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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /drivers/hwmon/i5500_temp.c
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/hwmon/i5500_temp.c')
-rw-r--r--drivers/hwmon/i5500_temp.c148
1 files changed, 148 insertions, 0 deletions
diff --git a/drivers/hwmon/i5500_temp.c b/drivers/hwmon/i5500_temp.c
new file mode 100644
index 0000000000..7b00b38c7f
--- /dev/null
+++ b/drivers/hwmon/i5500_temp.c
@@ -0,0 +1,148 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * i5500_temp - Driver for Intel 5500/5520/X58 chipset thermal sensor
+ *
+ * Copyright (C) 2012, 2014 Jean Delvare <jdelvare@suse.de>
+ */
+
+#include <linux/bitops.h>
+#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/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
+
+static umode_t i5500_is_visible(const void *drvdata, enum hwmon_sensor_types type, u32 attr,
+ int channel)
+{
+ return 0444;
+}
+
+static int i5500_read(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel,
+ long *val)
+{
+ struct pci_dev *pdev = to_pci_dev(dev->parent);
+ u16 tsthr;
+ s8 tsfsc;
+ u8 ctsts;
+
+ switch (type) {
+ case hwmon_temp:
+ switch (attr) {
+ /* Sensor resolution : 0.5 degree C */
+ case hwmon_temp_input:
+ pci_read_config_word(pdev, REG_TSTHRHI, &tsthr);
+ pci_read_config_byte(pdev, REG_TSFSC, &tsfsc);
+ *val = (tsthr - tsfsc) * 500;
+ return 0;
+ case hwmon_temp_max:
+ pci_read_config_word(pdev, REG_TSTHRHI, &tsthr);
+ *val = tsthr * 500;
+ return 0;
+ case hwmon_temp_max_hyst:
+ pci_read_config_word(pdev, REG_TSTHRLO, &tsthr);
+ *val = tsthr * 500;
+ return 0;
+ case hwmon_temp_crit:
+ pci_read_config_word(pdev, REG_TSTHRCATA, &tsthr);
+ *val = tsthr * 500;
+ return 0;
+ case hwmon_temp_max_alarm:
+ pci_read_config_byte(pdev, REG_CTSTS, &ctsts);
+ *val = !!(ctsts & BIT(1));
+ return 0;
+ case hwmon_temp_crit_alarm:
+ pci_read_config_byte(pdev, REG_CTSTS, &ctsts);
+ *val = !!(ctsts & BIT(0));
+ return 0;
+ default:
+ break;
+ }
+ break;
+ default:
+ break;
+ }
+
+ return -EOPNOTSUPP;
+}
+
+static const struct hwmon_ops i5500_ops = {
+ .is_visible = i5500_is_visible,
+ .read = i5500_read,
+};
+
+static const struct hwmon_channel_info * const i5500_info[] = {
+ HWMON_CHANNEL_INFO(chip, HWMON_C_REGISTER_TZ),
+ HWMON_CHANNEL_INFO(temp,
+ HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_MAX_HYST | HWMON_T_CRIT |
+ HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM
+ ),
+ NULL
+};
+
+static const struct hwmon_chip_info i5500_chip_info = {
+ .ops = &i5500_ops,
+ .info = i5500_info,
+};
+
+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 = pcim_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_info(&pdev->dev, "intel5500", NULL,
+ &i5500_chip_info, NULL);
+ 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");