/* * i5500_temp - Driver for Intel 5500/5520/X58 chipset thermal sensor * * Copyright (C) 2012, 2014 Jean Delvare <jdelvare@suse.de> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. */ #include <linux/module.h> #include <linux/init.h> #include <linux/slab.h> #include <linux/jiffies.h> #include <linux/device.h> #include <linux/pci.h> #include <linux/hwmon.h> #include <linux/hwmon-sysfs.h> #include <linux/err.h> #include <linux/mutex.h> /* Register definitions from datasheet */ #define REG_TSTHRCATA 0xE2 #define REG_TSCTRL 0xE8 #define REG_TSTHRRPEX 0xEB #define REG_TSTHRLO 0xEC #define REG_TSTHRHI 0xEE #define REG_CTHINT 0xF0 #define REG_TSFSC 0xF3 #define REG_CTSTS 0xF4 #define REG_TSTHRRQPI 0xF5 #define REG_CTCTRL 0xF7 #define REG_TSTIMER 0xF8 /* * Sysfs stuff */ /* Sensor resolution : 0.5 degree C */ static ssize_t temp1_input_show(struct device *dev, struct device_attribute *devattr, char *buf) { struct pci_dev *pdev = to_pci_dev(dev->parent); long temp; u16 tsthrhi; s8 tsfsc; pci_read_config_word(pdev, REG_TSTHRHI, &tsthrhi); pci_read_config_byte(pdev, REG_TSFSC, &tsfsc); temp = ((long)tsthrhi - tsfsc) * 500; return sprintf(buf, "%ld\n", temp); } static ssize_t show_thresh(struct device *dev, struct device_attribute *devattr, char *buf) { struct pci_dev *pdev = to_pci_dev(dev->parent); int reg = to_sensor_dev_attr(devattr)->index; long temp; u16 tsthr; pci_read_config_word(pdev, reg, &tsthr); temp = tsthr * 500; return sprintf(buf, "%ld\n", temp); } static ssize_t show_alarm(struct device *dev, struct device_attribute *devattr, char *buf) { struct pci_dev *pdev = to_pci_dev(dev->parent); int nr = to_sensor_dev_attr(devattr)->index; u8 ctsts; pci_read_config_byte(pdev, REG_CTSTS, &ctsts); return sprintf(buf, "%u\n", (unsigned int)ctsts & (1 << nr)); } static DEVICE_ATTR_RO(temp1_input); static SENSOR_DEVICE_ATTR(temp1_crit, S_IRUGO, show_thresh, NULL, 0xE2); static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IRUGO, show_thresh, NULL, 0xEC); static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO, show_thresh, NULL, 0xEE); static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL, 0); static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 1); static struct attribute *i5500_temp_attrs[] = { &dev_attr_temp1_input.attr, &sensor_dev_attr_temp1_crit.dev_attr.attr, &sensor_dev_attr_temp1_max_hyst.dev_attr.attr, &sensor_dev_attr_temp1_max.dev_attr.attr, &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr, &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, NULL }; ATTRIBUTE_GROUPS(i5500_temp); static const struct pci_device_id i5500_temp_ids[] = { { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x3438) }, { 0 }, }; MODULE_DEVICE_TABLE(pci, i5500_temp_ids); static int i5500_temp_probe(struct pci_dev *pdev, const struct pci_device_id *id) { int err; struct device *hwmon_dev; u32 tstimer; s8 tsfsc; err = pci_enable_device(pdev); if (err) { dev_err(&pdev->dev, "Failed to enable device\n"); return err; } pci_read_config_byte(pdev, REG_TSFSC, &tsfsc); pci_read_config_dword(pdev, REG_TSTIMER, &tstimer); if (tsfsc == 0x7F && tstimer == 0x07D30D40) { dev_notice(&pdev->dev, "Sensor seems to be disabled\n"); return -ENODEV; } hwmon_dev = devm_hwmon_device_register_with_groups(&pdev->dev, "intel5500", NULL, i5500_temp_groups); return PTR_ERR_OR_ZERO(hwmon_dev); } static struct pci_driver i5500_temp_driver = { .name = "i5500_temp", .id_table = i5500_temp_ids, .probe = i5500_temp_probe, }; module_pci_driver(i5500_temp_driver); MODULE_AUTHOR("Jean Delvare <jdelvare@suse.de>"); MODULE_DESCRIPTION("Intel 5500/5520/X58 chipset thermal sensor driver"); MODULE_LICENSE("GPL");