| // SPDX-License-Identifier: GPL-2.0-or-later |
| /* |
| * nct6775 - Platform driver for the hardware monitoring |
| * functionality of Nuvoton NCT677x Super-I/O chips |
| * |
| * Copyright (C) 2012 Guenter Roeck <linux@roeck-us.net> |
| */ |
| |
| #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| |
| #include <linux/acpi.h> |
| #include <linux/dmi.h> |
| #include <linux/hwmon-sysfs.h> |
| #include <linux/hwmon-vid.h> |
| #include <linux/init.h> |
| #include <linux/io.h> |
| #include <linux/module.h> |
| #include <linux/platform_device.h> |
| #include <linux/regmap.h> |
| #include <linux/wmi.h> |
| |
| #include "nct6775.h" |
| |
| enum sensor_access { access_direct, access_asuswmi }; |
| |
| static const char * const nct6775_sio_names[] __initconst = { |
| "NCT6106D", |
| "NCT6116D", |
| "NCT6775F", |
| "NCT6776D/F", |
| "NCT6779D", |
| "NCT6791D", |
| "NCT6792D", |
| "NCT6793D", |
| "NCT6795D", |
| "NCT6796D", |
| "NCT6797D", |
| "NCT6798D", |
| }; |
| |
| static unsigned short force_id; |
| module_param(force_id, ushort, 0); |
| MODULE_PARM_DESC(force_id, "Override the detected device ID"); |
| |
| static unsigned short fan_debounce; |
| module_param(fan_debounce, ushort, 0); |
| MODULE_PARM_DESC(fan_debounce, "Enable debouncing for fan RPM signal"); |
| |
| #define DRVNAME "nct6775" |
| |
| #define NCT6775_PORT_CHIPID 0x58 |
| |
| /* |
| * ISA constants |
| */ |
| |
| #define IOREGION_ALIGNMENT (~7) |
| #define IOREGION_OFFSET 5 |
| #define IOREGION_LENGTH 2 |
| #define ADDR_REG_OFFSET 0 |
| #define DATA_REG_OFFSET 1 |
| |
| /* |
| * Super-I/O constants and functions |
| */ |
| |
| #define NCT6775_LD_ACPI 0x0a |
| #define NCT6775_LD_HWM 0x0b |
| #define NCT6775_LD_VID 0x0d |
| #define NCT6775_LD_12 0x12 |
| |
| #define SIO_REG_LDSEL 0x07 /* Logical device select */ |
| #define SIO_REG_DEVID 0x20 /* Device ID (2 bytes) */ |
| #define SIO_REG_ENABLE 0x30 /* Logical device enable */ |
| #define SIO_REG_ADDR 0x60 /* Logical device address (2 bytes) */ |
| |
| #define SIO_NCT6106_ID 0xc450 |
| #define SIO_NCT6116_ID 0xd280 |
| #define SIO_NCT6775_ID 0xb470 |
| #define SIO_NCT6776_ID 0xc330 |
| #define SIO_NCT6779_ID 0xc560 |
| #define SIO_NCT6791_ID 0xc800 |
| #define SIO_NCT6792_ID 0xc910 |
| #define SIO_NCT6793_ID 0xd120 |
| #define SIO_NCT6795_ID 0xd350 |
| #define SIO_NCT6796_ID 0xd420 |
| #define SIO_NCT6797_ID 0xd450 |
| #define SIO_NCT6798_ID 0xd428 |
| #define SIO_ID_MASK 0xFFF8 |
| |
| /* |
| * Control registers |
| */ |
| #define NCT6775_REG_CR_FAN_DEBOUNCE 0xf0 |
| |
| 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); |
| int (*sio_inb)(struct nct6775_sio_data *sio_data, int reg); |
| void (*sio_select)(struct nct6775_sio_data *sio_data, int ld); |
| int (*sio_enter)(struct nct6775_sio_data *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; |
| |
| outb(reg, ioreg); |
| outb(val, ioreg + 1); |
| } |
| |
| static int superio_inb(struct nct6775_sio_data *sio_data, int reg) |
| { |
| int ioreg = sio_data->sioreg; |
| |
| outb(reg, ioreg); |
| return inb(ioreg + 1); |
| } |
| |
| static void superio_select(struct nct6775_sio_data *sio_data, int ld) |
| { |
| int ioreg = sio_data->sioreg; |
| |
| outb(SIO_REG_LDSEL, ioreg); |
| outb(ld, ioreg + 1); |
| } |
| |
| static int superio_enter(struct nct6775_sio_data *sio_data) |
| { |
| int ioreg = sio_data->sioreg; |
| |
| /* |
| * Try to reserve <ioreg> and <ioreg + 1> for exclusive access. |
| */ |
| if (!request_muxed_region(ioreg, 2, DRVNAME)) |
| return -EBUSY; |
| |
| outb(0x87, ioreg); |
| outb(0x87, ioreg); |
| |
| return 0; |
| } |
| |
| static void superio_exit(struct nct6775_sio_data *sio_data) |
| { |
| int ioreg = sio_data->sioreg; |
| |
| outb(0xaa, ioreg); |
| outb(0x02, ioreg); |
| outb(0x02, ioreg + 1); |
| release_region(ioreg, 2); |
| } |
| |
| static inline void nct6775_wmi_set_bank(struct nct6775_data *data, u16 reg) |
| { |
| u8 bank = reg >> 8; |
| |
| data->bank = bank; |
| } |
| |
| static int nct6775_wmi_reg_read(void *ctx, unsigned int reg, unsigned int *val) |
| { |
| struct nct6775_data *data = ctx; |
| int err, word_sized = nct6775_reg_is_word_sized(data, reg); |
| u8 tmp = 0; |
| u16 res; |
| |
| nct6775_wmi_set_bank(data, reg); |
| |
| err = nct6775_asuswmi_read(data->bank, reg & 0xff, &tmp); |
| if (err) |
| return err; |
| |
| res = tmp; |
| if (word_sized) { |
| err = nct6775_asuswmi_read(data->bank, (reg & 0xff) + 1, &tmp); |
| if (err) |
| return err; |
| |
| res = (res << 8) + tmp; |
| } |
| *val = res; |
| return 0; |
| } |
| |
| static int nct6775_wmi_reg_write(void *ctx, unsigned int reg, unsigned int value) |
| { |
| struct nct6775_data *data = ctx; |
| int res, word_sized = nct6775_reg_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. |
| * Assume that is the case and set the bank number for each access. |
| * Cache the bank number so it only needs to be set if it changes. |
| */ |
| static inline void nct6775_set_bank(struct nct6775_data *data, u16 reg) |
| { |
| u8 bank = reg >> 8; |
| |
| if (data->bank != bank) { |
| outb_p(NCT6775_REG_BANK, data->addr + ADDR_REG_OFFSET); |
| outb_p(bank, data->addr + DATA_REG_OFFSET); |
| data->bank = bank; |
| } |
| } |
| |
| static int nct6775_reg_read(void *ctx, unsigned int reg, unsigned int *val) |
| { |
| struct nct6775_data *data = ctx; |
| int word_sized = nct6775_reg_is_word_sized(data, reg); |
| |
| nct6775_set_bank(data, reg); |
| outb_p(reg & 0xff, data->addr + ADDR_REG_OFFSET); |
| *val = inb_p(data->addr + DATA_REG_OFFSET); |
| if (word_sized) { |
| outb_p((reg & 0xff) + 1, |
| data->addr + ADDR_REG_OFFSET); |
| *val = (*val << 8) + inb_p(data->addr + DATA_REG_OFFSET); |
| } |
| return 0; |
| } |
| |
| static int nct6775_reg_write(void *ctx, unsigned int reg, unsigned int value) |
| { |
| struct nct6775_data *data = ctx; |
| int word_sized = nct6775_reg_is_word_sized(data, reg); |
| |
| nct6775_set_bank(data, reg); |
| outb_p(reg & 0xff, data->addr + ADDR_REG_OFFSET); |
| if (word_sized) { |
| outb_p(value >> 8, data->addr + DATA_REG_OFFSET); |
| outb_p((reg & 0xff) + 1, |
| data->addr + ADDR_REG_OFFSET); |
| } |
| outb_p(value & 0xff, data->addr + DATA_REG_OFFSET); |
| return 0; |
| } |
| |
| static void nct6791_enable_io_mapping(struct nct6775_sio_data *sio_data) |
| { |
| int val; |
| |
| val = sio_data->sio_inb(sio_data, NCT6791_REG_HM_IO_SPACE_LOCK_ENABLE); |
| if (val & 0x10) { |
| pr_info("Enabling hardware monitor logical device mappings.\n"); |
| sio_data->sio_outb(sio_data, NCT6791_REG_HM_IO_SPACE_LOCK_ENABLE, |
| val & ~0x10); |
| } |
| } |
| |
| static int __maybe_unused nct6775_suspend(struct device *dev) |
| { |
| int err; |
| u16 tmp; |
| struct nct6775_data *data = dev_get_drvdata(dev); |
| |
| if (IS_ERR(data)) |
| return PTR_ERR(data); |
| |
| mutex_lock(&data->update_lock); |
| err = nct6775_read_value(data, data->REG_VBAT, &tmp); |
| if (err) |
| goto out; |
| data->vbat = tmp; |
| if (data->kind == nct6775) { |
| err = nct6775_read_value(data, NCT6775_REG_FANDIV1, &tmp); |
| if (err) |
| goto out; |
| data->fandiv1 = tmp; |
| |
| err = nct6775_read_value(data, NCT6775_REG_FANDIV2, &tmp); |
| if (err) |
| goto out; |
| data->fandiv2 = tmp; |
| } |
| out: |
| mutex_unlock(&data->update_lock); |
| |
| return err; |
| } |
| |
| static int __maybe_unused nct6775_resume(struct device *dev) |
| { |
| struct nct6775_data *data = dev_get_drvdata(dev); |
| struct nct6775_sio_data *sio_data = dev_get_platdata(dev); |
| int i, j, err = 0; |
| u8 reg; |
| |
| mutex_lock(&data->update_lock); |
| data->bank = 0xff; /* Force initial bank selection */ |
| |
| err = sio_data->sio_enter(sio_data); |
| if (err) |
| goto abort; |
| |
| sio_data->sio_select(sio_data, NCT6775_LD_HWM); |
| reg = sio_data->sio_inb(sio_data, SIO_REG_ENABLE); |
| if (reg != data->sio_reg_enable) |
| sio_data->sio_outb(sio_data, SIO_REG_ENABLE, data->sio_reg_enable); |
| |
| if (data->kind == nct6791 || data->kind == nct6792 || |
| data->kind == nct6793 || data->kind == nct6795 || |
| data->kind == nct6796 || data->kind == nct6797 || |
| data->kind == nct6798) |
| nct6791_enable_io_mapping(sio_data); |
| |
| sio_data->sio_exit(sio_data); |
| |
| /* Restore limits */ |
| for (i = 0; i < data->in_num; i++) { |
| if (!(data->have_in & BIT(i))) |
| continue; |
| |
| err = nct6775_write_value(data, data->REG_IN_MINMAX[0][i], data->in[i][1]); |
| if (err) |
| goto abort; |
| err = nct6775_write_value(data, data->REG_IN_MINMAX[1][i], data->in[i][2]); |
| if (err) |
| goto abort; |
| } |
| |
| for (i = 0; i < ARRAY_SIZE(data->fan_min); i++) { |
| if (!(data->has_fan_min & BIT(i))) |
| continue; |
| |
| err = nct6775_write_value(data, data->REG_FAN_MIN[i], data->fan_min[i]); |
| if (err) |
| goto abort; |
| } |
| |
| for (i = 0; i < NUM_TEMP; i++) { |
| if (!(data->have_temp & BIT(i))) |
| continue; |
| |
| for (j = 1; j < ARRAY_SIZE(data->reg_temp); j++) |
| if (data->reg_temp[j][i]) { |
| err = nct6775_write_temp(data, data->reg_temp[j][i], |
| data->temp[j][i]); |
| if (err) |
| goto abort; |
| } |
| } |
| |
| /* Restore other settings */ |
| err = nct6775_write_value(data, data->REG_VBAT, data->vbat); |
| if (err) |
| goto abort; |
| if (data->kind == nct6775) { |
| err = nct6775_write_value(data, NCT6775_REG_FANDIV1, data->fandiv1); |
| if (err) |
| goto abort; |
| err = nct6775_write_value(data, NCT6775_REG_FANDIV2, data->fandiv2); |
| } |
| |
| abort: |
| /* Force re-reading all values */ |
| data->valid = false; |
| mutex_unlock(&data->update_lock); |
| |
| return err; |
| } |
| |
| static SIMPLE_DEV_PM_OPS(nct6775_dev_pm_ops, nct6775_suspend, nct6775_resume); |
| |
| static void |
| nct6775_check_fan_inputs(struct nct6775_data *data, struct nct6775_sio_data *sio_data) |
| { |
| bool fan3pin = false, fan4pin = false, fan4min = false; |
| bool fan5pin = false, fan6pin = false, fan7pin = false; |
| bool pwm3pin = false, pwm4pin = false, pwm5pin = false; |
| bool pwm6pin = false, pwm7pin = false; |
| |
| /* Store SIO_REG_ENABLE for use during resume */ |
| sio_data->sio_select(sio_data, NCT6775_LD_HWM); |
| data->sio_reg_enable = sio_data->sio_inb(sio_data, SIO_REG_ENABLE); |
| |
| /* fan4 and fan5 share some pins with the GPIO and serial flash */ |
| if (data->kind == nct6775) { |
| int cr2c = sio_data->sio_inb(sio_data, 0x2c); |
| |
| fan3pin = cr2c & BIT(6); |
| pwm3pin = cr2c & BIT(7); |
| |
| /* On NCT6775, fan4 shares pins with the fdc interface */ |
| fan4pin = !(sio_data->sio_inb(sio_data, 0x2A) & 0x80); |
| } else if (data->kind == nct6776) { |
| bool gpok = sio_data->sio_inb(sio_data, 0x27) & 0x80; |
| const char *board_vendor, *board_name; |
| |
| 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, "ASRock")) { |
| /* |
| * Auxiliary fan monitoring is not enabled on ASRock |
| * Z77 Pro4-M if booted in UEFI Ultra-FastBoot mode. |
| * Observed with BIOS version 2.00. |
| */ |
| if (!strcmp(board_name, "Z77 Pro4-M")) { |
| if ((data->sio_reg_enable & 0xe0) != 0xe0) { |
| data->sio_reg_enable |= 0xe0; |
| sio_data->sio_outb(sio_data, SIO_REG_ENABLE, |
| data->sio_reg_enable); |
| } |
| } |
| } |
| |
| if (data->sio_reg_enable & 0x80) |
| fan3pin = gpok; |
| else |
| fan3pin = !(sio_data->sio_inb(sio_data, 0x24) & 0x40); |
| |
| if (data->sio_reg_enable & 0x40) |
| fan4pin = gpok; |
| else |
| fan4pin = sio_data->sio_inb(sio_data, 0x1C) & 0x01; |
| |
| if (data->sio_reg_enable & 0x20) |
| fan5pin = gpok; |
| else |
| fan5pin = sio_data->sio_inb(sio_data, 0x1C) & 0x02; |
| |
| fan4min = fan4pin; |
| pwm3pin = fan3pin; |
| } else if (data->kind == nct6106) { |
| int cr24 = sio_data->sio_inb(sio_data, 0x24); |
| |
| fan3pin = !(cr24 & 0x80); |
| pwm3pin = cr24 & 0x08; |
| } else if (data->kind == nct6116) { |
| int cr1a = sio_data->sio_inb(sio_data, 0x1a); |
| int cr1b = sio_data->sio_inb(sio_data, 0x1b); |
| int cr24 = sio_data->sio_inb(sio_data, 0x24); |
| int cr2a = sio_data->sio_inb(sio_data, 0x2a); |
| int cr2b = sio_data->sio_inb(sio_data, 0x2b); |
| int cr2f = sio_data->sio_inb(sio_data, 0x2f); |
| |
| fan3pin = !(cr2b & 0x10); |
| fan4pin = (cr2b & 0x80) || // pin 1(2) |
| (!(cr2f & 0x10) && (cr1a & 0x04)); // pin 65(66) |
| fan5pin = (cr2b & 0x80) || // pin 126(127) |
| (!(cr1b & 0x03) && (cr2a & 0x02)); // pin 94(96) |
| |
| pwm3pin = fan3pin && (cr24 & 0x08); |
| pwm4pin = fan4pin; |
| pwm5pin = fan5pin; |
| } else { |
| /* |
| * NCT6779D, NCT6791D, NCT6792D, NCT6793D, NCT6795D, NCT6796D, |
| * NCT6797D, NCT6798D |
| */ |
| int cr1a = sio_data->sio_inb(sio_data, 0x1a); |
| int cr1b = sio_data->sio_inb(sio_data, 0x1b); |
| int cr1c = sio_data->sio_inb(sio_data, 0x1c); |
| int cr1d = sio_data->sio_inb(sio_data, 0x1d); |
| int cr2a = sio_data->sio_inb(sio_data, 0x2a); |
| int cr2b = sio_data->sio_inb(sio_data, 0x2b); |
| int cr2d = sio_data->sio_inb(sio_data, 0x2d); |
| int cr2f = sio_data->sio_inb(sio_data, 0x2f); |
| bool dsw_en = cr2f & BIT(3); |
| bool ddr4_en = cr2f & BIT(4); |
| int cre0; |
| int creb; |
| int cred; |
| |
| sio_data->sio_select(sio_data, NCT6775_LD_12); |
| cre0 = sio_data->sio_inb(sio_data, 0xe0); |
| creb = sio_data->sio_inb(sio_data, 0xeb); |
| cred = sio_data->sio_inb(sio_data, 0xed); |
| |
| fan3pin = !(cr1c & BIT(5)); |
| fan4pin = !(cr1c & BIT(6)); |
| fan5pin = !(cr1c & BIT(7)); |
| |
| pwm3pin = !(cr1c & BIT(0)); |
| pwm4pin = !(cr1c & BIT(1)); |
| pwm5pin = !(cr1c & BIT(2)); |
| |
| switch (data->kind) { |
| case nct6791: |
| fan6pin = cr2d & BIT(1); |
| pwm6pin = cr2d & BIT(0); |
| break; |
| case nct6792: |
| fan6pin = !dsw_en && (cr2d & BIT(1)); |
| pwm6pin = !dsw_en && (cr2d & BIT(0)); |
| break; |
| case nct6793: |
| fan5pin |= cr1b & BIT(5); |
| fan5pin |= creb & BIT(5); |
| |
| fan6pin = !dsw_en && (cr2d & BIT(1)); |
| fan6pin |= creb & BIT(3); |
| |
| pwm5pin |= cr2d & BIT(7); |
| pwm5pin |= (creb & BIT(4)) && !(cr2a & BIT(0)); |
| |
| pwm6pin = !dsw_en && (cr2d & BIT(0)); |
| pwm6pin |= creb & BIT(2); |
| break; |
| case nct6795: |
| fan5pin |= cr1b & BIT(5); |
| fan5pin |= creb & BIT(5); |
| |
| fan6pin = (cr2a & BIT(4)) && |
| (!dsw_en || (cred & BIT(4))); |
| fan6pin |= creb & BIT(3); |
| |
| pwm5pin |= cr2d & BIT(7); |
| pwm5pin |= (creb & BIT(4)) && !(cr2a & BIT(0)); |
| |
| pwm6pin = (cr2a & BIT(3)) && (cred & BIT(2)); |
| pwm6pin |= creb & BIT(2); |
| break; |
| case nct6796: |
| fan5pin |= cr1b & BIT(5); |
| fan5pin |= (cre0 & BIT(3)) && !(cr1b & BIT(0)); |
| fan5pin |= creb & BIT(5); |
| |
| fan6pin = (cr2a & BIT(4)) && |
| (!dsw_en || (cred & BIT(4))); |
| fan6pin |= creb & BIT(3); |
| |
| fan7pin = !(cr2b & BIT(2)); |
| |
| pwm5pin |= cr2d & BIT(7); |
| pwm5pin |= (cre0 & BIT(4)) && !(cr1b & BIT(0)); |
| pwm5pin |= (creb & BIT(4)) && !(cr2a & BIT(0)); |
| |
| pwm6pin = (cr2a & BIT(3)) && (cred & BIT(2)); |
| pwm6pin |= creb & BIT(2); |
| |
| pwm7pin = !(cr1d & (BIT(2) | BIT(3))); |
| break; |
| case nct6797: |
| fan5pin |= !ddr4_en && (cr1b & BIT(5)); |
| fan5pin |= creb & BIT(5); |
| |
| fan6pin = cr2a & BIT(4); |
| fan6pin |= creb & BIT(3); |
| |
| fan7pin = cr1a & BIT(1); |
| |
| pwm5pin |= (creb & BIT(4)) && !(cr2a & BIT(0)); |
| pwm5pin |= !ddr4_en && (cr2d & BIT(7)); |
| |
| pwm6pin = creb & BIT(2); |
| pwm6pin |= cred & BIT(2); |
| |
| pwm7pin = cr1d & BIT(4); |
| break; |
| case nct6798: |
| fan6pin = !(cr1b & BIT(0)) && (cre0 & BIT(3)); |
| fan6pin |= cr2a & BIT(4); |
| fan6pin |= creb & BIT(5); |
| |
| fan7pin = cr1b & BIT(5); |
| fan7pin |= !(cr2b & BIT(2)); |
| fan7pin |= creb & BIT(3); |
| |
| pwm6pin = !(cr1b & BIT(0)) && (cre0 & BIT(4)); |
| pwm6pin |= !(cred & BIT(2)) && (cr2a & BIT(3)); |
| pwm6pin |= (creb & BIT(4)) && !(cr2a & BIT(0)); |
| |
| pwm7pin = !(cr1d & (BIT(2) | BIT(3))); |
| pwm7pin |= cr2d & BIT(7); |
| pwm7pin |= creb & BIT(2); |
| break; |
| default: /* NCT6779D */ |
| break; |
| } |
| |
| fan4min = fan4pin; |
| } |
| |
| /* fan 1 and 2 (0x03) are always present */ |
| data->has_fan = 0x03 | (fan3pin << 2) | (fan4pin << 3) | |
| (fan5pin << 4) | (fan6pin << 5) | (fan7pin << 6); |
| data->has_fan_min = 0x03 | (fan3pin << 2) | (fan4min << 3) | |
| (fan5pin << 4) | (fan6pin << 5) | (fan7pin << 6); |
| data->has_pwm = 0x03 | (pwm3pin << 2) | (pwm4pin << 3) | |
| (pwm5pin << 4) | (pwm6pin << 5) | (pwm7pin << 6); |
| } |
| |
| static ssize_t |
| cpu0_vid_show(struct device *dev, struct device_attribute *attr, char *buf) |
| { |
| struct nct6775_data *data = dev_get_drvdata(dev); |
| |
| return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm)); |
| } |
| |
| static DEVICE_ATTR_RO(cpu0_vid); |
| |
| /* Case open detection */ |
| |
| static const u8 NCT6775_REG_CR_CASEOPEN_CLR[] = { 0xe6, 0xee }; |
| static const u8 NCT6775_CR_CASEOPEN_CLR_MASK[] = { 0x20, 0x01 }; |
| |
| static ssize_t |
| clear_caseopen(struct device *dev, struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| struct nct6775_data *data = dev_get_drvdata(dev); |
| struct nct6775_sio_data *sio_data = data->driver_data; |
| int nr = to_sensor_dev_attr(attr)->index - INTRUSION_ALARM_BASE; |
| unsigned long val; |
| u8 reg; |
| int ret; |
| |
| if (kstrtoul(buf, 10, &val) || val != 0) |
| return -EINVAL; |
| |
| mutex_lock(&data->update_lock); |
| |
| /* |
| * Use CR registers to clear caseopen status. |
| * The CR registers are the same for all chips, and not all chips |
| * support clearing the caseopen status through "regular" registers. |
| */ |
| ret = sio_data->sio_enter(sio_data); |
| if (ret) { |
| count = ret; |
| goto error; |
| } |
| |
| sio_data->sio_select(sio_data, NCT6775_LD_ACPI); |
| reg = sio_data->sio_inb(sio_data, NCT6775_REG_CR_CASEOPEN_CLR[nr]); |
| reg |= NCT6775_CR_CASEOPEN_CLR_MASK[nr]; |
| sio_data->sio_outb(sio_data, NCT6775_REG_CR_CASEOPEN_CLR[nr], reg); |
| reg &= ~NCT6775_CR_CASEOPEN_CLR_MASK[nr]; |
| sio_data->sio_outb(sio_data, NCT6775_REG_CR_CASEOPEN_CLR[nr], reg); |
| sio_data->sio_exit(sio_data); |
| |
| data->valid = false; /* Force cache refresh */ |
| error: |
| mutex_unlock(&data->update_lock); |
| return count; |
| } |
| |
| static SENSOR_DEVICE_ATTR(intrusion0_alarm, 0644, nct6775_show_alarm, |
| clear_caseopen, INTRUSION_ALARM_BASE); |
| static SENSOR_DEVICE_ATTR(intrusion1_alarm, 0644, nct6775_show_alarm, |
| clear_caseopen, INTRUSION_ALARM_BASE + 1); |
| static SENSOR_DEVICE_ATTR(intrusion0_beep, 0644, nct6775_show_beep, |
| nct6775_store_beep, INTRUSION_ALARM_BASE); |
| static SENSOR_DEVICE_ATTR(intrusion1_beep, 0644, nct6775_show_beep, |
| nct6775_store_beep, INTRUSION_ALARM_BASE + 1); |
| static SENSOR_DEVICE_ATTR(beep_enable, 0644, nct6775_show_beep, |
| nct6775_store_beep, BEEP_ENABLE_BASE); |
| |
| static umode_t nct6775_other_is_visible(struct kobject *kobj, |
| struct attribute *attr, int index) |
| { |
| struct device *dev = kobj_to_dev(kobj); |
| struct nct6775_data *data = dev_get_drvdata(dev); |
| |
| if (index == 0 && !data->have_vid) |
| return 0; |
| |
| if (index == 1 || index == 2) { |
| if (data->ALARM_BITS[INTRUSION_ALARM_BASE + index - 1] < 0) |
| return 0; |
| } |
| |
| if (index == 3 || index == 4) { |
| if (data->BEEP_BITS[INTRUSION_ALARM_BASE + index - 3] < 0) |
| return 0; |
| } |
| |
| return nct6775_attr_mode(data, attr); |
| } |
| |
| /* |
| * nct6775_other_is_visible uses the index into the following array |
| * to determine if attributes should be created or not. |
| * Any change in order or content must be matched. |
| */ |
| static struct attribute *nct6775_attributes_other[] = { |
| &dev_attr_cpu0_vid.attr, /* 0 */ |
| &sensor_dev_attr_intrusion0_alarm.dev_attr.attr, /* 1 */ |
| &sensor_dev_attr_intrusion1_alarm.dev_attr.attr, /* 2 */ |
| &sensor_dev_attr_intrusion0_beep.dev_attr.attr, /* 3 */ |
| &sensor_dev_attr_intrusion1_beep.dev_attr.attr, /* 4 */ |
| &sensor_dev_attr_beep_enable.dev_attr.attr, /* 5 */ |
| |
| NULL |
| }; |
| |
| static const struct attribute_group nct6775_group_other = { |
| .attrs = nct6775_attributes_other, |
| .is_visible = nct6775_other_is_visible, |
| }; |
| |
| static int nct6775_platform_probe_init(struct nct6775_data *data) |
| { |
| int err; |
| u8 cr2a; |
| struct nct6775_sio_data *sio_data = data->driver_data; |
| |
| err = sio_data->sio_enter(sio_data); |
| if (err) |
| return err; |
| |
| cr2a = sio_data->sio_inb(sio_data, 0x2a); |
| switch (data->kind) { |
| case nct6775: |
| data->have_vid = (cr2a & 0x40); |
| break; |
| case nct6776: |
| data->have_vid = (cr2a & 0x60) == 0x40; |
| break; |
| case nct6106: |
| case nct6116: |
| case nct6779: |
| case nct6791: |
| case nct6792: |
| case nct6793: |
| case nct6795: |
| case nct6796: |
| case nct6797: |
| case nct6798: |
| break; |
| } |
| |
| /* |
| * Read VID value |
| * We can get the VID input values directly at logical device D 0xe3. |
| */ |
| if (data->have_vid) { |
| sio_data->sio_select(sio_data, NCT6775_LD_VID); |
| data->vid = sio_data->sio_inb(sio_data, 0xe3); |
| data->vrm = vid_which_vrm(); |
| } |
| |
| if (fan_debounce) { |
| u8 tmp; |
| |
| sio_data->sio_select(sio_data, NCT6775_LD_HWM); |
| tmp = sio_data->sio_inb(sio_data, |
| NCT6775_REG_CR_FAN_DEBOUNCE); |
| switch (data->kind) { |
| case nct6106: |
| case nct6116: |
| tmp |= 0xe0; |
| break; |
| case nct6775: |
| tmp |= 0x1e; |
| break; |
| case nct6776: |
| case nct6779: |
| tmp |= 0x3e; |
| break; |
| case nct6791: |
| case nct6792: |
| case nct6793: |
| case nct6795: |
| case nct6796: |
| case nct6797: |
| case nct6798: |
| tmp |= 0x7e; |
| break; |
| } |
| sio_data->sio_outb(sio_data, NCT6775_REG_CR_FAN_DEBOUNCE, |
| tmp); |
| pr_info("Enabled fan debounce for chip %s\n", data->name); |
| } |
| |
| nct6775_check_fan_inputs(data, sio_data); |
| |
| sio_data->sio_exit(sio_data); |
| |
| return nct6775_add_attr_group(data, &nct6775_group_other); |
| } |
| |
| static const struct regmap_config nct6775_regmap_config = { |
| .reg_bits = 16, |
| .val_bits = 16, |
| .reg_read = nct6775_reg_read, |
| .reg_write = nct6775_reg_write, |
| }; |
| |
| static const struct regmap_config nct6775_wmi_regmap_config = { |
| .reg_bits = 16, |
| .val_bits = 16, |
| .reg_read = nct6775_wmi_reg_read, |
| .reg_write = nct6775_wmi_reg_write, |
| }; |
| |
| static int nct6775_platform_probe(struct platform_device *pdev) |
| { |
| struct device *dev = &pdev->dev; |
| struct nct6775_sio_data *sio_data = dev_get_platdata(dev); |
| struct nct6775_data *data; |
| struct resource *res; |
| const struct regmap_config *regmapcfg; |
| |
| 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(*data), GFP_KERNEL); |
| if (!data) |
| return -ENOMEM; |
| |
| data->kind = sio_data->kind; |
| data->sioreg = sio_data->sioreg; |
| |
| if (sio_data->access == access_direct) { |
| data->addr = res->start; |
| regmapcfg = &nct6775_regmap_config; |
| } else { |
| regmapcfg = &nct6775_wmi_regmap_config; |
| } |
| |
| platform_set_drvdata(pdev, data); |
| |
| data->driver_data = sio_data; |
| data->driver_init = nct6775_platform_probe_init; |
| |
| return nct6775_probe(&pdev->dev, data, regmapcfg); |
| } |
| |
| static struct platform_driver nct6775_driver = { |
| .driver = { |
| .name = DRVNAME, |
| .pm = &nct6775_dev_pm_ops, |
| }, |
| .probe = nct6775_platform_probe, |
| }; |
| |
| /* nct6775_find() looks for a '627 in the Super-I/O config space */ |
| static int __init nct6775_find(int sioaddr, struct nct6775_sio_data *sio_data) |
| { |
| u16 val; |
| int err; |
| int addr; |
| |
| sio_data->access = access_direct; |
| sio_data->sioreg = sioaddr; |
| |
| err = sio_data->sio_enter(sio_data); |
| if (err) |
| return err; |
| |
| val = (sio_data->sio_inb(sio_data, SIO_REG_DEVID) << 8) | |
| sio_data->sio_inb(sio_data, SIO_REG_DEVID + 1); |
| if (force_id && val != 0xffff) |
| val = force_id; |
| |
| switch (val & SIO_ID_MASK) { |
| case SIO_NCT6106_ID: |
| sio_data->kind = nct6106; |
| break; |
| case SIO_NCT6116_ID: |
| sio_data->kind = nct6116; |
| break; |
| case SIO_NCT6775_ID: |
| sio_data->kind = nct6775; |
| break; |
| case SIO_NCT6776_ID: |
| sio_data->kind = nct6776; |
| break; |
| case SIO_NCT6779_ID: |
| sio_data->kind = nct6779; |
| break; |
| case SIO_NCT6791_ID: |
| sio_data->kind = nct6791; |
| break; |
| case SIO_NCT6792_ID: |
| sio_data->kind = nct6792; |
| break; |
| case SIO_NCT6793_ID: |
| sio_data->kind = nct6793; |
| break; |
| case SIO_NCT6795_ID: |
| sio_data->kind = nct6795; |
| break; |
| case SIO_NCT6796_ID: |
| sio_data->kind = nct6796; |
| break; |
| case SIO_NCT6797_ID: |
| sio_data->kind = nct6797; |
| break; |
| case SIO_NCT6798_ID: |
| sio_data->kind = nct6798; |
| break; |
| default: |
| if (val != 0xffff) |
| pr_debug("unsupported chip ID: 0x%04x\n", val); |
| sio_data->sio_exit(sio_data); |
| return -ENODEV; |
| } |
| |
| /* We have a known chip, find the HWM I/O address */ |
| sio_data->sio_select(sio_data, NCT6775_LD_HWM); |
| val = (sio_data->sio_inb(sio_data, SIO_REG_ADDR) << 8) |
| | sio_data->sio_inb(sio_data, SIO_REG_ADDR + 1); |
| addr = val & IOREGION_ALIGNMENT; |
| if (addr == 0) { |
| pr_err("Refusing to enable a Super-I/O device with a base I/O port 0\n"); |
| sio_data->sio_exit(sio_data); |
| return -ENODEV; |
| } |
| |
| /* Activate logical device if needed */ |
| val = sio_data->sio_inb(sio_data, SIO_REG_ENABLE); |
| if (!(val & 0x01)) { |
| pr_warn("Forcibly enabling Super-I/O. Sensor is probably unusable.\n"); |
| sio_data->sio_outb(sio_data, SIO_REG_ENABLE, val | 0x01); |
| } |
| |
| if (sio_data->kind == nct6791 || sio_data->kind == nct6792 || |
| sio_data->kind == nct6793 || sio_data->kind == nct6795 || |
| sio_data->kind == nct6796 || sio_data->kind == nct6797 || |
| sio_data->kind == nct6798) |
| nct6791_enable_io_mapping(sio_data); |
| |
| sio_data->sio_exit(sio_data); |
| pr_info("Found %s or compatible chip at %#x:%#x\n", |
| nct6775_sio_names[sio_data->kind], sioaddr, addr); |
| |
| return addr; |
| } |
| |
| /* |
| * when Super-I/O functions move to a separate file, the Super-I/O |
| * bus will manage the lifetime of the device and this module will only keep |
| * track of the nct6775 driver. But since we use platform_device_alloc(), we |
| * must keep track of the device |
| */ |
| static struct platform_device *pdev[2]; |
| |
| static const char * const asus_wmi_boards[] = { |
| "PRO H410T", |
| "ProArt X570-CREATOR WIFI", |
| "Pro B550M-C", |
| "Pro WS X570-ACE", |
| "PRIME B360-PLUS", |
| "PRIME B460-PLUS", |
| "PRIME B550-PLUS", |
| "PRIME B550M-A", |
| "PRIME B550M-A (WI-FI)", |
| "PRIME H410M-R", |
| "PRIME X570-P", |
| "PRIME X570-PRO", |
| "ROG CROSSHAIR VIII DARK HERO", |
| "ROG CROSSHAIR VIII FORMULA", |
| "ROG CROSSHAIR VIII HERO", |
| "ROG CROSSHAIR VIII IMPACT", |
| "ROG STRIX B550-A GAMING", |
| "ROG STRIX B550-E GAMING", |
| "ROG STRIX B550-F GAMING", |
| "ROG STRIX B550-F GAMING (WI-FI)", |
| "ROG STRIX B550-F GAMING WIFI II", |
| "ROG STRIX B550-I GAMING", |
| "ROG STRIX B550-XE GAMING (WI-FI)", |
| "ROG STRIX X570-E GAMING", |
| "ROG STRIX X570-E GAMING WIFI II", |
| "ROG STRIX X570-F GAMING", |
| "ROG STRIX X570-I GAMING", |
| "ROG STRIX Z390-E GAMING", |
| "ROG STRIX Z390-F GAMING", |
| "ROG STRIX Z390-H GAMING", |
| "ROG STRIX Z390-I GAMING", |
| "ROG STRIX Z490-A GAMING", |
| "ROG STRIX Z490-E GAMING", |
| "ROG STRIX Z490-F GAMING", |
| "ROG STRIX Z490-G GAMING", |
| "ROG STRIX Z490-G GAMING (WI-FI)", |
| "ROG STRIX Z490-H GAMING", |
| "ROG STRIX Z490-I GAMING", |
| "TUF GAMING B550M-PLUS", |
| "TUF GAMING B550M-PLUS (WI-FI)", |
| "TUF GAMING B550-PLUS", |
| "TUF GAMING B550-PRO", |
| "TUF GAMING X570-PLUS", |
| "TUF GAMING X570-PLUS (WI-FI)", |
| "TUF GAMING X570-PRO (WI-FI)", |
| "TUF GAMING Z490-PLUS", |
| "TUF GAMING Z490-PLUS (WI-FI)", |
| }; |
| |
| static int __init sensors_nct6775_platform_init(void) |
| { |
| int i, err; |
| bool found = false; |
| int address; |
| 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) && 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. |
| * |
| * when Super-I/O functions move to a separate file, the Super-I/O |
| * driver will probe 0x2e and 0x4e and auto-detect the presence of a |
| * nct6775 hardware monitor, and call probe() |
| */ |
| for (i = 0; i < ARRAY_SIZE(pdev); i++) { |
| sio_data.sio_outb = superio_outb; |
| sio_data.sio_inb = superio_inb; |
| sio_data.sio_select = superio_select; |
| sio_data.sio_enter = superio_enter; |
| sio_data.sio_exit = superio_exit; |
| |
| address = nct6775_find(sioaddr[i], &sio_data); |
| if (address <= 0) |
| continue; |
| |
| 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; |
| goto exit_device_unregister; |
| } |
| |
| err = platform_device_add_data(pdev[i], &sio_data, |
| sizeof(struct nct6775_sio_data)); |
| if (err) |
| goto exit_device_put; |
| |
| 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 = 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) |
| goto exit_device_put; |
| } |
| if (!found) { |
| err = -ENODEV; |
| goto exit_unregister; |
| } |
| |
| return 0; |
| |
| exit_device_put: |
| platform_device_put(pdev[i]); |
| exit_device_unregister: |
| while (--i >= 0) { |
| if (pdev[i]) |
| platform_device_unregister(pdev[i]); |
| } |
| exit_unregister: |
| platform_driver_unregister(&nct6775_driver); |
| return err; |
| } |
| |
| static void __exit sensors_nct6775_platform_exit(void) |
| { |
| int i; |
| |
| for (i = 0; i < ARRAY_SIZE(pdev); i++) { |
| if (pdev[i]) |
| platform_device_unregister(pdev[i]); |
| } |
| platform_driver_unregister(&nct6775_driver); |
| } |
| |
| MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>"); |
| MODULE_DESCRIPTION("Platform driver for NCT6775F and compatible chips"); |
| MODULE_LICENSE("GPL"); |
| MODULE_IMPORT_NS(HWMON_NCT6775); |
| |
| module_init(sensors_nct6775_platform_init); |
| module_exit(sensors_nct6775_platform_exit); |
