535 lines
16 KiB
C
535 lines
16 KiB
C
/***************************************************************************
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* Copyright (C) 2011-2012 Hans de Goede <hdegoede@redhat.com> *
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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 *
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* Free Software Foundation, Inc., *
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* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
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***************************************************************************/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/jiffies.h>
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#include <linux/platform_device.h>
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#include <linux/hwmon.h>
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#include <linux/hwmon-sysfs.h>
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#include <linux/err.h>
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#include <linux/mutex.h>
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#include "sch56xx-common.h"
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#define DRVNAME "sch5636"
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#define DEVNAME "theseus" /* We only support one model for now */
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#define SCH5636_REG_FUJITSU_ID 0x780
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#define SCH5636_REG_FUJITSU_REV 0x783
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#define SCH5636_NO_INS 5
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#define SCH5636_NO_TEMPS 16
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#define SCH5636_NO_FANS 8
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static const u16 SCH5636_REG_IN_VAL[SCH5636_NO_INS] = {
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0x22, 0x23, 0x24, 0x25, 0x189 };
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static const u16 SCH5636_REG_IN_FACTORS[SCH5636_NO_INS] = {
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4400, 1500, 4000, 4400, 16000 };
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static const char * const SCH5636_IN_LABELS[SCH5636_NO_INS] = {
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"3.3V", "VREF", "VBAT", "3.3AUX", "12V" };
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static const u16 SCH5636_REG_TEMP_VAL[SCH5636_NO_TEMPS] = {
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0x2B, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x180, 0x181,
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0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x8B, 0x8C };
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#define SCH5636_REG_TEMP_CTRL(i) (0x790 + (i))
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#define SCH5636_TEMP_WORKING 0x01
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#define SCH5636_TEMP_ALARM 0x02
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#define SCH5636_TEMP_DEACTIVATED 0x80
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static const u16 SCH5636_REG_FAN_VAL[SCH5636_NO_FANS] = {
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0x2C, 0x2E, 0x30, 0x32, 0x62, 0x64, 0x66, 0x68 };
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#define SCH5636_REG_FAN_CTRL(i) (0x880 + (i))
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/* FAULT in datasheet, but acts as an alarm */
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#define SCH5636_FAN_ALARM 0x04
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#define SCH5636_FAN_NOT_PRESENT 0x08
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#define SCH5636_FAN_DEACTIVATED 0x80
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struct sch5636_data {
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unsigned short addr;
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struct device *hwmon_dev;
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struct sch56xx_watchdog_data *watchdog;
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struct mutex update_lock;
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char valid; /* !=0 if following fields are valid */
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unsigned long last_updated; /* In jiffies */
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u8 in[SCH5636_NO_INS];
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u8 temp_val[SCH5636_NO_TEMPS];
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u8 temp_ctrl[SCH5636_NO_TEMPS];
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u16 fan_val[SCH5636_NO_FANS];
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u8 fan_ctrl[SCH5636_NO_FANS];
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};
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static struct sch5636_data *sch5636_update_device(struct device *dev)
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{
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struct sch5636_data *data = dev_get_drvdata(dev);
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struct sch5636_data *ret = data;
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int i, val;
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mutex_lock(&data->update_lock);
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/* Cache the values for 1 second */
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if (data->valid && !time_after(jiffies, data->last_updated + HZ))
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goto abort;
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for (i = 0; i < SCH5636_NO_INS; i++) {
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val = sch56xx_read_virtual_reg(data->addr,
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SCH5636_REG_IN_VAL[i]);
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if (unlikely(val < 0)) {
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ret = ERR_PTR(val);
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goto abort;
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}
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data->in[i] = val;
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}
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for (i = 0; i < SCH5636_NO_TEMPS; i++) {
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if (data->temp_ctrl[i] & SCH5636_TEMP_DEACTIVATED)
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continue;
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val = sch56xx_read_virtual_reg(data->addr,
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SCH5636_REG_TEMP_VAL[i]);
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if (unlikely(val < 0)) {
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ret = ERR_PTR(val);
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goto abort;
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}
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data->temp_val[i] = val;
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val = sch56xx_read_virtual_reg(data->addr,
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SCH5636_REG_TEMP_CTRL(i));
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if (unlikely(val < 0)) {
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ret = ERR_PTR(val);
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goto abort;
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}
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data->temp_ctrl[i] = val;
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/* Alarms need to be explicitly write-cleared */
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if (val & SCH5636_TEMP_ALARM) {
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sch56xx_write_virtual_reg(data->addr,
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SCH5636_REG_TEMP_CTRL(i), val);
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}
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}
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for (i = 0; i < SCH5636_NO_FANS; i++) {
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if (data->fan_ctrl[i] & SCH5636_FAN_DEACTIVATED)
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continue;
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val = sch56xx_read_virtual_reg16(data->addr,
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SCH5636_REG_FAN_VAL[i]);
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if (unlikely(val < 0)) {
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ret = ERR_PTR(val);
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goto abort;
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}
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data->fan_val[i] = val;
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val = sch56xx_read_virtual_reg(data->addr,
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SCH5636_REG_FAN_CTRL(i));
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if (unlikely(val < 0)) {
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ret = ERR_PTR(val);
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goto abort;
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}
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data->fan_ctrl[i] = val;
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/* Alarms need to be explicitly write-cleared */
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if (val & SCH5636_FAN_ALARM) {
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sch56xx_write_virtual_reg(data->addr,
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SCH5636_REG_FAN_CTRL(i), val);
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}
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}
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data->last_updated = jiffies;
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data->valid = 1;
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abort:
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mutex_unlock(&data->update_lock);
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return ret;
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}
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static int reg_to_rpm(u16 reg)
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{
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if (reg == 0)
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return -EIO;
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if (reg == 0xffff)
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return 0;
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return 5400540 / reg;
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}
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static ssize_t name_show(struct device *dev, struct device_attribute *devattr,
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char *buf)
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{
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return snprintf(buf, PAGE_SIZE, "%s\n", DEVNAME);
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}
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static ssize_t in_value_show(struct device *dev,
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struct device_attribute *devattr, char *buf)
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{
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
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struct sch5636_data *data = sch5636_update_device(dev);
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int val;
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if (IS_ERR(data))
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return PTR_ERR(data);
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val = DIV_ROUND_CLOSEST(
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data->in[attr->index] * SCH5636_REG_IN_FACTORS[attr->index],
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255);
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return snprintf(buf, PAGE_SIZE, "%d\n", val);
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}
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static ssize_t in_label_show(struct device *dev,
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struct device_attribute *devattr, char *buf)
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{
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
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return snprintf(buf, PAGE_SIZE, "%s\n",
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SCH5636_IN_LABELS[attr->index]);
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}
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static ssize_t temp_value_show(struct device *dev,
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struct device_attribute *devattr, char *buf)
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{
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
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struct sch5636_data *data = sch5636_update_device(dev);
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int val;
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if (IS_ERR(data))
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return PTR_ERR(data);
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val = (data->temp_val[attr->index] - 64) * 1000;
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return snprintf(buf, PAGE_SIZE, "%d\n", val);
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}
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static ssize_t temp_fault_show(struct device *dev,
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struct device_attribute *devattr, char *buf)
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{
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
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struct sch5636_data *data = sch5636_update_device(dev);
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int val;
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if (IS_ERR(data))
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return PTR_ERR(data);
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val = (data->temp_ctrl[attr->index] & SCH5636_TEMP_WORKING) ? 0 : 1;
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return snprintf(buf, PAGE_SIZE, "%d\n", val);
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}
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static ssize_t temp_alarm_show(struct device *dev,
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struct device_attribute *devattr, char *buf)
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{
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
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struct sch5636_data *data = sch5636_update_device(dev);
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int val;
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if (IS_ERR(data))
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return PTR_ERR(data);
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val = (data->temp_ctrl[attr->index] & SCH5636_TEMP_ALARM) ? 1 : 0;
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return snprintf(buf, PAGE_SIZE, "%d\n", val);
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}
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static ssize_t fan_value_show(struct device *dev,
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struct device_attribute *devattr, char *buf)
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{
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
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struct sch5636_data *data = sch5636_update_device(dev);
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int val;
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if (IS_ERR(data))
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return PTR_ERR(data);
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val = reg_to_rpm(data->fan_val[attr->index]);
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if (val < 0)
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return val;
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return snprintf(buf, PAGE_SIZE, "%d\n", val);
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}
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static ssize_t fan_fault_show(struct device *dev,
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struct device_attribute *devattr, char *buf)
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{
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
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struct sch5636_data *data = sch5636_update_device(dev);
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int val;
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if (IS_ERR(data))
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return PTR_ERR(data);
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val = (data->fan_ctrl[attr->index] & SCH5636_FAN_NOT_PRESENT) ? 1 : 0;
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return snprintf(buf, PAGE_SIZE, "%d\n", val);
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}
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static ssize_t fan_alarm_show(struct device *dev,
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struct device_attribute *devattr, char *buf)
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{
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
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struct sch5636_data *data = sch5636_update_device(dev);
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int val;
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if (IS_ERR(data))
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return PTR_ERR(data);
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val = (data->fan_ctrl[attr->index] & SCH5636_FAN_ALARM) ? 1 : 0;
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return snprintf(buf, PAGE_SIZE, "%d\n", val);
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}
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static struct sensor_device_attribute sch5636_attr[] = {
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SENSOR_ATTR_RO(name, name, 0),
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SENSOR_ATTR_RO(in0_input, in_value, 0),
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SENSOR_ATTR_RO(in0_label, in_label, 0),
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SENSOR_ATTR_RO(in1_input, in_value, 1),
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SENSOR_ATTR_RO(in1_label, in_label, 1),
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SENSOR_ATTR_RO(in2_input, in_value, 2),
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SENSOR_ATTR_RO(in2_label, in_label, 2),
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SENSOR_ATTR_RO(in3_input, in_value, 3),
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SENSOR_ATTR_RO(in3_label, in_label, 3),
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SENSOR_ATTR_RO(in4_input, in_value, 4),
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SENSOR_ATTR_RO(in4_label, in_label, 4),
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};
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static struct sensor_device_attribute sch5636_temp_attr[] = {
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SENSOR_ATTR_RO(temp1_input, temp_value, 0),
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SENSOR_ATTR_RO(temp1_fault, temp_fault, 0),
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SENSOR_ATTR_RO(temp1_alarm, temp_alarm, 0),
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SENSOR_ATTR_RO(temp2_input, temp_value, 1),
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SENSOR_ATTR_RO(temp2_fault, temp_fault, 1),
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SENSOR_ATTR_RO(temp2_alarm, temp_alarm, 1),
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SENSOR_ATTR_RO(temp3_input, temp_value, 2),
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SENSOR_ATTR_RO(temp3_fault, temp_fault, 2),
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SENSOR_ATTR_RO(temp3_alarm, temp_alarm, 2),
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SENSOR_ATTR_RO(temp4_input, temp_value, 3),
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SENSOR_ATTR_RO(temp4_fault, temp_fault, 3),
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SENSOR_ATTR_RO(temp4_alarm, temp_alarm, 3),
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SENSOR_ATTR_RO(temp5_input, temp_value, 4),
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SENSOR_ATTR_RO(temp5_fault, temp_fault, 4),
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SENSOR_ATTR_RO(temp5_alarm, temp_alarm, 4),
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SENSOR_ATTR_RO(temp6_input, temp_value, 5),
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SENSOR_ATTR_RO(temp6_fault, temp_fault, 5),
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SENSOR_ATTR_RO(temp6_alarm, temp_alarm, 5),
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SENSOR_ATTR_RO(temp7_input, temp_value, 6),
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SENSOR_ATTR_RO(temp7_fault, temp_fault, 6),
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SENSOR_ATTR_RO(temp7_alarm, temp_alarm, 6),
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SENSOR_ATTR_RO(temp8_input, temp_value, 7),
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SENSOR_ATTR_RO(temp8_fault, temp_fault, 7),
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SENSOR_ATTR_RO(temp8_alarm, temp_alarm, 7),
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SENSOR_ATTR_RO(temp9_input, temp_value, 8),
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SENSOR_ATTR_RO(temp9_fault, temp_fault, 8),
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SENSOR_ATTR_RO(temp9_alarm, temp_alarm, 8),
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SENSOR_ATTR_RO(temp10_input, temp_value, 9),
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SENSOR_ATTR_RO(temp10_fault, temp_fault, 9),
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SENSOR_ATTR_RO(temp10_alarm, temp_alarm, 9),
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SENSOR_ATTR_RO(temp11_input, temp_value, 10),
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SENSOR_ATTR_RO(temp11_fault, temp_fault, 10),
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SENSOR_ATTR_RO(temp11_alarm, temp_alarm, 10),
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SENSOR_ATTR_RO(temp12_input, temp_value, 11),
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SENSOR_ATTR_RO(temp12_fault, temp_fault, 11),
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SENSOR_ATTR_RO(temp12_alarm, temp_alarm, 11),
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SENSOR_ATTR_RO(temp13_input, temp_value, 12),
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SENSOR_ATTR_RO(temp13_fault, temp_fault, 12),
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SENSOR_ATTR_RO(temp13_alarm, temp_alarm, 12),
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SENSOR_ATTR_RO(temp14_input, temp_value, 13),
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SENSOR_ATTR_RO(temp14_fault, temp_fault, 13),
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SENSOR_ATTR_RO(temp14_alarm, temp_alarm, 13),
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SENSOR_ATTR_RO(temp15_input, temp_value, 14),
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SENSOR_ATTR_RO(temp15_fault, temp_fault, 14),
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SENSOR_ATTR_RO(temp15_alarm, temp_alarm, 14),
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SENSOR_ATTR_RO(temp16_input, temp_value, 15),
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SENSOR_ATTR_RO(temp16_fault, temp_fault, 15),
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SENSOR_ATTR_RO(temp16_alarm, temp_alarm, 15),
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};
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static struct sensor_device_attribute sch5636_fan_attr[] = {
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SENSOR_ATTR_RO(fan1_input, fan_value, 0),
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SENSOR_ATTR_RO(fan1_fault, fan_fault, 0),
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SENSOR_ATTR_RO(fan1_alarm, fan_alarm, 0),
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SENSOR_ATTR_RO(fan2_input, fan_value, 1),
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SENSOR_ATTR_RO(fan2_fault, fan_fault, 1),
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SENSOR_ATTR_RO(fan2_alarm, fan_alarm, 1),
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SENSOR_ATTR_RO(fan3_input, fan_value, 2),
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SENSOR_ATTR_RO(fan3_fault, fan_fault, 2),
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SENSOR_ATTR_RO(fan3_alarm, fan_alarm, 2),
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SENSOR_ATTR_RO(fan4_input, fan_value, 3),
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SENSOR_ATTR_RO(fan4_fault, fan_fault, 3),
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SENSOR_ATTR_RO(fan4_alarm, fan_alarm, 3),
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SENSOR_ATTR_RO(fan5_input, fan_value, 4),
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SENSOR_ATTR_RO(fan5_fault, fan_fault, 4),
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SENSOR_ATTR_RO(fan5_alarm, fan_alarm, 4),
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SENSOR_ATTR_RO(fan6_input, fan_value, 5),
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SENSOR_ATTR_RO(fan6_fault, fan_fault, 5),
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SENSOR_ATTR_RO(fan6_alarm, fan_alarm, 5),
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SENSOR_ATTR_RO(fan7_input, fan_value, 6),
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SENSOR_ATTR_RO(fan7_fault, fan_fault, 6),
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SENSOR_ATTR_RO(fan7_alarm, fan_alarm, 6),
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SENSOR_ATTR_RO(fan8_input, fan_value, 7),
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SENSOR_ATTR_RO(fan8_fault, fan_fault, 7),
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SENSOR_ATTR_RO(fan8_alarm, fan_alarm, 7),
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};
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static int sch5636_remove(struct platform_device *pdev)
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{
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struct sch5636_data *data = platform_get_drvdata(pdev);
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int i;
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if (data->watchdog)
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sch56xx_watchdog_unregister(data->watchdog);
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if (data->hwmon_dev)
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hwmon_device_unregister(data->hwmon_dev);
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for (i = 0; i < ARRAY_SIZE(sch5636_attr); i++)
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device_remove_file(&pdev->dev, &sch5636_attr[i].dev_attr);
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for (i = 0; i < SCH5636_NO_TEMPS * 3; i++)
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device_remove_file(&pdev->dev,
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&sch5636_temp_attr[i].dev_attr);
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for (i = 0; i < SCH5636_NO_FANS * 3; i++)
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device_remove_file(&pdev->dev,
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&sch5636_fan_attr[i].dev_attr);
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return 0;
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}
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static int sch5636_probe(struct platform_device *pdev)
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{
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struct sch5636_data *data;
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int i, err, val, revision[2];
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char id[4];
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data = devm_kzalloc(&pdev->dev, sizeof(struct sch5636_data),
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GFP_KERNEL);
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if (!data)
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return -ENOMEM;
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data->addr = platform_get_resource(pdev, IORESOURCE_IO, 0)->start;
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mutex_init(&data->update_lock);
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platform_set_drvdata(pdev, data);
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for (i = 0; i < 3; i++) {
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val = sch56xx_read_virtual_reg(data->addr,
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SCH5636_REG_FUJITSU_ID + i);
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if (val < 0) {
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pr_err("Could not read Fujitsu id byte at %#x\n",
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SCH5636_REG_FUJITSU_ID + i);
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err = val;
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|
goto error;
|
|
}
|
|
id[i] = val;
|
|
}
|
|
id[i] = '\0';
|
|
|
|
if (strcmp(id, "THS")) {
|
|
pr_err("Unknown Fujitsu id: %02x%02x%02x\n",
|
|
id[0], id[1], id[2]);
|
|
err = -ENODEV;
|
|
goto error;
|
|
}
|
|
|
|
for (i = 0; i < 2; i++) {
|
|
val = sch56xx_read_virtual_reg(data->addr,
|
|
SCH5636_REG_FUJITSU_REV + i);
|
|
if (val < 0) {
|
|
err = val;
|
|
goto error;
|
|
}
|
|
revision[i] = val;
|
|
}
|
|
pr_info("Found %s chip at %#hx, revision: %d.%02d\n", DEVNAME,
|
|
data->addr, revision[0], revision[1]);
|
|
|
|
/* Read all temp + fan ctrl registers to determine which are active */
|
|
for (i = 0; i < SCH5636_NO_TEMPS; i++) {
|
|
val = sch56xx_read_virtual_reg(data->addr,
|
|
SCH5636_REG_TEMP_CTRL(i));
|
|
if (unlikely(val < 0)) {
|
|
err = val;
|
|
goto error;
|
|
}
|
|
data->temp_ctrl[i] = val;
|
|
}
|
|
|
|
for (i = 0; i < SCH5636_NO_FANS; i++) {
|
|
val = sch56xx_read_virtual_reg(data->addr,
|
|
SCH5636_REG_FAN_CTRL(i));
|
|
if (unlikely(val < 0)) {
|
|
err = val;
|
|
goto error;
|
|
}
|
|
data->fan_ctrl[i] = val;
|
|
}
|
|
|
|
for (i = 0; i < ARRAY_SIZE(sch5636_attr); i++) {
|
|
err = device_create_file(&pdev->dev,
|
|
&sch5636_attr[i].dev_attr);
|
|
if (err)
|
|
goto error;
|
|
}
|
|
|
|
for (i = 0; i < (SCH5636_NO_TEMPS * 3); i++) {
|
|
if (data->temp_ctrl[i/3] & SCH5636_TEMP_DEACTIVATED)
|
|
continue;
|
|
|
|
err = device_create_file(&pdev->dev,
|
|
&sch5636_temp_attr[i].dev_attr);
|
|
if (err)
|
|
goto error;
|
|
}
|
|
|
|
for (i = 0; i < (SCH5636_NO_FANS * 3); i++) {
|
|
if (data->fan_ctrl[i/3] & SCH5636_FAN_DEACTIVATED)
|
|
continue;
|
|
|
|
err = device_create_file(&pdev->dev,
|
|
&sch5636_fan_attr[i].dev_attr);
|
|
if (err)
|
|
goto error;
|
|
}
|
|
|
|
data->hwmon_dev = hwmon_device_register(&pdev->dev);
|
|
if (IS_ERR(data->hwmon_dev)) {
|
|
err = PTR_ERR(data->hwmon_dev);
|
|
data->hwmon_dev = NULL;
|
|
goto error;
|
|
}
|
|
|
|
/* Note failing to register the watchdog is not a fatal error */
|
|
data->watchdog = sch56xx_watchdog_register(&pdev->dev, data->addr,
|
|
(revision[0] << 8) | revision[1],
|
|
&data->update_lock, 0);
|
|
|
|
return 0;
|
|
|
|
error:
|
|
sch5636_remove(pdev);
|
|
return err;
|
|
}
|
|
|
|
static struct platform_driver sch5636_driver = {
|
|
.driver = {
|
|
.name = DRVNAME,
|
|
},
|
|
.probe = sch5636_probe,
|
|
.remove = sch5636_remove,
|
|
};
|
|
|
|
module_platform_driver(sch5636_driver);
|
|
|
|
MODULE_DESCRIPTION("SMSC SCH5636 Hardware Monitoring Driver");
|
|
MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
|
|
MODULE_LICENSE("GPL");
|