[mirror_ubuntu-bionic-kernel.git] / drivers / thermal / intel_pch_thermal.c

/* 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 */
#define PCH_THERMAL_DID_CNL	0x9Df9 /* CNL PCH */
#define PCH_THERMAL_DID_CNL_H	0xA379 /* CNL-H PCH */

/* 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	0x01ff	/* 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_TSEL_ETS & readb(ptd->hw_base + WPT_TSEL)) {
		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_TSEL_ETS & readb(ptd->hw_base + WPT_TSEL))) {
		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)
{
	u16 wpt_temp;

	wpt_temp = WPT_TEMP_TSR & readw(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,
	board_cnl,
};

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,
	},
	[board_cnl] = {
		.name = "pch_cannonlake",
		.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 const 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, },
	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCH_THERMAL_DID_CNL),
		.driver_data = board_cnl, },
	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCH_THERMAL_DID_CNL_H),
		.driver_data = board_cnl, },
	{ 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");
Commit	Line	Data
d0a12625 TD	1	/* intel_pch_thermal.c - Intel PCH Thermal driver
	2	*
	3	* Copyright (c) 2015, Intel Corporation.
	4	*
	5	* Authors:
	6	* Tushar Dave <tushar.n.dave@intel.com>
	7	*
	8	* This program is free software; you can redistribute it and/or modify it
	9	* under the terms and conditions of the GNU General Public License,
	10	* version 2, as published by the Free Software Foundation.
	11	*
	12	* This program is distributed in the hope it will be useful, but WITHOUT
	13	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	14	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	15	* more details.
	16	*
	17	*/
	18
	19	#include <linux/module.h>
	20	#include <linux/types.h>
	21	#include <linux/init.h>
	22	#include <linux/pci.h>
aed3f249	23	#include <linux/acpi.h>
d0a12625	24	#include <linux/thermal.h>
176b1ec2	25	#include <linux/pm.h>
d0a12625 TD	26
d0a12625 TD	27	/* Intel PCH thermal Device IDs */
33086a9a SP	28	#define PCH_THERMAL_DID_HSW_1 0x9C24 /* Haswell PCH */
33086a9a SP	29	#define PCH_THERMAL_DID_HSW_2 0x8C24 /* Haswell PCH */
d0a12625	30	#define PCH_THERMAL_DID_WPT 0x9CA4 /* Wildcat Point */
4cba7d23	31	#define PCH_THERMAL_DID_SKL 0x9D31 /* Skylake PCH */
c6068a6e	32	#define PCH_THERMAL_DID_SKL_H 0xA131 /* Skylake PCH 100 series */
6ed5ed14 SP	33	#define PCH_THERMAL_DID_CNL 0x9Df9 /* CNL PCH */
6ed5ed14 SP	34	#define PCH_THERMAL_DID_CNL_H 0xA379 /* CNL-H PCH */
d0a12625 TD	35
	36	/* Wildcat Point-LP PCH Thermal registers */
	37	#define WPT_TEMP 0x0000 /* Temperature */
	38	#define WPT_TSC 0x04 /* Thermal Sensor Control */
	39	#define WPT_TSS 0x06 /* Thermal Sensor Status */
	40	#define WPT_TSEL 0x08 /* Thermal Sensor Enable and Lock */
	41	#define WPT_TSREL 0x0A /* Thermal Sensor Report Enable and Lock */
	42	#define WPT_TSMIC 0x0C /* Thermal Sensor SMI Control */
	43	#define WPT_CTT 0x0010 /* Catastrophic Trip Point */
	44	#define WPT_TAHV 0x0014 /* Thermal Alert High Value */
	45	#define WPT_TALV 0x0018 /* Thermal Alert Low Value */
	46	#define WPT_TL 0x00000040 /* Throttle Value */
	47	#define WPT_PHL 0x0060 /* PCH Hot Level */
	48	#define WPT_PHLC 0x62 /* PHL Control */
	49	#define WPT_TAS 0x80 /* Thermal Alert Status */
	50	#define WPT_TSPIEN 0x82 /* PCI Interrupt Event Enables */
	51	#define WPT_TSGPEN 0x84 /* General Purpose Event Enables */
	52
	53	/* Wildcat Point-LP PCH Thermal Register bit definitions */
23c973f5	54	#define WPT_TEMP_TSR 0x01ff /* Temp TS Reading */
d0a12625 TD	55	#define WPT_TSC_CPDE 0x01 /* Catastrophic Power-Down Enable */
	56	#define WPT_TSS_TSDSS 0x10 /* Thermal Sensor Dynamic Shutdown Status */
	57	#define WPT_TSS_GPES 0x08 /* GPE status */
	58	#define WPT_TSEL_ETS 0x01 /* Enable TS */
	59	#define WPT_TSEL_PLDB 0x80 /* TSEL Policy Lock-Down Bit */
	60	#define WPT_TL_TOL 0x000001FF /* T0 Level */
	61	#define WPT_TL_T1L 0x1ff00000 /* T1 Level */
	62	#define WPT_TL_TTEN 0x20000000 /* TT Enable */
	63
	64	static char driver_name[] = "Intel PCH thermal driver";
	65
	66	struct pch_thermal_device {
	67	void __iomem *hw_base;
	68	const struct pch_dev_ops *ops;
	69	struct pci_dev *pdev;
	70	struct thermal_zone_device *tzd;
	71	int crt_trip_id;
	72	unsigned long crt_temp;
	73	int hot_trip_id;
	74	unsigned long hot_temp;
aed3f249 SP	75	int psv_trip_id;
aed3f249 SP	76	unsigned long psv_temp;
176b1ec2	77	bool bios_enabled;
d0a12625 TD	78	};
d0a12625 TD	79
aed3f249 SP	80	#ifdef CONFIG_ACPI
	81
	82	/*
	83	* On some platforms, there is a companion ACPI device, which adds
	84	* passive trip temperature using _PSV method. There is no specific
	85	* passive temperature setting in MMIO interface of this PCI device.
	86	*/
	87	static void pch_wpt_add_acpi_psv_trip(struct pch_thermal_device *ptd,
	88	int *nr_trips)
	89	{
	90	struct acpi_device *adev;
	91
	92	ptd->psv_trip_id = -1;
	93
	94	adev = ACPI_COMPANION(&ptd->pdev->dev);
	95	if (adev) {
	96	unsigned long long r;
	97	acpi_status status;
	98
	99	status = acpi_evaluate_integer(adev->handle, "_PSV", NULL,
	100	&r);
	101	if (ACPI_SUCCESS(status)) {
	102	unsigned long trip_temp;
	103
	104	trip_temp = DECI_KELVIN_TO_MILLICELSIUS(r);
	105	if (trip_temp) {
	106	ptd->psv_temp = trip_temp;
	107	ptd->psv_trip_id = *nr_trips;
	108	++(*nr_trips);
	109	}
	110	}
	111	}
	112	}
	113	#else
	114	static void pch_wpt_add_acpi_psv_trip(struct pch_thermal_device *ptd,
	115	int *nr_trips)
	116	{
	117	ptd->psv_trip_id = -1;
	118
	119	}
	120	#endif
	121
d0a12625 TD	122	static int pch_wpt_init(struct pch_thermal_device ptd, int nr_trips)
	123	{
	124	u8 tsel;
	125	u16 trip_temp;
	126
	127	*nr_trips = 0;
	128
	129	/* Check if BIOS has already enabled thermal sensor */
595536e0	130	if (WPT_TSEL_ETS & readb(ptd->hw_base + WPT_TSEL)) {
176b1ec2	131	ptd->bios_enabled = true;
d0a12625	132	goto read_trips;
176b1ec2	133	}
d0a12625 TD	134
	135	tsel = readb(ptd->hw_base + WPT_TSEL);
	136	/*
	137	* When TSEL's Policy Lock-Down bit is 1, TSEL become RO.
	138	* If so, thermal sensor cannot enable. Bail out.
	139	*/
	140	if (tsel & WPT_TSEL_PLDB) {
	141	dev_err(&ptd->pdev->dev, "Sensor can't be enabled\n");
	142	return -ENODEV;
	143	}
	144
	145	writeb(tsel\|WPT_TSEL_ETS, ptd->hw_base + WPT_TSEL);
595536e0	146	if (!(WPT_TSEL_ETS & readb(ptd->hw_base + WPT_TSEL))) {
d0a12625 TD	147	dev_err(&ptd->pdev->dev, "Sensor can't be enabled\n");
	148	return -ENODEV;
	149	}
	150
	151	read_trips:
	152	ptd->crt_trip_id = -1;
	153	trip_temp = readw(ptd->hw_base + WPT_CTT);
	154	trip_temp &= 0x1FF;
	155	if (trip_temp) {
	156	/* Resolution of 1/2 degree C and an offset of -50C */
	157	ptd->crt_temp = trip_temp * 1000 / 2 - 50000;
	158	ptd->crt_trip_id = 0;
	159	++(*nr_trips);
	160	}
	161
	162	ptd->hot_trip_id = -1;
	163	trip_temp = readw(ptd->hw_base + WPT_PHL);
	164	trip_temp &= 0x1FF;
	165	if (trip_temp) {
	166	/* Resolution of 1/2 degree C and an offset of -50C */
	167	ptd->hot_temp = trip_temp * 1000 / 2 - 50000;
	168	ptd->hot_trip_id = *nr_trips;
	169	++(*nr_trips);
	170	}
	171
aed3f249 SP	172	pch_wpt_add_acpi_psv_trip(ptd, nr_trips);
aed3f249 SP	173
d0a12625 TD	174	return 0;
	175	}
	176
dfb22fc5	177	static int pch_wpt_get_temp(struct pch_thermal_device ptd, int temp)
d0a12625	178	{
23c973f5	179	u16 wpt_temp;
d0a12625	180
23c973f5	181	wpt_temp = WPT_TEMP_TSR & readw(ptd->hw_base + WPT_TEMP);
d0a12625 TD	182
	183	/* Resolution of 1/2 degree C and an offset of -50C */
	184	temp = (wpt_temp 1000 / 2 - 50000);
	185
	186	return 0;
	187	}
	188
176b1ec2 SP	189	static int pch_wpt_suspend(struct pch_thermal_device *ptd)
	190	{
	191	u8 tsel;
	192
	193	if (ptd->bios_enabled)
	194	return 0;
	195
	196	tsel = readb(ptd->hw_base + WPT_TSEL);
	197
	198	writeb(tsel & 0xFE, ptd->hw_base + WPT_TSEL);
	199
	200	return 0;
	201	}
	202
	203	static int pch_wpt_resume(struct pch_thermal_device *ptd)
	204	{
	205	u8 tsel;
	206
	207	if (ptd->bios_enabled)
	208	return 0;
	209
	210	tsel = readb(ptd->hw_base + WPT_TSEL);
	211
	212	writeb(tsel \| WPT_TSEL_ETS, ptd->hw_base + WPT_TSEL);
	213
	214	return 0;
	215	}
	216
d0a12625 TD	217	struct pch_dev_ops {
d0a12625 TD	218	int (hw_init)(struct pch_thermal_device ptd, int *nr_trips);
dfb22fc5	219	int (get_temp)(struct pch_thermal_device ptd, int *temp);
176b1ec2 SP	220	int (suspend)(struct pch_thermal_device ptd);
176b1ec2 SP	221	int (resume)(struct pch_thermal_device ptd);
d0a12625 TD	222	};
	223
	224
	225	/* dev ops for Wildcat Point */
a96bedf1	226	static const struct pch_dev_ops pch_dev_ops_wpt = {
d0a12625 TD	227	.hw_init = pch_wpt_init,
d0a12625 TD	228	.get_temp = pch_wpt_get_temp,
176b1ec2 SP	229	.suspend = pch_wpt_suspend,
176b1ec2 SP	230	.resume = pch_wpt_resume,
d0a12625 TD	231	};
d0a12625 TD	232
dfb22fc5	233	static int pch_thermal_get_temp(struct thermal_zone_device tzd, int temp)
d0a12625 TD	234	{
	235	struct pch_thermal_device *ptd = tzd->devdata;
	236
	237	return ptd->ops->get_temp(ptd, temp);
	238	}
	239
	240	static int pch_get_trip_type(struct thermal_zone_device *tzd, int trip,
	241	enum thermal_trip_type *type)
	242	{
	243	struct pch_thermal_device *ptd = tzd->devdata;
	244
	245	if (ptd->crt_trip_id == trip)
	246	*type = THERMAL_TRIP_CRITICAL;
	247	else if (ptd->hot_trip_id == trip)
	248	*type = THERMAL_TRIP_HOT;
aed3f249 SP	249	else if (ptd->psv_trip_id == trip)
aed3f249 SP	250	*type = THERMAL_TRIP_PASSIVE;
d0a12625 TD	251	else
	252	return -EINVAL;
	253
	254	return 0;
	255	}
	256
dfb22fc5	257	static int pch_get_trip_temp(struct thermal_zone_device tzd, int trip, int temp)
d0a12625 TD	258	{
	259	struct pch_thermal_device *ptd = tzd->devdata;
	260
	261	if (ptd->crt_trip_id == trip)
	262	*temp = ptd->crt_temp;
	263	else if (ptd->hot_trip_id == trip)
	264	*temp = ptd->hot_temp;
aed3f249 SP	265	else if (ptd->psv_trip_id == trip)
aed3f249 SP	266	*temp = ptd->psv_temp;
d0a12625 TD	267	else
	268	return -EINVAL;
	269
	270	return 0;
	271	}
	272
	273	static struct thermal_zone_device_ops tzd_ops = {
	274	.get_temp = pch_thermal_get_temp,
	275	.get_trip_type = pch_get_trip_type,
	276	.get_trip_temp = pch_get_trip_temp,
	277	};
	278
c6068a6e OH	279	enum board_ids {
	280	board_hsw,
	281	board_wpt,
	282	board_skl,
6ed5ed14	283	board_cnl,
c6068a6e OH	284	};
	285
	286	static const struct board_info {
	287	const char *name;
	288	const struct pch_dev_ops *ops;
	289	} board_info[] = {
	290	[board_hsw] = {
	291	.name = "pch_haswell",
	292	.ops = &pch_dev_ops_wpt,
	293	},
	294	[board_wpt] = {
	295	.name = "pch_wildcat_point",
	296	.ops = &pch_dev_ops_wpt,
	297	},
	298	[board_skl] = {
	299	.name = "pch_skylake",
	300	.ops = &pch_dev_ops_wpt,
	301	},
6ed5ed14 SP	302	[board_cnl] = {
	303	.name = "pch_cannonlake",
	304	.ops = &pch_dev_ops_wpt,
	305	},
c6068a6e	306	};
d0a12625 TD	307
	308	static int intel_pch_thermal_probe(struct pci_dev *pdev,
	309	const struct pci_device_id *id)
	310	{
c6068a6e OH	311	enum board_ids board_id = id->driver_data;
c6068a6e OH	312	const struct board_info *bi = &board_info[board_id];
d0a12625 TD	313	struct pch_thermal_device *ptd;
	314	int err;
	315	int nr_trips;
d0a12625 TD	316
	317	ptd = devm_kzalloc(&pdev->dev, sizeof(*ptd), GFP_KERNEL);
	318	if (!ptd)
	319	return -ENOMEM;
	320
c6068a6e	321	ptd->ops = bi->ops;
d0a12625 TD	322
	323	pci_set_drvdata(pdev, ptd);
	324	ptd->pdev = pdev;
	325
	326	err = pci_enable_device(pdev);
	327	if (err) {
	328	dev_err(&pdev->dev, "failed to enable pci device\n");
	329	return err;
	330	}
	331
	332	err = pci_request_regions(pdev, driver_name);
	333	if (err) {
	334	dev_err(&pdev->dev, "failed to request pci region\n");
	335	goto error_disable;
	336	}
	337
	338	ptd->hw_base = pci_ioremap_bar(pdev, 0);
	339	if (!ptd->hw_base) {
	340	err = -ENOMEM;
	341	dev_err(&pdev->dev, "failed to map mem base\n");
	342	goto error_release;
	343	}
	344
	345	err = ptd->ops->hw_init(ptd, &nr_trips);
	346	if (err)
	347	goto error_cleanup;
	348
c6068a6e	349	ptd->tzd = thermal_zone_device_register(bi->name, nr_trips, 0, ptd,
d0a12625 TD	350	&tzd_ops, NULL, 0, 0);
	351	if (IS_ERR(ptd->tzd)) {
	352	dev_err(&pdev->dev, "Failed to register thermal zone %s\n",
c6068a6e	353	bi->name);
d0a12625 TD	354	err = PTR_ERR(ptd->tzd);
	355	goto error_cleanup;
	356	}
	357
	358	return 0;
	359
	360	error_cleanup:
	361	iounmap(ptd->hw_base);
	362	error_release:
	363	pci_release_regions(pdev);
	364	error_disable:
	365	pci_disable_device(pdev);
	366	dev_err(&pdev->dev, "pci device failed to probe\n");
	367	return err;
	368	}
	369
	370	static void intel_pch_thermal_remove(struct pci_dev *pdev)
	371	{
	372	struct pch_thermal_device *ptd = pci_get_drvdata(pdev);
	373
	374	thermal_zone_device_unregister(ptd->tzd);
	375	iounmap(ptd->hw_base);
	376	pci_set_drvdata(pdev, NULL);
	377	pci_release_region(pdev, 0);
	378	pci_disable_device(pdev);
	379	}
	380
176b1ec2 SP	381	static int intel_pch_thermal_suspend(struct device *device)
	382	{
	383	struct pci_dev *pdev = to_pci_dev(device);
	384	struct pch_thermal_device *ptd = pci_get_drvdata(pdev);
	385
	386	return ptd->ops->suspend(ptd);
	387	}
	388
	389	static int intel_pch_thermal_resume(struct device *device)
	390	{
	391	struct pci_dev *pdev = to_pci_dev(device);
	392	struct pch_thermal_device *ptd = pci_get_drvdata(pdev);
	393
	394	return ptd->ops->resume(ptd);
	395	}
	396
9b877de3	397	static const struct pci_device_id intel_pch_thermal_id[] = {
c6068a6e OH	398	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCH_THERMAL_DID_HSW_1),
	399	.driver_data = board_hsw, },
	400	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCH_THERMAL_DID_HSW_2),
	401	.driver_data = board_hsw, },
	402	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCH_THERMAL_DID_WPT),
	403	.driver_data = board_wpt, },
	404	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCH_THERMAL_DID_SKL),
	405	.driver_data = board_skl, },
	406	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCH_THERMAL_DID_SKL_H),
	407	.driver_data = board_skl, },
6ed5ed14 SP	408	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCH_THERMAL_DID_CNL),
	409	.driver_data = board_cnl, },
	410	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCH_THERMAL_DID_CNL_H),
	411	.driver_data = board_cnl, },
d0a12625 TD	412	{ 0, },
	413	};
	414	MODULE_DEVICE_TABLE(pci, intel_pch_thermal_id);
	415
176b1ec2 SP	416	static const struct dev_pm_ops intel_pch_pm_ops = {
	417	.suspend = intel_pch_thermal_suspend,
	418	.resume = intel_pch_thermal_resume,
	419	};
	420
d0a12625 TD	421	static struct pci_driver intel_pch_thermal_driver = {
	422	.name = "intel_pch_thermal",
	423	.id_table = intel_pch_thermal_id,
	424	.probe = intel_pch_thermal_probe,
	425	.remove = intel_pch_thermal_remove,
176b1ec2	426	.driver.pm = &intel_pch_pm_ops,
d0a12625 TD	427	};
	428
	429	module_pci_driver(intel_pch_thermal_driver);
	430
	431	MODULE_LICENSE("GPL v2");
	432	MODULE_DESCRIPTION("Intel PCH Thermal driver");