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

// SPDX-License-Identifier: GPL-2.0-only
/* intel_pch_thermal.c - Intel PCH Thermal driver
 *
 * Copyright (c) 2015, Intel Corporation.
 *
 * Authors:
 *     Tushar Dave <tushar.n.dave@intel.com>
 */

#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
2025cf9e	1	// SPDX-License-Identifier: GPL-2.0-only
d0a12625 TD	2	/* intel_pch_thermal.c - Intel PCH Thermal driver
	3	*
	4	* Copyright (c) 2015, Intel Corporation.
	5	*
	6	* Authors:
	7	* Tushar Dave <tushar.n.dave@intel.com>
d0a12625 TD	8	*/
	9
	10	#include <linux/module.h>
	11	#include <linux/types.h>
	12	#include <linux/init.h>
	13	#include <linux/pci.h>
aed3f249	14	#include <linux/acpi.h>
d0a12625	15	#include <linux/thermal.h>
176b1ec2	16	#include <linux/pm.h>
d0a12625 TD	17
d0a12625 TD	18	/* Intel PCH thermal Device IDs */
33086a9a SP	19	#define PCH_THERMAL_DID_HSW_1 0x9C24 /* Haswell PCH */
33086a9a SP	20	#define PCH_THERMAL_DID_HSW_2 0x8C24 /* Haswell PCH */
d0a12625	21	#define PCH_THERMAL_DID_WPT 0x9CA4 /* Wildcat Point */
4cba7d23	22	#define PCH_THERMAL_DID_SKL 0x9D31 /* Skylake PCH */
c6068a6e	23	#define PCH_THERMAL_DID_SKL_H 0xA131 /* Skylake PCH 100 series */
6ed5ed14 SP	24	#define PCH_THERMAL_DID_CNL 0x9Df9 /* CNL PCH */
6ed5ed14 SP	25	#define PCH_THERMAL_DID_CNL_H 0xA379 /* CNL-H PCH */
d0a12625 TD	26
	27	/* Wildcat Point-LP PCH Thermal registers */
	28	#define WPT_TEMP 0x0000 /* Temperature */
	29	#define WPT_TSC 0x04 /* Thermal Sensor Control */
	30	#define WPT_TSS 0x06 /* Thermal Sensor Status */
	31	#define WPT_TSEL 0x08 /* Thermal Sensor Enable and Lock */
	32	#define WPT_TSREL 0x0A /* Thermal Sensor Report Enable and Lock */
	33	#define WPT_TSMIC 0x0C /* Thermal Sensor SMI Control */
	34	#define WPT_CTT 0x0010 /* Catastrophic Trip Point */
	35	#define WPT_TAHV 0x0014 /* Thermal Alert High Value */
	36	#define WPT_TALV 0x0018 /* Thermal Alert Low Value */
	37	#define WPT_TL 0x00000040 /* Throttle Value */
	38	#define WPT_PHL 0x0060 /* PCH Hot Level */
	39	#define WPT_PHLC 0x62 /* PHL Control */
	40	#define WPT_TAS 0x80 /* Thermal Alert Status */
	41	#define WPT_TSPIEN 0x82 /* PCI Interrupt Event Enables */
	42	#define WPT_TSGPEN 0x84 /* General Purpose Event Enables */
	43
	44	/* Wildcat Point-LP PCH Thermal Register bit definitions */
23c973f5	45	#define WPT_TEMP_TSR 0x01ff /* Temp TS Reading */
d0a12625 TD	46	#define WPT_TSC_CPDE 0x01 /* Catastrophic Power-Down Enable */
	47	#define WPT_TSS_TSDSS 0x10 /* Thermal Sensor Dynamic Shutdown Status */
	48	#define WPT_TSS_GPES 0x08 /* GPE status */
	49	#define WPT_TSEL_ETS 0x01 /* Enable TS */
	50	#define WPT_TSEL_PLDB 0x80 /* TSEL Policy Lock-Down Bit */
	51	#define WPT_TL_TOL 0x000001FF /* T0 Level */
	52	#define WPT_TL_T1L 0x1ff00000 /* T1 Level */
	53	#define WPT_TL_TTEN 0x20000000 /* TT Enable */
	54
	55	static char driver_name[] = "Intel PCH thermal driver";
	56
	57	struct pch_thermal_device {
	58	void __iomem *hw_base;
	59	const struct pch_dev_ops *ops;
	60	struct pci_dev *pdev;
	61	struct thermal_zone_device *tzd;
	62	int crt_trip_id;
	63	unsigned long crt_temp;
	64	int hot_trip_id;
	65	unsigned long hot_temp;
aed3f249 SP	66	int psv_trip_id;
aed3f249 SP	67	unsigned long psv_temp;
176b1ec2	68	bool bios_enabled;
d0a12625 TD	69	};
d0a12625 TD	70
aed3f249 SP	71	#ifdef CONFIG_ACPI
	72
	73	/*
	74	* On some platforms, there is a companion ACPI device, which adds
	75	* passive trip temperature using _PSV method. There is no specific
	76	* passive temperature setting in MMIO interface of this PCI device.
	77	*/
	78	static void pch_wpt_add_acpi_psv_trip(struct pch_thermal_device *ptd,
	79	int *nr_trips)
	80	{
	81	struct acpi_device *adev;
	82
	83	ptd->psv_trip_id = -1;
	84
	85	adev = ACPI_COMPANION(&ptd->pdev->dev);
	86	if (adev) {
	87	unsigned long long r;
	88	acpi_status status;
	89
	90	status = acpi_evaluate_integer(adev->handle, "_PSV", NULL,
	91	&r);
	92	if (ACPI_SUCCESS(status)) {
	93	unsigned long trip_temp;
	94
	95	trip_temp = DECI_KELVIN_TO_MILLICELSIUS(r);
	96	if (trip_temp) {
	97	ptd->psv_temp = trip_temp;
	98	ptd->psv_trip_id = *nr_trips;
	99	++(*nr_trips);
	100	}
	101	}
	102	}
	103	}
	104	#else
	105	static void pch_wpt_add_acpi_psv_trip(struct pch_thermal_device *ptd,
	106	int *nr_trips)
	107	{
	108	ptd->psv_trip_id = -1;
	109
	110	}
	111	#endif
	112
d0a12625 TD	113	static int pch_wpt_init(struct pch_thermal_device ptd, int nr_trips)
	114	{
	115	u8 tsel;
	116	u16 trip_temp;
	117
	118	*nr_trips = 0;
	119
	120	/* Check if BIOS has already enabled thermal sensor */
595536e0	121	if (WPT_TSEL_ETS & readb(ptd->hw_base + WPT_TSEL)) {
176b1ec2	122	ptd->bios_enabled = true;
d0a12625	123	goto read_trips;
176b1ec2	124	}
d0a12625 TD	125
	126	tsel = readb(ptd->hw_base + WPT_TSEL);
	127	/*
	128	* When TSEL's Policy Lock-Down bit is 1, TSEL become RO.
	129	* If so, thermal sensor cannot enable. Bail out.
	130	*/
	131	if (tsel & WPT_TSEL_PLDB) {
	132	dev_err(&ptd->pdev->dev, "Sensor can't be enabled\n");
	133	return -ENODEV;
	134	}
	135
	136	writeb(tsel\|WPT_TSEL_ETS, ptd->hw_base + WPT_TSEL);
595536e0	137	if (!(WPT_TSEL_ETS & readb(ptd->hw_base + WPT_TSEL))) {
d0a12625 TD	138	dev_err(&ptd->pdev->dev, "Sensor can't be enabled\n");
	139	return -ENODEV;
	140	}
	141
	142	read_trips:
	143	ptd->crt_trip_id = -1;
	144	trip_temp = readw(ptd->hw_base + WPT_CTT);
	145	trip_temp &= 0x1FF;
	146	if (trip_temp) {
	147	/* Resolution of 1/2 degree C and an offset of -50C */
	148	ptd->crt_temp = trip_temp * 1000 / 2 - 50000;
	149	ptd->crt_trip_id = 0;
	150	++(*nr_trips);
	151	}
	152
	153	ptd->hot_trip_id = -1;
	154	trip_temp = readw(ptd->hw_base + WPT_PHL);
	155	trip_temp &= 0x1FF;
	156	if (trip_temp) {
	157	/* Resolution of 1/2 degree C and an offset of -50C */
	158	ptd->hot_temp = trip_temp * 1000 / 2 - 50000;
	159	ptd->hot_trip_id = *nr_trips;
	160	++(*nr_trips);
	161	}
	162
aed3f249 SP	163	pch_wpt_add_acpi_psv_trip(ptd, nr_trips);
aed3f249 SP	164
d0a12625 TD	165	return 0;
	166	}
	167
dfb22fc5	168	static int pch_wpt_get_temp(struct pch_thermal_device ptd, int temp)
d0a12625	169	{
23c973f5	170	u16 wpt_temp;
d0a12625	171
23c973f5	172	wpt_temp = WPT_TEMP_TSR & readw(ptd->hw_base + WPT_TEMP);
d0a12625 TD	173
	174	/* Resolution of 1/2 degree C and an offset of -50C */
	175	temp = (wpt_temp 1000 / 2 - 50000);
	176
	177	return 0;
	178	}
	179
176b1ec2 SP	180	static int pch_wpt_suspend(struct pch_thermal_device *ptd)
	181	{
	182	u8 tsel;
	183
	184	if (ptd->bios_enabled)
	185	return 0;
	186
	187	tsel = readb(ptd->hw_base + WPT_TSEL);
	188
	189	writeb(tsel & 0xFE, ptd->hw_base + WPT_TSEL);
	190
	191	return 0;
	192	}
	193
	194	static int pch_wpt_resume(struct pch_thermal_device *ptd)
	195	{
	196	u8 tsel;
	197
	198	if (ptd->bios_enabled)
	199	return 0;
	200
	201	tsel = readb(ptd->hw_base + WPT_TSEL);
	202
	203	writeb(tsel \| WPT_TSEL_ETS, ptd->hw_base + WPT_TSEL);
	204
	205	return 0;
	206	}
	207
d0a12625 TD	208	struct pch_dev_ops {
d0a12625 TD	209	int (hw_init)(struct pch_thermal_device ptd, int *nr_trips);
dfb22fc5	210	int (get_temp)(struct pch_thermal_device ptd, int *temp);
176b1ec2 SP	211	int (suspend)(struct pch_thermal_device ptd);
176b1ec2 SP	212	int (resume)(struct pch_thermal_device ptd);
d0a12625 TD	213	};
	214
	215
	216	/* dev ops for Wildcat Point */
a96bedf1	217	static const struct pch_dev_ops pch_dev_ops_wpt = {
d0a12625 TD	218	.hw_init = pch_wpt_init,
d0a12625 TD	219	.get_temp = pch_wpt_get_temp,
176b1ec2 SP	220	.suspend = pch_wpt_suspend,
176b1ec2 SP	221	.resume = pch_wpt_resume,
d0a12625 TD	222	};
d0a12625 TD	223
dfb22fc5	224	static int pch_thermal_get_temp(struct thermal_zone_device tzd, int temp)
d0a12625 TD	225	{
	226	struct pch_thermal_device *ptd = tzd->devdata;
	227
	228	return ptd->ops->get_temp(ptd, temp);
	229	}
	230
	231	static int pch_get_trip_type(struct thermal_zone_device *tzd, int trip,
	232	enum thermal_trip_type *type)
	233	{
	234	struct pch_thermal_device *ptd = tzd->devdata;
	235
	236	if (ptd->crt_trip_id == trip)
	237	*type = THERMAL_TRIP_CRITICAL;
	238	else if (ptd->hot_trip_id == trip)
	239	*type = THERMAL_TRIP_HOT;
aed3f249 SP	240	else if (ptd->psv_trip_id == trip)
aed3f249 SP	241	*type = THERMAL_TRIP_PASSIVE;
d0a12625 TD	242	else
	243	return -EINVAL;
	244
	245	return 0;
	246	}
	247
dfb22fc5	248	static int pch_get_trip_temp(struct thermal_zone_device tzd, int trip, int temp)
d0a12625 TD	249	{
	250	struct pch_thermal_device *ptd = tzd->devdata;
	251
	252	if (ptd->crt_trip_id == trip)
	253	*temp = ptd->crt_temp;
	254	else if (ptd->hot_trip_id == trip)
	255	*temp = ptd->hot_temp;
aed3f249 SP	256	else if (ptd->psv_trip_id == trip)
aed3f249 SP	257	*temp = ptd->psv_temp;
d0a12625 TD	258	else
	259	return -EINVAL;
	260
	261	return 0;
	262	}
	263
	264	static struct thermal_zone_device_ops tzd_ops = {
	265	.get_temp = pch_thermal_get_temp,
	266	.get_trip_type = pch_get_trip_type,
	267	.get_trip_temp = pch_get_trip_temp,
	268	};
	269
c6068a6e OH	270	enum board_ids {
	271	board_hsw,
	272	board_wpt,
	273	board_skl,
6ed5ed14	274	board_cnl,
c6068a6e OH	275	};
	276
	277	static const struct board_info {
	278	const char *name;
	279	const struct pch_dev_ops *ops;
	280	} board_info[] = {
	281	[board_hsw] = {
	282	.name = "pch_haswell",
	283	.ops = &pch_dev_ops_wpt,
	284	},
	285	[board_wpt] = {
	286	.name = "pch_wildcat_point",
	287	.ops = &pch_dev_ops_wpt,
	288	},
	289	[board_skl] = {
	290	.name = "pch_skylake",
	291	.ops = &pch_dev_ops_wpt,
	292	},
6ed5ed14 SP	293	[board_cnl] = {
	294	.name = "pch_cannonlake",
	295	.ops = &pch_dev_ops_wpt,
	296	},
c6068a6e	297	};
d0a12625 TD	298
	299	static int intel_pch_thermal_probe(struct pci_dev *pdev,
	300	const struct pci_device_id *id)
	301	{
c6068a6e OH	302	enum board_ids board_id = id->driver_data;
c6068a6e OH	303	const struct board_info *bi = &board_info[board_id];
d0a12625 TD	304	struct pch_thermal_device *ptd;
	305	int err;
	306	int nr_trips;
d0a12625 TD	307
	308	ptd = devm_kzalloc(&pdev->dev, sizeof(*ptd), GFP_KERNEL);
	309	if (!ptd)
	310	return -ENOMEM;
	311
c6068a6e	312	ptd->ops = bi->ops;
d0a12625 TD	313
	314	pci_set_drvdata(pdev, ptd);
	315	ptd->pdev = pdev;
	316
	317	err = pci_enable_device(pdev);
	318	if (err) {
	319	dev_err(&pdev->dev, "failed to enable pci device\n");
	320	return err;
	321	}
	322
	323	err = pci_request_regions(pdev, driver_name);
	324	if (err) {
	325	dev_err(&pdev->dev, "failed to request pci region\n");
	326	goto error_disable;
	327	}
	328
	329	ptd->hw_base = pci_ioremap_bar(pdev, 0);
	330	if (!ptd->hw_base) {
	331	err = -ENOMEM;
	332	dev_err(&pdev->dev, "failed to map mem base\n");
	333	goto error_release;
	334	}
	335
	336	err = ptd->ops->hw_init(ptd, &nr_trips);
	337	if (err)
	338	goto error_cleanup;
	339
c6068a6e	340	ptd->tzd = thermal_zone_device_register(bi->name, nr_trips, 0, ptd,
d0a12625 TD	341	&tzd_ops, NULL, 0, 0);
	342	if (IS_ERR(ptd->tzd)) {
	343	dev_err(&pdev->dev, "Failed to register thermal zone %s\n",
c6068a6e	344	bi->name);
d0a12625 TD	345	err = PTR_ERR(ptd->tzd);
	346	goto error_cleanup;
	347	}
	348
	349	return 0;
	350
	351	error_cleanup:
	352	iounmap(ptd->hw_base);
	353	error_release:
	354	pci_release_regions(pdev);
	355	error_disable:
	356	pci_disable_device(pdev);
	357	dev_err(&pdev->dev, "pci device failed to probe\n");
	358	return err;
	359	}
	360
	361	static void intel_pch_thermal_remove(struct pci_dev *pdev)
	362	{
	363	struct pch_thermal_device *ptd = pci_get_drvdata(pdev);
	364
	365	thermal_zone_device_unregister(ptd->tzd);
	366	iounmap(ptd->hw_base);
	367	pci_set_drvdata(pdev, NULL);
	368	pci_release_region(pdev, 0);
	369	pci_disable_device(pdev);
	370	}
	371
176b1ec2 SP	372	static int intel_pch_thermal_suspend(struct device *device)
	373	{
	374	struct pci_dev *pdev = to_pci_dev(device);
	375	struct pch_thermal_device *ptd = pci_get_drvdata(pdev);
	376
	377	return ptd->ops->suspend(ptd);
	378	}
	379
	380	static int intel_pch_thermal_resume(struct device *device)
	381	{
	382	struct pci_dev *pdev = to_pci_dev(device);
	383	struct pch_thermal_device *ptd = pci_get_drvdata(pdev);
	384
	385	return ptd->ops->resume(ptd);
	386	}
	387
9b877de3	388	static const struct pci_device_id intel_pch_thermal_id[] = {
c6068a6e OH	389	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCH_THERMAL_DID_HSW_1),
	390	.driver_data = board_hsw, },
	391	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCH_THERMAL_DID_HSW_2),
	392	.driver_data = board_hsw, },
	393	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCH_THERMAL_DID_WPT),
	394	.driver_data = board_wpt, },
	395	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCH_THERMAL_DID_SKL),
	396	.driver_data = board_skl, },
	397	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCH_THERMAL_DID_SKL_H),
	398	.driver_data = board_skl, },
6ed5ed14 SP	399	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCH_THERMAL_DID_CNL),
	400	.driver_data = board_cnl, },
	401	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCH_THERMAL_DID_CNL_H),
	402	.driver_data = board_cnl, },
d0a12625 TD	403	{ 0, },
	404	};
	405	MODULE_DEVICE_TABLE(pci, intel_pch_thermal_id);
	406
176b1ec2 SP	407	static const struct dev_pm_ops intel_pch_pm_ops = {
	408	.suspend = intel_pch_thermal_suspend,
	409	.resume = intel_pch_thermal_resume,
	410	};
	411
d0a12625 TD	412	static struct pci_driver intel_pch_thermal_driver = {
	413	.name = "intel_pch_thermal",
	414	.id_table = intel_pch_thermal_id,
	415	.probe = intel_pch_thermal_probe,
	416	.remove = intel_pch_thermal_remove,
176b1ec2	417	.driver.pm = &intel_pch_pm_ops,
d0a12625 TD	418	};
	419
	420	module_pci_driver(intel_pch_thermal_driver);
	421
	422	MODULE_LICENSE("GPL v2");
	423	MODULE_DESCRIPTION("Intel PCH Thermal driver");