1*9c0beb6bSArmin Wolf // SPDX-License-Identifier: GPL-2.0-or-later
2*9c0beb6bSArmin Wolf /*
3*9c0beb6bSArmin Wolf * Linux driver for WMI platform features on MSI notebooks.
4*9c0beb6bSArmin Wolf *
5*9c0beb6bSArmin Wolf * Copyright (C) 2024 Armin Wolf <W_Armin@gmx.de>
6*9c0beb6bSArmin Wolf */
7*9c0beb6bSArmin Wolf
8*9c0beb6bSArmin Wolf #define pr_format(fmt) KBUILD_MODNAME ": " fmt
9*9c0beb6bSArmin Wolf
10*9c0beb6bSArmin Wolf #include <linux/acpi.h>
11*9c0beb6bSArmin Wolf #include <linux/bits.h>
12*9c0beb6bSArmin Wolf #include <linux/bitfield.h>
13*9c0beb6bSArmin Wolf #include <linux/debugfs.h>
14*9c0beb6bSArmin Wolf #include <linux/device.h>
15*9c0beb6bSArmin Wolf #include <linux/device/driver.h>
16*9c0beb6bSArmin Wolf #include <linux/errno.h>
17*9c0beb6bSArmin Wolf #include <linux/hwmon.h>
18*9c0beb6bSArmin Wolf #include <linux/kernel.h>
19*9c0beb6bSArmin Wolf #include <linux/module.h>
20*9c0beb6bSArmin Wolf #include <linux/printk.h>
21*9c0beb6bSArmin Wolf #include <linux/rwsem.h>
22*9c0beb6bSArmin Wolf #include <linux/types.h>
23*9c0beb6bSArmin Wolf #include <linux/wmi.h>
24*9c0beb6bSArmin Wolf
25*9c0beb6bSArmin Wolf #include <asm/unaligned.h>
26*9c0beb6bSArmin Wolf
27*9c0beb6bSArmin Wolf #define DRIVER_NAME "msi-wmi-platform"
28*9c0beb6bSArmin Wolf
29*9c0beb6bSArmin Wolf #define MSI_PLATFORM_GUID "ABBC0F6E-8EA1-11d1-00A0-C90629100000"
30*9c0beb6bSArmin Wolf
31*9c0beb6bSArmin Wolf #define MSI_WMI_PLATFORM_INTERFACE_VERSION 2
32*9c0beb6bSArmin Wolf
33*9c0beb6bSArmin Wolf #define MSI_PLATFORM_WMI_MAJOR_OFFSET 1
34*9c0beb6bSArmin Wolf #define MSI_PLATFORM_WMI_MINOR_OFFSET 2
35*9c0beb6bSArmin Wolf
36*9c0beb6bSArmin Wolf #define MSI_PLATFORM_EC_FLAGS_OFFSET 1
37*9c0beb6bSArmin Wolf #define MSI_PLATFORM_EC_MINOR_MASK GENMASK(3, 0)
38*9c0beb6bSArmin Wolf #define MSI_PLATFORM_EC_MAJOR_MASK GENMASK(5, 4)
39*9c0beb6bSArmin Wolf #define MSI_PLATFORM_EC_CHANGED_PAGE BIT(6)
40*9c0beb6bSArmin Wolf #define MSI_PLATFORM_EC_IS_TIGERLAKE BIT(7)
41*9c0beb6bSArmin Wolf #define MSI_PLATFORM_EC_VERSION_OFFSET 2
42*9c0beb6bSArmin Wolf
43*9c0beb6bSArmin Wolf static bool force;
44*9c0beb6bSArmin Wolf module_param_unsafe(force, bool, 0);
45*9c0beb6bSArmin Wolf MODULE_PARM_DESC(force, "Force loading without checking for supported WMI interface versions");
46*9c0beb6bSArmin Wolf
47*9c0beb6bSArmin Wolf enum msi_wmi_platform_method {
48*9c0beb6bSArmin Wolf MSI_PLATFORM_GET_PACKAGE = 0x01,
49*9c0beb6bSArmin Wolf MSI_PLATFORM_SET_PACKAGE = 0x02,
50*9c0beb6bSArmin Wolf MSI_PLATFORM_GET_EC = 0x03,
51*9c0beb6bSArmin Wolf MSI_PLATFORM_SET_EC = 0x04,
52*9c0beb6bSArmin Wolf MSI_PLATFORM_GET_BIOS = 0x05,
53*9c0beb6bSArmin Wolf MSI_PLATFORM_SET_BIOS = 0x06,
54*9c0beb6bSArmin Wolf MSI_PLATFORM_GET_SMBUS = 0x07,
55*9c0beb6bSArmin Wolf MSI_PLATFORM_SET_SMBUS = 0x08,
56*9c0beb6bSArmin Wolf MSI_PLATFORM_GET_MASTER_BATTERY = 0x09,
57*9c0beb6bSArmin Wolf MSI_PLATFORM_SET_MASTER_BATTERY = 0x0a,
58*9c0beb6bSArmin Wolf MSI_PLATFORM_GET_SLAVE_BATTERY = 0x0b,
59*9c0beb6bSArmin Wolf MSI_PLATFORM_SET_SLAVE_BATTERY = 0x0c,
60*9c0beb6bSArmin Wolf MSI_PLATFORM_GET_TEMPERATURE = 0x0d,
61*9c0beb6bSArmin Wolf MSI_PLATFORM_SET_TEMPERATURE = 0x0e,
62*9c0beb6bSArmin Wolf MSI_PLATFORM_GET_THERMAL = 0x0f,
63*9c0beb6bSArmin Wolf MSI_PLATFORM_SET_THERMAL = 0x10,
64*9c0beb6bSArmin Wolf MSI_PLATFORM_GET_FAN = 0x11,
65*9c0beb6bSArmin Wolf MSI_PLATFORM_SET_FAN = 0x12,
66*9c0beb6bSArmin Wolf MSI_PLATFORM_GET_DEVICE = 0x13,
67*9c0beb6bSArmin Wolf MSI_PLATFORM_SET_DEVICE = 0x14,
68*9c0beb6bSArmin Wolf MSI_PLATFORM_GET_POWER = 0x15,
69*9c0beb6bSArmin Wolf MSI_PLATFORM_SET_POWER = 0x16,
70*9c0beb6bSArmin Wolf MSI_PLATFORM_GET_DEBUG = 0x17,
71*9c0beb6bSArmin Wolf MSI_PLATFORM_SET_DEBUG = 0x18,
72*9c0beb6bSArmin Wolf MSI_PLATFORM_GET_AP = 0x19,
73*9c0beb6bSArmin Wolf MSI_PLATFORM_SET_AP = 0x1a,
74*9c0beb6bSArmin Wolf MSI_PLATFORM_GET_DATA = 0x1b,
75*9c0beb6bSArmin Wolf MSI_PLATFORM_SET_DATA = 0x1c,
76*9c0beb6bSArmin Wolf MSI_PLATFORM_GET_WMI = 0x1d,
77*9c0beb6bSArmin Wolf };
78*9c0beb6bSArmin Wolf
79*9c0beb6bSArmin Wolf struct msi_wmi_platform_debugfs_data {
80*9c0beb6bSArmin Wolf struct wmi_device *wdev;
81*9c0beb6bSArmin Wolf enum msi_wmi_platform_method method;
82*9c0beb6bSArmin Wolf struct rw_semaphore buffer_lock; /* Protects debugfs buffer */
83*9c0beb6bSArmin Wolf size_t length;
84*9c0beb6bSArmin Wolf u8 buffer[32];
85*9c0beb6bSArmin Wolf };
86*9c0beb6bSArmin Wolf
87*9c0beb6bSArmin Wolf static const char * const msi_wmi_platform_debugfs_names[] = {
88*9c0beb6bSArmin Wolf "get_package",
89*9c0beb6bSArmin Wolf "set_package",
90*9c0beb6bSArmin Wolf "get_ec",
91*9c0beb6bSArmin Wolf "set_ec",
92*9c0beb6bSArmin Wolf "get_bios",
93*9c0beb6bSArmin Wolf "set_bios",
94*9c0beb6bSArmin Wolf "get_smbus",
95*9c0beb6bSArmin Wolf "set_smbus",
96*9c0beb6bSArmin Wolf "get_master_battery",
97*9c0beb6bSArmin Wolf "set_master_battery",
98*9c0beb6bSArmin Wolf "get_slave_battery",
99*9c0beb6bSArmin Wolf "set_slave_battery",
100*9c0beb6bSArmin Wolf "get_temperature",
101*9c0beb6bSArmin Wolf "set_temperature",
102*9c0beb6bSArmin Wolf "get_thermal",
103*9c0beb6bSArmin Wolf "set_thermal",
104*9c0beb6bSArmin Wolf "get_fan",
105*9c0beb6bSArmin Wolf "set_fan",
106*9c0beb6bSArmin Wolf "get_device",
107*9c0beb6bSArmin Wolf "set_device",
108*9c0beb6bSArmin Wolf "get_power",
109*9c0beb6bSArmin Wolf "set_power",
110*9c0beb6bSArmin Wolf "get_debug",
111*9c0beb6bSArmin Wolf "set_debug",
112*9c0beb6bSArmin Wolf "get_ap",
113*9c0beb6bSArmin Wolf "set_ap",
114*9c0beb6bSArmin Wolf "get_data",
115*9c0beb6bSArmin Wolf "set_data",
116*9c0beb6bSArmin Wolf "get_wmi"
117*9c0beb6bSArmin Wolf };
118*9c0beb6bSArmin Wolf
msi_wmi_platform_parse_buffer(union acpi_object * obj,u8 * output,size_t length)119*9c0beb6bSArmin Wolf static int msi_wmi_platform_parse_buffer(union acpi_object *obj, u8 *output, size_t length)
120*9c0beb6bSArmin Wolf {
121*9c0beb6bSArmin Wolf if (obj->type != ACPI_TYPE_BUFFER)
122*9c0beb6bSArmin Wolf return -ENOMSG;
123*9c0beb6bSArmin Wolf
124*9c0beb6bSArmin Wolf if (obj->buffer.length != length)
125*9c0beb6bSArmin Wolf return -EPROTO;
126*9c0beb6bSArmin Wolf
127*9c0beb6bSArmin Wolf if (!obj->buffer.pointer[0])
128*9c0beb6bSArmin Wolf return -EIO;
129*9c0beb6bSArmin Wolf
130*9c0beb6bSArmin Wolf memcpy(output, obj->buffer.pointer, obj->buffer.length);
131*9c0beb6bSArmin Wolf
132*9c0beb6bSArmin Wolf return 0;
133*9c0beb6bSArmin Wolf }
134*9c0beb6bSArmin Wolf
msi_wmi_platform_query(struct wmi_device * wdev,enum msi_wmi_platform_method method,u8 * input,size_t input_length,u8 * output,size_t output_length)135*9c0beb6bSArmin Wolf static int msi_wmi_platform_query(struct wmi_device *wdev, enum msi_wmi_platform_method method,
136*9c0beb6bSArmin Wolf u8 *input, size_t input_length, u8 *output, size_t output_length)
137*9c0beb6bSArmin Wolf {
138*9c0beb6bSArmin Wolf struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
139*9c0beb6bSArmin Wolf struct acpi_buffer in = {
140*9c0beb6bSArmin Wolf .length = input_length,
141*9c0beb6bSArmin Wolf .pointer = input
142*9c0beb6bSArmin Wolf };
143*9c0beb6bSArmin Wolf union acpi_object *obj;
144*9c0beb6bSArmin Wolf acpi_status status;
145*9c0beb6bSArmin Wolf int ret;
146*9c0beb6bSArmin Wolf
147*9c0beb6bSArmin Wolf if (!input_length || !output_length)
148*9c0beb6bSArmin Wolf return -EINVAL;
149*9c0beb6bSArmin Wolf
150*9c0beb6bSArmin Wolf status = wmidev_evaluate_method(wdev, 0x0, method, &in, &out);
151*9c0beb6bSArmin Wolf if (ACPI_FAILURE(status))
152*9c0beb6bSArmin Wolf return -EIO;
153*9c0beb6bSArmin Wolf
154*9c0beb6bSArmin Wolf obj = out.pointer;
155*9c0beb6bSArmin Wolf if (!obj)
156*9c0beb6bSArmin Wolf return -ENODATA;
157*9c0beb6bSArmin Wolf
158*9c0beb6bSArmin Wolf ret = msi_wmi_platform_parse_buffer(obj, output, output_length);
159*9c0beb6bSArmin Wolf kfree(obj);
160*9c0beb6bSArmin Wolf
161*9c0beb6bSArmin Wolf return ret;
162*9c0beb6bSArmin Wolf }
163*9c0beb6bSArmin Wolf
msi_wmi_platform_is_visible(const void * drvdata,enum hwmon_sensor_types type,u32 attr,int channel)164*9c0beb6bSArmin Wolf static umode_t msi_wmi_platform_is_visible(const void *drvdata, enum hwmon_sensor_types type,
165*9c0beb6bSArmin Wolf u32 attr, int channel)
166*9c0beb6bSArmin Wolf {
167*9c0beb6bSArmin Wolf return 0444;
168*9c0beb6bSArmin Wolf }
169*9c0beb6bSArmin Wolf
msi_wmi_platform_read(struct device * dev,enum hwmon_sensor_types type,u32 attr,int channel,long * val)170*9c0beb6bSArmin Wolf static int msi_wmi_platform_read(struct device *dev, enum hwmon_sensor_types type, u32 attr,
171*9c0beb6bSArmin Wolf int channel, long *val)
172*9c0beb6bSArmin Wolf {
173*9c0beb6bSArmin Wolf struct wmi_device *wdev = dev_get_drvdata(dev);
174*9c0beb6bSArmin Wolf u8 input[32] = { 0 };
175*9c0beb6bSArmin Wolf u8 output[32];
176*9c0beb6bSArmin Wolf u16 data;
177*9c0beb6bSArmin Wolf int ret;
178*9c0beb6bSArmin Wolf
179*9c0beb6bSArmin Wolf ret = msi_wmi_platform_query(wdev, MSI_PLATFORM_GET_FAN, input, sizeof(input), output,
180*9c0beb6bSArmin Wolf sizeof(output));
181*9c0beb6bSArmin Wolf if (ret < 0)
182*9c0beb6bSArmin Wolf return ret;
183*9c0beb6bSArmin Wolf
184*9c0beb6bSArmin Wolf data = get_unaligned_be16(&output[channel * 2 + 1]);
185*9c0beb6bSArmin Wolf if (!data)
186*9c0beb6bSArmin Wolf *val = 0;
187*9c0beb6bSArmin Wolf else
188*9c0beb6bSArmin Wolf *val = 480000 / data;
189*9c0beb6bSArmin Wolf
190*9c0beb6bSArmin Wolf return 0;
191*9c0beb6bSArmin Wolf }
192*9c0beb6bSArmin Wolf
193*9c0beb6bSArmin Wolf static const struct hwmon_ops msi_wmi_platform_ops = {
194*9c0beb6bSArmin Wolf .is_visible = msi_wmi_platform_is_visible,
195*9c0beb6bSArmin Wolf .read = msi_wmi_platform_read,
196*9c0beb6bSArmin Wolf };
197*9c0beb6bSArmin Wolf
198*9c0beb6bSArmin Wolf static const struct hwmon_channel_info * const msi_wmi_platform_info[] = {
199*9c0beb6bSArmin Wolf HWMON_CHANNEL_INFO(fan,
200*9c0beb6bSArmin Wolf HWMON_F_INPUT,
201*9c0beb6bSArmin Wolf HWMON_F_INPUT,
202*9c0beb6bSArmin Wolf HWMON_F_INPUT,
203*9c0beb6bSArmin Wolf HWMON_F_INPUT
204*9c0beb6bSArmin Wolf ),
205*9c0beb6bSArmin Wolf NULL
206*9c0beb6bSArmin Wolf };
207*9c0beb6bSArmin Wolf
208*9c0beb6bSArmin Wolf static const struct hwmon_chip_info msi_wmi_platform_chip_info = {
209*9c0beb6bSArmin Wolf .ops = &msi_wmi_platform_ops,
210*9c0beb6bSArmin Wolf .info = msi_wmi_platform_info,
211*9c0beb6bSArmin Wolf };
212*9c0beb6bSArmin Wolf
msi_wmi_platform_write(struct file * fp,const char __user * input,size_t length,loff_t * offset)213*9c0beb6bSArmin Wolf static ssize_t msi_wmi_platform_write(struct file *fp, const char __user *input, size_t length,
214*9c0beb6bSArmin Wolf loff_t *offset)
215*9c0beb6bSArmin Wolf {
216*9c0beb6bSArmin Wolf struct seq_file *seq = fp->private_data;
217*9c0beb6bSArmin Wolf struct msi_wmi_platform_debugfs_data *data = seq->private;
218*9c0beb6bSArmin Wolf u8 payload[32] = { };
219*9c0beb6bSArmin Wolf ssize_t ret;
220*9c0beb6bSArmin Wolf
221*9c0beb6bSArmin Wolf /* Do not allow partial writes */
222*9c0beb6bSArmin Wolf if (*offset != 0)
223*9c0beb6bSArmin Wolf return -EINVAL;
224*9c0beb6bSArmin Wolf
225*9c0beb6bSArmin Wolf /* Do not allow incomplete command buffers */
226*9c0beb6bSArmin Wolf if (length != data->length)
227*9c0beb6bSArmin Wolf return -EINVAL;
228*9c0beb6bSArmin Wolf
229*9c0beb6bSArmin Wolf ret = simple_write_to_buffer(payload, sizeof(payload), offset, input, length);
230*9c0beb6bSArmin Wolf if (ret < 0)
231*9c0beb6bSArmin Wolf return ret;
232*9c0beb6bSArmin Wolf
233*9c0beb6bSArmin Wolf down_write(&data->buffer_lock);
234*9c0beb6bSArmin Wolf ret = msi_wmi_platform_query(data->wdev, data->method, payload, data->length, data->buffer,
235*9c0beb6bSArmin Wolf data->length);
236*9c0beb6bSArmin Wolf up_write(&data->buffer_lock);
237*9c0beb6bSArmin Wolf
238*9c0beb6bSArmin Wolf if (ret < 0)
239*9c0beb6bSArmin Wolf return ret;
240*9c0beb6bSArmin Wolf
241*9c0beb6bSArmin Wolf return length;
242*9c0beb6bSArmin Wolf }
243*9c0beb6bSArmin Wolf
msi_wmi_platform_show(struct seq_file * seq,void * p)244*9c0beb6bSArmin Wolf static int msi_wmi_platform_show(struct seq_file *seq, void *p)
245*9c0beb6bSArmin Wolf {
246*9c0beb6bSArmin Wolf struct msi_wmi_platform_debugfs_data *data = seq->private;
247*9c0beb6bSArmin Wolf int ret;
248*9c0beb6bSArmin Wolf
249*9c0beb6bSArmin Wolf down_read(&data->buffer_lock);
250*9c0beb6bSArmin Wolf ret = seq_write(seq, data->buffer, data->length);
251*9c0beb6bSArmin Wolf up_read(&data->buffer_lock);
252*9c0beb6bSArmin Wolf
253*9c0beb6bSArmin Wolf return ret;
254*9c0beb6bSArmin Wolf }
255*9c0beb6bSArmin Wolf
msi_wmi_platform_open(struct inode * inode,struct file * fp)256*9c0beb6bSArmin Wolf static int msi_wmi_platform_open(struct inode *inode, struct file *fp)
257*9c0beb6bSArmin Wolf {
258*9c0beb6bSArmin Wolf struct msi_wmi_platform_debugfs_data *data = inode->i_private;
259*9c0beb6bSArmin Wolf
260*9c0beb6bSArmin Wolf /* The seq_file uses the last byte of the buffer for detecting buffer overflows */
261*9c0beb6bSArmin Wolf return single_open_size(fp, msi_wmi_platform_show, data, data->length + 1);
262*9c0beb6bSArmin Wolf }
263*9c0beb6bSArmin Wolf
264*9c0beb6bSArmin Wolf static const struct file_operations msi_wmi_platform_debugfs_fops = {
265*9c0beb6bSArmin Wolf .owner = THIS_MODULE,
266*9c0beb6bSArmin Wolf .open = msi_wmi_platform_open,
267*9c0beb6bSArmin Wolf .read = seq_read,
268*9c0beb6bSArmin Wolf .write = msi_wmi_platform_write,
269*9c0beb6bSArmin Wolf .llseek = seq_lseek,
270*9c0beb6bSArmin Wolf .release = single_release,
271*9c0beb6bSArmin Wolf };
272*9c0beb6bSArmin Wolf
msi_wmi_platform_debugfs_remove(void * data)273*9c0beb6bSArmin Wolf static void msi_wmi_platform_debugfs_remove(void *data)
274*9c0beb6bSArmin Wolf {
275*9c0beb6bSArmin Wolf struct dentry *dir = data;
276*9c0beb6bSArmin Wolf
277*9c0beb6bSArmin Wolf debugfs_remove_recursive(dir);
278*9c0beb6bSArmin Wolf }
279*9c0beb6bSArmin Wolf
msi_wmi_platform_debugfs_add(struct wmi_device * wdev,struct dentry * dir,const char * name,enum msi_wmi_platform_method method)280*9c0beb6bSArmin Wolf static void msi_wmi_platform_debugfs_add(struct wmi_device *wdev, struct dentry *dir,
281*9c0beb6bSArmin Wolf const char *name, enum msi_wmi_platform_method method)
282*9c0beb6bSArmin Wolf {
283*9c0beb6bSArmin Wolf struct msi_wmi_platform_debugfs_data *data;
284*9c0beb6bSArmin Wolf struct dentry *entry;
285*9c0beb6bSArmin Wolf
286*9c0beb6bSArmin Wolf data = devm_kzalloc(&wdev->dev, sizeof(*data), GFP_KERNEL);
287*9c0beb6bSArmin Wolf if (!data)
288*9c0beb6bSArmin Wolf return;
289*9c0beb6bSArmin Wolf
290*9c0beb6bSArmin Wolf data->wdev = wdev;
291*9c0beb6bSArmin Wolf data->method = method;
292*9c0beb6bSArmin Wolf init_rwsem(&data->buffer_lock);
293*9c0beb6bSArmin Wolf
294*9c0beb6bSArmin Wolf /* The ACPI firmware for now always requires a 32 byte input buffer due to
295*9c0beb6bSArmin Wolf * a peculiarity in how Windows handles the CreateByteField() ACPI operator.
296*9c0beb6bSArmin Wolf */
297*9c0beb6bSArmin Wolf data->length = 32;
298*9c0beb6bSArmin Wolf
299*9c0beb6bSArmin Wolf entry = debugfs_create_file(name, 0600, dir, data, &msi_wmi_platform_debugfs_fops);
300*9c0beb6bSArmin Wolf if (IS_ERR(entry))
301*9c0beb6bSArmin Wolf devm_kfree(&wdev->dev, data);
302*9c0beb6bSArmin Wolf }
303*9c0beb6bSArmin Wolf
msi_wmi_platform_debugfs_init(struct wmi_device * wdev)304*9c0beb6bSArmin Wolf static void msi_wmi_platform_debugfs_init(struct wmi_device *wdev)
305*9c0beb6bSArmin Wolf {
306*9c0beb6bSArmin Wolf struct dentry *dir;
307*9c0beb6bSArmin Wolf char dir_name[64];
308*9c0beb6bSArmin Wolf int ret, method;
309*9c0beb6bSArmin Wolf
310*9c0beb6bSArmin Wolf scnprintf(dir_name, ARRAY_SIZE(dir_name), "%s-%s", DRIVER_NAME, dev_name(&wdev->dev));
311*9c0beb6bSArmin Wolf
312*9c0beb6bSArmin Wolf dir = debugfs_create_dir(dir_name, NULL);
313*9c0beb6bSArmin Wolf if (IS_ERR(dir))
314*9c0beb6bSArmin Wolf return;
315*9c0beb6bSArmin Wolf
316*9c0beb6bSArmin Wolf ret = devm_add_action_or_reset(&wdev->dev, msi_wmi_platform_debugfs_remove, dir);
317*9c0beb6bSArmin Wolf if (ret < 0)
318*9c0beb6bSArmin Wolf return;
319*9c0beb6bSArmin Wolf
320*9c0beb6bSArmin Wolf for (method = MSI_PLATFORM_GET_PACKAGE; method <= MSI_PLATFORM_GET_WMI; method++)
321*9c0beb6bSArmin Wolf msi_wmi_platform_debugfs_add(wdev, dir, msi_wmi_platform_debugfs_names[method - 1],
322*9c0beb6bSArmin Wolf method);
323*9c0beb6bSArmin Wolf }
324*9c0beb6bSArmin Wolf
msi_wmi_platform_hwmon_init(struct wmi_device * wdev)325*9c0beb6bSArmin Wolf static int msi_wmi_platform_hwmon_init(struct wmi_device *wdev)
326*9c0beb6bSArmin Wolf {
327*9c0beb6bSArmin Wolf struct device *hdev;
328*9c0beb6bSArmin Wolf
329*9c0beb6bSArmin Wolf hdev = devm_hwmon_device_register_with_info(&wdev->dev, "msi_wmi_platform", wdev,
330*9c0beb6bSArmin Wolf &msi_wmi_platform_chip_info, NULL);
331*9c0beb6bSArmin Wolf
332*9c0beb6bSArmin Wolf return PTR_ERR_OR_ZERO(hdev);
333*9c0beb6bSArmin Wolf }
334*9c0beb6bSArmin Wolf
msi_wmi_platform_ec_init(struct wmi_device * wdev)335*9c0beb6bSArmin Wolf static int msi_wmi_platform_ec_init(struct wmi_device *wdev)
336*9c0beb6bSArmin Wolf {
337*9c0beb6bSArmin Wolf u8 input[32] = { 0 };
338*9c0beb6bSArmin Wolf u8 output[32];
339*9c0beb6bSArmin Wolf u8 flags;
340*9c0beb6bSArmin Wolf int ret;
341*9c0beb6bSArmin Wolf
342*9c0beb6bSArmin Wolf ret = msi_wmi_platform_query(wdev, MSI_PLATFORM_GET_EC, input, sizeof(input), output,
343*9c0beb6bSArmin Wolf sizeof(output));
344*9c0beb6bSArmin Wolf if (ret < 0)
345*9c0beb6bSArmin Wolf return ret;
346*9c0beb6bSArmin Wolf
347*9c0beb6bSArmin Wolf flags = output[MSI_PLATFORM_EC_FLAGS_OFFSET];
348*9c0beb6bSArmin Wolf
349*9c0beb6bSArmin Wolf dev_dbg(&wdev->dev, "EC RAM version %lu.%lu\n",
350*9c0beb6bSArmin Wolf FIELD_GET(MSI_PLATFORM_EC_MAJOR_MASK, flags),
351*9c0beb6bSArmin Wolf FIELD_GET(MSI_PLATFORM_EC_MINOR_MASK, flags));
352*9c0beb6bSArmin Wolf dev_dbg(&wdev->dev, "EC firmware version %.28s\n",
353*9c0beb6bSArmin Wolf &output[MSI_PLATFORM_EC_VERSION_OFFSET]);
354*9c0beb6bSArmin Wolf
355*9c0beb6bSArmin Wolf if (!(flags & MSI_PLATFORM_EC_IS_TIGERLAKE)) {
356*9c0beb6bSArmin Wolf if (!force)
357*9c0beb6bSArmin Wolf return -ENODEV;
358*9c0beb6bSArmin Wolf
359*9c0beb6bSArmin Wolf dev_warn(&wdev->dev, "Loading on a non-Tigerlake platform\n");
360*9c0beb6bSArmin Wolf }
361*9c0beb6bSArmin Wolf
362*9c0beb6bSArmin Wolf return 0;
363*9c0beb6bSArmin Wolf }
364*9c0beb6bSArmin Wolf
msi_wmi_platform_init(struct wmi_device * wdev)365*9c0beb6bSArmin Wolf static int msi_wmi_platform_init(struct wmi_device *wdev)
366*9c0beb6bSArmin Wolf {
367*9c0beb6bSArmin Wolf u8 input[32] = { 0 };
368*9c0beb6bSArmin Wolf u8 output[32];
369*9c0beb6bSArmin Wolf int ret;
370*9c0beb6bSArmin Wolf
371*9c0beb6bSArmin Wolf ret = msi_wmi_platform_query(wdev, MSI_PLATFORM_GET_WMI, input, sizeof(input), output,
372*9c0beb6bSArmin Wolf sizeof(output));
373*9c0beb6bSArmin Wolf if (ret < 0)
374*9c0beb6bSArmin Wolf return ret;
375*9c0beb6bSArmin Wolf
376*9c0beb6bSArmin Wolf dev_dbg(&wdev->dev, "WMI interface version %u.%u\n",
377*9c0beb6bSArmin Wolf output[MSI_PLATFORM_WMI_MAJOR_OFFSET],
378*9c0beb6bSArmin Wolf output[MSI_PLATFORM_WMI_MINOR_OFFSET]);
379*9c0beb6bSArmin Wolf
380*9c0beb6bSArmin Wolf if (output[MSI_PLATFORM_WMI_MAJOR_OFFSET] != MSI_WMI_PLATFORM_INTERFACE_VERSION) {
381*9c0beb6bSArmin Wolf if (!force)
382*9c0beb6bSArmin Wolf return -ENODEV;
383*9c0beb6bSArmin Wolf
384*9c0beb6bSArmin Wolf dev_warn(&wdev->dev, "Loading despite unsupported WMI interface version (%u.%u)\n",
385*9c0beb6bSArmin Wolf output[MSI_PLATFORM_WMI_MAJOR_OFFSET],
386*9c0beb6bSArmin Wolf output[MSI_PLATFORM_WMI_MINOR_OFFSET]);
387*9c0beb6bSArmin Wolf }
388*9c0beb6bSArmin Wolf
389*9c0beb6bSArmin Wolf return 0;
390*9c0beb6bSArmin Wolf }
391*9c0beb6bSArmin Wolf
msi_wmi_platform_probe(struct wmi_device * wdev,const void * context)392*9c0beb6bSArmin Wolf static int msi_wmi_platform_probe(struct wmi_device *wdev, const void *context)
393*9c0beb6bSArmin Wolf {
394*9c0beb6bSArmin Wolf int ret;
395*9c0beb6bSArmin Wolf
396*9c0beb6bSArmin Wolf ret = msi_wmi_platform_init(wdev);
397*9c0beb6bSArmin Wolf if (ret < 0)
398*9c0beb6bSArmin Wolf return ret;
399*9c0beb6bSArmin Wolf
400*9c0beb6bSArmin Wolf ret = msi_wmi_platform_ec_init(wdev);
401*9c0beb6bSArmin Wolf if (ret < 0)
402*9c0beb6bSArmin Wolf return ret;
403*9c0beb6bSArmin Wolf
404*9c0beb6bSArmin Wolf msi_wmi_platform_debugfs_init(wdev);
405*9c0beb6bSArmin Wolf
406*9c0beb6bSArmin Wolf return msi_wmi_platform_hwmon_init(wdev);
407*9c0beb6bSArmin Wolf }
408*9c0beb6bSArmin Wolf
409*9c0beb6bSArmin Wolf static const struct wmi_device_id msi_wmi_platform_id_table[] = {
410*9c0beb6bSArmin Wolf { MSI_PLATFORM_GUID, NULL },
411*9c0beb6bSArmin Wolf { }
412*9c0beb6bSArmin Wolf };
413*9c0beb6bSArmin Wolf MODULE_DEVICE_TABLE(wmi, msi_wmi_platform_id_table);
414*9c0beb6bSArmin Wolf
415*9c0beb6bSArmin Wolf static struct wmi_driver msi_wmi_platform_driver = {
416*9c0beb6bSArmin Wolf .driver = {
417*9c0beb6bSArmin Wolf .name = DRIVER_NAME,
418*9c0beb6bSArmin Wolf .probe_type = PROBE_PREFER_ASYNCHRONOUS,
419*9c0beb6bSArmin Wolf },
420*9c0beb6bSArmin Wolf .id_table = msi_wmi_platform_id_table,
421*9c0beb6bSArmin Wolf .probe = msi_wmi_platform_probe,
422*9c0beb6bSArmin Wolf .no_singleton = true,
423*9c0beb6bSArmin Wolf };
424*9c0beb6bSArmin Wolf module_wmi_driver(msi_wmi_platform_driver);
425*9c0beb6bSArmin Wolf
426*9c0beb6bSArmin Wolf MODULE_AUTHOR("Armin Wolf <W_Armin@gmx.de>");
427*9c0beb6bSArmin Wolf MODULE_DESCRIPTION("MSI WMI platform features");
428*9c0beb6bSArmin Wolf MODULE_LICENSE("GPL");
429