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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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365 lines
11 KiB
C
365 lines
11 KiB
C
/*
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* Hardware monitoring driver for Maxim MAX34440/MAX34441
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*
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* Copyright (c) 2011 Ericsson AB.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/err.h>
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#include <linux/i2c.h>
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#include "pmbus.h"
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enum chips { max34440, max34441, max34446 };
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#define MAX34440_MFR_VOUT_PEAK 0xd4
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#define MAX34440_MFR_IOUT_PEAK 0xd5
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#define MAX34440_MFR_TEMPERATURE_PEAK 0xd6
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#define MAX34440_MFR_VOUT_MIN 0xd7
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#define MAX34446_MFR_POUT_PEAK 0xe0
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#define MAX34446_MFR_POUT_AVG 0xe1
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#define MAX34446_MFR_IOUT_AVG 0xe2
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#define MAX34446_MFR_TEMPERATURE_AVG 0xe3
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#define MAX34440_STATUS_OC_WARN (1 << 0)
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#define MAX34440_STATUS_OC_FAULT (1 << 1)
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#define MAX34440_STATUS_OT_FAULT (1 << 5)
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#define MAX34440_STATUS_OT_WARN (1 << 6)
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struct max34440_data {
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int id;
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struct pmbus_driver_info info;
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};
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#define to_max34440_data(x) container_of(x, struct max34440_data, info)
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static int max34440_read_word_data(struct i2c_client *client, int page, int reg)
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{
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int ret;
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const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
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const struct max34440_data *data = to_max34440_data(info);
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switch (reg) {
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case PMBUS_VIRT_READ_VOUT_MIN:
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ret = pmbus_read_word_data(client, page,
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MAX34440_MFR_VOUT_MIN);
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break;
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case PMBUS_VIRT_READ_VOUT_MAX:
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ret = pmbus_read_word_data(client, page,
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MAX34440_MFR_VOUT_PEAK);
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break;
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case PMBUS_VIRT_READ_IOUT_AVG:
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if (data->id != max34446)
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return -ENXIO;
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ret = pmbus_read_word_data(client, page,
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MAX34446_MFR_IOUT_AVG);
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break;
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case PMBUS_VIRT_READ_IOUT_MAX:
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ret = pmbus_read_word_data(client, page,
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MAX34440_MFR_IOUT_PEAK);
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break;
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case PMBUS_VIRT_READ_POUT_AVG:
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if (data->id != max34446)
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return -ENXIO;
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ret = pmbus_read_word_data(client, page,
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MAX34446_MFR_POUT_AVG);
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break;
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case PMBUS_VIRT_READ_POUT_MAX:
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if (data->id != max34446)
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return -ENXIO;
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ret = pmbus_read_word_data(client, page,
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MAX34446_MFR_POUT_PEAK);
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break;
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case PMBUS_VIRT_READ_TEMP_AVG:
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if (data->id != max34446)
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return -ENXIO;
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ret = pmbus_read_word_data(client, page,
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MAX34446_MFR_TEMPERATURE_AVG);
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break;
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case PMBUS_VIRT_READ_TEMP_MAX:
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ret = pmbus_read_word_data(client, page,
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MAX34440_MFR_TEMPERATURE_PEAK);
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break;
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case PMBUS_VIRT_RESET_POUT_HISTORY:
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if (data->id != max34446)
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return -ENXIO;
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ret = 0;
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break;
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case PMBUS_VIRT_RESET_VOUT_HISTORY:
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case PMBUS_VIRT_RESET_IOUT_HISTORY:
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case PMBUS_VIRT_RESET_TEMP_HISTORY:
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ret = 0;
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break;
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default:
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ret = -ENODATA;
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break;
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}
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return ret;
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}
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static int max34440_write_word_data(struct i2c_client *client, int page,
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int reg, u16 word)
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{
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const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
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const struct max34440_data *data = to_max34440_data(info);
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int ret;
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switch (reg) {
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case PMBUS_VIRT_RESET_POUT_HISTORY:
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ret = pmbus_write_word_data(client, page,
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MAX34446_MFR_POUT_PEAK, 0);
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if (ret)
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break;
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ret = pmbus_write_word_data(client, page,
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MAX34446_MFR_POUT_AVG, 0);
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break;
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case PMBUS_VIRT_RESET_VOUT_HISTORY:
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ret = pmbus_write_word_data(client, page,
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MAX34440_MFR_VOUT_MIN, 0x7fff);
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if (ret)
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break;
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ret = pmbus_write_word_data(client, page,
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MAX34440_MFR_VOUT_PEAK, 0);
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break;
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case PMBUS_VIRT_RESET_IOUT_HISTORY:
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ret = pmbus_write_word_data(client, page,
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MAX34440_MFR_IOUT_PEAK, 0);
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if (!ret && data->id == max34446)
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ret = pmbus_write_word_data(client, page,
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MAX34446_MFR_IOUT_AVG, 0);
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break;
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case PMBUS_VIRT_RESET_TEMP_HISTORY:
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ret = pmbus_write_word_data(client, page,
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MAX34440_MFR_TEMPERATURE_PEAK,
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0x8000);
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if (!ret && data->id == max34446)
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ret = pmbus_write_word_data(client, page,
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MAX34446_MFR_TEMPERATURE_AVG, 0);
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break;
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default:
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ret = -ENODATA;
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break;
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}
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return ret;
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}
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static int max34440_read_byte_data(struct i2c_client *client, int page, int reg)
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{
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int ret = 0;
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int mfg_status;
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if (page >= 0) {
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ret = pmbus_set_page(client, page);
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if (ret < 0)
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return ret;
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}
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switch (reg) {
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case PMBUS_STATUS_IOUT:
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mfg_status = pmbus_read_word_data(client, 0,
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PMBUS_STATUS_MFR_SPECIFIC);
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if (mfg_status < 0)
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return mfg_status;
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if (mfg_status & MAX34440_STATUS_OC_WARN)
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ret |= PB_IOUT_OC_WARNING;
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if (mfg_status & MAX34440_STATUS_OC_FAULT)
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ret |= PB_IOUT_OC_FAULT;
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break;
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case PMBUS_STATUS_TEMPERATURE:
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mfg_status = pmbus_read_word_data(client, 0,
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PMBUS_STATUS_MFR_SPECIFIC);
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if (mfg_status < 0)
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return mfg_status;
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if (mfg_status & MAX34440_STATUS_OT_WARN)
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ret |= PB_TEMP_OT_WARNING;
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if (mfg_status & MAX34440_STATUS_OT_FAULT)
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ret |= PB_TEMP_OT_FAULT;
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break;
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default:
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ret = -ENODATA;
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break;
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}
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return ret;
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}
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static struct pmbus_driver_info max34440_info[] = {
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[max34440] = {
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.pages = 14,
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.format[PSC_VOLTAGE_IN] = direct,
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.format[PSC_VOLTAGE_OUT] = direct,
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.format[PSC_TEMPERATURE] = direct,
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.format[PSC_CURRENT_OUT] = direct,
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.m[PSC_VOLTAGE_IN] = 1,
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.b[PSC_VOLTAGE_IN] = 0,
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.R[PSC_VOLTAGE_IN] = 3, /* R = 0 in datasheet reflects mV */
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.m[PSC_VOLTAGE_OUT] = 1,
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.b[PSC_VOLTAGE_OUT] = 0,
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.R[PSC_VOLTAGE_OUT] = 3, /* R = 0 in datasheet reflects mV */
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.m[PSC_CURRENT_OUT] = 1,
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.b[PSC_CURRENT_OUT] = 0,
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.R[PSC_CURRENT_OUT] = 3, /* R = 0 in datasheet reflects mA */
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.m[PSC_TEMPERATURE] = 1,
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.b[PSC_TEMPERATURE] = 0,
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.R[PSC_TEMPERATURE] = 2,
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.func[0] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
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| PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
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.func[1] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
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| PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
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.func[2] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
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| PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
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.func[3] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
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| PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
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.func[4] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
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| PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
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.func[5] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
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| PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
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.func[6] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
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.func[7] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
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.func[8] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
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.func[9] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
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.func[10] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
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.func[11] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
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.func[12] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
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.func[13] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
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.read_byte_data = max34440_read_byte_data,
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.read_word_data = max34440_read_word_data,
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.write_word_data = max34440_write_word_data,
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},
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[max34441] = {
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.pages = 12,
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.format[PSC_VOLTAGE_IN] = direct,
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.format[PSC_VOLTAGE_OUT] = direct,
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.format[PSC_TEMPERATURE] = direct,
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.format[PSC_CURRENT_OUT] = direct,
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.format[PSC_FAN] = direct,
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.m[PSC_VOLTAGE_IN] = 1,
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.b[PSC_VOLTAGE_IN] = 0,
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.R[PSC_VOLTAGE_IN] = 3,
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.m[PSC_VOLTAGE_OUT] = 1,
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.b[PSC_VOLTAGE_OUT] = 0,
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.R[PSC_VOLTAGE_OUT] = 3,
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.m[PSC_CURRENT_OUT] = 1,
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.b[PSC_CURRENT_OUT] = 0,
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.R[PSC_CURRENT_OUT] = 3,
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.m[PSC_TEMPERATURE] = 1,
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.b[PSC_TEMPERATURE] = 0,
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.R[PSC_TEMPERATURE] = 2,
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.m[PSC_FAN] = 1,
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.b[PSC_FAN] = 0,
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.R[PSC_FAN] = 0,
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.func[0] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
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| PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
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.func[1] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
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| PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
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.func[2] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
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| PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
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.func[3] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
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| PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
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.func[4] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
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| PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
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.func[5] = PMBUS_HAVE_FAN12 | PMBUS_HAVE_STATUS_FAN12,
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.func[6] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
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.func[7] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
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.func[8] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
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.func[9] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
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.func[10] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
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.func[11] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
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.read_byte_data = max34440_read_byte_data,
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.read_word_data = max34440_read_word_data,
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.write_word_data = max34440_write_word_data,
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},
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[max34446] = {
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.pages = 7,
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.format[PSC_VOLTAGE_IN] = direct,
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.format[PSC_VOLTAGE_OUT] = direct,
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.format[PSC_TEMPERATURE] = direct,
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.format[PSC_CURRENT_OUT] = direct,
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.format[PSC_POWER] = direct,
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.m[PSC_VOLTAGE_IN] = 1,
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.b[PSC_VOLTAGE_IN] = 0,
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.R[PSC_VOLTAGE_IN] = 3,
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.m[PSC_VOLTAGE_OUT] = 1,
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.b[PSC_VOLTAGE_OUT] = 0,
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.R[PSC_VOLTAGE_OUT] = 3,
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.m[PSC_CURRENT_OUT] = 1,
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.b[PSC_CURRENT_OUT] = 0,
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.R[PSC_CURRENT_OUT] = 3,
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.m[PSC_POWER] = 1,
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.b[PSC_POWER] = 0,
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.R[PSC_POWER] = 3,
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.m[PSC_TEMPERATURE] = 1,
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.b[PSC_TEMPERATURE] = 0,
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.R[PSC_TEMPERATURE] = 2,
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.func[0] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
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| PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT | PMBUS_HAVE_POUT,
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.func[1] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
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| PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
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.func[2] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
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| PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT | PMBUS_HAVE_POUT,
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.func[3] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
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| PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
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.func[4] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
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.func[5] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
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.func[6] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
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.read_byte_data = max34440_read_byte_data,
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.read_word_data = max34440_read_word_data,
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.write_word_data = max34440_write_word_data,
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},
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};
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static int max34440_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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struct max34440_data *data;
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data = devm_kzalloc(&client->dev, sizeof(struct max34440_data),
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GFP_KERNEL);
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if (!data)
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return -ENOMEM;
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data->id = id->driver_data;
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data->info = max34440_info[id->driver_data];
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return pmbus_do_probe(client, id, &data->info);
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}
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static const struct i2c_device_id max34440_id[] = {
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{"max34440", max34440},
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{"max34441", max34441},
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{"max34446", max34446},
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{}
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};
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MODULE_DEVICE_TABLE(i2c, max34440_id);
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/* This is the driver that will be inserted */
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static struct i2c_driver max34440_driver = {
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.driver = {
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.name = "max34440",
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},
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.probe = max34440_probe,
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.remove = pmbus_do_remove,
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.id_table = max34440_id,
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};
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module_i2c_driver(max34440_driver);
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MODULE_AUTHOR("Guenter Roeck");
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MODULE_DESCRIPTION("PMBus driver for Maxim MAX34440/MAX34441");
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MODULE_LICENSE("GPL");
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