1 // SPDX-License-Identifier: GPL-2.0-or-later
27 #define DRIVER_NAME	"msi-wmi-platform"
29 #define MSI_PLATFORM_GUID	"ABBC0F6E-8EA1-11d1-00A0-C90629100000"
81 	enum msi_wmi_platform_method method;  member
121 	if (obj->type != ACPI_TYPE_BUFFER)  in msi_wmi_platform_parse_buffer()
122 		return -ENOMSG;  in msi_wmi_platform_parse_buffer()
124 	if (obj->buffer.length != length)  in msi_wmi_platform_parse_buffer()
125 		return -EPROTO;  in msi_wmi_platform_parse_buffer()
127 	if (!obj->buffer.pointer[0])  in msi_wmi_platform_parse_buffer()
128 		return -EIO;  in msi_wmi_platform_parse_buffer()
130 	memcpy(output, obj->buffer.pointer, obj->buffer.length);  in msi_wmi_platform_parse_buffer()
135 static int msi_wmi_platform_query(struct wmi_device *wdev, enum msi_wmi_platform_method method,  in msi_wmi_platform_query()  argument
148 		return -EINVAL;  in msi_wmi_platform_query()
150 	status = wmidev_evaluate_method(wdev, 0x0, method, &in, &out);  in msi_wmi_platform_query()
152 		return -EIO;  in msi_wmi_platform_query()
156 		return -ENODATA;  in msi_wmi_platform_query()
216 	struct seq_file *seq = fp->private_data;  in msi_wmi_platform_write()
217 	struct msi_wmi_platform_debugfs_data *data = seq->private;  in msi_wmi_platform_write()
223 		return -EINVAL;  in msi_wmi_platform_write()
226 	if (length != data->length)  in msi_wmi_platform_write()
227 		return -EINVAL;  in msi_wmi_platform_write()
233 	down_write(&data->buffer_lock);  in msi_wmi_platform_write()
234 	ret = msi_wmi_platform_query(data->wdev, data->method, payload, data->length, data->buffer,  in msi_wmi_platform_write()
235 				     data->length);  in msi_wmi_platform_write()
236 	up_write(&data->buffer_lock);  in msi_wmi_platform_write()
246 	struct msi_wmi_platform_debugfs_data *data = seq->private;  in msi_wmi_platform_show()
249 	down_read(&data->buffer_lock);  in msi_wmi_platform_show()
250 	ret = seq_write(seq, data->buffer, data->length);  in msi_wmi_platform_show()
251 	up_read(&data->buffer_lock);  in msi_wmi_platform_show()
258 	struct msi_wmi_platform_debugfs_data *data = inode->i_private;  in msi_wmi_platform_open()
261 	return single_open_size(fp, msi_wmi_platform_show, data, data->length + 1);  in msi_wmi_platform_open()
281 					 const char *name, enum msi_wmi_platform_method method)  in msi_wmi_platform_debugfs_add()  argument
284 	struct dentry *entry;  in msi_wmi_platform_debugfs_add()  local
286 	data = devm_kzalloc(&wdev->dev, sizeof(*data), GFP_KERNEL);  in msi_wmi_platform_debugfs_add()
290 	data->wdev = wdev;  in msi_wmi_platform_debugfs_add()
291 	data->method = method;  in msi_wmi_platform_debugfs_add()
292 	init_rwsem(&data->buffer_lock);  in msi_wmi_platform_debugfs_add()
297 	data->length = 32;  in msi_wmi_platform_debugfs_add()
299 	entry = debugfs_create_file(name, 0600, dir, data, &msi_wmi_platform_debugfs_fops);  in msi_wmi_platform_debugfs_add()
300 	if (IS_ERR(entry))  in msi_wmi_platform_debugfs_add()
301 		devm_kfree(&wdev->dev, data);  in msi_wmi_platform_debugfs_add()
308 	int ret, method;  in msi_wmi_platform_debugfs_init()  local
310 	scnprintf(dir_name, ARRAY_SIZE(dir_name), "%s-%s", DRIVER_NAME, dev_name(&wdev->dev));  in msi_wmi_platform_debugfs_init()
316 	ret = devm_add_action_or_reset(&wdev->dev, msi_wmi_platform_debugfs_remove, dir);  in msi_wmi_platform_debugfs_init()
320 	for (method = MSI_PLATFORM_GET_PACKAGE; method <= MSI_PLATFORM_GET_WMI; method++)  in msi_wmi_platform_debugfs_init()
321 		msi_wmi_platform_debugfs_add(wdev, dir, msi_wmi_platform_debugfs_names[method - 1],  in msi_wmi_platform_debugfs_init()
322 					     method);  in msi_wmi_platform_debugfs_init()
329 	hdev = devm_hwmon_device_register_with_info(&wdev->dev, "msi_wmi_platform", wdev,  in msi_wmi_platform_hwmon_init()
349 	dev_dbg(&wdev->dev, "EC RAM version %lu.%lu\n",  in msi_wmi_platform_ec_init()
352 	dev_dbg(&wdev->dev, "EC firmware version %.28s\n",  in msi_wmi_platform_ec_init()
357 			return -ENODEV;  in msi_wmi_platform_ec_init()
359 		dev_warn(&wdev->dev, "Loading on a non-Tigerlake platform\n");  in msi_wmi_platform_ec_init()
376 	dev_dbg(&wdev->dev, "WMI interface version %u.%u\n",  in msi_wmi_platform_init()
382 			return -ENODEV;  in msi_wmi_platform_init()
384 		dev_warn(&wdev->dev, "Loading despite unsupported WMI interface version (%u.%u)\n",  in msi_wmi_platform_init()