467 lines
9.7 KiB
C
467 lines
9.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Ampere Computing SoC's SMPro Hardware Monitoring Driver
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*
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* Copyright (c) 2022, Ampere Computing LLC
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*/
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#include <linux/bitfield.h>
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#include <linux/bitops.h>
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#include <linux/hwmon.h>
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#include <linux/hwmon-sysfs.h>
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#include <linux/kernel.h>
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#include <linux/mod_devicetable.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/property.h>
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#include <linux/regmap.h>
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/* Logical Power Sensor Registers */
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#define SOC_TEMP 0x10
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#define SOC_VRD_TEMP 0x11
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#define DIMM_VRD_TEMP 0x12
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#define CORE_VRD_TEMP 0x13
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#define CH0_DIMM_TEMP 0x14
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#define CH1_DIMM_TEMP 0x15
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#define CH2_DIMM_TEMP 0x16
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#define CH3_DIMM_TEMP 0x17
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#define CH4_DIMM_TEMP 0x18
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#define CH5_DIMM_TEMP 0x19
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#define CH6_DIMM_TEMP 0x1A
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#define CH7_DIMM_TEMP 0x1B
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#define RCA_VRD_TEMP 0x1C
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#define CORE_VRD_PWR 0x20
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#define SOC_PWR 0x21
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#define DIMM_VRD1_PWR 0x22
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#define DIMM_VRD2_PWR 0x23
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#define CORE_VRD_PWR_MW 0x26
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#define SOC_PWR_MW 0x27
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#define DIMM_VRD1_PWR_MW 0x28
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#define DIMM_VRD2_PWR_MW 0x29
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#define RCA_VRD_PWR 0x2A
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#define RCA_VRD_PWR_MW 0x2B
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#define MEM_HOT_THRESHOLD 0x32
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#define SOC_VR_HOT_THRESHOLD 0x33
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#define CORE_VRD_VOLT 0x34
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#define SOC_VRD_VOLT 0x35
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#define DIMM_VRD1_VOLT 0x36
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#define DIMM_VRD2_VOLT 0x37
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#define RCA_VRD_VOLT 0x38
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#define CORE_VRD_CURR 0x39
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#define SOC_VRD_CURR 0x3A
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#define DIMM_VRD1_CURR 0x3B
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#define DIMM_VRD2_CURR 0x3C
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#define RCA_VRD_CURR 0x3D
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struct smpro_hwmon {
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struct regmap *regmap;
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};
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struct smpro_sensor {
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const u8 reg;
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const u8 reg_ext;
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const char *label;
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};
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static const struct smpro_sensor temperature[] = {
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{
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.reg = SOC_TEMP,
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.label = "temp1 SoC"
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},
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{
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.reg = SOC_VRD_TEMP,
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.reg_ext = SOC_VR_HOT_THRESHOLD,
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.label = "temp2 SoC VRD"
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},
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{
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.reg = DIMM_VRD_TEMP,
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.label = "temp3 DIMM VRD"
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},
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{
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.reg = CORE_VRD_TEMP,
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.label = "temp4 CORE VRD"
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},
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{
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.reg = CH0_DIMM_TEMP,
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.reg_ext = MEM_HOT_THRESHOLD,
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.label = "temp5 CH0 DIMM"
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},
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{
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.reg = CH1_DIMM_TEMP,
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.reg_ext = MEM_HOT_THRESHOLD,
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.label = "temp6 CH1 DIMM"
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},
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{
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.reg = CH2_DIMM_TEMP,
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.reg_ext = MEM_HOT_THRESHOLD,
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.label = "temp7 CH2 DIMM"
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},
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{
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.reg = CH3_DIMM_TEMP,
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.reg_ext = MEM_HOT_THRESHOLD,
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.label = "temp8 CH3 DIMM"
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},
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{
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.reg = CH4_DIMM_TEMP,
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.reg_ext = MEM_HOT_THRESHOLD,
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.label = "temp9 CH4 DIMM"
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},
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{
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.reg = CH5_DIMM_TEMP,
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.reg_ext = MEM_HOT_THRESHOLD,
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.label = "temp10 CH5 DIMM"
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},
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{
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.reg = CH6_DIMM_TEMP,
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.reg_ext = MEM_HOT_THRESHOLD,
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.label = "temp11 CH6 DIMM"
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},
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{
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.reg = CH7_DIMM_TEMP,
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.reg_ext = MEM_HOT_THRESHOLD,
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.label = "temp12 CH7 DIMM"
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},
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{
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.reg = RCA_VRD_TEMP,
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.label = "temp13 RCA VRD"
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},
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};
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static const struct smpro_sensor voltage[] = {
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{
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.reg = CORE_VRD_VOLT,
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.label = "vout0 CORE VRD"
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},
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{
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.reg = SOC_VRD_VOLT,
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.label = "vout1 SoC VRD"
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},
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{
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.reg = DIMM_VRD1_VOLT,
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.label = "vout2 DIMM VRD1"
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},
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{
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.reg = DIMM_VRD2_VOLT,
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.label = "vout3 DIMM VRD2"
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},
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{
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.reg = RCA_VRD_VOLT,
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.label = "vout4 RCA VRD"
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},
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};
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static const struct smpro_sensor curr_sensor[] = {
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{
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.reg = CORE_VRD_CURR,
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.label = "iout1 CORE VRD"
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},
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{
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.reg = SOC_VRD_CURR,
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.label = "iout2 SoC VRD"
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},
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{
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.reg = DIMM_VRD1_CURR,
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.label = "iout3 DIMM VRD1"
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},
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{
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.reg = DIMM_VRD2_CURR,
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.label = "iout4 DIMM VRD2"
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},
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{
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.reg = RCA_VRD_CURR,
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.label = "iout5 RCA VRD"
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},
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};
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static const struct smpro_sensor power[] = {
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{
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.reg = CORE_VRD_PWR,
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.reg_ext = CORE_VRD_PWR_MW,
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.label = "power1 CORE VRD"
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},
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{
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.reg = SOC_PWR,
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.reg_ext = SOC_PWR_MW,
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.label = "power2 SoC"
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},
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{
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.reg = DIMM_VRD1_PWR,
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.reg_ext = DIMM_VRD1_PWR_MW,
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.label = "power3 DIMM VRD1"
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},
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{
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.reg = DIMM_VRD2_PWR,
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.reg_ext = DIMM_VRD2_PWR_MW,
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.label = "power4 DIMM VRD2"
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},
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{
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.reg = RCA_VRD_PWR,
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.reg_ext = RCA_VRD_PWR_MW,
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.label = "power5 RCA VRD"
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},
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};
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static int smpro_read_temp(struct device *dev, u32 attr, int channel, long *val)
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{
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struct smpro_hwmon *hwmon = dev_get_drvdata(dev);
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unsigned int value;
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int ret;
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switch (attr) {
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case hwmon_temp_input:
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ret = regmap_read(hwmon->regmap, temperature[channel].reg, &value);
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if (ret)
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return ret;
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break;
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case hwmon_temp_crit:
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ret = regmap_read(hwmon->regmap, temperature[channel].reg_ext, &value);
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if (ret)
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return ret;
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break;
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default:
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return -EOPNOTSUPP;
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}
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*val = sign_extend32(value, 8) * 1000;
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return 0;
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}
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static int smpro_read_in(struct device *dev, u32 attr, int channel, long *val)
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{
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struct smpro_hwmon *hwmon = dev_get_drvdata(dev);
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unsigned int value;
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int ret;
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switch (attr) {
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case hwmon_in_input:
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ret = regmap_read(hwmon->regmap, voltage[channel].reg, &value);
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if (ret < 0)
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return ret;
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/* 15-bit value in 1mV */
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*val = value & 0x7fff;
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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 int smpro_read_curr(struct device *dev, u32 attr, int channel, long *val)
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{
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struct smpro_hwmon *hwmon = dev_get_drvdata(dev);
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unsigned int value;
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int ret;
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switch (attr) {
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case hwmon_curr_input:
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ret = regmap_read(hwmon->regmap, curr_sensor[channel].reg, &value);
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if (ret < 0)
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return ret;
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/* Scale reported by the hardware is 1mA */
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*val = value & 0x7fff;
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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 int smpro_read_power(struct device *dev, u32 attr, int channel, long *val_pwr)
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{
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struct smpro_hwmon *hwmon = dev_get_drvdata(dev);
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unsigned int val = 0, val_mw = 0;
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int ret;
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switch (attr) {
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case hwmon_power_input:
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ret = regmap_read(hwmon->regmap, power[channel].reg, &val);
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if (ret)
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return ret;
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ret = regmap_read(hwmon->regmap, power[channel].reg_ext, &val_mw);
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if (ret)
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return ret;
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/* 10-bit value */
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*val_pwr = (val & 0x3ff) * 1000000 + (val_mw & 0x3ff) * 1000;
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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 int smpro_read(struct device *dev, enum hwmon_sensor_types type,
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u32 attr, int channel, long *val)
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{
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switch (type) {
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case hwmon_temp:
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return smpro_read_temp(dev, attr, channel, val);
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case hwmon_in:
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return smpro_read_in(dev, attr, channel, val);
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case hwmon_power:
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return smpro_read_power(dev, attr, channel, val);
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case hwmon_curr:
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return smpro_read_curr(dev, attr, channel, val);
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default:
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return -EOPNOTSUPP;
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}
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}
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static int smpro_read_string(struct device *dev, enum hwmon_sensor_types type,
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u32 attr, int channel, const char **str)
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{
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switch (type) {
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case hwmon_temp:
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switch (attr) {
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case hwmon_temp_label:
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*str = temperature[channel].label;
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return 0;
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default:
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break;
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}
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break;
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case hwmon_in:
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switch (attr) {
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case hwmon_in_label:
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*str = voltage[channel].label;
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return 0;
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default:
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break;
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}
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break;
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case hwmon_curr:
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switch (attr) {
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case hwmon_curr_label:
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*str = curr_sensor[channel].label;
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return 0;
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default:
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break;
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}
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break;
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case hwmon_power:
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switch (attr) {
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case hwmon_power_label:
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*str = power[channel].label;
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return 0;
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default:
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break;
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}
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break;
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default:
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break;
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}
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return -EOPNOTSUPP;
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}
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static umode_t smpro_is_visible(const void *data, enum hwmon_sensor_types type,
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u32 attr, int channel)
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{
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const struct smpro_hwmon *hwmon = data;
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unsigned int value;
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int ret;
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switch (type) {
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case hwmon_temp:
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switch (attr) {
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case hwmon_temp_input:
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case hwmon_temp_label:
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case hwmon_temp_crit:
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ret = regmap_read(hwmon->regmap, temperature[channel].reg, &value);
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if (ret || value == 0xFFFF)
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return 0;
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break;
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default:
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break;
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}
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break;
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default:
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break;
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}
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return 0444;
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}
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static const struct hwmon_channel_info * const smpro_info[] = {
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HWMON_CHANNEL_INFO(temp,
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HWMON_T_INPUT | HWMON_T_LABEL,
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HWMON_T_INPUT | HWMON_T_LABEL | HWMON_T_CRIT,
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HWMON_T_INPUT | HWMON_T_LABEL,
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HWMON_T_INPUT | HWMON_T_LABEL,
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HWMON_T_INPUT | HWMON_T_LABEL | HWMON_T_CRIT,
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HWMON_T_INPUT | HWMON_T_LABEL | HWMON_T_CRIT,
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HWMON_T_INPUT | HWMON_T_LABEL | HWMON_T_CRIT,
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HWMON_T_INPUT | HWMON_T_LABEL | HWMON_T_CRIT,
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HWMON_T_INPUT | HWMON_T_LABEL | HWMON_T_CRIT,
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HWMON_T_INPUT | HWMON_T_LABEL | HWMON_T_CRIT,
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HWMON_T_INPUT | HWMON_T_LABEL | HWMON_T_CRIT,
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HWMON_T_INPUT | HWMON_T_LABEL | HWMON_T_CRIT,
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HWMON_T_INPUT | HWMON_T_LABEL),
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HWMON_CHANNEL_INFO(in,
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HWMON_I_INPUT | HWMON_I_LABEL,
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HWMON_I_INPUT | HWMON_I_LABEL,
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HWMON_I_INPUT | HWMON_I_LABEL,
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HWMON_I_INPUT | HWMON_I_LABEL,
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HWMON_I_INPUT | HWMON_I_LABEL),
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HWMON_CHANNEL_INFO(power,
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HWMON_P_INPUT | HWMON_P_LABEL,
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HWMON_P_INPUT | HWMON_P_LABEL,
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HWMON_P_INPUT | HWMON_P_LABEL,
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HWMON_P_INPUT | HWMON_P_LABEL,
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HWMON_P_INPUT | HWMON_P_LABEL),
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HWMON_CHANNEL_INFO(curr,
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HWMON_C_INPUT | HWMON_C_LABEL,
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HWMON_C_INPUT | HWMON_C_LABEL,
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HWMON_C_INPUT | HWMON_C_LABEL,
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HWMON_C_INPUT | HWMON_C_LABEL,
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HWMON_C_INPUT | HWMON_C_LABEL),
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NULL
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};
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static const struct hwmon_ops smpro_hwmon_ops = {
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.is_visible = smpro_is_visible,
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.read = smpro_read,
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.read_string = smpro_read_string,
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};
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static const struct hwmon_chip_info smpro_chip_info = {
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.ops = &smpro_hwmon_ops,
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.info = smpro_info,
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};
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static int smpro_hwmon_probe(struct platform_device *pdev)
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{
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struct smpro_hwmon *hwmon;
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struct device *hwmon_dev;
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hwmon = devm_kzalloc(&pdev->dev, sizeof(struct smpro_hwmon), GFP_KERNEL);
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if (!hwmon)
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return -ENOMEM;
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hwmon->regmap = dev_get_regmap(pdev->dev.parent, NULL);
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if (!hwmon->regmap)
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return -ENODEV;
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hwmon_dev = devm_hwmon_device_register_with_info(&pdev->dev, "smpro_hwmon",
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hwmon, &smpro_chip_info, NULL);
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return PTR_ERR_OR_ZERO(hwmon_dev);
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}
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static struct platform_driver smpro_hwmon_driver = {
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.probe = smpro_hwmon_probe,
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.driver = {
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.name = "smpro-hwmon",
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},
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};
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module_platform_driver(smpro_hwmon_driver);
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MODULE_AUTHOR("Thu Nguyen <thu@os.amperecomputing.com>");
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MODULE_AUTHOR("Quan Nguyen <quan@os.amperecomputing.com>");
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MODULE_DESCRIPTION("Ampere Altra SMPro hwmon driver");
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MODULE_LICENSE("GPL");
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