| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * Intel MAX 10 BMC HWMON Driver |
| * |
| * Copyright (C) 2018-2020 Intel Corporation. All rights reserved. |
| * |
| */ |
| #include <linux/device.h> |
| #include <linux/hwmon.h> |
| #include <linux/mfd/intel-m10-bmc.h> |
| #include <linux/module.h> |
| #include <linux/mod_devicetable.h> |
| #include <linux/platform_device.h> |
| |
| struct m10bmc_sdata { |
| unsigned int reg_input; |
| unsigned int reg_max; |
| unsigned int reg_crit; |
| unsigned int reg_hyst; |
| unsigned int reg_min; |
| unsigned int multiplier; |
| const char *label; |
| }; |
| |
| struct m10bmc_hwmon_board_data { |
| const struct m10bmc_sdata *tables[hwmon_max]; |
| const struct hwmon_channel_info **hinfo; |
| }; |
| |
| struct m10bmc_hwmon { |
| struct device *dev; |
| struct hwmon_chip_info chip; |
| char *hw_name; |
| struct intel_m10bmc *m10bmc; |
| const struct m10bmc_hwmon_board_data *bdata; |
| }; |
| |
| static const struct m10bmc_sdata n3000bmc_temp_tbl[] = { |
| { 0x100, 0x104, 0x108, 0x10c, 0x0, 500, "Board Temperature" }, |
| { 0x110, 0x114, 0x118, 0x0, 0x0, 500, "FPGA Die Temperature" }, |
| { 0x11c, 0x124, 0x120, 0x0, 0x0, 500, "QSFP0 Temperature" }, |
| { 0x12c, 0x134, 0x130, 0x0, 0x0, 500, "QSFP1 Temperature" }, |
| { 0x168, 0x0, 0x0, 0x0, 0x0, 500, "Retimer A Temperature" }, |
| { 0x16c, 0x0, 0x0, 0x0, 0x0, 500, "Retimer A SerDes Temperature" }, |
| { 0x170, 0x0, 0x0, 0x0, 0x0, 500, "Retimer B Temperature" }, |
| { 0x174, 0x0, 0x0, 0x0, 0x0, 500, "Retimer B SerDes Temperature" }, |
| }; |
| |
| static const struct m10bmc_sdata n3000bmc_in_tbl[] = { |
| { 0x128, 0x0, 0x0, 0x0, 0x0, 1, "QSFP0 Supply Voltage" }, |
| { 0x138, 0x0, 0x0, 0x0, 0x0, 1, "QSFP1 Supply Voltage" }, |
| { 0x13c, 0x0, 0x0, 0x0, 0x0, 1, "FPGA Core Voltage" }, |
| { 0x144, 0x0, 0x0, 0x0, 0x0, 1, "12V Backplane Voltage" }, |
| { 0x14c, 0x0, 0x0, 0x0, 0x0, 1, "1.2V Voltage" }, |
| { 0x150, 0x0, 0x0, 0x0, 0x0, 1, "12V AUX Voltage" }, |
| { 0x158, 0x0, 0x0, 0x0, 0x0, 1, "1.8V Voltage" }, |
| { 0x15c, 0x0, 0x0, 0x0, 0x0, 1, "3.3V Voltage" }, |
| }; |
| |
| static const struct m10bmc_sdata n3000bmc_curr_tbl[] = { |
| { 0x140, 0x0, 0x0, 0x0, 0x0, 1, "FPGA Core Current" }, |
| { 0x148, 0x0, 0x0, 0x0, 0x0, 1, "12V Backplane Current" }, |
| { 0x154, 0x0, 0x0, 0x0, 0x0, 1, "12V AUX Current" }, |
| }; |
| |
| static const struct m10bmc_sdata n3000bmc_power_tbl[] = { |
| { 0x160, 0x0, 0x0, 0x0, 0x0, 1000, "Board Power" }, |
| }; |
| |
| static const struct hwmon_channel_info *n3000bmc_hinfo[] = { |
| HWMON_CHANNEL_INFO(temp, |
| HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_MAX_HYST | |
| HWMON_T_CRIT | HWMON_T_CRIT_HYST | HWMON_T_LABEL, |
| HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | |
| HWMON_T_LABEL, |
| HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | |
| HWMON_T_LABEL, |
| HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | |
| HWMON_T_LABEL, |
| HWMON_T_INPUT | HWMON_T_LABEL, |
| HWMON_T_INPUT | HWMON_T_LABEL, |
| HWMON_T_INPUT | HWMON_T_LABEL, |
| HWMON_T_INPUT | HWMON_T_LABEL), |
| HWMON_CHANNEL_INFO(in, |
| HWMON_I_INPUT | HWMON_I_LABEL, |
| HWMON_I_INPUT | HWMON_I_LABEL, |
| HWMON_I_INPUT | HWMON_I_LABEL, |
| HWMON_I_INPUT | HWMON_I_LABEL, |
| HWMON_I_INPUT | HWMON_I_LABEL, |
| HWMON_I_INPUT | HWMON_I_LABEL, |
| HWMON_I_INPUT | HWMON_I_LABEL, |
| HWMON_I_INPUT | HWMON_I_LABEL), |
| HWMON_CHANNEL_INFO(curr, |
| HWMON_C_INPUT | HWMON_C_LABEL, |
| HWMON_C_INPUT | HWMON_C_LABEL, |
| HWMON_C_INPUT | HWMON_C_LABEL), |
| HWMON_CHANNEL_INFO(power, |
| HWMON_P_INPUT | HWMON_P_LABEL), |
| NULL |
| }; |
| |
| static const struct m10bmc_sdata d5005bmc_temp_tbl[] = { |
| { 0x100, 0x104, 0x108, 0x10c, 0x0, 500, "Board Inlet Air Temperature" }, |
| { 0x110, 0x114, 0x118, 0x0, 0x0, 500, "FPGA Core Temperature" }, |
| { 0x11c, 0x120, 0x124, 0x128, 0x0, 500, "Board Exhaust Air Temperature" }, |
| { 0x12c, 0x130, 0x134, 0x0, 0x0, 500, "FPGA Transceiver Temperature" }, |
| { 0x138, 0x13c, 0x140, 0x144, 0x0, 500, "RDIMM0 Temperature" }, |
| { 0x148, 0x14c, 0x150, 0x154, 0x0, 500, "RDIMM1 Temperature" }, |
| { 0x158, 0x15c, 0x160, 0x164, 0x0, 500, "RDIMM2 Temperature" }, |
| { 0x168, 0x16c, 0x170, 0x174, 0x0, 500, "RDIMM3 Temperature" }, |
| { 0x178, 0x17c, 0x180, 0x0, 0x0, 500, "QSFP0 Temperature" }, |
| { 0x188, 0x18c, 0x190, 0x0, 0x0, 500, "QSFP1 Temperature" }, |
| { 0x1a0, 0x1a4, 0x1a8, 0x0, 0x0, 500, "3.3v Temperature" }, |
| { 0x1bc, 0x1c0, 0x1c4, 0x0, 0x0, 500, "VCCERAM Temperature" }, |
| { 0x1d8, 0x1dc, 0x1e0, 0x0, 0x0, 500, "VCCR Temperature" }, |
| { 0x1f4, 0x1f8, 0x1fc, 0x0, 0x0, 500, "VCCT Temperature" }, |
| { 0x210, 0x214, 0x218, 0x0, 0x0, 500, "1.8v Temperature" }, |
| { 0x22c, 0x230, 0x234, 0x0, 0x0, 500, "12v Backplane Temperature" }, |
| { 0x248, 0x24c, 0x250, 0x0, 0x0, 500, "12v AUX Temperature" }, |
| }; |
| |
| static const struct m10bmc_sdata d5005bmc_in_tbl[] = { |
| { 0x184, 0x0, 0x0, 0x0, 0x0, 1, "QSFP0 Supply Voltage" }, |
| { 0x194, 0x0, 0x0, 0x0, 0x0, 1, "QSFP1 Supply Voltage" }, |
| { 0x198, 0x0, 0x0, 0x0, 0x0, 1, "FPGA Core Voltage" }, |
| { 0x1ac, 0x1b0, 0x1b4, 0x0, 0x0, 1, "3.3v Voltage" }, |
| { 0x1c8, 0x1cc, 0x1d0, 0x0, 0x0, 1, "VCCERAM Voltage" }, |
| { 0x1e4, 0x1e8, 0x1ec, 0x0, 0x0, 1, "VCCR Voltage" }, |
| { 0x200, 0x204, 0x208, 0x0, 0x0, 1, "VCCT Voltage" }, |
| { 0x21c, 0x220, 0x224, 0x0, 0x0, 1, "1.8v Voltage" }, |
| { 0x238, 0x0, 0x0, 0x0, 0x23c, 1, "12v Backplane Voltage" }, |
| { 0x254, 0x0, 0x0, 0x0, 0x258, 1, "12v AUX Voltage" }, |
| }; |
| |
| static const struct m10bmc_sdata d5005bmc_curr_tbl[] = { |
| { 0x19c, 0x0, 0x0, 0x0, 0x0, 1, "FPGA Core Current" }, |
| { 0x1b8, 0x0, 0x0, 0x0, 0x0, 1, "3.3v Current" }, |
| { 0x1d4, 0x0, 0x0, 0x0, 0x0, 1, "VCCERAM Current" }, |
| { 0x1f0, 0x0, 0x0, 0x0, 0x0, 1, "VCCR Current" }, |
| { 0x20c, 0x0, 0x0, 0x0, 0x0, 1, "VCCT Current" }, |
| { 0x228, 0x0, 0x0, 0x0, 0x0, 1, "1.8v Current" }, |
| { 0x240, 0x244, 0x0, 0x0, 0x0, 1, "12v Backplane Current" }, |
| { 0x25c, 0x260, 0x0, 0x0, 0x0, 1, "12v AUX Current" }, |
| }; |
| |
| static const struct m10bmc_hwmon_board_data n3000bmc_hwmon_bdata = { |
| .tables = { |
| [hwmon_temp] = n3000bmc_temp_tbl, |
| [hwmon_in] = n3000bmc_in_tbl, |
| [hwmon_curr] = n3000bmc_curr_tbl, |
| [hwmon_power] = n3000bmc_power_tbl, |
| }, |
| |
| .hinfo = n3000bmc_hinfo, |
| }; |
| |
| static const struct hwmon_channel_info *d5005bmc_hinfo[] = { |
| HWMON_CHANNEL_INFO(temp, |
| HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_MAX_HYST | |
| HWMON_T_CRIT | HWMON_T_CRIT_HYST | HWMON_T_LABEL, |
| HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | |
| HWMON_T_LABEL, |
| HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_MAX_HYST | |
| HWMON_T_CRIT | HWMON_T_CRIT_HYST | HWMON_T_LABEL, |
| HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | |
| HWMON_T_LABEL, |
| HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_MAX_HYST | |
| HWMON_T_CRIT | HWMON_T_CRIT_HYST | HWMON_T_LABEL, |
| HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_MAX_HYST | |
| HWMON_T_CRIT | HWMON_T_CRIT_HYST | HWMON_T_LABEL, |
| HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_MAX_HYST | |
| HWMON_T_CRIT | HWMON_T_CRIT_HYST | HWMON_T_LABEL, |
| HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_MAX_HYST | |
| HWMON_T_CRIT | HWMON_T_CRIT_HYST | HWMON_T_LABEL, |
| HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | |
| HWMON_T_LABEL, |
| HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | |
| HWMON_T_LABEL, |
| HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | |
| HWMON_T_LABEL, |
| HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | |
| HWMON_T_LABEL, |
| HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | |
| HWMON_T_LABEL, |
| HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | |
| HWMON_T_LABEL, |
| HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | |
| HWMON_T_LABEL, |
| HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | |
| HWMON_T_LABEL, |
| HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | |
| HWMON_T_LABEL), |
| HWMON_CHANNEL_INFO(in, |
| HWMON_I_INPUT | HWMON_I_LABEL, |
| HWMON_I_INPUT | HWMON_I_LABEL, |
| HWMON_I_INPUT | HWMON_I_LABEL, |
| HWMON_I_INPUT | HWMON_I_MAX | HWMON_I_CRIT | |
| HWMON_I_LABEL, |
| HWMON_I_INPUT | HWMON_I_MAX | HWMON_I_CRIT | |
| HWMON_I_LABEL, |
| HWMON_I_INPUT | HWMON_I_MAX | HWMON_I_CRIT | |
| HWMON_I_LABEL, |
| HWMON_I_INPUT | HWMON_I_MAX | HWMON_I_CRIT | |
| HWMON_I_LABEL, |
| HWMON_I_INPUT | HWMON_I_MAX | HWMON_I_CRIT | |
| HWMON_I_LABEL, |
| HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_LABEL, |
| HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_LABEL), |
| HWMON_CHANNEL_INFO(curr, |
| HWMON_C_INPUT | HWMON_C_LABEL, |
| HWMON_C_INPUT | HWMON_C_LABEL, |
| HWMON_C_INPUT | HWMON_C_LABEL, |
| HWMON_C_INPUT | HWMON_C_LABEL, |
| HWMON_C_INPUT | HWMON_C_LABEL, |
| HWMON_C_INPUT | HWMON_C_LABEL, |
| HWMON_C_INPUT | HWMON_C_MAX | HWMON_C_LABEL, |
| HWMON_C_INPUT | HWMON_C_MAX | HWMON_C_LABEL), |
| NULL |
| }; |
| |
| static const struct m10bmc_hwmon_board_data d5005bmc_hwmon_bdata = { |
| .tables = { |
| [hwmon_temp] = d5005bmc_temp_tbl, |
| [hwmon_in] = d5005bmc_in_tbl, |
| [hwmon_curr] = d5005bmc_curr_tbl, |
| }, |
| |
| .hinfo = d5005bmc_hinfo, |
| }; |
| |
| static umode_t |
| m10bmc_hwmon_is_visible(const void *data, enum hwmon_sensor_types type, |
| u32 attr, int channel) |
| { |
| return 0444; |
| } |
| |
| static const struct m10bmc_sdata * |
| find_sensor_data(struct m10bmc_hwmon *hw, enum hwmon_sensor_types type, |
| int channel) |
| { |
| const struct m10bmc_sdata *tbl; |
| |
| tbl = hw->bdata->tables[type]; |
| if (!tbl) |
| return ERR_PTR(-EOPNOTSUPP); |
| |
| return &tbl[channel]; |
| } |
| |
| static int do_sensor_read(struct m10bmc_hwmon *hw, |
| const struct m10bmc_sdata *data, |
| unsigned int regoff, long *val) |
| { |
| unsigned int regval; |
| int ret; |
| |
| ret = m10bmc_sys_read(hw->m10bmc, regoff, ®val); |
| if (ret) |
| return ret; |
| |
| /* |
| * BMC Firmware will return 0xdeadbeef if the sensor value is invalid |
| * at that time. This usually happens on sensor channels which connect |
| * to external pluggable modules, e.g. QSFP temperature and voltage. |
| * When the QSFP is unplugged from cage, driver will get 0xdeadbeef |
| * from their registers. |
| */ |
| if (regval == 0xdeadbeef) |
| return -ENODATA; |
| |
| *val = regval * data->multiplier; |
| |
| return 0; |
| } |
| |
| static int m10bmc_hwmon_read(struct device *dev, enum hwmon_sensor_types type, |
| u32 attr, int channel, long *val) |
| { |
| struct m10bmc_hwmon *hw = dev_get_drvdata(dev); |
| unsigned int reg = 0, reg_hyst = 0; |
| const struct m10bmc_sdata *data; |
| long hyst, value; |
| int ret; |
| |
| data = find_sensor_data(hw, type, channel); |
| if (IS_ERR(data)) |
| return PTR_ERR(data); |
| |
| switch (type) { |
| case hwmon_temp: |
| switch (attr) { |
| case hwmon_temp_input: |
| reg = data->reg_input; |
| break; |
| case hwmon_temp_max_hyst: |
| reg_hyst = data->reg_hyst; |
| fallthrough; |
| case hwmon_temp_max: |
| reg = data->reg_max; |
| break; |
| case hwmon_temp_crit_hyst: |
| reg_hyst = data->reg_hyst; |
| fallthrough; |
| case hwmon_temp_crit: |
| reg = data->reg_crit; |
| break; |
| default: |
| return -EOPNOTSUPP; |
| } |
| break; |
| case hwmon_in: |
| switch (attr) { |
| case hwmon_in_input: |
| reg = data->reg_input; |
| break; |
| case hwmon_in_max: |
| reg = data->reg_max; |
| break; |
| case hwmon_in_crit: |
| reg = data->reg_crit; |
| break; |
| case hwmon_in_min: |
| reg = data->reg_min; |
| break; |
| default: |
| return -EOPNOTSUPP; |
| } |
| break; |
| case hwmon_curr: |
| switch (attr) { |
| case hwmon_curr_input: |
| reg = data->reg_input; |
| break; |
| case hwmon_curr_max: |
| reg = data->reg_max; |
| break; |
| case hwmon_curr_crit: |
| reg = data->reg_crit; |
| break; |
| default: |
| return -EOPNOTSUPP; |
| } |
| break; |
| case hwmon_power: |
| switch (attr) { |
| case hwmon_power_input: |
| reg = data->reg_input; |
| break; |
| default: |
| return -EOPNOTSUPP; |
| } |
| break; |
| default: |
| return -EOPNOTSUPP; |
| } |
| |
| if (!reg) |
| return -EOPNOTSUPP; |
| |
| ret = do_sensor_read(hw, data, reg, &value); |
| if (ret) |
| return ret; |
| |
| if (reg_hyst) { |
| ret = do_sensor_read(hw, data, reg_hyst, &hyst); |
| if (ret) |
| return ret; |
| |
| value -= hyst; |
| } |
| |
| *val = value; |
| |
| return 0; |
| } |
| |
| static int m10bmc_hwmon_read_string(struct device *dev, |
| enum hwmon_sensor_types type, |
| u32 attr, int channel, const char **str) |
| { |
| struct m10bmc_hwmon *hw = dev_get_drvdata(dev); |
| const struct m10bmc_sdata *data; |
| |
| data = find_sensor_data(hw, type, channel); |
| if (IS_ERR(data)) |
| return PTR_ERR(data); |
| |
| *str = data->label; |
| |
| return 0; |
| } |
| |
| static const struct hwmon_ops m10bmc_hwmon_ops = { |
| .is_visible = m10bmc_hwmon_is_visible, |
| .read = m10bmc_hwmon_read, |
| .read_string = m10bmc_hwmon_read_string, |
| }; |
| |
| static int m10bmc_hwmon_probe(struct platform_device *pdev) |
| { |
| const struct platform_device_id *id = platform_get_device_id(pdev); |
| struct intel_m10bmc *m10bmc = dev_get_drvdata(pdev->dev.parent); |
| struct device *hwmon_dev, *dev = &pdev->dev; |
| struct m10bmc_hwmon *hw; |
| int i; |
| |
| hw = devm_kzalloc(dev, sizeof(*hw), GFP_KERNEL); |
| if (!hw) |
| return -ENOMEM; |
| |
| hw->dev = dev; |
| hw->m10bmc = m10bmc; |
| hw->bdata = (const struct m10bmc_hwmon_board_data *)id->driver_data; |
| |
| hw->chip.info = hw->bdata->hinfo; |
| hw->chip.ops = &m10bmc_hwmon_ops; |
| |
| hw->hw_name = devm_kstrdup(dev, id->name, GFP_KERNEL); |
| if (!hw->hw_name) |
| return -ENOMEM; |
| |
| for (i = 0; hw->hw_name[i]; i++) |
| if (hwmon_is_bad_char(hw->hw_name[i])) |
| hw->hw_name[i] = '_'; |
| |
| hwmon_dev = devm_hwmon_device_register_with_info(dev, hw->hw_name, |
| hw, &hw->chip, NULL); |
| return PTR_ERR_OR_ZERO(hwmon_dev); |
| } |
| |
| static const struct platform_device_id intel_m10bmc_hwmon_ids[] = { |
| { |
| .name = "n3000bmc-hwmon", |
| .driver_data = (unsigned long)&n3000bmc_hwmon_bdata, |
| }, |
| { |
| .name = "d5005bmc-hwmon", |
| .driver_data = (unsigned long)&d5005bmc_hwmon_bdata, |
| }, |
| { } |
| }; |
| |
| static struct platform_driver intel_m10bmc_hwmon_driver = { |
| .probe = m10bmc_hwmon_probe, |
| .driver = { |
| .name = "intel-m10-bmc-hwmon", |
| }, |
| .id_table = intel_m10bmc_hwmon_ids, |
| }; |
| module_platform_driver(intel_m10bmc_hwmon_driver); |
| |
| MODULE_DEVICE_TABLE(platform, intel_m10bmc_hwmon_ids); |
| MODULE_AUTHOR("Intel Corporation"); |
| MODULE_DESCRIPTION("Intel MAX 10 BMC hardware monitor"); |
| MODULE_LICENSE("GPL"); |
