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path: root/drivers/thermal/intel_pch_thermal.c
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Diffstat (limited to 'drivers/thermal/intel_pch_thermal.c')
-rw-r--r--drivers/thermal/intel_pch_thermal.c421
1 files changed, 0 insertions, 421 deletions
diff --git a/drivers/thermal/intel_pch_thermal.c b/drivers/thermal/intel_pch_thermal.c
deleted file mode 100644
index 2b49e8d0fe9e..000000000000
--- a/drivers/thermal/intel_pch_thermal.c
+++ /dev/null
@@ -1,421 +0,0 @@
-/* intel_pch_thermal.c - Intel PCH Thermal driver
- *
- * Copyright (c) 2015, Intel Corporation.
- *
- * Authors:
- * Tushar Dave <tushar.n.dave@intel.com>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope 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/types.h>
-#include <linux/init.h>
-#include <linux/pci.h>
-#include <linux/acpi.h>
-#include <linux/thermal.h>
-#include <linux/pm.h>
-
-/* Intel PCH thermal Device IDs */
-#define PCH_THERMAL_DID_HSW_1 0x9C24 /* Haswell PCH */
-#define PCH_THERMAL_DID_HSW_2 0x8C24 /* Haswell PCH */
-#define PCH_THERMAL_DID_WPT 0x9CA4 /* Wildcat Point */
-#define PCH_THERMAL_DID_SKL 0x9D31 /* Skylake PCH */
-#define PCH_THERMAL_DID_SKL_H 0xA131 /* Skylake PCH 100 series */
-
-/* Wildcat Point-LP PCH Thermal registers */
-#define WPT_TEMP 0x0000 /* Temperature */
-#define WPT_TSC 0x04 /* Thermal Sensor Control */
-#define WPT_TSS 0x06 /* Thermal Sensor Status */
-#define WPT_TSEL 0x08 /* Thermal Sensor Enable and Lock */
-#define WPT_TSREL 0x0A /* Thermal Sensor Report Enable and Lock */
-#define WPT_TSMIC 0x0C /* Thermal Sensor SMI Control */
-#define WPT_CTT 0x0010 /* Catastrophic Trip Point */
-#define WPT_TAHV 0x0014 /* Thermal Alert High Value */
-#define WPT_TALV 0x0018 /* Thermal Alert Low Value */
-#define WPT_TL 0x00000040 /* Throttle Value */
-#define WPT_PHL 0x0060 /* PCH Hot Level */
-#define WPT_PHLC 0x62 /* PHL Control */
-#define WPT_TAS 0x80 /* Thermal Alert Status */
-#define WPT_TSPIEN 0x82 /* PCI Interrupt Event Enables */
-#define WPT_TSGPEN 0x84 /* General Purpose Event Enables */
-
-/* Wildcat Point-LP PCH Thermal Register bit definitions */
-#define WPT_TEMP_TSR 0x00ff /* Temp TS Reading */
-#define WPT_TSC_CPDE 0x01 /* Catastrophic Power-Down Enable */
-#define WPT_TSS_TSDSS 0x10 /* Thermal Sensor Dynamic Shutdown Status */
-#define WPT_TSS_GPES 0x08 /* GPE status */
-#define WPT_TSEL_ETS 0x01 /* Enable TS */
-#define WPT_TSEL_PLDB 0x80 /* TSEL Policy Lock-Down Bit */
-#define WPT_TL_TOL 0x000001FF /* T0 Level */
-#define WPT_TL_T1L 0x1ff00000 /* T1 Level */
-#define WPT_TL_TTEN 0x20000000 /* TT Enable */
-
-static char driver_name[] = "Intel PCH thermal driver";
-
-struct pch_thermal_device {
- void __iomem *hw_base;
- const struct pch_dev_ops *ops;
- struct pci_dev *pdev;
- struct thermal_zone_device *tzd;
- int crt_trip_id;
- unsigned long crt_temp;
- int hot_trip_id;
- unsigned long hot_temp;
- int psv_trip_id;
- unsigned long psv_temp;
- bool bios_enabled;
-};
-
-#ifdef CONFIG_ACPI
-
-/*
- * On some platforms, there is a companion ACPI device, which adds
- * passive trip temperature using _PSV method. There is no specific
- * passive temperature setting in MMIO interface of this PCI device.
- */
-static void pch_wpt_add_acpi_psv_trip(struct pch_thermal_device *ptd,
- int *nr_trips)
-{
- struct acpi_device *adev;
-
- ptd->psv_trip_id = -1;
-
- adev = ACPI_COMPANION(&ptd->pdev->dev);
- if (adev) {
- unsigned long long r;
- acpi_status status;
-
- status = acpi_evaluate_integer(adev->handle, "_PSV", NULL,
- &r);
- if (ACPI_SUCCESS(status)) {
- unsigned long trip_temp;
-
- trip_temp = DECI_KELVIN_TO_MILLICELSIUS(r);
- if (trip_temp) {
- ptd->psv_temp = trip_temp;
- ptd->psv_trip_id = *nr_trips;
- ++(*nr_trips);
- }
- }
- }
-}
-#else
-static void pch_wpt_add_acpi_psv_trip(struct pch_thermal_device *ptd,
- int *nr_trips)
-{
- ptd->psv_trip_id = -1;
-
-}
-#endif
-
-static int pch_wpt_init(struct pch_thermal_device *ptd, int *nr_trips)
-{
- u8 tsel;
- u16 trip_temp;
-
- *nr_trips = 0;
-
- /* Check if BIOS has already enabled thermal sensor */
- if (WPT_TSS_TSDSS & readb(ptd->hw_base + WPT_TSS)) {
- ptd->bios_enabled = true;
- goto read_trips;
- }
-
- tsel = readb(ptd->hw_base + WPT_TSEL);
- /*
- * When TSEL's Policy Lock-Down bit is 1, TSEL become RO.
- * If so, thermal sensor cannot enable. Bail out.
- */
- if (tsel & WPT_TSEL_PLDB) {
- dev_err(&ptd->pdev->dev, "Sensor can't be enabled\n");
- return -ENODEV;
- }
-
- writeb(tsel|WPT_TSEL_ETS, ptd->hw_base + WPT_TSEL);
- if (!(WPT_TSS_TSDSS & readb(ptd->hw_base + WPT_TSS))) {
- dev_err(&ptd->pdev->dev, "Sensor can't be enabled\n");
- return -ENODEV;
- }
-
-read_trips:
- ptd->crt_trip_id = -1;
- trip_temp = readw(ptd->hw_base + WPT_CTT);
- trip_temp &= 0x1FF;
- if (trip_temp) {
- /* Resolution of 1/2 degree C and an offset of -50C */
- ptd->crt_temp = trip_temp * 1000 / 2 - 50000;
- ptd->crt_trip_id = 0;
- ++(*nr_trips);
- }
-
- ptd->hot_trip_id = -1;
- trip_temp = readw(ptd->hw_base + WPT_PHL);
- trip_temp &= 0x1FF;
- if (trip_temp) {
- /* Resolution of 1/2 degree C and an offset of -50C */
- ptd->hot_temp = trip_temp * 1000 / 2 - 50000;
- ptd->hot_trip_id = *nr_trips;
- ++(*nr_trips);
- }
-
- pch_wpt_add_acpi_psv_trip(ptd, nr_trips);
-
- return 0;
-}
-
-static int pch_wpt_get_temp(struct pch_thermal_device *ptd, int *temp)
-{
- u8 wpt_temp;
-
- wpt_temp = WPT_TEMP_TSR & readl(ptd->hw_base + WPT_TEMP);
-
- /* Resolution of 1/2 degree C and an offset of -50C */
- *temp = (wpt_temp * 1000 / 2 - 50000);
-
- return 0;
-}
-
-static int pch_wpt_suspend(struct pch_thermal_device *ptd)
-{
- u8 tsel;
-
- if (ptd->bios_enabled)
- return 0;
-
- tsel = readb(ptd->hw_base + WPT_TSEL);
-
- writeb(tsel & 0xFE, ptd->hw_base + WPT_TSEL);
-
- return 0;
-}
-
-static int pch_wpt_resume(struct pch_thermal_device *ptd)
-{
- u8 tsel;
-
- if (ptd->bios_enabled)
- return 0;
-
- tsel = readb(ptd->hw_base + WPT_TSEL);
-
- writeb(tsel | WPT_TSEL_ETS, ptd->hw_base + WPT_TSEL);
-
- return 0;
-}
-
-struct pch_dev_ops {
- int (*hw_init)(struct pch_thermal_device *ptd, int *nr_trips);
- int (*get_temp)(struct pch_thermal_device *ptd, int *temp);
- int (*suspend)(struct pch_thermal_device *ptd);
- int (*resume)(struct pch_thermal_device *ptd);
-};
-
-
-/* dev ops for Wildcat Point */
-static const struct pch_dev_ops pch_dev_ops_wpt = {
- .hw_init = pch_wpt_init,
- .get_temp = pch_wpt_get_temp,
- .suspend = pch_wpt_suspend,
- .resume = pch_wpt_resume,
-};
-
-static int pch_thermal_get_temp(struct thermal_zone_device *tzd, int *temp)
-{
- struct pch_thermal_device *ptd = tzd->devdata;
-
- return ptd->ops->get_temp(ptd, temp);
-}
-
-static int pch_get_trip_type(struct thermal_zone_device *tzd, int trip,
- enum thermal_trip_type *type)
-{
- struct pch_thermal_device *ptd = tzd->devdata;
-
- if (ptd->crt_trip_id == trip)
- *type = THERMAL_TRIP_CRITICAL;
- else if (ptd->hot_trip_id == trip)
- *type = THERMAL_TRIP_HOT;
- else if (ptd->psv_trip_id == trip)
- *type = THERMAL_TRIP_PASSIVE;
- else
- return -EINVAL;
-
- return 0;
-}
-
-static int pch_get_trip_temp(struct thermal_zone_device *tzd, int trip, int *temp)
-{
- struct pch_thermal_device *ptd = tzd->devdata;
-
- if (ptd->crt_trip_id == trip)
- *temp = ptd->crt_temp;
- else if (ptd->hot_trip_id == trip)
- *temp = ptd->hot_temp;
- else if (ptd->psv_trip_id == trip)
- *temp = ptd->psv_temp;
- else
- return -EINVAL;
-
- return 0;
-}
-
-static struct thermal_zone_device_ops tzd_ops = {
- .get_temp = pch_thermal_get_temp,
- .get_trip_type = pch_get_trip_type,
- .get_trip_temp = pch_get_trip_temp,
-};
-
-enum board_ids {
- board_hsw,
- board_wpt,
- board_skl,
-};
-
-static const struct board_info {
- const char *name;
- const struct pch_dev_ops *ops;
-} board_info[] = {
- [board_hsw] = {
- .name = "pch_haswell",
- .ops = &pch_dev_ops_wpt,
- },
- [board_wpt] = {
- .name = "pch_wildcat_point",
- .ops = &pch_dev_ops_wpt,
- },
- [board_skl] = {
- .name = "pch_skylake",
- .ops = &pch_dev_ops_wpt,
- },
-};
-
-static int intel_pch_thermal_probe(struct pci_dev *pdev,
- const struct pci_device_id *id)
-{
- enum board_ids board_id = id->driver_data;
- const struct board_info *bi = &board_info[board_id];
- struct pch_thermal_device *ptd;
- int err;
- int nr_trips;
-
- ptd = devm_kzalloc(&pdev->dev, sizeof(*ptd), GFP_KERNEL);
- if (!ptd)
- return -ENOMEM;
-
- ptd->ops = bi->ops;
-
- pci_set_drvdata(pdev, ptd);
- ptd->pdev = pdev;
-
- err = pci_enable_device(pdev);
- if (err) {
- dev_err(&pdev->dev, "failed to enable pci device\n");
- return err;
- }
-
- err = pci_request_regions(pdev, driver_name);
- if (err) {
- dev_err(&pdev->dev, "failed to request pci region\n");
- goto error_disable;
- }
-
- ptd->hw_base = pci_ioremap_bar(pdev, 0);
- if (!ptd->hw_base) {
- err = -ENOMEM;
- dev_err(&pdev->dev, "failed to map mem base\n");
- goto error_release;
- }
-
- err = ptd->ops->hw_init(ptd, &nr_trips);
- if (err)
- goto error_cleanup;
-
- ptd->tzd = thermal_zone_device_register(bi->name, nr_trips, 0, ptd,
- &tzd_ops, NULL, 0, 0);
- if (IS_ERR(ptd->tzd)) {
- dev_err(&pdev->dev, "Failed to register thermal zone %s\n",
- bi->name);
- err = PTR_ERR(ptd->tzd);
- goto error_cleanup;
- }
-
- return 0;
-
-error_cleanup:
- iounmap(ptd->hw_base);
-error_release:
- pci_release_regions(pdev);
-error_disable:
- pci_disable_device(pdev);
- dev_err(&pdev->dev, "pci device failed to probe\n");
- return err;
-}
-
-static void intel_pch_thermal_remove(struct pci_dev *pdev)
-{
- struct pch_thermal_device *ptd = pci_get_drvdata(pdev);
-
- thermal_zone_device_unregister(ptd->tzd);
- iounmap(ptd->hw_base);
- pci_set_drvdata(pdev, NULL);
- pci_release_region(pdev, 0);
- pci_disable_device(pdev);
-}
-
-static int intel_pch_thermal_suspend(struct device *device)
-{
- struct pci_dev *pdev = to_pci_dev(device);
- struct pch_thermal_device *ptd = pci_get_drvdata(pdev);
-
- return ptd->ops->suspend(ptd);
-}
-
-static int intel_pch_thermal_resume(struct device *device)
-{
- struct pci_dev *pdev = to_pci_dev(device);
- struct pch_thermal_device *ptd = pci_get_drvdata(pdev);
-
- return ptd->ops->resume(ptd);
-}
-
-static struct pci_device_id intel_pch_thermal_id[] = {
- { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCH_THERMAL_DID_HSW_1),
- .driver_data = board_hsw, },
- { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCH_THERMAL_DID_HSW_2),
- .driver_data = board_hsw, },
- { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCH_THERMAL_DID_WPT),
- .driver_data = board_wpt, },
- { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCH_THERMAL_DID_SKL),
- .driver_data = board_skl, },
- { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCH_THERMAL_DID_SKL_H),
- .driver_data = board_skl, },
- { 0, },
-};
-MODULE_DEVICE_TABLE(pci, intel_pch_thermal_id);
-
-static const struct dev_pm_ops intel_pch_pm_ops = {
- .suspend = intel_pch_thermal_suspend,
- .resume = intel_pch_thermal_resume,
-};
-
-static struct pci_driver intel_pch_thermal_driver = {
- .name = "intel_pch_thermal",
- .id_table = intel_pch_thermal_id,
- .probe = intel_pch_thermal_probe,
- .remove = intel_pch_thermal_remove,
- .driver.pm = &intel_pch_pm_ops,
-};
-
-module_pci_driver(intel_pch_thermal_driver);
-
-MODULE_LICENSE("GPL v2");
-MODULE_DESCRIPTION("Intel PCH Thermal driver");
generated by cgit (git 2.34.1) at 2025-12-26 17:17:59 +0000