thermal: Add Intel PCH thermal driver (d0a12625) · Commits · e / devices / android_kernel_oneplus_sm8150

drivers/thermal/Kconfig

+8 −0

Original line number	Original line	Diff line number	Diff line
	@@ -340,6 +340,14 @@ config ACPI_THERMAL_REL
	tristate		tristate
	depends on ACPI		depends on ACPI

			config INTEL_PCH_THERMAL
			tristate "Intel PCH Thermal Reporting Driver"
			depends on X86 && PCI
			help
			Enable this to support thermal reporting on certain intel PCHs.
			Thermal reporting device will provide temperature reading,
			programmable trip points and other information.

	menu "Texas Instruments thermal drivers"		menu "Texas Instruments thermal drivers"
	source "drivers/thermal/ti-soc-thermal/Kconfig"		source "drivers/thermal/ti-soc-thermal/Kconfig"
	endmenu		endmenu

drivers/thermal/Makefile

+1 −0

Original line number	Original line	Diff line number	Diff line
	@@ -41,6 +41,7 @@ obj-$(CONFIG_INTEL_SOC_DTS_THERMAL) += intel_soc_dts_thermal.o
	obj-$(CONFIG_INTEL_QUARK_DTS_THERMAL) += intel_quark_dts_thermal.o		obj-$(CONFIG_INTEL_QUARK_DTS_THERMAL) += intel_quark_dts_thermal.o
	obj-$(CONFIG_TI_SOC_THERMAL) += ti-soc-thermal/		obj-$(CONFIG_TI_SOC_THERMAL) += ti-soc-thermal/
	obj-$(CONFIG_INT340X_THERMAL) += int340x_thermal/		obj-$(CONFIG_INT340X_THERMAL) += int340x_thermal/
			obj-$(CONFIG_INTEL_PCH_THERMAL) += intel_pch_thermal.o
	obj-$(CONFIG_ST_THERMAL) += st/		obj-$(CONFIG_ST_THERMAL) += st/
	obj-$(CONFIG_TEGRA_SOCTHERM) += tegra_soctherm.o		obj-$(CONFIG_TEGRA_SOCTHERM) += tegra_soctherm.o
	obj-$(CONFIG_HISI_THERMAL) += hisi_thermal.o		obj-$(CONFIG_HISI_THERMAL) += hisi_thermal.o

drivers/thermal/intel_pch_thermal.c

0 → 100644

+286 −0

Original line number	Original line	Diff line number	Diff line
			/* 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/thermal.h>

			/* Intel PCH thermal Device IDs */
			#define PCH_THERMAL_DID_WPT 0x9CA4 /* Wildcat Point */

			/* 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;
			};

			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))
			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);
			}

			return 0;
			}

			static int pch_wpt_get_temp(struct pch_thermal_device *ptd,
			unsigned long *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;
			}

			struct pch_dev_ops {
			int (hw_init)(struct pch_thermal_device ptd, int *nr_trips);
			int (get_temp)(struct pch_thermal_device ptd, unsigned long *temp);
			};


			/* dev ops for Wildcat Point */
			static struct pch_dev_ops pch_dev_ops_wpt = {
			.hw_init = pch_wpt_init,
			.get_temp = pch_wpt_get_temp,
			};

			static int pch_thermal_get_temp(struct thermal_zone_device *tzd,
			unsigned long *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
			return -EINVAL;

			return 0;
			}

			static int pch_get_trip_temp(struct thermal_zone_device *tzd, int trip,
			unsigned long *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
			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,
			};


			static int intel_pch_thermal_probe(struct pci_dev *pdev,
			const struct pci_device_id *id)
			{
			struct pch_thermal_device *ptd;
			int err;
			int nr_trips;
			char *dev_name;

			ptd = devm_kzalloc(&pdev->dev, sizeof(*ptd), GFP_KERNEL);
			if (!ptd)
			return -ENOMEM;

			switch (pdev->device) {
			case PCH_THERMAL_DID_WPT:
			ptd->ops = &pch_dev_ops_wpt;
			dev_name = "pch_wildcat_point";
			break;
			default:
			dev_err(&pdev->dev, "unknown pch thermal device\n");
			return -ENODEV;
			}

			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(dev_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",
			dev_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 struct pci_device_id intel_pch_thermal_id[] = {
			{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCH_THERMAL_DID_WPT) },
			{ 0, },
			};
			MODULE_DEVICE_TABLE(pci, intel_pch_thermal_id);

			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,
			};

			module_pci_driver(intel_pch_thermal_driver);

			MODULE_LICENSE("GPL v2");
			MODULE_DESCRIPTION("Intel PCH Thermal driver");