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148 lines
3.5 KiB
148 lines
3.5 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* i5500_temp - Driver for Intel 5500/5520/X58 chipset thermal sensor |
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* |
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* Copyright (C) 2012, 2014 Jean Delvare <[email protected]> |
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*/ |
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#include <linux/bitops.h> |
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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/device.h> |
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#include <linux/pci.h> |
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#include <linux/hwmon.h> |
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#include <linux/err.h> |
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#include <linux/mutex.h> |
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/* Register definitions from datasheet */ |
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#define REG_TSTHRCATA 0xE2 |
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#define REG_TSCTRL 0xE8 |
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#define REG_TSTHRRPEX 0xEB |
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#define REG_TSTHRLO 0xEC |
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#define REG_TSTHRHI 0xEE |
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#define REG_CTHINT 0xF0 |
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#define REG_TSFSC 0xF3 |
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#define REG_CTSTS 0xF4 |
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#define REG_TSTHRRQPI 0xF5 |
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#define REG_CTCTRL 0xF7 |
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#define REG_TSTIMER 0xF8 |
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static umode_t i5500_is_visible(const void *drvdata, enum hwmon_sensor_types type, u32 attr, |
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int channel) |
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{ |
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return 0444; |
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} |
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static int i5500_read(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel, |
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long *val) |
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{ |
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struct pci_dev *pdev = to_pci_dev(dev->parent); |
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u16 tsthr; |
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s8 tsfsc; |
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u8 ctsts; |
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switch (type) { |
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case hwmon_temp: |
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switch (attr) { |
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/* Sensor resolution : 0.5 degree C */ |
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case hwmon_temp_input: |
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pci_read_config_word(pdev, REG_TSTHRHI, &tsthr); |
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pci_read_config_byte(pdev, REG_TSFSC, &tsfsc); |
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*val = (tsthr - tsfsc) * 500; |
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return 0; |
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case hwmon_temp_max: |
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pci_read_config_word(pdev, REG_TSTHRHI, &tsthr); |
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*val = tsthr * 500; |
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return 0; |
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case hwmon_temp_max_hyst: |
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pci_read_config_word(pdev, REG_TSTHRLO, &tsthr); |
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*val = tsthr * 500; |
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return 0; |
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case hwmon_temp_crit: |
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pci_read_config_word(pdev, REG_TSTHRCATA, &tsthr); |
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*val = tsthr * 500; |
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return 0; |
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case hwmon_temp_max_alarm: |
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pci_read_config_byte(pdev, REG_CTSTS, &ctsts); |
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*val = !!(ctsts & BIT(1)); |
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return 0; |
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case hwmon_temp_crit_alarm: |
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pci_read_config_byte(pdev, REG_CTSTS, &ctsts); |
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*val = !!(ctsts & BIT(0)); |
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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 const struct hwmon_ops i5500_ops = { |
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.is_visible = i5500_is_visible, |
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.read = i5500_read, |
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}; |
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static const struct hwmon_channel_info *i5500_info[] = { |
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HWMON_CHANNEL_INFO(chip, HWMON_C_REGISTER_TZ), |
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HWMON_CHANNEL_INFO(temp, |
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HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_MAX_HYST | HWMON_T_CRIT | |
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HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM |
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), |
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NULL |
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}; |
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static const struct hwmon_chip_info i5500_chip_info = { |
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.ops = &i5500_ops, |
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.info = i5500_info, |
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}; |
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static const struct pci_device_id i5500_temp_ids[] = { |
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{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x3438) }, |
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{ 0 }, |
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}; |
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MODULE_DEVICE_TABLE(pci, i5500_temp_ids); |
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static int i5500_temp_probe(struct pci_dev *pdev, |
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const struct pci_device_id *id) |
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{ |
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int err; |
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struct device *hwmon_dev; |
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u32 tstimer; |
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s8 tsfsc; |
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err = pci_enable_device(pdev); |
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if (err) { |
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dev_err(&pdev->dev, "Failed to enable device\n"); |
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return err; |
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} |
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pci_read_config_byte(pdev, REG_TSFSC, &tsfsc); |
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pci_read_config_dword(pdev, REG_TSTIMER, &tstimer); |
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if (tsfsc == 0x7F && tstimer == 0x07D30D40) { |
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dev_notice(&pdev->dev, "Sensor seems to be disabled\n"); |
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return -ENODEV; |
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} |
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hwmon_dev = devm_hwmon_device_register_with_info(&pdev->dev, "intel5500", NULL, |
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&i5500_chip_info, NULL); |
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return PTR_ERR_OR_ZERO(hwmon_dev); |
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} |
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static struct pci_driver i5500_temp_driver = { |
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.name = "i5500_temp", |
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.id_table = i5500_temp_ids, |
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.probe = i5500_temp_probe, |
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}; |
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module_pci_driver(i5500_temp_driver); |
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MODULE_AUTHOR("Jean Delvare <[email protected]>"); |
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MODULE_DESCRIPTION("Intel 5500/5520/X58 chipset thermal sensor driver"); |
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MODULE_LICENSE("GPL");
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