@@ -1423,6 +1423,7 @@ config SENSORS_NCT6683
config SENSORS_NCT6775
tristate "Nuvoton NCT6775F and compatibles"
depends on !PPC
+ depends on ACPI_WMI || ACPI_WMI=n
select HWMON_VID
help
If you say yes here you get support for the hardware monitoring
@@ -55,6 +55,7 @@
#include <linux/dmi.h>
#include <linux/io.h>
#include <linux/nospec.h>
+#include <linux/wmi.h>
#include "lm75.h"
#define USE_ALTERNATE
@@ -132,10 +133,13 @@ MODULE_PARM_DESC(fan_debounce, "Enable debouncing for fan RPM signal");
#define SIO_ID_MASK 0xFFF8
enum pwm_enable { off, manual, thermal_cruise, speed_cruise, sf3, sf4 };
+enum sensor_access { access_direct, access_asuswmi };
struct nct6775_sio_data {
int sioreg;
+ int ld;
enum kinds kind;
+ enum sensor_access access;
/* superio_() callbacks */
void (*sio_outb)(struct nct6775_sio_data *sio_data, int reg, int val);
@@ -145,6 +149,91 @@ struct nct6775_sio_data {
void (*sio_exit)(struct nct6775_sio_data *sio_data);
};
+#define ASUSWMI_MONITORING_GUID "466747A0-70EC-11DE-8A39-0800200C9A66"
+#define ASUSWMI_METHODID_RSIO 0x5253494F
+#define ASUSWMI_METHODID_WSIO 0x5753494F
+#define ASUSWMI_METHODID_RHWM 0x5248574D
+#define ASUSWMI_METHODID_WHWM 0x5748574D
+#define ASUSWMI_UNSUPPORTED_METHOD 0xFFFFFFFE
+
+static int nct6775_asuswmi_evaluate_method(u32 method_id, u8 bank, u8 reg, u8 val, u32 *retval)
+{
+#if IS_ENABLED(CONFIG_ACPI_WMI)
+ u32 args = bank | (reg << 8) | (val << 16);
+ struct acpi_buffer input = { (acpi_size) sizeof(args), &args };
+ struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
+ acpi_status status;
+ union acpi_object *obj;
+ u32 tmp = ASUSWMI_UNSUPPORTED_METHOD;
+
+ status = wmi_evaluate_method(ASUSWMI_MONITORING_GUID, 0,
+ method_id, &input, &output);
+
+ if (ACPI_FAILURE(status))
+ return -EIO;
+
+ obj = output.pointer;
+ if (obj && obj->type == ACPI_TYPE_INTEGER)
+ tmp = obj->integer.value;
+
+ if (retval)
+ *retval = tmp;
+
+ kfree(obj);
+
+ if (tmp == ASUSWMI_UNSUPPORTED_METHOD)
+ return -ENODEV;
+ return 0;
+#else
+ return -EOPNOTSUPP;
+#endif
+}
+
+static inline int nct6775_asuswmi_write(u8 bank, u8 reg, u8 val)
+{
+ return nct6775_asuswmi_evaluate_method(ASUSWMI_METHODID_WHWM, bank,
+ reg, val, NULL);
+}
+
+static inline int nct6775_asuswmi_read(u8 bank, u8 reg, u8 *val)
+{
+ u32 ret, tmp = 0;
+
+ ret = nct6775_asuswmi_evaluate_method(ASUSWMI_METHODID_RHWM, bank,
+ reg, 0, &tmp);
+ *val = tmp;
+ return ret;
+}
+
+static int superio_wmi_inb(struct nct6775_sio_data *sio_data, int reg)
+{
+ int tmp = 0;
+
+ nct6775_asuswmi_evaluate_method(ASUSWMI_METHODID_RSIO, sio_data->ld,
+ reg, 0, &tmp);
+ return tmp;
+}
+
+static void superio_wmi_outb(struct nct6775_sio_data *sio_data, int reg, int val)
+{
+ nct6775_asuswmi_evaluate_method(ASUSWMI_METHODID_WSIO, sio_data->ld,
+ reg, val, NULL);
+}
+
+static void superio_wmi_select(struct nct6775_sio_data *sio_data, int ld)
+{
+ sio_data->ld = ld;
+}
+
+static int superio_wmi_enter(struct nct6775_sio_data *sio_data)
+{
+ return 0;
+}
+
+static void superio_wmi_exit(struct nct6775_sio_data *sio_data)
+{
+}
+
static void superio_outb(struct nct6775_sio_data *sio_data, int reg, int val)
{
int ioreg = sio_data->sioreg;
@@ -207,6 +296,7 @@ static void superio_exit(struct nct6775_sio_data *sio_data)
#define NCT6775_REG_BANK 0x4E
#define NCT6775_REG_CONFIG 0x40
+#define NCT6775_PORT_CHIPID 0x58
/*
* Not currently used:
@@ -1423,6 +1513,54 @@ static bool is_word_sized(struct nct6775_data *data, u16 reg)
return false;
}
+static inline void nct6775_wmi_set_bank(struct nct6775_data *data, u16 reg)
+{
+ u8 bank = reg >> 8;
+
+ data->bank = bank;
+}
+
+static u16 nct6775_wmi_read_value(struct nct6775_data *data, u16 reg)
+{
+ int res, err, word_sized = is_word_sized(data, reg);
+ u8 tmp = 0;
+
+ nct6775_wmi_set_bank(data, reg);
+
+ err = nct6775_asuswmi_read(data->bank, reg, &tmp);
+ if (err)
+ return 0;
+
+ res = tmp;
+ if (word_sized) {
+ err = nct6775_asuswmi_read(data->bank, (reg & 0xff) + 1, &tmp);
+ if (err)
+ return 0;
+
+ res = (res << 8) + tmp;
+ }
+ return res;
+}
+
+static int nct6775_wmi_write_value(struct nct6775_data *data, u16 reg, u16 value)
+{
+ int res, word_sized = is_word_sized(data, reg);
+
+ nct6775_wmi_set_bank(data, reg);
+
+ if (word_sized) {
+ res = nct6775_asuswmi_write(data->bank, reg & 0xff, value >> 8);
+ if (res)
+ return res;
+
+ res = nct6775_asuswmi_write(data->bank, (reg & 0xff) + 1, value);
+ } else {
+ res = nct6775_asuswmi_write(data->bank, reg & 0xff, value);
+ }
+
+ return res;
+}
+
/*
* On older chips, only registers 0x50-0x5f are banked.
* On more recent chips, all registers are banked.
@@ -3818,10 +3956,12 @@ static int nct6775_probe(struct platform_device *pdev)
struct device *hwmon_dev;
int num_attr_groups = 0;
- res = platform_get_resource(pdev, IORESOURCE_IO, 0);
- if (!devm_request_region(&pdev->dev, res->start, IOREGION_LENGTH,
- DRVNAME))
- return -EBUSY;
+ if (sio_data->access == access_direct) {
+ res = platform_get_resource(pdev, IORESOURCE_IO, 0);
+ if (!devm_request_region(&pdev->dev, res->start, IOREGION_LENGTH,
+ DRVNAME))
+ return -EBUSY;
+ }
data = devm_kzalloc(&pdev->dev, sizeof(struct nct6775_data),
GFP_KERNEL);
@@ -3830,9 +3970,16 @@ static int nct6775_probe(struct platform_device *pdev)
data->kind = sio_data->kind;
data->sioreg = sio_data->sioreg;
- data->addr = res->start;
- data->read_value = nct6775_read_value;
- data->write_value = nct6775_write_value;
+
+ if (sio_data->access == access_direct) {
+ data->addr = res->start;
+ data->read_value = nct6775_read_value;
+ data->write_value = nct6775_write_value;
+ } else {
+ data->read_value = nct6775_wmi_read_value;
+ data->write_value = nct6775_wmi_write_value;
+ }
+
mutex_init(&data->update_lock);
data->name = nct6775_device_names[data->kind];
data->bank = 0xff; /* Force initial bank selection */
@@ -4743,6 +4890,7 @@ static int __init nct6775_find(int sioaddr, struct nct6775_sio_data *sio_data)
int err;
int addr;
+ sio_data->access = access_direct;
sio_data->sioreg = sioaddr;
err = sio_data->sio_enter(sio_data);
@@ -4837,6 +4985,23 @@ static int __init nct6775_find(int sioaddr, struct nct6775_sio_data *sio_data)
*/
static struct platform_device *pdev[2];
+static const char * const asus_wmi_boards[] = {
+ "PRIME B460-PLUS",
+ "ROG CROSSHAIR VIII DARK HERO",
+ "ROG CROSSHAIR VIII HERO",
+ "ROG CROSSHAIR VIII IMPACT",
+ "ROG STRIX B550-E GAMING",
+ "ROG STRIX B550-F GAMING",
+ "ROG STRIX B550-F GAMING (WI-FI)",
+ "ROG STRIX Z490-I GAMING",
+ "TUF GAMING B550M-PLUS",
+ "TUF GAMING B550M-PLUS (WI-FI)",
+ "TUF GAMING B550-PLUS",
+ "TUF GAMING X570-PLUS",
+ "TUF GAMING X570-PLUS (WI-FI)",
+ "TUF GAMING X570-PRO (WI-FI)",
+};
+
static int __init sensors_nct6775_init(void)
{
int i, err;
@@ -4845,11 +5010,32 @@ static int __init sensors_nct6775_init(void)
struct resource res;
struct nct6775_sio_data sio_data;
int sioaddr[2] = { 0x2e, 0x4e };
+ enum sensor_access access = access_direct;
+ const char *board_vendor, *board_name;
+ u8 tmp;
err = platform_driver_register(&nct6775_driver);
if (err)
return err;
+ board_vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
+ board_name = dmi_get_system_info(DMI_BOARD_NAME);
+
+ if (board_name && board_vendor &&
+ !strcmp(board_vendor, "ASUSTeK COMPUTER INC.")) {
+ err = match_string(asus_wmi_boards, ARRAY_SIZE(asus_wmi_boards),
+ board_name);
+ if (err >= 0) {
+ /* if reading chip id via WMI succeeds, use WMI */
+ if (!nct6775_asuswmi_read(0, NCT6775_PORT_CHIPID, &tmp)) {
+ pr_info("Using Asus WMI to access %#x chip.\n", tmp);
+ access = access_asuswmi;
+ } else {
+ pr_err("Can't read ChipID by Asus WMI.\n");
+ }
+ }
+ }
+
/*
* initialize sio_data->kind and sio_data->sioreg.
*
@@ -4870,6 +5056,16 @@ static int __init sensors_nct6775_init(void)
found = true;
+ sio_data.access = access;
+
+ if (access == access_asuswmi) {
+ sio_data.sio_outb = superio_wmi_outb;
+ sio_data.sio_inb = superio_wmi_inb;
+ sio_data.sio_select = superio_wmi_select;
+ sio_data.sio_enter = superio_wmi_enter;
+ sio_data.sio_exit = superio_wmi_exit;
+ }
+
pdev[i] = platform_device_alloc(DRVNAME, address);
if (!pdev[i]) {
err = -ENOMEM;
@@ -4881,23 +5077,25 @@ static int __init sensors_nct6775_init(void)
if (err)
goto exit_device_put;
- memset(&res, 0, sizeof(res));
- res.name = DRVNAME;
- res.start = address + IOREGION_OFFSET;
- res.end = address + IOREGION_OFFSET + IOREGION_LENGTH - 1;
- res.flags = IORESOURCE_IO;
+ if (sio_data.access == access_direct) {
+ memset(&res, 0, sizeof(res));
+ res.name = DRVNAME;
+ res.start = address + IOREGION_OFFSET;
+ res.end = address + IOREGION_OFFSET + IOREGION_LENGTH - 1;
+ res.flags = IORESOURCE_IO;
+
+ err = acpi_check_resource_conflict(&res);
+ if (err) {
+ platform_device_put(pdev[i]);
+ pdev[i] = NULL;
+ continue;
+ }
- err = acpi_check_resource_conflict(&res);
- if (err) {
- platform_device_put(pdev[i]);
- pdev[i] = NULL;
- continue;
+ err = platform_device_add_resources(pdev[i], &res, 1);
+ if (err)
+ goto exit_device_put;
}
- err = platform_device_add_resources(pdev[i], &res, 1);
- if (err)
- goto exit_device_put;
-
/* platform_device_add calls probe() */
err = platform_device_add(pdev[i]);
if (err)