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![amy.shih](/assets/img/avatar_default.png)
Voltage sensors overlap with external temperature sensors. Detect the multi-function of voltage, thermal diode, thermistor and reserved from register VT_ADC_MD_REG to set value of vsen_mask & tcpu_mask & temp_mode in nct7904_data struct. If the value is reserved, needs to disable the vsen_mask & tcpu_mask. Signed-off-by: amy.shih <amy.shih@advantech.com.tw> Link: https://lore.kernel.org/r/20191014082451.2895-1-Amy.Shih@advantech.com.tw Signed-off-by: Guenter Roeck <linux@roeck-us.net>
1018 lines
26 KiB
C
1018 lines
26 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* nct7904.c - driver for Nuvoton NCT7904D.
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*
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* Copyright (c) 2015 Kontron
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* Author: Vadim V. Vlasov <vvlasov@dev.rtsoft.ru>
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*
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* Copyright (c) 2019 Advantech
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* Author: Amy.Shih <amy.shih@advantech.com.tw>
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*/
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#include <linux/module.h>
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#include <linux/device.h>
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#include <linux/init.h>
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#include <linux/i2c.h>
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#include <linux/mutex.h>
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#include <linux/hwmon.h>
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#define VENDOR_ID_REG 0x7A /* Any bank */
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#define NUVOTON_ID 0x50
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#define CHIP_ID_REG 0x7B /* Any bank */
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#define NCT7904_ID 0xC5
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#define DEVICE_ID_REG 0x7C /* Any bank */
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#define BANK_SEL_REG 0xFF
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#define BANK_0 0x00
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#define BANK_1 0x01
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#define BANK_2 0x02
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#define BANK_3 0x03
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#define BANK_4 0x04
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#define BANK_MAX 0x04
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#define FANIN_MAX 12 /* Counted from 1 */
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#define VSEN_MAX 21 /* VSEN1..14, 3VDD, VBAT, V3VSB,
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LTD (not a voltage), VSEN17..19 */
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#define FANCTL_MAX 4 /* Counted from 1 */
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#define TCPU_MAX 8 /* Counted from 1 */
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#define TEMP_MAX 4 /* Counted from 1 */
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#define VT_ADC_CTRL0_REG 0x20 /* Bank 0 */
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#define VT_ADC_CTRL1_REG 0x21 /* Bank 0 */
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#define VT_ADC_CTRL2_REG 0x22 /* Bank 0 */
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#define FANIN_CTRL0_REG 0x24
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#define FANIN_CTRL1_REG 0x25
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#define DTS_T_CTRL0_REG 0x26
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#define DTS_T_CTRL1_REG 0x27
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#define VT_ADC_MD_REG 0x2E
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#define VSEN1_HV_LL_REG 0x02 /* Bank 1; 2 regs (HV/LV) per sensor */
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#define VSEN1_LV_LL_REG 0x03 /* Bank 1; 2 regs (HV/LV) per sensor */
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#define VSEN1_HV_HL_REG 0x00 /* Bank 1; 2 regs (HV/LV) per sensor */
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#define VSEN1_LV_HL_REG 0x01 /* Bank 1; 2 regs (HV/LV) per sensor */
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#define SMI_STS1_REG 0xC1 /* Bank 0; SMI Status Register */
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#define SMI_STS3_REG 0xC3 /* Bank 0; SMI Status Register */
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#define SMI_STS5_REG 0xC5 /* Bank 0; SMI Status Register */
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#define SMI_STS7_REG 0xC7 /* Bank 0; SMI Status Register */
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#define SMI_STS8_REG 0xC8 /* Bank 0; SMI Status Register */
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#define VSEN1_HV_REG 0x40 /* Bank 0; 2 regs (HV/LV) per sensor */
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#define TEMP_CH1_HV_REG 0x42 /* Bank 0; same as VSEN2_HV */
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#define LTD_HV_REG 0x62 /* Bank 0; 2 regs in VSEN range */
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#define LTD_HV_HL_REG 0x44 /* Bank 1; 1 reg for LTD */
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#define LTD_LV_HL_REG 0x45 /* Bank 1; 1 reg for LTD */
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#define LTD_HV_LL_REG 0x46 /* Bank 1; 1 reg for LTD */
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#define LTD_LV_LL_REG 0x47 /* Bank 1; 1 reg for LTD */
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#define TEMP_CH1_CH_REG 0x05 /* Bank 1; 1 reg for LTD */
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#define TEMP_CH1_W_REG 0x06 /* Bank 1; 1 reg for LTD */
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#define TEMP_CH1_WH_REG 0x07 /* Bank 1; 1 reg for LTD */
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#define TEMP_CH1_C_REG 0x04 /* Bank 1; 1 reg per sensor */
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#define DTS_T_CPU1_C_REG 0x90 /* Bank 1; 1 reg per sensor */
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#define DTS_T_CPU1_CH_REG 0x91 /* Bank 1; 1 reg per sensor */
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#define DTS_T_CPU1_W_REG 0x92 /* Bank 1; 1 reg per sensor */
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#define DTS_T_CPU1_WH_REG 0x93 /* Bank 1; 1 reg per sensor */
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#define FANIN1_HV_REG 0x80 /* Bank 0; 2 regs (HV/LV) per sensor */
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#define FANIN1_HV_HL_REG 0x60 /* Bank 1; 2 regs (HV/LV) per sensor */
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#define FANIN1_LV_HL_REG 0x61 /* Bank 1; 2 regs (HV/LV) per sensor */
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#define T_CPU1_HV_REG 0xA0 /* Bank 0; 2 regs (HV/LV) per sensor */
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#define PRTS_REG 0x03 /* Bank 2 */
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#define PFE_REG 0x00 /* Bank 2; PECI Function Enable */
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#define TSI_CTRL_REG 0x50 /* Bank 2; TSI Control Register */
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#define FANCTL1_FMR_REG 0x00 /* Bank 3; 1 reg per channel */
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#define FANCTL1_OUT_REG 0x10 /* Bank 3; 1 reg per channel */
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#define VOLT_MONITOR_MODE 0x0
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#define THERMAL_DIODE_MODE 0x1
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#define THERMISTOR_MODE 0x3
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#define ENABLE_TSI BIT(1)
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static const unsigned short normal_i2c[] = {
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0x2d, 0x2e, I2C_CLIENT_END
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};
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struct nct7904_data {
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struct i2c_client *client;
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struct mutex bank_lock;
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int bank_sel;
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u32 fanin_mask;
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u32 vsen_mask;
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u32 tcpu_mask;
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u8 fan_mode[FANCTL_MAX];
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u8 enable_dts;
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u8 has_dts;
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u8 temp_mode; /* 0: TR mode, 1: TD mode */
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u8 fan_alarm[2];
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u8 vsen_alarm[3];
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};
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/* Access functions */
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static int nct7904_bank_lock(struct nct7904_data *data, unsigned int bank)
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{
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int ret;
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mutex_lock(&data->bank_lock);
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if (data->bank_sel == bank)
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return 0;
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ret = i2c_smbus_write_byte_data(data->client, BANK_SEL_REG, bank);
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if (ret == 0)
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data->bank_sel = bank;
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else
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data->bank_sel = -1;
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return ret;
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}
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static inline void nct7904_bank_release(struct nct7904_data *data)
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{
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mutex_unlock(&data->bank_lock);
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}
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/* Read 1-byte register. Returns unsigned reg or -ERRNO on error. */
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static int nct7904_read_reg(struct nct7904_data *data,
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unsigned int bank, unsigned int reg)
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{
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struct i2c_client *client = data->client;
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int ret;
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ret = nct7904_bank_lock(data, bank);
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if (ret == 0)
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ret = i2c_smbus_read_byte_data(client, reg);
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nct7904_bank_release(data);
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return ret;
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}
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/*
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* Read 2-byte register. Returns register in big-endian format or
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* -ERRNO on error.
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*/
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static int nct7904_read_reg16(struct nct7904_data *data,
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unsigned int bank, unsigned int reg)
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{
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struct i2c_client *client = data->client;
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int ret, hi;
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ret = nct7904_bank_lock(data, bank);
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if (ret == 0) {
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ret = i2c_smbus_read_byte_data(client, reg);
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if (ret >= 0) {
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hi = ret;
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ret = i2c_smbus_read_byte_data(client, reg + 1);
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if (ret >= 0)
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ret |= hi << 8;
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}
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}
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nct7904_bank_release(data);
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return ret;
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}
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/* Write 1-byte register. Returns 0 or -ERRNO on error. */
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static int nct7904_write_reg(struct nct7904_data *data,
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unsigned int bank, unsigned int reg, u8 val)
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{
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struct i2c_client *client = data->client;
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int ret;
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ret = nct7904_bank_lock(data, bank);
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if (ret == 0)
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ret = i2c_smbus_write_byte_data(client, reg, val);
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nct7904_bank_release(data);
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return ret;
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}
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static int nct7904_read_fan(struct device *dev, u32 attr, int channel,
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long *val)
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{
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struct nct7904_data *data = dev_get_drvdata(dev);
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unsigned int cnt, rpm;
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int ret;
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switch (attr) {
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case hwmon_fan_input:
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ret = nct7904_read_reg16(data, BANK_0,
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FANIN1_HV_REG + channel * 2);
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if (ret < 0)
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return ret;
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cnt = ((ret & 0xff00) >> 3) | (ret & 0x1f);
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if (cnt == 0x1fff)
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rpm = 0;
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else
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rpm = 1350000 / cnt;
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*val = rpm;
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return 0;
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case hwmon_fan_min:
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ret = nct7904_read_reg16(data, BANK_1,
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FANIN1_HV_HL_REG + channel * 2);
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if (ret < 0)
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return ret;
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cnt = ((ret & 0xff00) >> 3) | (ret & 0x1f);
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if (cnt == 0x1fff)
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rpm = 0;
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else
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rpm = 1350000 / cnt;
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*val = rpm;
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return 0;
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case hwmon_fan_alarm:
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ret = nct7904_read_reg(data, BANK_0,
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SMI_STS5_REG + (channel >> 3));
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if (ret < 0)
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return ret;
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if (!data->fan_alarm[channel >> 3])
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data->fan_alarm[channel >> 3] = ret & 0xff;
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else
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/* If there is new alarm showing up */
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data->fan_alarm[channel >> 3] |= (ret & 0xff);
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*val = (data->fan_alarm[channel >> 3] >> (channel & 0x07)) & 1;
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/* Needs to clean the alarm if alarm existing */
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if (*val)
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data->fan_alarm[channel >> 3] ^= 1 << (channel & 0x07);
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return 0;
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default:
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return -EOPNOTSUPP;
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}
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}
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static umode_t nct7904_fan_is_visible(const void *_data, u32 attr, int channel)
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{
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const struct nct7904_data *data = _data;
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switch (attr) {
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case hwmon_fan_input:
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case hwmon_fan_alarm:
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if (data->fanin_mask & (1 << channel))
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return 0444;
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break;
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case hwmon_fan_min:
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if (data->fanin_mask & (1 << channel))
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return 0644;
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break;
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default:
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break;
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}
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return 0;
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}
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static u8 nct7904_chan_to_index[] = {
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0, /* Not used */
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0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
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18, 19, 20, 16
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};
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static int nct7904_read_in(struct device *dev, u32 attr, int channel,
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long *val)
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{
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struct nct7904_data *data = dev_get_drvdata(dev);
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int ret, volt, index;
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index = nct7904_chan_to_index[channel];
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switch (attr) {
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case hwmon_in_input:
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ret = nct7904_read_reg16(data, BANK_0,
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VSEN1_HV_REG + index * 2);
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if (ret < 0)
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return ret;
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volt = ((ret & 0xff00) >> 5) | (ret & 0x7);
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if (index < 14)
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volt *= 2; /* 0.002V scale */
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else
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volt *= 6; /* 0.006V scale */
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*val = volt;
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return 0;
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case hwmon_in_min:
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ret = nct7904_read_reg16(data, BANK_1,
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VSEN1_HV_LL_REG + index * 4);
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if (ret < 0)
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return ret;
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volt = ((ret & 0xff00) >> 5) | (ret & 0x7);
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if (index < 14)
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volt *= 2; /* 0.002V scale */
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else
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volt *= 6; /* 0.006V scale */
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*val = volt;
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return 0;
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case hwmon_in_max:
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ret = nct7904_read_reg16(data, BANK_1,
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VSEN1_HV_HL_REG + index * 4);
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if (ret < 0)
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return ret;
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volt = ((ret & 0xff00) >> 5) | (ret & 0x7);
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if (index < 14)
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volt *= 2; /* 0.002V scale */
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else
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volt *= 6; /* 0.006V scale */
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*val = volt;
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return 0;
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case hwmon_in_alarm:
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ret = nct7904_read_reg(data, BANK_0,
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SMI_STS1_REG + (index >> 3));
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if (ret < 0)
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return ret;
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if (!data->vsen_alarm[index >> 3])
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data->vsen_alarm[index >> 3] = ret & 0xff;
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else
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/* If there is new alarm showing up */
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data->vsen_alarm[index >> 3] |= (ret & 0xff);
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*val = (data->vsen_alarm[index >> 3] >> (index & 0x07)) & 1;
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/* Needs to clean the alarm if alarm existing */
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if (*val)
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data->vsen_alarm[index >> 3] ^= 1 << (index & 0x07);
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return 0;
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default:
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return -EOPNOTSUPP;
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}
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}
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static umode_t nct7904_in_is_visible(const void *_data, u32 attr, int channel)
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{
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const struct nct7904_data *data = _data;
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int index = nct7904_chan_to_index[channel];
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switch (attr) {
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case hwmon_in_input:
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case hwmon_in_alarm:
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if (channel > 0 && (data->vsen_mask & BIT(index)))
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return 0444;
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break;
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case hwmon_in_min:
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case hwmon_in_max:
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if (channel > 0 && (data->vsen_mask & BIT(index)))
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return 0644;
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break;
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default:
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break;
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}
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return 0;
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}
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static int nct7904_read_temp(struct device *dev, u32 attr, int channel,
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long *val)
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{
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struct nct7904_data *data = dev_get_drvdata(dev);
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int ret, temp;
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unsigned int reg1, reg2, reg3;
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switch (attr) {
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case hwmon_temp_input:
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if (channel == 4)
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ret = nct7904_read_reg16(data, BANK_0, LTD_HV_REG);
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else if (channel < 5)
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ret = nct7904_read_reg16(data, BANK_0,
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TEMP_CH1_HV_REG + channel * 4);
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else
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ret = nct7904_read_reg16(data, BANK_0,
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T_CPU1_HV_REG + (channel - 5)
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* 2);
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if (ret < 0)
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return ret;
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temp = ((ret & 0xff00) >> 5) | (ret & 0x7);
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*val = sign_extend32(temp, 10) * 125;
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return 0;
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case hwmon_temp_alarm:
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if (channel == 4) {
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ret = nct7904_read_reg(data, BANK_0,
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SMI_STS3_REG);
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if (ret < 0)
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return ret;
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*val = (ret >> 1) & 1;
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} else if (channel < 4) {
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ret = nct7904_read_reg(data, BANK_0,
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SMI_STS1_REG);
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if (ret < 0)
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return ret;
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*val = (ret >> (((channel * 2) + 1) & 0x07)) & 1;
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} else {
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if ((channel - 5) < 4) {
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ret = nct7904_read_reg(data, BANK_0,
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SMI_STS7_REG +
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((channel - 5) >> 3));
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if (ret < 0)
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return ret;
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*val = (ret >> ((channel - 5) & 0x07)) & 1;
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} else {
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ret = nct7904_read_reg(data, BANK_0,
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SMI_STS8_REG +
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((channel - 5) >> 3));
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if (ret < 0)
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return ret;
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*val = (ret >> (((channel - 5) & 0x07) - 4))
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& 1;
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}
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}
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return 0;
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case hwmon_temp_type:
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if (channel < 5) {
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if ((data->tcpu_mask >> channel) & 0x01) {
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if ((data->temp_mode >> channel) & 0x01)
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*val = 3; /* TD */
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else
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*val = 4; /* TR */
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} else {
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*val = 0;
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}
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} else {
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if ((data->has_dts >> (channel - 5)) & 0x01) {
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if (data->enable_dts & ENABLE_TSI)
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*val = 5; /* TSI */
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else
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*val = 6; /* PECI */
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} else {
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*val = 0;
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}
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}
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return 0;
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case hwmon_temp_max:
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reg1 = LTD_HV_LL_REG;
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reg2 = TEMP_CH1_W_REG;
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reg3 = DTS_T_CPU1_W_REG;
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break;
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case hwmon_temp_max_hyst:
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reg1 = LTD_LV_LL_REG;
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reg2 = TEMP_CH1_WH_REG;
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reg3 = DTS_T_CPU1_WH_REG;
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break;
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case hwmon_temp_crit:
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reg1 = LTD_HV_HL_REG;
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reg2 = TEMP_CH1_C_REG;
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reg3 = DTS_T_CPU1_C_REG;
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break;
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case hwmon_temp_crit_hyst:
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reg1 = LTD_LV_HL_REG;
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reg2 = TEMP_CH1_CH_REG;
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reg3 = DTS_T_CPU1_CH_REG;
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break;
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default:
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return -EOPNOTSUPP;
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}
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if (channel == 4)
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ret = nct7904_read_reg(data, BANK_1, reg1);
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else if (channel < 5)
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ret = nct7904_read_reg(data, BANK_1,
|
|
reg2 + channel * 8);
|
|
else
|
|
ret = nct7904_read_reg(data, BANK_1,
|
|
reg3 + (channel - 5) * 4);
|
|
|
|
if (ret < 0)
|
|
return ret;
|
|
*val = ret * 1000;
|
|
return 0;
|
|
}
|
|
|
|
static umode_t nct7904_temp_is_visible(const void *_data, u32 attr, int channel)
|
|
{
|
|
const struct nct7904_data *data = _data;
|
|
|
|
switch (attr) {
|
|
case hwmon_temp_input:
|
|
case hwmon_temp_alarm:
|
|
case hwmon_temp_type:
|
|
if (channel < 5) {
|
|
if (data->tcpu_mask & BIT(channel))
|
|
return 0444;
|
|
} else {
|
|
if (data->has_dts & BIT(channel - 5))
|
|
return 0444;
|
|
}
|
|
break;
|
|
case hwmon_temp_max:
|
|
case hwmon_temp_max_hyst:
|
|
case hwmon_temp_crit:
|
|
case hwmon_temp_crit_hyst:
|
|
if (channel < 5) {
|
|
if (data->tcpu_mask & BIT(channel))
|
|
return 0644;
|
|
} else {
|
|
if (data->has_dts & BIT(channel - 5))
|
|
return 0644;
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int nct7904_read_pwm(struct device *dev, u32 attr, int channel,
|
|
long *val)
|
|
{
|
|
struct nct7904_data *data = dev_get_drvdata(dev);
|
|
int ret;
|
|
|
|
switch (attr) {
|
|
case hwmon_pwm_input:
|
|
ret = nct7904_read_reg(data, BANK_3, FANCTL1_OUT_REG + channel);
|
|
if (ret < 0)
|
|
return ret;
|
|
*val = ret;
|
|
return 0;
|
|
case hwmon_pwm_enable:
|
|
ret = nct7904_read_reg(data, BANK_3, FANCTL1_FMR_REG + channel);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
*val = ret ? 2 : 1;
|
|
return 0;
|
|
default:
|
|
return -EOPNOTSUPP;
|
|
}
|
|
}
|
|
|
|
static int nct7904_write_temp(struct device *dev, u32 attr, int channel,
|
|
long val)
|
|
{
|
|
struct nct7904_data *data = dev_get_drvdata(dev);
|
|
int ret;
|
|
unsigned int reg1, reg2, reg3;
|
|
|
|
val = clamp_val(val / 1000, -128, 127);
|
|
|
|
switch (attr) {
|
|
case hwmon_temp_max:
|
|
reg1 = LTD_HV_LL_REG;
|
|
reg2 = TEMP_CH1_W_REG;
|
|
reg3 = DTS_T_CPU1_W_REG;
|
|
break;
|
|
case hwmon_temp_max_hyst:
|
|
reg1 = LTD_LV_LL_REG;
|
|
reg2 = TEMP_CH1_WH_REG;
|
|
reg3 = DTS_T_CPU1_WH_REG;
|
|
break;
|
|
case hwmon_temp_crit:
|
|
reg1 = LTD_HV_HL_REG;
|
|
reg2 = TEMP_CH1_C_REG;
|
|
reg3 = DTS_T_CPU1_C_REG;
|
|
break;
|
|
case hwmon_temp_crit_hyst:
|
|
reg1 = LTD_LV_HL_REG;
|
|
reg2 = TEMP_CH1_CH_REG;
|
|
reg3 = DTS_T_CPU1_CH_REG;
|
|
break;
|
|
default:
|
|
return -EOPNOTSUPP;
|
|
}
|
|
if (channel == 4)
|
|
ret = nct7904_write_reg(data, BANK_1, reg1, val);
|
|
else if (channel < 5)
|
|
ret = nct7904_write_reg(data, BANK_1,
|
|
reg2 + channel * 8, val);
|
|
else
|
|
ret = nct7904_write_reg(data, BANK_1,
|
|
reg3 + (channel - 5) * 4, val);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int nct7904_write_fan(struct device *dev, u32 attr, int channel,
|
|
long val)
|
|
{
|
|
struct nct7904_data *data = dev_get_drvdata(dev);
|
|
int ret;
|
|
u8 tmp;
|
|
|
|
switch (attr) {
|
|
case hwmon_fan_min:
|
|
if (val <= 0)
|
|
return -EINVAL;
|
|
|
|
val = clamp_val(DIV_ROUND_CLOSEST(1350000, val), 1, 0x1fff);
|
|
tmp = (val >> 5) & 0xff;
|
|
ret = nct7904_write_reg(data, BANK_1,
|
|
FANIN1_HV_HL_REG + channel * 2, tmp);
|
|
if (ret < 0)
|
|
return ret;
|
|
tmp = val & 0x1f;
|
|
ret = nct7904_write_reg(data, BANK_1,
|
|
FANIN1_LV_HL_REG + channel * 2, tmp);
|
|
return ret;
|
|
default:
|
|
return -EOPNOTSUPP;
|
|
}
|
|
}
|
|
|
|
static int nct7904_write_in(struct device *dev, u32 attr, int channel,
|
|
long val)
|
|
{
|
|
struct nct7904_data *data = dev_get_drvdata(dev);
|
|
int ret, index, tmp;
|
|
|
|
index = nct7904_chan_to_index[channel];
|
|
|
|
if (index < 14)
|
|
val = val / 2; /* 0.002V scale */
|
|
else
|
|
val = val / 6; /* 0.006V scale */
|
|
|
|
val = clamp_val(val, 0, 0x7ff);
|
|
|
|
switch (attr) {
|
|
case hwmon_in_min:
|
|
tmp = nct7904_read_reg(data, BANK_1,
|
|
VSEN1_LV_LL_REG + index * 4);
|
|
if (tmp < 0)
|
|
return tmp;
|
|
tmp &= ~0x7;
|
|
tmp |= val & 0x7;
|
|
ret = nct7904_write_reg(data, BANK_1,
|
|
VSEN1_LV_LL_REG + index * 4, tmp);
|
|
if (ret < 0)
|
|
return ret;
|
|
tmp = nct7904_read_reg(data, BANK_1,
|
|
VSEN1_HV_LL_REG + index * 4);
|
|
if (tmp < 0)
|
|
return tmp;
|
|
tmp = (val >> 3) & 0xff;
|
|
ret = nct7904_write_reg(data, BANK_1,
|
|
VSEN1_HV_LL_REG + index * 4, tmp);
|
|
return ret;
|
|
case hwmon_in_max:
|
|
tmp = nct7904_read_reg(data, BANK_1,
|
|
VSEN1_LV_HL_REG + index * 4);
|
|
if (tmp < 0)
|
|
return tmp;
|
|
tmp &= ~0x7;
|
|
tmp |= val & 0x7;
|
|
ret = nct7904_write_reg(data, BANK_1,
|
|
VSEN1_LV_HL_REG + index * 4, tmp);
|
|
if (ret < 0)
|
|
return ret;
|
|
tmp = nct7904_read_reg(data, BANK_1,
|
|
VSEN1_HV_HL_REG + index * 4);
|
|
if (tmp < 0)
|
|
return tmp;
|
|
tmp = (val >> 3) & 0xff;
|
|
ret = nct7904_write_reg(data, BANK_1,
|
|
VSEN1_HV_HL_REG + index * 4, tmp);
|
|
return ret;
|
|
default:
|
|
return -EOPNOTSUPP;
|
|
}
|
|
}
|
|
|
|
static int nct7904_write_pwm(struct device *dev, u32 attr, int channel,
|
|
long val)
|
|
{
|
|
struct nct7904_data *data = dev_get_drvdata(dev);
|
|
int ret;
|
|
|
|
switch (attr) {
|
|
case hwmon_pwm_input:
|
|
if (val < 0 || val > 255)
|
|
return -EINVAL;
|
|
ret = nct7904_write_reg(data, BANK_3, FANCTL1_OUT_REG + channel,
|
|
val);
|
|
return ret;
|
|
case hwmon_pwm_enable:
|
|
if (val < 1 || val > 2 ||
|
|
(val == 2 && !data->fan_mode[channel]))
|
|
return -EINVAL;
|
|
ret = nct7904_write_reg(data, BANK_3, FANCTL1_FMR_REG + channel,
|
|
val == 2 ? data->fan_mode[channel] : 0);
|
|
return ret;
|
|
default:
|
|
return -EOPNOTSUPP;
|
|
}
|
|
}
|
|
|
|
static umode_t nct7904_pwm_is_visible(const void *_data, u32 attr, int channel)
|
|
{
|
|
switch (attr) {
|
|
case hwmon_pwm_input:
|
|
case hwmon_pwm_enable:
|
|
return 0644;
|
|
default:
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
static int nct7904_read(struct device *dev, enum hwmon_sensor_types type,
|
|
u32 attr, int channel, long *val)
|
|
{
|
|
switch (type) {
|
|
case hwmon_in:
|
|
return nct7904_read_in(dev, attr, channel, val);
|
|
case hwmon_fan:
|
|
return nct7904_read_fan(dev, attr, channel, val);
|
|
case hwmon_pwm:
|
|
return nct7904_read_pwm(dev, attr, channel, val);
|
|
case hwmon_temp:
|
|
return nct7904_read_temp(dev, attr, channel, val);
|
|
default:
|
|
return -EOPNOTSUPP;
|
|
}
|
|
}
|
|
|
|
static int nct7904_write(struct device *dev, enum hwmon_sensor_types type,
|
|
u32 attr, int channel, long val)
|
|
{
|
|
switch (type) {
|
|
case hwmon_in:
|
|
return nct7904_write_in(dev, attr, channel, val);
|
|
case hwmon_fan:
|
|
return nct7904_write_fan(dev, attr, channel, val);
|
|
case hwmon_pwm:
|
|
return nct7904_write_pwm(dev, attr, channel, val);
|
|
case hwmon_temp:
|
|
return nct7904_write_temp(dev, attr, channel, val);
|
|
default:
|
|
return -EOPNOTSUPP;
|
|
}
|
|
}
|
|
|
|
static umode_t nct7904_is_visible(const void *data,
|
|
enum hwmon_sensor_types type,
|
|
u32 attr, int channel)
|
|
{
|
|
switch (type) {
|
|
case hwmon_in:
|
|
return nct7904_in_is_visible(data, attr, channel);
|
|
case hwmon_fan:
|
|
return nct7904_fan_is_visible(data, attr, channel);
|
|
case hwmon_pwm:
|
|
return nct7904_pwm_is_visible(data, attr, channel);
|
|
case hwmon_temp:
|
|
return nct7904_temp_is_visible(data, attr, channel);
|
|
default:
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/* Return 0 if detection is successful, -ENODEV otherwise */
|
|
static int nct7904_detect(struct i2c_client *client,
|
|
struct i2c_board_info *info)
|
|
{
|
|
struct i2c_adapter *adapter = client->adapter;
|
|
|
|
if (!i2c_check_functionality(adapter,
|
|
I2C_FUNC_SMBUS_READ_BYTE |
|
|
I2C_FUNC_SMBUS_WRITE_BYTE_DATA))
|
|
return -ENODEV;
|
|
|
|
/* Determine the chip type. */
|
|
if (i2c_smbus_read_byte_data(client, VENDOR_ID_REG) != NUVOTON_ID ||
|
|
i2c_smbus_read_byte_data(client, CHIP_ID_REG) != NCT7904_ID ||
|
|
(i2c_smbus_read_byte_data(client, DEVICE_ID_REG) & 0xf0) != 0x50 ||
|
|
(i2c_smbus_read_byte_data(client, BANK_SEL_REG) & 0xf8) != 0x00)
|
|
return -ENODEV;
|
|
|
|
strlcpy(info->type, "nct7904", I2C_NAME_SIZE);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct hwmon_channel_info *nct7904_info[] = {
|
|
HWMON_CHANNEL_INFO(in,
|
|
/* dummy, skipped in is_visible */
|
|
HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX |
|
|
HWMON_I_ALARM,
|
|
HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX |
|
|
HWMON_I_ALARM,
|
|
HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX |
|
|
HWMON_I_ALARM,
|
|
HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX |
|
|
HWMON_I_ALARM,
|
|
HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX |
|
|
HWMON_I_ALARM,
|
|
HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX |
|
|
HWMON_I_ALARM,
|
|
HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX |
|
|
HWMON_I_ALARM,
|
|
HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX |
|
|
HWMON_I_ALARM,
|
|
HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX |
|
|
HWMON_I_ALARM,
|
|
HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX |
|
|
HWMON_I_ALARM,
|
|
HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX |
|
|
HWMON_I_ALARM,
|
|
HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX |
|
|
HWMON_I_ALARM,
|
|
HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX |
|
|
HWMON_I_ALARM,
|
|
HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX |
|
|
HWMON_I_ALARM,
|
|
HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX |
|
|
HWMON_I_ALARM,
|
|
HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX |
|
|
HWMON_I_ALARM,
|
|
HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX |
|
|
HWMON_I_ALARM,
|
|
HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX |
|
|
HWMON_I_ALARM,
|
|
HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX |
|
|
HWMON_I_ALARM,
|
|
HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX |
|
|
HWMON_I_ALARM,
|
|
HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX |
|
|
HWMON_I_ALARM),
|
|
HWMON_CHANNEL_INFO(fan,
|
|
HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_ALARM,
|
|
HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_ALARM,
|
|
HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_ALARM,
|
|
HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_ALARM,
|
|
HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_ALARM,
|
|
HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_ALARM,
|
|
HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_ALARM,
|
|
HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_ALARM),
|
|
HWMON_CHANNEL_INFO(pwm,
|
|
HWMON_PWM_INPUT | HWMON_PWM_ENABLE,
|
|
HWMON_PWM_INPUT | HWMON_PWM_ENABLE,
|
|
HWMON_PWM_INPUT | HWMON_PWM_ENABLE,
|
|
HWMON_PWM_INPUT | HWMON_PWM_ENABLE),
|
|
HWMON_CHANNEL_INFO(temp,
|
|
HWMON_T_INPUT | HWMON_T_ALARM | HWMON_T_MAX |
|
|
HWMON_T_MAX_HYST | HWMON_T_TYPE | HWMON_T_CRIT |
|
|
HWMON_T_CRIT_HYST,
|
|
HWMON_T_INPUT | HWMON_T_ALARM | HWMON_T_MAX |
|
|
HWMON_T_MAX_HYST | HWMON_T_TYPE | HWMON_T_CRIT |
|
|
HWMON_T_CRIT_HYST,
|
|
HWMON_T_INPUT | HWMON_T_ALARM | HWMON_T_MAX |
|
|
HWMON_T_MAX_HYST | HWMON_T_TYPE | HWMON_T_CRIT |
|
|
HWMON_T_CRIT_HYST,
|
|
HWMON_T_INPUT | HWMON_T_ALARM | HWMON_T_MAX |
|
|
HWMON_T_MAX_HYST | HWMON_T_TYPE | HWMON_T_CRIT |
|
|
HWMON_T_CRIT_HYST,
|
|
HWMON_T_INPUT | HWMON_T_ALARM | HWMON_T_MAX |
|
|
HWMON_T_MAX_HYST | HWMON_T_TYPE | HWMON_T_CRIT |
|
|
HWMON_T_CRIT_HYST,
|
|
HWMON_T_INPUT | HWMON_T_ALARM | HWMON_T_MAX |
|
|
HWMON_T_MAX_HYST | HWMON_T_TYPE | HWMON_T_CRIT |
|
|
HWMON_T_CRIT_HYST,
|
|
HWMON_T_INPUT | HWMON_T_ALARM | HWMON_T_MAX |
|
|
HWMON_T_MAX_HYST | HWMON_T_TYPE | HWMON_T_CRIT |
|
|
HWMON_T_CRIT_HYST,
|
|
HWMON_T_INPUT | HWMON_T_ALARM | HWMON_T_MAX |
|
|
HWMON_T_MAX_HYST | HWMON_T_TYPE | HWMON_T_CRIT |
|
|
HWMON_T_CRIT_HYST,
|
|
HWMON_T_INPUT | HWMON_T_ALARM | HWMON_T_MAX |
|
|
HWMON_T_MAX_HYST | HWMON_T_TYPE | HWMON_T_CRIT |
|
|
HWMON_T_CRIT_HYST),
|
|
NULL
|
|
};
|
|
|
|
static const struct hwmon_ops nct7904_hwmon_ops = {
|
|
.is_visible = nct7904_is_visible,
|
|
.read = nct7904_read,
|
|
.write = nct7904_write,
|
|
};
|
|
|
|
static const struct hwmon_chip_info nct7904_chip_info = {
|
|
.ops = &nct7904_hwmon_ops,
|
|
.info = nct7904_info,
|
|
};
|
|
|
|
static int nct7904_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
struct nct7904_data *data;
|
|
struct device *hwmon_dev;
|
|
struct device *dev = &client->dev;
|
|
int ret, i;
|
|
u32 mask;
|
|
u8 val, bit;
|
|
|
|
data = devm_kzalloc(dev, sizeof(struct nct7904_data), GFP_KERNEL);
|
|
if (!data)
|
|
return -ENOMEM;
|
|
|
|
data->client = client;
|
|
mutex_init(&data->bank_lock);
|
|
data->bank_sel = -1;
|
|
|
|
/* Setup sensor groups. */
|
|
/* FANIN attributes */
|
|
ret = nct7904_read_reg16(data, BANK_0, FANIN_CTRL0_REG);
|
|
if (ret < 0)
|
|
return ret;
|
|
data->fanin_mask = (ret >> 8) | ((ret & 0xff) << 8);
|
|
|
|
/*
|
|
* VSEN attributes
|
|
*
|
|
* Note: voltage sensors overlap with external temperature
|
|
* sensors. So, if we ever decide to support the latter
|
|
* we will have to adjust 'vsen_mask' accordingly.
|
|
*/
|
|
mask = 0;
|
|
ret = nct7904_read_reg16(data, BANK_0, VT_ADC_CTRL0_REG);
|
|
if (ret >= 0)
|
|
mask = (ret >> 8) | ((ret & 0xff) << 8);
|
|
ret = nct7904_read_reg(data, BANK_0, VT_ADC_CTRL2_REG);
|
|
if (ret >= 0)
|
|
mask |= (ret << 16);
|
|
data->vsen_mask = mask;
|
|
|
|
/* CPU_TEMP attributes */
|
|
ret = nct7904_read_reg(data, BANK_0, VT_ADC_CTRL0_REG);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
if ((ret & 0x6) == 0x6)
|
|
data->tcpu_mask |= 1; /* TR1 */
|
|
if ((ret & 0x18) == 0x18)
|
|
data->tcpu_mask |= 2; /* TR2 */
|
|
if ((ret & 0x20) == 0x20)
|
|
data->tcpu_mask |= 4; /* TR3 */
|
|
if ((ret & 0x80) == 0x80)
|
|
data->tcpu_mask |= 8; /* TR4 */
|
|
|
|
/* LTD */
|
|
ret = nct7904_read_reg(data, BANK_0, VT_ADC_CTRL2_REG);
|
|
if (ret < 0)
|
|
return ret;
|
|
if ((ret & 0x02) == 0x02)
|
|
data->tcpu_mask |= 0x10;
|
|
|
|
/* Multi-Function detecting for Volt and TR/TD */
|
|
ret = nct7904_read_reg(data, BANK_0, VT_ADC_MD_REG);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
data->temp_mode = 0;
|
|
for (i = 0; i < 4; i++) {
|
|
val = (ret >> (i * 2)) & 0x03;
|
|
bit = (1 << i);
|
|
if (val == VOLT_MONITOR_MODE) {
|
|
data->tcpu_mask &= ~bit;
|
|
} else if (val == THERMAL_DIODE_MODE && i < 2) {
|
|
data->temp_mode |= bit;
|
|
data->vsen_mask &= ~(0x06 << (i * 2));
|
|
} else if (val == THERMISTOR_MODE) {
|
|
data->vsen_mask &= ~(0x02 << (i * 2));
|
|
} else {
|
|
/* Reserved */
|
|
data->tcpu_mask &= ~bit;
|
|
data->vsen_mask &= ~(0x06 << (i * 2));
|
|
}
|
|
}
|
|
|
|
/* PECI */
|
|
ret = nct7904_read_reg(data, BANK_2, PFE_REG);
|
|
if (ret < 0)
|
|
return ret;
|
|
if (ret & 0x80) {
|
|
data->enable_dts = 1; /* Enable DTS & PECI */
|
|
} else {
|
|
ret = nct7904_read_reg(data, BANK_2, TSI_CTRL_REG);
|
|
if (ret < 0)
|
|
return ret;
|
|
if (ret & 0x80)
|
|
data->enable_dts = 0x3; /* Enable DTS & TSI */
|
|
}
|
|
|
|
/* Check DTS enable status */
|
|
if (data->enable_dts) {
|
|
ret = nct7904_read_reg(data, BANK_0, DTS_T_CTRL0_REG);
|
|
if (ret < 0)
|
|
return ret;
|
|
data->has_dts = ret & 0xF;
|
|
if (data->enable_dts & ENABLE_TSI) {
|
|
ret = nct7904_read_reg(data, BANK_0, DTS_T_CTRL1_REG);
|
|
if (ret < 0)
|
|
return ret;
|
|
data->has_dts |= (ret & 0xF) << 4;
|
|
}
|
|
}
|
|
|
|
for (i = 0; i < FANCTL_MAX; i++) {
|
|
ret = nct7904_read_reg(data, BANK_3, FANCTL1_FMR_REG + i);
|
|
if (ret < 0)
|
|
return ret;
|
|
data->fan_mode[i] = ret;
|
|
}
|
|
|
|
hwmon_dev =
|
|
devm_hwmon_device_register_with_info(dev, client->name, data,
|
|
&nct7904_chip_info, NULL);
|
|
return PTR_ERR_OR_ZERO(hwmon_dev);
|
|
}
|
|
|
|
static const struct i2c_device_id nct7904_id[] = {
|
|
{"nct7904", 0},
|
|
{}
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, nct7904_id);
|
|
|
|
static struct i2c_driver nct7904_driver = {
|
|
.class = I2C_CLASS_HWMON,
|
|
.driver = {
|
|
.name = "nct7904",
|
|
},
|
|
.probe = nct7904_probe,
|
|
.id_table = nct7904_id,
|
|
.detect = nct7904_detect,
|
|
.address_list = normal_i2c,
|
|
};
|
|
|
|
module_i2c_driver(nct7904_driver);
|
|
|
|
MODULE_AUTHOR("Vadim V. Vlasov <vvlasov@dev.rtsoft.ru>");
|
|
MODULE_DESCRIPTION("Hwmon driver for NUVOTON NCT7904");
|
|
MODULE_LICENSE("GPL");
|