()
261 		ret = -ENOMSG;  in dell_wmi_ddv_update_sensors()
266 		ret = -ENODATA;  in dell_wmi_ddv_update_sensors()
270 	sensors->obj = obj;  in dell_wmi_ddv_update_sensors()
271 	sensors->entries = entries;  in dell_wmi_ddv_update_sensors()
272 	sensors->timestamp = jiffies;  in dell_wmi_ddv_update_sensors()
291 	struct fan_sensor_entry *entry;  in dell_wmi_ddv_fan_read_channel()  local
294 	ret = dell_wmi_ddv_update_sensors(data->wdev, DELL_DDV_FAN_SENSOR_INFORMATION,  in dell_wmi_ddv_fan_read_channel()
295 					  &data->fans, sizeof(*entry));  in dell_wmi_ddv_fan_read_channel()
299 	if (channel >= data->fans.entries)  in dell_wmi_ddv_fan_read_channel()
300 		return -ENXIO;  in dell_wmi_ddv_fan_read_channel()
302 	entry = (struct fan_sensor_entry *)data->fans.obj->package.elements[1].buffer.pointer;  in dell_wmi_ddv_fan_read_channel()
305 		*val = get_unaligned_le16(&entry[channel].rpm);  in dell_wmi_ddv_fan_read_channel()
311 	return -EOPNOTSUPP;  in dell_wmi_ddv_fan_read_channel()
317 	struct thermal_sensor_entry *entry;  in dell_wmi_ddv_temp_read_channel()  local
320 	ret = dell_wmi_ddv_update_sensors(data->wdev, DELL_DDV_THERMAL_SENSOR_INFORMATION,  in dell_wmi_ddv_temp_read_channel()
321 					  &data->temps, sizeof(*entry));  in dell_wmi_ddv_temp_read_channel()
325 	if (channel >= data->temps.entries)  in dell_wmi_ddv_temp_read_channel()
326 		return -ENXIO;  in dell_wmi_ddv_temp_read_channel()
328 	entry = (struct thermal_sensor_entry *)data->temps.obj->package.elements[1].buffer.pointer;  in dell_wmi_ddv_temp_read_channel()
331 		*val = entry[channel].now * 1000;  in dell_wmi_ddv_temp_read_channel()
334 		*val = entry[channel].min * 1000;  in dell_wmi_ddv_temp_read_channel()
337 		*val = entry[channel].max * 1000;  in dell_wmi_ddv_temp_read_channel()
343 	return -EOPNOTSUPP;  in dell_wmi_ddv_temp_read_channel()
354 		mutex_lock(&data->fans.lock);  in dell_wmi_ddv_read()
356 		mutex_unlock(&data->fans.lock);  in dell_wmi_ddv_read()
359 		mutex_lock(&data->temps.lock);  in dell_wmi_ddv_read()
361 		mutex_unlock(&data->temps.lock);  in dell_wmi_ddv_read()
367 	return -EOPNOTSUPP;  in dell_wmi_ddv_read()
373 	struct fan_sensor_entry *entry;  in dell_wmi_ddv_fan_read_string()  local
377 	ret = dell_wmi_ddv_update_sensors(data->wdev, DELL_DDV_FAN_SENSOR_INFORMATION,  in dell_wmi_ddv_fan_read_string()
378 					  &data->fans, sizeof(*entry));  in dell_wmi_ddv_fan_read_string()
382 	if (channel >= data->fans.entries)  in dell_wmi_ddv_fan_read_string()
383 		return -ENXIO;  in dell_wmi_ddv_fan_read_string()
385 	entry = (struct fan_sensor_entry *)data->fans.obj->package.elements[1].buffer.pointer;  in dell_wmi_ddv_fan_read_string()
386 	type = entry[channel].type;  in dell_wmi_ddv_fan_read_string()
392 		*str = fan_dock_labels[type - 0x11];  in dell_wmi_ddv_fan_read_string()
405 	struct thermal_sensor_entry *entry;  in dell_wmi_ddv_temp_read_string()  local
408 	ret = dell_wmi_ddv_update_sensors(data->wdev, DELL_DDV_THERMAL_SENSOR_INFORMATION,  in dell_wmi_ddv_temp_read_string()
409 					  &data->temps, sizeof(*entry));  in dell_wmi_ddv_temp_read_string()
413 	if (channel >= data->temps.entries)  in dell_wmi_ddv_temp_read_string()
414 		return -ENXIO;  in dell_wmi_ddv_temp_read_string()
416 	entry = (struct thermal_sensor_entry *)data->temps.obj->package.elements[1].buffer.pointer;  in dell_wmi_ddv_temp_read_string()
417 	switch (entry[channel].type) {  in dell_wmi_ddv_temp_read_string()
469 			mutex_lock(&data->fans.lock);  in dell_wmi_ddv_read_string()
471 			mutex_unlock(&data->fans.lock);  in dell_wmi_ddv_read_string()
480 			mutex_lock(&data->temps.lock);  in dell_wmi_ddv_read_string()
482 			mutex_unlock(&data->temps.lock);  in dell_wmi_ddv_read_string()
492 	return -EOPNOTSUPP;  in dell_wmi_ddv_read_string()
510 		return ERR_PTR(-ENOMEM);  in dell_wmi_ddv_channel_create()
512 	cinfo->info.type = type;  in dell_wmi_ddv_channel_create()
513 	cinfo->info.config = cinfo->config;  in dell_wmi_ddv_channel_create()
516 		cinfo->config[i] = config;  in dell_wmi_ddv_channel_create()
518 	return &cinfo->info;  in dell_wmi_ddv_channel_create()
523 	if (!sensors->active)  in dell_wmi_ddv_hwmon_cache_invalidate()
526 	mutex_lock(&sensors->lock);  in dell_wmi_ddv_hwmon_cache_invalidate()
527 	kfree(sensors->obj);  in dell_wmi_ddv_hwmon_cache_invalidate()
528 	sensors->obj = NULL;  in dell_wmi_ddv_hwmon_cache_invalidate()
529 	mutex_unlock(&sensors->lock);  in dell_wmi_ddv_hwmon_cache_invalidate()
536 	sensors->active = false;  in dell_wmi_ddv_hwmon_cache_destroy()
537 	mutex_destroy(&sensors->lock);  in dell_wmi_ddv_hwmon_cache_destroy()
538 	kfree(sensors->obj);  in dell_wmi_ddv_hwmon_cache_destroy()
542 							    enum dell_ddv_method method,  in dell_wmi_ddv_channel_init()  argument
551 	ret = dell_wmi_ddv_update_sensors(wdev, method, sensors, entry_size);  in dell_wmi_ddv_channel_init()
555 	mutex_init(&sensors->lock);  in dell_wmi_ddv_channel_init()
556 	sensors->active = true;  in dell_wmi_ddv_channel_init()
558 	ret = devm_add_action_or_reset(&wdev->dev, dell_wmi_ddv_hwmon_cache_destroy, sensors);  in dell_wmi_ddv_channel_init()
562 	info = dell_wmi_ddv_channel_create(&wdev->dev, sensors->entries, type, config);  in dell_wmi_ddv_channel_init()
564 		devm_release_action(&wdev->dev, dell_wmi_ddv_hwmon_cache_destroy, sensors);  in dell_wmi_ddv_channel_init()
571 	struct wmi_device *wdev = data->wdev;  in dell_wmi_ddv_hwmon_add()
578 	if (!devres_open_group(&wdev->dev, dell_wmi_ddv_hwmon_add, GFP_KERNEL))  in dell_wmi_ddv_hwmon_add()
579 		return -ENOMEM;  in dell_wmi_ddv_hwmon_add()
581 	cinfo = devm_kzalloc(&wdev->dev, struct_size(cinfo, info, 4), GFP_KERNEL);  in dell_wmi_ddv_hwmon_add()
583 		ret = -ENOMEM;  in dell_wmi_ddv_hwmon_add()
588 	cinfo->chip.ops = &dell_wmi_ddv_ops;  in dell_wmi_ddv_hwmon_add()
589 	cinfo->chip.info = cinfo->info;  in dell_wmi_ddv_hwmon_add()
591 	info = dell_wmi_ddv_channel_create(&wdev->dev, 1, hwmon_chip, HWMON_C_REGISTER_TZ);  in dell_wmi_ddv_hwmon_add()
598 	cinfo->info[index] = info;  in dell_wmi_ddv_hwmon_add()
601 	info = dell_wmi_ddv_channel_init(wdev, DELL_DDV_FAN_SENSOR_INFORMATION, &data->fans,  in dell_wmi_ddv_hwmon_add()
605 		cinfo->info[index] = info;  in dell_wmi_ddv_hwmon_add()
609 	info = dell_wmi_ddv_channel_init(wdev, DELL_DDV_THERMAL_SENSOR_INFORMATION, &data->temps,  in dell_wmi_ddv_hwmon_add()
614 		cinfo->info[index] = info;  in dell_wmi_ddv_hwmon_add()
625 	hdev = devm_hwmon_device_register_with_info(&wdev->dev, "dell_ddv", data, &cinfo->chip,  in dell_wmi_ddv_hwmon_add()
633 	devres_close_group(&wdev->dev, dell_wmi_ddv_hwmon_add);  in dell_wmi_ddv_hwmon_add()
638 	devres_release_group(&wdev->dev, dell_wmi_ddv_hwmon_add);  in dell_wmi_ddv_hwmon_add()
649 		return -ENODEV;  in dell_wmi_ddv_battery_index()
660 	ret = dell_wmi_ddv_battery_index(to_acpi_device(dev->parent), &index);  in temp_show()
664 	ret = dell_wmi_ddv_query_integer(data->wdev, DELL_DDV_BATTERY_TEMPERATURE, index, &value);  in temp_show()
669 	return sysfs_emit(buf, "%d\n", value - 2731);  in temp_show()
679 	ret = dell_wmi_ddv_battery_index(to_acpi_device(dev->parent), &index);  in eppid_show()
683 	ret = dell_wmi_ddv_query_string(data->wdev, DELL_DDV_BATTERY_EPPID, index, &obj);  in eppid_show()
687 	if (obj->string.length != DELL_EPPID_LENGTH && obj->string.length != DELL_EPPID_EXT_LENGTH)  in eppid_show()
688 		dev_info_once(&data->wdev->dev, FW_INFO "Suspicious ePPID length (%d)\n",  in eppid_show()
689 			      obj->string.length);  in eppid_show()
691 	ret = sysfs_emit(buf, "%s\n", obj->string.pointer);  in eppid_show()
705 	ret = dell_wmi_ddv_battery_index(to_acpi_device(battery->dev.parent), &index);  in dell_wmi_ddv_add_battery()
709 	ret = device_create_file(&battery->dev, &data->temp_attr);  in dell_wmi_ddv_add_battery()
713 	ret = device_create_file(&battery->dev, &data->eppid_attr);  in dell_wmi_ddv_add_battery()
715 		device_remove_file(&battery->dev, &data->temp_attr);  in dell_wmi_ddv_add_battery()
727 	device_remove_file(&battery->dev, &data->temp_attr);  in dell_wmi_ddv_remove_battery()
728 	device_remove_file(&battery->dev, &data->eppid_attr);  in dell_wmi_ddv_remove_battery()
742 	data->hook.name = "Dell DDV Battery Extension";  in dell_wmi_ddv_battery_add()
743 	data->hook.add_battery = dell_wmi_ddv_add_battery;  in dell_wmi_ddv_battery_add()
744 	data->hook.remove_battery = dell_wmi_ddv_remove_battery;  in dell_wmi_ddv_battery_add()
746 	sysfs_attr_init(&data->temp_attr.attr);  in dell_wmi_ddv_battery_add()
747 	data->temp_attr.attr.name = "temp";  in dell_wmi_ddv_battery_add()
748 	data->temp_attr.attr.mode = 0444;  in dell_wmi_ddv_battery_add()
749 	data->temp_attr.show = temp_show;  in dell_wmi_ddv_battery_add()
751 	sysfs_attr_init(&data->eppid_attr.attr);  in dell_wmi_ddv_battery_add()
752 	data->eppid_attr.attr.name = "eppid";  in dell_wmi_ddv_battery_add()
753 	data->eppid_attr.attr.mode = 0444;  in dell_wmi_ddv_battery_add()
754 	data->eppid_attr.show = eppid_show;  in dell_wmi_ddv_battery_add()
756 	battery_hook_register(&data->hook);  in dell_wmi_ddv_battery_add()
758 	return devm_add_action_or_reset(&data->wdev->dev, dell_wmi_ddv_battery_remove, &data->hook);  in dell_wmi_ddv_battery_add()
761 static int dell_wmi_ddv_buffer_read(struct seq_file *seq, enum dell_ddv_method method)  in dell_wmi_ddv_buffer_read()  argument
763 	struct device *dev = seq->private;  in dell_wmi_ddv_buffer_read()
770 	ret = dell_wmi_ddv_query_buffer(data->wdev, method, 0, &obj);  in dell_wmi_ddv_buffer_read()
774 	size = obj->package.elements[0].integer.value;  in dell_wmi_ddv_buffer_read()
775 	buf = obj->package.elements[1].buffer.pointer;  in dell_wmi_ddv_buffer_read()
794 	struct dentry *entry = data;  in dell_wmi_ddv_debugfs_remove()  local
796 	debugfs_remove(entry);  in dell_wmi_ddv_debugfs_remove()
801 	struct dentry *entry;  in dell_wmi_ddv_debugfs_init()  local
804 	scnprintf(name, ARRAY_SIZE(name), "%s-%s", DRIVER_NAME, dev_name(&wdev->dev));  in dell_wmi_ddv_debugfs_init()
805 	entry = debugfs_create_dir(name, NULL);  in dell_wmi_ddv_debugfs_init()
807 	debugfs_create_devm_seqfile(&wdev->dev, "fan_sensor_information", entry,  in dell_wmi_ddv_debugfs_init()
809 	debugfs_create_devm_seqfile(&wdev->dev, "thermal_sensor_information", entry,  in dell_wmi_ddv_debugfs_init()
812 	devm_add_action_or_reset(&wdev->dev, dell_wmi_ddv_debugfs_remove, entry);  in dell_wmi_ddv_debugfs_init()
825 	dev_dbg(&wdev->dev, "WMI interface version: %d\n", version);  in dell_wmi_ddv_probe()
828 			return -ENODEV;  in dell_wmi_ddv_probe()
830 		dev_warn(&wdev->dev, "Loading despite unsupported WMI interface version (%u)\n",  in dell_wmi_ddv_probe()
834 	data = devm_kzalloc(&wdev->dev, sizeof(*data), GFP_KERNEL);  in dell_wmi_ddv_probe()
836 		return -ENOMEM;  in dell_wmi_ddv_probe()
838 	dev_set_drvdata(&wdev->dev, data);  in dell_wmi_ddv_probe()
839 	data->wdev = wdev;  in dell_wmi_ddv_probe()
846 			dev_warn(&wdev->dev, "Unable to register ACPI battery hook: %d\n", ret);  in dell_wmi_ddv_probe()
852 			dev_warn(&wdev->dev, "Unable to register hwmon interface: %d\n", ret);  in dell_wmi_ddv_probe()
862 	/* Force re-reading of all active sensors */  in dell_wmi_ddv_resume()
863 	dell_wmi_ddv_hwmon_cache_invalidate(&data->fans);  in dell_wmi_ddv_resume()
864 	dell_wmi_ddv_hwmon_cache_invalidate(&data->temps);  in dell_wmi_ddv_resume()