12025cf9eSThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only
23e8c4d31SAmit Kucheria /* intel_pch_thermal.c - Intel PCH Thermal driver
33e8c4d31SAmit Kucheria *
43e8c4d31SAmit Kucheria * Copyright (c) 2015, Intel Corporation.
53e8c4d31SAmit Kucheria *
63e8c4d31SAmit Kucheria * Authors:
73e8c4d31SAmit Kucheria * Tushar Dave <tushar.n.dave@intel.com>
83e8c4d31SAmit Kucheria */
93e8c4d31SAmit Kucheria
10ef63b043SSumeet Pawnikar #include <linux/acpi.h>
11ef63b043SSumeet Pawnikar #include <linux/delay.h>
123e8c4d31SAmit Kucheria #include <linux/module.h>
133e8c4d31SAmit Kucheria #include <linux/init.h>
143e8c4d31SAmit Kucheria #include <linux/pci.h>
153e8c4d31SAmit Kucheria #include <linux/pm.h>
16ef63b043SSumeet Pawnikar #include <linux/suspend.h>
17ef63b043SSumeet Pawnikar #include <linux/thermal.h>
18ef63b043SSumeet Pawnikar #include <linux/types.h>
19ef63b043SSumeet Pawnikar #include <linux/units.h>
203e8c4d31SAmit Kucheria
213e8c4d31SAmit Kucheria /* Intel PCH thermal Device IDs */
223e8c4d31SAmit Kucheria #define PCH_THERMAL_DID_HSW_1 0x9C24 /* Haswell PCH */
233e8c4d31SAmit Kucheria #define PCH_THERMAL_DID_HSW_2 0x8C24 /* Haswell PCH */
243e8c4d31SAmit Kucheria #define PCH_THERMAL_DID_WPT 0x9CA4 /* Wildcat Point */
253e8c4d31SAmit Kucheria #define PCH_THERMAL_DID_SKL 0x9D31 /* Skylake PCH */
263e8c4d31SAmit Kucheria #define PCH_THERMAL_DID_SKL_H 0xA131 /* Skylake PCH 100 series */
273e8c4d31SAmit Kucheria #define PCH_THERMAL_DID_CNL 0x9Df9 /* CNL PCH */
283e8c4d31SAmit Kucheria #define PCH_THERMAL_DID_CNL_H 0xA379 /* CNL-H PCH */
29c569e805SSumeet Pawnikar #define PCH_THERMAL_DID_CNL_LP 0x02F9 /* CNL-LP PCH */
3035709c4eSGayatri Kammela #define PCH_THERMAL_DID_CML_H 0X06F9 /* CML-H PCH */
31e78acf7eSAndres Freund #define PCH_THERMAL_DID_LWB 0xA1B1 /* Lewisburg PCH */
3240dc1929STim Zimmermann #define PCH_THERMAL_DID_WBG 0x8D24 /* Wellsburg PCH */
333e8c4d31SAmit Kucheria
343e8c4d31SAmit Kucheria /* Wildcat Point-LP PCH Thermal registers */
353e8c4d31SAmit Kucheria #define WPT_TEMP 0x0000 /* Temperature */
363e8c4d31SAmit Kucheria #define WPT_TSC 0x04 /* Thermal Sensor Control */
373e8c4d31SAmit Kucheria #define WPT_TSS 0x06 /* Thermal Sensor Status */
383e8c4d31SAmit Kucheria #define WPT_TSEL 0x08 /* Thermal Sensor Enable and Lock */
393e8c4d31SAmit Kucheria #define WPT_TSREL 0x0A /* Thermal Sensor Report Enable and Lock */
403e8c4d31SAmit Kucheria #define WPT_TSMIC 0x0C /* Thermal Sensor SMI Control */
413e8c4d31SAmit Kucheria #define WPT_CTT 0x0010 /* Catastrophic Trip Point */
42ef63b043SSumeet Pawnikar #define WPT_TSPM 0x001C /* Thermal Sensor Power Management */
433e8c4d31SAmit Kucheria #define WPT_TAHV 0x0014 /* Thermal Alert High Value */
443e8c4d31SAmit Kucheria #define WPT_TALV 0x0018 /* Thermal Alert Low Value */
453e8c4d31SAmit Kucheria #define WPT_TL 0x00000040 /* Throttle Value */
463e8c4d31SAmit Kucheria #define WPT_PHL 0x0060 /* PCH Hot Level */
473e8c4d31SAmit Kucheria #define WPT_PHLC 0x62 /* PHL Control */
483e8c4d31SAmit Kucheria #define WPT_TAS 0x80 /* Thermal Alert Status */
493e8c4d31SAmit Kucheria #define WPT_TSPIEN 0x82 /* PCI Interrupt Event Enables */
503e8c4d31SAmit Kucheria #define WPT_TSGPEN 0x84 /* General Purpose Event Enables */
513e8c4d31SAmit Kucheria
523e8c4d31SAmit Kucheria /* Wildcat Point-LP PCH Thermal Register bit definitions */
533e8c4d31SAmit Kucheria #define WPT_TEMP_TSR 0x01ff /* Temp TS Reading */
543e8c4d31SAmit Kucheria #define WPT_TSC_CPDE 0x01 /* Catastrophic Power-Down Enable */
553e8c4d31SAmit Kucheria #define WPT_TSS_TSDSS 0x10 /* Thermal Sensor Dynamic Shutdown Status */
563e8c4d31SAmit Kucheria #define WPT_TSS_GPES 0x08 /* GPE status */
573e8c4d31SAmit Kucheria #define WPT_TSEL_ETS 0x01 /* Enable TS */
583e8c4d31SAmit Kucheria #define WPT_TSEL_PLDB 0x80 /* TSEL Policy Lock-Down Bit */
593e8c4d31SAmit Kucheria #define WPT_TL_TOL 0x000001FF /* T0 Level */
603e8c4d31SAmit Kucheria #define WPT_TL_T1L 0x1ff00000 /* T1 Level */
613e8c4d31SAmit Kucheria #define WPT_TL_TTEN 0x20000000 /* TT Enable */
623e8c4d31SAmit Kucheria
63ef63b043SSumeet Pawnikar /* Resolution of 1/2 degree C and an offset of -50C */
64ef63b043SSumeet Pawnikar #define PCH_TEMP_OFFSET (-50)
65ef63b043SSumeet Pawnikar #define GET_WPT_TEMP(x) ((x) * MILLIDEGREE_PER_DEGREE / 2 + WPT_TEMP_OFFSET)
66ef63b043SSumeet Pawnikar #define WPT_TEMP_OFFSET (PCH_TEMP_OFFSET * MILLIDEGREE_PER_DEGREE)
67ef63b043SSumeet Pawnikar #define GET_PCH_TEMP(x) (((x) / 2) + PCH_TEMP_OFFSET)
68ef63b043SSumeet Pawnikar
69fee19c69SDaniel Lezcano #define PCH_MAX_TRIPS 3 /* critical, hot, passive */
70fee19c69SDaniel Lezcano
71ef63b043SSumeet Pawnikar /* Amount of time for each cooling delay, 100ms by default for now */
72ef63b043SSumeet Pawnikar static unsigned int delay_timeout = 100;
73ef63b043SSumeet Pawnikar module_param(delay_timeout, int, 0644);
74ef63b043SSumeet Pawnikar MODULE_PARM_DESC(delay_timeout, "amount of time delay for each iteration.");
75ef63b043SSumeet Pawnikar
7692923028SZhang Rui /* Number of iterations for cooling delay, 600 counts by default for now */
7792923028SZhang Rui static unsigned int delay_cnt = 600;
78ef63b043SSumeet Pawnikar module_param(delay_cnt, int, 0644);
79ef63b043SSumeet Pawnikar MODULE_PARM_DESC(delay_cnt, "total number of iterations for time delay.");
80ef63b043SSumeet Pawnikar
813e8c4d31SAmit Kucheria static char driver_name[] = "Intel PCH thermal driver";
823e8c4d31SAmit Kucheria
833e8c4d31SAmit Kucheria struct pch_thermal_device {
843e8c4d31SAmit Kucheria void __iomem *hw_base;
853e8c4d31SAmit Kucheria struct pci_dev *pdev;
863e8c4d31SAmit Kucheria struct thermal_zone_device *tzd;
87fee19c69SDaniel Lezcano struct thermal_trip trips[PCH_MAX_TRIPS];
883e8c4d31SAmit Kucheria bool bios_enabled;
893e8c4d31SAmit Kucheria };
903e8c4d31SAmit Kucheria
913e8c4d31SAmit Kucheria #ifdef CONFIG_ACPI
923e8c4d31SAmit Kucheria /*
933e8c4d31SAmit Kucheria * On some platforms, there is a companion ACPI device, which adds
943e8c4d31SAmit Kucheria * passive trip temperature using _PSV method. There is no specific
953e8c4d31SAmit Kucheria * passive temperature setting in MMIO interface of this PCI device.
963e8c4d31SAmit Kucheria */
pch_wpt_add_acpi_psv_trip(struct pch_thermal_device * ptd,int trip)972cee7356SRafael J. Wysocki static int pch_wpt_add_acpi_psv_trip(struct pch_thermal_device *ptd, int trip)
983e8c4d31SAmit Kucheria {
993e8c4d31SAmit Kucheria struct acpi_device *adev;
100dd3b3d16SRafael J. Wysocki int temp;
1013e8c4d31SAmit Kucheria
1023e8c4d31SAmit Kucheria adev = ACPI_COMPANION(&ptd->pdev->dev);
103fee19c69SDaniel Lezcano if (!adev)
1042cee7356SRafael J. Wysocki return 0;
1053e8c4d31SAmit Kucheria
106dd3b3d16SRafael J. Wysocki if (thermal_acpi_passive_trip_temp(adev, &temp) || temp <= 0)
1072cee7356SRafael J. Wysocki return 0;
1083e8c4d31SAmit Kucheria
1092cee7356SRafael J. Wysocki ptd->trips[trip].type = THERMAL_TRIP_PASSIVE;
1102cee7356SRafael J. Wysocki ptd->trips[trip].temperature = temp;
1112cee7356SRafael J. Wysocki return 1;
1123e8c4d31SAmit Kucheria }
1133e8c4d31SAmit Kucheria #else
pch_wpt_add_acpi_psv_trip(struct pch_thermal_device * ptd,int trip)1142cee7356SRafael J. Wysocki static int pch_wpt_add_acpi_psv_trip(struct pch_thermal_device *ptd, int trip)
1153e8c4d31SAmit Kucheria {
1162cee7356SRafael J. Wysocki return 0;
1173e8c4d31SAmit Kucheria }
1183e8c4d31SAmit Kucheria #endif
1193e8c4d31SAmit Kucheria
pch_thermal_get_temp(struct thermal_zone_device * tzd,int * temp)1203e8c4d31SAmit Kucheria static int pch_thermal_get_temp(struct thermal_zone_device *tzd, int *temp)
1213e8c4d31SAmit Kucheria {
1225f68d078SDaniel Lezcano struct pch_thermal_device *ptd = thermal_zone_device_priv(tzd);
1233e8c4d31SAmit Kucheria
12435c87f94SRafael J. Wysocki *temp = GET_WPT_TEMP(WPT_TEMP_TSR & readw(ptd->hw_base + WPT_TEMP));
125558718f4SRafael J. Wysocki return 0;
1263e8c4d31SAmit Kucheria }
1273e8c4d31SAmit Kucheria
pch_critical(struct thermal_zone_device * tzd)12803671968SKai-Heng Feng static void pch_critical(struct thermal_zone_device *tzd)
12903671968SKai-Heng Feng {
130*ba7894beSDaniel Lezcano dev_dbg(thermal_zone_device(tzd), "%s: critical temperature reached\n",
131*ba7894beSDaniel Lezcano thermal_zone_device_type(tzd));
13203671968SKai-Heng Feng }
13303671968SKai-Heng Feng
1343e8c4d31SAmit Kucheria static struct thermal_zone_device_ops tzd_ops = {
1353e8c4d31SAmit Kucheria .get_temp = pch_thermal_get_temp,
13603671968SKai-Heng Feng .critical = pch_critical,
1373e8c4d31SAmit Kucheria };
1383e8c4d31SAmit Kucheria
139ae98e57aSRafael J. Wysocki enum pch_board_ids {
140ae98e57aSRafael J. Wysocki PCH_BOARD_HSW = 0,
141ae98e57aSRafael J. Wysocki PCH_BOARD_WPT,
142ae98e57aSRafael J. Wysocki PCH_BOARD_SKL,
143ae98e57aSRafael J. Wysocki PCH_BOARD_CNL,
144ae98e57aSRafael J. Wysocki PCH_BOARD_CML,
145ae98e57aSRafael J. Wysocki PCH_BOARD_LWB,
146ae98e57aSRafael J. Wysocki PCH_BOARD_WBG,
1473e8c4d31SAmit Kucheria };
1483e8c4d31SAmit Kucheria
1492153a87fSRafael J. Wysocki static const char *board_names[] = {
1502153a87fSRafael J. Wysocki [PCH_BOARD_HSW] = "pch_haswell",
1512153a87fSRafael J. Wysocki [PCH_BOARD_WPT] = "pch_wildcat_point",
1522153a87fSRafael J. Wysocki [PCH_BOARD_SKL] = "pch_skylake",
1532153a87fSRafael J. Wysocki [PCH_BOARD_CNL] = "pch_cannonlake",
1542153a87fSRafael J. Wysocki [PCH_BOARD_CML] = "pch_cometlake",
1552153a87fSRafael J. Wysocki [PCH_BOARD_LWB] = "pch_lewisburg",
1562153a87fSRafael J. Wysocki [PCH_BOARD_WBG] = "pch_wellsburg",
1573e8c4d31SAmit Kucheria };
1583e8c4d31SAmit Kucheria
intel_pch_thermal_probe(struct pci_dev * pdev,const struct pci_device_id * id)1593e8c4d31SAmit Kucheria static int intel_pch_thermal_probe(struct pci_dev *pdev,
1603e8c4d31SAmit Kucheria const struct pci_device_id *id)
1613e8c4d31SAmit Kucheria {
162ae98e57aSRafael J. Wysocki enum pch_board_ids board_id = id->driver_data;
1633e8c4d31SAmit Kucheria struct pch_thermal_device *ptd;
16435c87f94SRafael J. Wysocki int nr_trips = 0;
16535c87f94SRafael J. Wysocki u16 trip_temp;
16635c87f94SRafael J. Wysocki u8 tsel;
1673e8c4d31SAmit Kucheria int err;
1683e8c4d31SAmit Kucheria
1693e8c4d31SAmit Kucheria ptd = devm_kzalloc(&pdev->dev, sizeof(*ptd), GFP_KERNEL);
1703e8c4d31SAmit Kucheria if (!ptd)
1713e8c4d31SAmit Kucheria return -ENOMEM;
1723e8c4d31SAmit Kucheria
1733e8c4d31SAmit Kucheria pci_set_drvdata(pdev, ptd);
1743e8c4d31SAmit Kucheria ptd->pdev = pdev;
1753e8c4d31SAmit Kucheria
1763e8c4d31SAmit Kucheria err = pci_enable_device(pdev);
1773e8c4d31SAmit Kucheria if (err) {
1783e8c4d31SAmit Kucheria dev_err(&pdev->dev, "failed to enable pci device\n");
1793e8c4d31SAmit Kucheria return err;
1803e8c4d31SAmit Kucheria }
1813e8c4d31SAmit Kucheria
1823e8c4d31SAmit Kucheria err = pci_request_regions(pdev, driver_name);
1833e8c4d31SAmit Kucheria if (err) {
1843e8c4d31SAmit Kucheria dev_err(&pdev->dev, "failed to request pci region\n");
1853e8c4d31SAmit Kucheria goto error_disable;
1863e8c4d31SAmit Kucheria }
1873e8c4d31SAmit Kucheria
1883e8c4d31SAmit Kucheria ptd->hw_base = pci_ioremap_bar(pdev, 0);
1893e8c4d31SAmit Kucheria if (!ptd->hw_base) {
1903e8c4d31SAmit Kucheria err = -ENOMEM;
1913e8c4d31SAmit Kucheria dev_err(&pdev->dev, "failed to map mem base\n");
1923e8c4d31SAmit Kucheria goto error_release;
1933e8c4d31SAmit Kucheria }
1943e8c4d31SAmit Kucheria
19535c87f94SRafael J. Wysocki /* Check if BIOS has already enabled thermal sensor */
19635c87f94SRafael J. Wysocki if (WPT_TSEL_ETS & readb(ptd->hw_base + WPT_TSEL)) {
19735c87f94SRafael J. Wysocki ptd->bios_enabled = true;
19835c87f94SRafael J. Wysocki goto read_trips;
19935c87f94SRafael J. Wysocki }
20035c87f94SRafael J. Wysocki
20135c87f94SRafael J. Wysocki tsel = readb(ptd->hw_base + WPT_TSEL);
20235c87f94SRafael J. Wysocki /*
20335c87f94SRafael J. Wysocki * When TSEL's Policy Lock-Down bit is 1, TSEL become RO.
20435c87f94SRafael J. Wysocki * If so, thermal sensor cannot enable. Bail out.
20535c87f94SRafael J. Wysocki */
20635c87f94SRafael J. Wysocki if (tsel & WPT_TSEL_PLDB) {
20735c87f94SRafael J. Wysocki dev_err(&ptd->pdev->dev, "Sensor can't be enabled\n");
20835c87f94SRafael J. Wysocki err = -ENODEV;
2093e8c4d31SAmit Kucheria goto error_cleanup;
210558718f4SRafael J. Wysocki }
2113e8c4d31SAmit Kucheria
21235c87f94SRafael J. Wysocki writeb(tsel|WPT_TSEL_ETS, ptd->hw_base + WPT_TSEL);
21335c87f94SRafael J. Wysocki if (!(WPT_TSEL_ETS & readb(ptd->hw_base + WPT_TSEL))) {
21435c87f94SRafael J. Wysocki dev_err(&ptd->pdev->dev, "Sensor can't be enabled\n");
21535c87f94SRafael J. Wysocki err = -ENODEV;
21635c87f94SRafael J. Wysocki goto error_cleanup;
21735c87f94SRafael J. Wysocki }
21835c87f94SRafael J. Wysocki
21935c87f94SRafael J. Wysocki read_trips:
22035c87f94SRafael J. Wysocki trip_temp = readw(ptd->hw_base + WPT_CTT);
22135c87f94SRafael J. Wysocki trip_temp &= 0x1FF;
22235c87f94SRafael J. Wysocki if (trip_temp) {
22335c87f94SRafael J. Wysocki ptd->trips[nr_trips].temperature = GET_WPT_TEMP(trip_temp);
22435c87f94SRafael J. Wysocki ptd->trips[nr_trips++].type = THERMAL_TRIP_CRITICAL;
22535c87f94SRafael J. Wysocki }
22635c87f94SRafael J. Wysocki
22735c87f94SRafael J. Wysocki trip_temp = readw(ptd->hw_base + WPT_PHL);
22835c87f94SRafael J. Wysocki trip_temp &= 0x1FF;
22935c87f94SRafael J. Wysocki if (trip_temp) {
23035c87f94SRafael J. Wysocki ptd->trips[nr_trips].temperature = GET_WPT_TEMP(trip_temp);
23135c87f94SRafael J. Wysocki ptd->trips[nr_trips++].type = THERMAL_TRIP_HOT;
23235c87f94SRafael J. Wysocki }
23335c87f94SRafael J. Wysocki
23435c87f94SRafael J. Wysocki nr_trips += pch_wpt_add_acpi_psv_trip(ptd, nr_trips);
23535c87f94SRafael J. Wysocki
2362153a87fSRafael J. Wysocki ptd->tzd = thermal_zone_device_register_with_trips(board_names[board_id],
2372153a87fSRafael J. Wysocki ptd->trips, nr_trips,
2382153a87fSRafael J. Wysocki 0, ptd, &tzd_ops,
2392153a87fSRafael J. Wysocki NULL, 0, 0);
2403e8c4d31SAmit Kucheria if (IS_ERR(ptd->tzd)) {
2413e8c4d31SAmit Kucheria dev_err(&pdev->dev, "Failed to register thermal zone %s\n",
2422153a87fSRafael J. Wysocki board_names[board_id]);
2433e8c4d31SAmit Kucheria err = PTR_ERR(ptd->tzd);
2443e8c4d31SAmit Kucheria goto error_cleanup;
2453e8c4d31SAmit Kucheria }
246bbcf90c0SAndrzej Pietrasiewicz err = thermal_zone_device_enable(ptd->tzd);
247bbcf90c0SAndrzej Pietrasiewicz if (err)
248bbcf90c0SAndrzej Pietrasiewicz goto err_unregister;
2493e8c4d31SAmit Kucheria
2503e8c4d31SAmit Kucheria return 0;
2513e8c4d31SAmit Kucheria
252bbcf90c0SAndrzej Pietrasiewicz err_unregister:
253bbcf90c0SAndrzej Pietrasiewicz thermal_zone_device_unregister(ptd->tzd);
2543e8c4d31SAmit Kucheria error_cleanup:
2553e8c4d31SAmit Kucheria iounmap(ptd->hw_base);
2563e8c4d31SAmit Kucheria error_release:
2573e8c4d31SAmit Kucheria pci_release_regions(pdev);
2583e8c4d31SAmit Kucheria error_disable:
2593e8c4d31SAmit Kucheria pci_disable_device(pdev);
2603e8c4d31SAmit Kucheria dev_err(&pdev->dev, "pci device failed to probe\n");
2613e8c4d31SAmit Kucheria return err;
2623e8c4d31SAmit Kucheria }
2633e8c4d31SAmit Kucheria
intel_pch_thermal_remove(struct pci_dev * pdev)2643e8c4d31SAmit Kucheria static void intel_pch_thermal_remove(struct pci_dev *pdev)
2653e8c4d31SAmit Kucheria {
2663e8c4d31SAmit Kucheria struct pch_thermal_device *ptd = pci_get_drvdata(pdev);
2673e8c4d31SAmit Kucheria
2683e8c4d31SAmit Kucheria thermal_zone_device_unregister(ptd->tzd);
2693e8c4d31SAmit Kucheria iounmap(ptd->hw_base);
2703e8c4d31SAmit Kucheria pci_set_drvdata(pdev, NULL);
27166dd8b80SChuhong Yuan pci_release_regions(pdev);
2723e8c4d31SAmit Kucheria pci_disable_device(pdev);
2733e8c4d31SAmit Kucheria }
2743e8c4d31SAmit Kucheria
intel_pch_thermal_suspend_noirq(struct device * device)27528708e19SZhang Rui static int intel_pch_thermal_suspend_noirq(struct device *device)
2763e8c4d31SAmit Kucheria {
27797e9cafeSChuhong Yuan struct pch_thermal_device *ptd = dev_get_drvdata(device);
278c5f43242SRafael J. Wysocki u16 pch_thr_temp, pch_cur_temp;
279c5f43242SRafael J. Wysocki int pch_delay_cnt = 0;
280c5f43242SRafael J. Wysocki u8 tsel;
2813e8c4d31SAmit Kucheria
282c5f43242SRafael J. Wysocki /* Shutdown the thermal sensor if it is not enabled by BIOS */
283c5f43242SRafael J. Wysocki if (!ptd->bios_enabled) {
284c5f43242SRafael J. Wysocki tsel = readb(ptd->hw_base + WPT_TSEL);
285c5f43242SRafael J. Wysocki writeb(tsel & 0xFE, ptd->hw_base + WPT_TSEL);
286c5f43242SRafael J. Wysocki return 0;
287c5f43242SRafael J. Wysocki }
288c5f43242SRafael J. Wysocki
289c5f43242SRafael J. Wysocki /* Do not check temperature if it is not s2idle */
290c5f43242SRafael J. Wysocki if (pm_suspend_via_firmware())
291c5f43242SRafael J. Wysocki return 0;
292c5f43242SRafael J. Wysocki
293c5f43242SRafael J. Wysocki /* Get the PCH temperature threshold value */
294c5f43242SRafael J. Wysocki pch_thr_temp = GET_PCH_TEMP(WPT_TEMP_TSR & readw(ptd->hw_base + WPT_TSPM));
295c5f43242SRafael J. Wysocki
296c5f43242SRafael J. Wysocki /* Get the PCH current temperature value */
297c5f43242SRafael J. Wysocki pch_cur_temp = GET_PCH_TEMP(WPT_TEMP_TSR & readw(ptd->hw_base + WPT_TEMP));
298c5f43242SRafael J. Wysocki
299c5f43242SRafael J. Wysocki /*
300c5f43242SRafael J. Wysocki * If current PCH temperature is higher than configured PCH threshold
301c5f43242SRafael J. Wysocki * value, run some delay loop with sleep to let the current temperature
302c5f43242SRafael J. Wysocki * go down below the threshold value which helps to allow system enter
303c5f43242SRafael J. Wysocki * lower power S0ix suspend state. Even after delay loop if PCH current
304c5f43242SRafael J. Wysocki * temperature stays above threshold, notify the warning message
305c5f43242SRafael J. Wysocki * which helps to indentify the reason why S0ix entry was rejected.
306c5f43242SRafael J. Wysocki */
307c5f43242SRafael J. Wysocki while (pch_delay_cnt < delay_cnt) {
308c5f43242SRafael J. Wysocki if (pch_cur_temp < pch_thr_temp)
309c5f43242SRafael J. Wysocki break;
310c5f43242SRafael J. Wysocki
311c5f43242SRafael J. Wysocki if (pm_wakeup_pending()) {
312c5f43242SRafael J. Wysocki dev_warn(&ptd->pdev->dev, "Wakeup event detected, abort cooling\n");
313c5f43242SRafael J. Wysocki return 0;
314c5f43242SRafael J. Wysocki }
315c5f43242SRafael J. Wysocki
316c5f43242SRafael J. Wysocki pch_delay_cnt++;
317c5f43242SRafael J. Wysocki dev_dbg(&ptd->pdev->dev,
318c5f43242SRafael J. Wysocki "CPU-PCH current temp [%dC] higher than the threshold temp [%dC], sleep %d times for %d ms duration\n",
319c5f43242SRafael J. Wysocki pch_cur_temp, pch_thr_temp, pch_delay_cnt, delay_timeout);
320c5f43242SRafael J. Wysocki msleep(delay_timeout);
321c5f43242SRafael J. Wysocki /* Read the PCH current temperature for next cycle. */
322c5f43242SRafael J. Wysocki pch_cur_temp = GET_PCH_TEMP(WPT_TEMP_TSR & readw(ptd->hw_base + WPT_TEMP));
323c5f43242SRafael J. Wysocki }
324c5f43242SRafael J. Wysocki
325c5f43242SRafael J. Wysocki if (pch_cur_temp >= pch_thr_temp)
326c5f43242SRafael J. Wysocki dev_warn(&ptd->pdev->dev,
327c5f43242SRafael J. Wysocki "CPU-PCH is hot [%dC] after %d ms delay. S0ix might fail\n",
328c5f43242SRafael J. Wysocki pch_cur_temp, pch_delay_cnt * delay_timeout);
329c5f43242SRafael J. Wysocki else {
330c5f43242SRafael J. Wysocki if (pch_delay_cnt)
331c5f43242SRafael J. Wysocki dev_info(&ptd->pdev->dev,
332c5f43242SRafael J. Wysocki "CPU-PCH is cool [%dC] after %d ms delay\n",
333c5f43242SRafael J. Wysocki pch_cur_temp, pch_delay_cnt * delay_timeout);
334c5f43242SRafael J. Wysocki else
335c5f43242SRafael J. Wysocki dev_info(&ptd->pdev->dev,
336c5f43242SRafael J. Wysocki "CPU-PCH is cool [%dC]\n",
337c5f43242SRafael J. Wysocki pch_cur_temp);
338c5f43242SRafael J. Wysocki }
339c5f43242SRafael J. Wysocki
340c5f43242SRafael J. Wysocki return 0;
3413e8c4d31SAmit Kucheria }
3423e8c4d31SAmit Kucheria
intel_pch_thermal_resume(struct device * device)3433e8c4d31SAmit Kucheria static int intel_pch_thermal_resume(struct device *device)
3443e8c4d31SAmit Kucheria {
34597e9cafeSChuhong Yuan struct pch_thermal_device *ptd = dev_get_drvdata(device);
346c5f43242SRafael J. Wysocki u8 tsel;
3473e8c4d31SAmit Kucheria
348c5f43242SRafael J. Wysocki if (ptd->bios_enabled)
349c5f43242SRafael J. Wysocki return 0;
350c5f43242SRafael J. Wysocki
351c5f43242SRafael J. Wysocki tsel = readb(ptd->hw_base + WPT_TSEL);
352c5f43242SRafael J. Wysocki
353c5f43242SRafael J. Wysocki writeb(tsel | WPT_TSEL_ETS, ptd->hw_base + WPT_TSEL);
354c5f43242SRafael J. Wysocki
355c5f43242SRafael J. Wysocki return 0;
3563e8c4d31SAmit Kucheria }
3573e8c4d31SAmit Kucheria
3583e8c4d31SAmit Kucheria static const struct pci_device_id intel_pch_thermal_id[] = {
3593e8c4d31SAmit Kucheria { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCH_THERMAL_DID_HSW_1),
360ae98e57aSRafael J. Wysocki .driver_data = PCH_BOARD_HSW, },
3613e8c4d31SAmit Kucheria { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCH_THERMAL_DID_HSW_2),
362ae98e57aSRafael J. Wysocki .driver_data = PCH_BOARD_HSW, },
3633e8c4d31SAmit Kucheria { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCH_THERMAL_DID_WPT),
364ae98e57aSRafael J. Wysocki .driver_data = PCH_BOARD_WPT, },
3653e8c4d31SAmit Kucheria { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCH_THERMAL_DID_SKL),
366ae98e57aSRafael J. Wysocki .driver_data = PCH_BOARD_SKL, },
3673e8c4d31SAmit Kucheria { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCH_THERMAL_DID_SKL_H),
368ae98e57aSRafael J. Wysocki .driver_data = PCH_BOARD_SKL, },
3693e8c4d31SAmit Kucheria { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCH_THERMAL_DID_CNL),
370ae98e57aSRafael J. Wysocki .driver_data = PCH_BOARD_CNL, },
3713e8c4d31SAmit Kucheria { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCH_THERMAL_DID_CNL_H),
372ae98e57aSRafael J. Wysocki .driver_data = PCH_BOARD_CNL, },
373c569e805SSumeet Pawnikar { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCH_THERMAL_DID_CNL_LP),
374ae98e57aSRafael J. Wysocki .driver_data = PCH_BOARD_CNL, },
37535709c4eSGayatri Kammela { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCH_THERMAL_DID_CML_H),
376ae98e57aSRafael J. Wysocki .driver_data = PCH_BOARD_CML, },
377e78acf7eSAndres Freund { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCH_THERMAL_DID_LWB),
378ae98e57aSRafael J. Wysocki .driver_data = PCH_BOARD_LWB, },
37940dc1929STim Zimmermann { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCH_THERMAL_DID_WBG),
380ae98e57aSRafael J. Wysocki .driver_data = PCH_BOARD_WBG, },
3813e8c4d31SAmit Kucheria { 0, },
3823e8c4d31SAmit Kucheria };
3833e8c4d31SAmit Kucheria MODULE_DEVICE_TABLE(pci, intel_pch_thermal_id);
3843e8c4d31SAmit Kucheria
3853e8c4d31SAmit Kucheria static const struct dev_pm_ops intel_pch_pm_ops = {
38628708e19SZhang Rui .suspend_noirq = intel_pch_thermal_suspend_noirq,
3873e8c4d31SAmit Kucheria .resume = intel_pch_thermal_resume,
3883e8c4d31SAmit Kucheria };
3893e8c4d31SAmit Kucheria
3903e8c4d31SAmit Kucheria static struct pci_driver intel_pch_thermal_driver = {
3913e8c4d31SAmit Kucheria .name = "intel_pch_thermal",
3923e8c4d31SAmit Kucheria .id_table = intel_pch_thermal_id,
3933e8c4d31SAmit Kucheria .probe = intel_pch_thermal_probe,
3943e8c4d31SAmit Kucheria .remove = intel_pch_thermal_remove,
3953e8c4d31SAmit Kucheria .driver.pm = &intel_pch_pm_ops,
3963e8c4d31SAmit Kucheria };
3973e8c4d31SAmit Kucheria
3983e8c4d31SAmit Kucheria module_pci_driver(intel_pch_thermal_driver);
3993e8c4d31SAmit Kucheria
4003e8c4d31SAmit Kucheria MODULE_LICENSE("GPL v2");
4013e8c4d31SAmit Kucheria MODULE_DESCRIPTION("Intel PCH Thermal driver");
402