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 */ 31*e78acf7eSAndres Freund #define PCH_THERMAL_DID_LWB 0xA1B1 /* Lewisburg PCH */ 323e8c4d31SAmit Kucheria 333e8c4d31SAmit Kucheria /* Wildcat Point-LP PCH Thermal registers */ 343e8c4d31SAmit Kucheria #define WPT_TEMP 0x0000 /* Temperature */ 353e8c4d31SAmit Kucheria #define WPT_TSC 0x04 /* Thermal Sensor Control */ 363e8c4d31SAmit Kucheria #define WPT_TSS 0x06 /* Thermal Sensor Status */ 373e8c4d31SAmit Kucheria #define WPT_TSEL 0x08 /* Thermal Sensor Enable and Lock */ 383e8c4d31SAmit Kucheria #define WPT_TSREL 0x0A /* Thermal Sensor Report Enable and Lock */ 393e8c4d31SAmit Kucheria #define WPT_TSMIC 0x0C /* Thermal Sensor SMI Control */ 403e8c4d31SAmit Kucheria #define WPT_CTT 0x0010 /* Catastrophic Trip Point */ 41ef63b043SSumeet Pawnikar #define WPT_TSPM 0x001C /* Thermal Sensor Power Management */ 423e8c4d31SAmit Kucheria #define WPT_TAHV 0x0014 /* Thermal Alert High Value */ 433e8c4d31SAmit Kucheria #define WPT_TALV 0x0018 /* Thermal Alert Low Value */ 443e8c4d31SAmit Kucheria #define WPT_TL 0x00000040 /* Throttle Value */ 453e8c4d31SAmit Kucheria #define WPT_PHL 0x0060 /* PCH Hot Level */ 463e8c4d31SAmit Kucheria #define WPT_PHLC 0x62 /* PHL Control */ 473e8c4d31SAmit Kucheria #define WPT_TAS 0x80 /* Thermal Alert Status */ 483e8c4d31SAmit Kucheria #define WPT_TSPIEN 0x82 /* PCI Interrupt Event Enables */ 493e8c4d31SAmit Kucheria #define WPT_TSGPEN 0x84 /* General Purpose Event Enables */ 503e8c4d31SAmit Kucheria 513e8c4d31SAmit Kucheria /* Wildcat Point-LP PCH Thermal Register bit definitions */ 523e8c4d31SAmit Kucheria #define WPT_TEMP_TSR 0x01ff /* Temp TS Reading */ 533e8c4d31SAmit Kucheria #define WPT_TSC_CPDE 0x01 /* Catastrophic Power-Down Enable */ 543e8c4d31SAmit Kucheria #define WPT_TSS_TSDSS 0x10 /* Thermal Sensor Dynamic Shutdown Status */ 553e8c4d31SAmit Kucheria #define WPT_TSS_GPES 0x08 /* GPE status */ 563e8c4d31SAmit Kucheria #define WPT_TSEL_ETS 0x01 /* Enable TS */ 573e8c4d31SAmit Kucheria #define WPT_TSEL_PLDB 0x80 /* TSEL Policy Lock-Down Bit */ 583e8c4d31SAmit Kucheria #define WPT_TL_TOL 0x000001FF /* T0 Level */ 593e8c4d31SAmit Kucheria #define WPT_TL_T1L 0x1ff00000 /* T1 Level */ 603e8c4d31SAmit Kucheria #define WPT_TL_TTEN 0x20000000 /* TT Enable */ 613e8c4d31SAmit Kucheria 62ef63b043SSumeet Pawnikar /* Resolution of 1/2 degree C and an offset of -50C */ 63ef63b043SSumeet Pawnikar #define PCH_TEMP_OFFSET (-50) 64ef63b043SSumeet Pawnikar #define GET_WPT_TEMP(x) ((x) * MILLIDEGREE_PER_DEGREE / 2 + WPT_TEMP_OFFSET) 65ef63b043SSumeet Pawnikar #define WPT_TEMP_OFFSET (PCH_TEMP_OFFSET * MILLIDEGREE_PER_DEGREE) 66ef63b043SSumeet Pawnikar #define GET_PCH_TEMP(x) (((x) / 2) + PCH_TEMP_OFFSET) 67ef63b043SSumeet Pawnikar 68ef63b043SSumeet Pawnikar /* Amount of time for each cooling delay, 100ms by default for now */ 69ef63b043SSumeet Pawnikar static unsigned int delay_timeout = 100; 70ef63b043SSumeet Pawnikar module_param(delay_timeout, int, 0644); 71ef63b043SSumeet Pawnikar MODULE_PARM_DESC(delay_timeout, "amount of time delay for each iteration."); 72ef63b043SSumeet Pawnikar 73ef63b043SSumeet Pawnikar /* Number of iterations for cooling delay, 10 counts by default for now */ 74ef63b043SSumeet Pawnikar static unsigned int delay_cnt = 10; 75ef63b043SSumeet Pawnikar module_param(delay_cnt, int, 0644); 76ef63b043SSumeet Pawnikar MODULE_PARM_DESC(delay_cnt, "total number of iterations for time delay."); 77ef63b043SSumeet Pawnikar 783e8c4d31SAmit Kucheria static char driver_name[] = "Intel PCH thermal driver"; 793e8c4d31SAmit Kucheria 803e8c4d31SAmit Kucheria struct pch_thermal_device { 813e8c4d31SAmit Kucheria void __iomem *hw_base; 823e8c4d31SAmit Kucheria const struct pch_dev_ops *ops; 833e8c4d31SAmit Kucheria struct pci_dev *pdev; 843e8c4d31SAmit Kucheria struct thermal_zone_device *tzd; 853e8c4d31SAmit Kucheria int crt_trip_id; 863e8c4d31SAmit Kucheria unsigned long crt_temp; 873e8c4d31SAmit Kucheria int hot_trip_id; 883e8c4d31SAmit Kucheria unsigned long hot_temp; 893e8c4d31SAmit Kucheria int psv_trip_id; 903e8c4d31SAmit Kucheria unsigned long psv_temp; 913e8c4d31SAmit Kucheria bool bios_enabled; 923e8c4d31SAmit Kucheria }; 933e8c4d31SAmit Kucheria 943e8c4d31SAmit Kucheria #ifdef CONFIG_ACPI 953e8c4d31SAmit Kucheria 963e8c4d31SAmit Kucheria /* 973e8c4d31SAmit Kucheria * On some platforms, there is a companion ACPI device, which adds 983e8c4d31SAmit Kucheria * passive trip temperature using _PSV method. There is no specific 993e8c4d31SAmit Kucheria * passive temperature setting in MMIO interface of this PCI device. 1003e8c4d31SAmit Kucheria */ 1013e8c4d31SAmit Kucheria static void pch_wpt_add_acpi_psv_trip(struct pch_thermal_device *ptd, 1023e8c4d31SAmit Kucheria int *nr_trips) 1033e8c4d31SAmit Kucheria { 1043e8c4d31SAmit Kucheria struct acpi_device *adev; 1053e8c4d31SAmit Kucheria 1063e8c4d31SAmit Kucheria ptd->psv_trip_id = -1; 1073e8c4d31SAmit Kucheria 1083e8c4d31SAmit Kucheria adev = ACPI_COMPANION(&ptd->pdev->dev); 1093e8c4d31SAmit Kucheria if (adev) { 1103e8c4d31SAmit Kucheria unsigned long long r; 1113e8c4d31SAmit Kucheria acpi_status status; 1123e8c4d31SAmit Kucheria 1133e8c4d31SAmit Kucheria status = acpi_evaluate_integer(adev->handle, "_PSV", NULL, 1143e8c4d31SAmit Kucheria &r); 1153e8c4d31SAmit Kucheria if (ACPI_SUCCESS(status)) { 1163e8c4d31SAmit Kucheria unsigned long trip_temp; 1173e8c4d31SAmit Kucheria 11897a0a49dSAkinobu Mita trip_temp = deci_kelvin_to_millicelsius(r); 1193e8c4d31SAmit Kucheria if (trip_temp) { 1203e8c4d31SAmit Kucheria ptd->psv_temp = trip_temp; 1213e8c4d31SAmit Kucheria ptd->psv_trip_id = *nr_trips; 1223e8c4d31SAmit Kucheria ++(*nr_trips); 1233e8c4d31SAmit Kucheria } 1243e8c4d31SAmit Kucheria } 1253e8c4d31SAmit Kucheria } 1263e8c4d31SAmit Kucheria } 1273e8c4d31SAmit Kucheria #else 1283e8c4d31SAmit Kucheria static void pch_wpt_add_acpi_psv_trip(struct pch_thermal_device *ptd, 1293e8c4d31SAmit Kucheria int *nr_trips) 1303e8c4d31SAmit Kucheria { 1313e8c4d31SAmit Kucheria ptd->psv_trip_id = -1; 1323e8c4d31SAmit Kucheria 1333e8c4d31SAmit Kucheria } 1343e8c4d31SAmit Kucheria #endif 1353e8c4d31SAmit Kucheria 1363e8c4d31SAmit Kucheria static int pch_wpt_init(struct pch_thermal_device *ptd, int *nr_trips) 1373e8c4d31SAmit Kucheria { 1383e8c4d31SAmit Kucheria u8 tsel; 1393e8c4d31SAmit Kucheria u16 trip_temp; 1403e8c4d31SAmit Kucheria 1413e8c4d31SAmit Kucheria *nr_trips = 0; 1423e8c4d31SAmit Kucheria 1433e8c4d31SAmit Kucheria /* Check if BIOS has already enabled thermal sensor */ 1443e8c4d31SAmit Kucheria if (WPT_TSEL_ETS & readb(ptd->hw_base + WPT_TSEL)) { 1453e8c4d31SAmit Kucheria ptd->bios_enabled = true; 1463e8c4d31SAmit Kucheria goto read_trips; 1473e8c4d31SAmit Kucheria } 1483e8c4d31SAmit Kucheria 1493e8c4d31SAmit Kucheria tsel = readb(ptd->hw_base + WPT_TSEL); 1503e8c4d31SAmit Kucheria /* 1513e8c4d31SAmit Kucheria * When TSEL's Policy Lock-Down bit is 1, TSEL become RO. 1523e8c4d31SAmit Kucheria * If so, thermal sensor cannot enable. Bail out. 1533e8c4d31SAmit Kucheria */ 1543e8c4d31SAmit Kucheria if (tsel & WPT_TSEL_PLDB) { 1553e8c4d31SAmit Kucheria dev_err(&ptd->pdev->dev, "Sensor can't be enabled\n"); 1563e8c4d31SAmit Kucheria return -ENODEV; 1573e8c4d31SAmit Kucheria } 1583e8c4d31SAmit Kucheria 1593e8c4d31SAmit Kucheria writeb(tsel|WPT_TSEL_ETS, ptd->hw_base + WPT_TSEL); 1603e8c4d31SAmit Kucheria if (!(WPT_TSEL_ETS & readb(ptd->hw_base + WPT_TSEL))) { 1613e8c4d31SAmit Kucheria dev_err(&ptd->pdev->dev, "Sensor can't be enabled\n"); 1623e8c4d31SAmit Kucheria return -ENODEV; 1633e8c4d31SAmit Kucheria } 1643e8c4d31SAmit Kucheria 1653e8c4d31SAmit Kucheria read_trips: 1663e8c4d31SAmit Kucheria ptd->crt_trip_id = -1; 1673e8c4d31SAmit Kucheria trip_temp = readw(ptd->hw_base + WPT_CTT); 1683e8c4d31SAmit Kucheria trip_temp &= 0x1FF; 1693e8c4d31SAmit Kucheria if (trip_temp) { 1703e8c4d31SAmit Kucheria /* Resolution of 1/2 degree C and an offset of -50C */ 1713e8c4d31SAmit Kucheria ptd->crt_temp = trip_temp * 1000 / 2 - 50000; 1723e8c4d31SAmit Kucheria ptd->crt_trip_id = 0; 1733e8c4d31SAmit Kucheria ++(*nr_trips); 1743e8c4d31SAmit Kucheria } 1753e8c4d31SAmit Kucheria 1763e8c4d31SAmit Kucheria ptd->hot_trip_id = -1; 1773e8c4d31SAmit Kucheria trip_temp = readw(ptd->hw_base + WPT_PHL); 1783e8c4d31SAmit Kucheria trip_temp &= 0x1FF; 1793e8c4d31SAmit Kucheria if (trip_temp) { 1803e8c4d31SAmit Kucheria /* Resolution of 1/2 degree C and an offset of -50C */ 1813e8c4d31SAmit Kucheria ptd->hot_temp = trip_temp * 1000 / 2 - 50000; 1823e8c4d31SAmit Kucheria ptd->hot_trip_id = *nr_trips; 1833e8c4d31SAmit Kucheria ++(*nr_trips); 1843e8c4d31SAmit Kucheria } 1853e8c4d31SAmit Kucheria 1863e8c4d31SAmit Kucheria pch_wpt_add_acpi_psv_trip(ptd, nr_trips); 1873e8c4d31SAmit Kucheria 1883e8c4d31SAmit Kucheria return 0; 1893e8c4d31SAmit Kucheria } 1903e8c4d31SAmit Kucheria 1913e8c4d31SAmit Kucheria static int pch_wpt_get_temp(struct pch_thermal_device *ptd, int *temp) 1923e8c4d31SAmit Kucheria { 1933e8c4d31SAmit Kucheria u16 wpt_temp; 1943e8c4d31SAmit Kucheria 1953e8c4d31SAmit Kucheria wpt_temp = WPT_TEMP_TSR & readw(ptd->hw_base + WPT_TEMP); 1963e8c4d31SAmit Kucheria 1973e8c4d31SAmit Kucheria /* Resolution of 1/2 degree C and an offset of -50C */ 1983e8c4d31SAmit Kucheria *temp = (wpt_temp * 1000 / 2 - 50000); 1993e8c4d31SAmit Kucheria 2003e8c4d31SAmit Kucheria return 0; 2013e8c4d31SAmit Kucheria } 2023e8c4d31SAmit Kucheria 2033e8c4d31SAmit Kucheria static int pch_wpt_suspend(struct pch_thermal_device *ptd) 2043e8c4d31SAmit Kucheria { 2053e8c4d31SAmit Kucheria u8 tsel; 206ef63b043SSumeet Pawnikar u8 pch_delay_cnt = 1; 207ef63b043SSumeet Pawnikar u16 pch_thr_temp, pch_cur_temp; 2083e8c4d31SAmit Kucheria 209ef63b043SSumeet Pawnikar /* Shutdown the thermal sensor if it is not enabled by BIOS */ 210ef63b043SSumeet Pawnikar if (!ptd->bios_enabled) { 211ef63b043SSumeet Pawnikar tsel = readb(ptd->hw_base + WPT_TSEL); 212ef63b043SSumeet Pawnikar writeb(tsel & 0xFE, ptd->hw_base + WPT_TSEL); 213ef63b043SSumeet Pawnikar return 0; 214ef63b043SSumeet Pawnikar } 215ef63b043SSumeet Pawnikar 216ef63b043SSumeet Pawnikar /* Do not check temperature if it is not a S0ix capable platform */ 217ef63b043SSumeet Pawnikar if (!(acpi_gbl_FADT.flags & ACPI_FADT_LOW_POWER_S0)) 2183e8c4d31SAmit Kucheria return 0; 2193e8c4d31SAmit Kucheria 220ef63b043SSumeet Pawnikar /* Do not check temperature if it is not s2idle */ 221ef63b043SSumeet Pawnikar if (pm_suspend_via_firmware()) 222ef63b043SSumeet Pawnikar return 0; 2233e8c4d31SAmit Kucheria 224ef63b043SSumeet Pawnikar /* Get the PCH temperature threshold value */ 225ef63b043SSumeet Pawnikar pch_thr_temp = GET_PCH_TEMP(WPT_TEMP_TSR & readw(ptd->hw_base + WPT_TSPM)); 226ef63b043SSumeet Pawnikar 227ef63b043SSumeet Pawnikar /* Get the PCH current temperature value */ 228ef63b043SSumeet Pawnikar pch_cur_temp = GET_PCH_TEMP(WPT_TEMP_TSR & readw(ptd->hw_base + WPT_TEMP)); 229ef63b043SSumeet Pawnikar 230ef63b043SSumeet Pawnikar /* 231ef63b043SSumeet Pawnikar * If current PCH temperature is higher than configured PCH threshold 232ef63b043SSumeet Pawnikar * value, run some delay loop with sleep to let the current temperature 233ef63b043SSumeet Pawnikar * go down below the threshold value which helps to allow system enter 234ef63b043SSumeet Pawnikar * lower power S0ix suspend state. Even after delay loop if PCH current 235ef63b043SSumeet Pawnikar * temperature stays above threshold, notify the warning message 236ef63b043SSumeet Pawnikar * which helps to indentify the reason why S0ix entry was rejected. 237ef63b043SSumeet Pawnikar */ 238ef63b043SSumeet Pawnikar while (pch_delay_cnt <= delay_cnt) { 239ef63b043SSumeet Pawnikar if (pch_cur_temp <= pch_thr_temp) 240ef63b043SSumeet Pawnikar break; 241ef63b043SSumeet Pawnikar 242ef63b043SSumeet Pawnikar dev_warn(&ptd->pdev->dev, 243ef63b043SSumeet Pawnikar "CPU-PCH current temp [%dC] higher than the threshold temp [%dC], sleep %d times for %d ms duration\n", 244ef63b043SSumeet Pawnikar pch_cur_temp, pch_thr_temp, pch_delay_cnt, delay_timeout); 245ef63b043SSumeet Pawnikar msleep(delay_timeout); 246ef63b043SSumeet Pawnikar /* Read the PCH current temperature for next cycle. */ 247ef63b043SSumeet Pawnikar pch_cur_temp = GET_PCH_TEMP(WPT_TEMP_TSR & readw(ptd->hw_base + WPT_TEMP)); 248ef63b043SSumeet Pawnikar pch_delay_cnt++; 249ef63b043SSumeet Pawnikar } 250ef63b043SSumeet Pawnikar 251ef63b043SSumeet Pawnikar if (pch_cur_temp > pch_thr_temp) 252ef63b043SSumeet Pawnikar dev_warn(&ptd->pdev->dev, 253ef63b043SSumeet Pawnikar "CPU-PCH is hot [%dC] even after delay, continue to suspend. S0ix might fail\n", 254ef63b043SSumeet Pawnikar pch_cur_temp); 255ef63b043SSumeet Pawnikar else 256ef63b043SSumeet Pawnikar dev_info(&ptd->pdev->dev, 257ef63b043SSumeet Pawnikar "CPU-PCH is cool [%dC], continue to suspend\n", pch_cur_temp); 2583e8c4d31SAmit Kucheria 2593e8c4d31SAmit Kucheria return 0; 2603e8c4d31SAmit Kucheria } 2613e8c4d31SAmit Kucheria 2623e8c4d31SAmit Kucheria static int pch_wpt_resume(struct pch_thermal_device *ptd) 2633e8c4d31SAmit Kucheria { 2643e8c4d31SAmit Kucheria u8 tsel; 2653e8c4d31SAmit Kucheria 2663e8c4d31SAmit Kucheria if (ptd->bios_enabled) 2673e8c4d31SAmit Kucheria return 0; 2683e8c4d31SAmit Kucheria 2693e8c4d31SAmit Kucheria tsel = readb(ptd->hw_base + WPT_TSEL); 2703e8c4d31SAmit Kucheria 2713e8c4d31SAmit Kucheria writeb(tsel | WPT_TSEL_ETS, ptd->hw_base + WPT_TSEL); 2723e8c4d31SAmit Kucheria 2733e8c4d31SAmit Kucheria return 0; 2743e8c4d31SAmit Kucheria } 2753e8c4d31SAmit Kucheria 2763e8c4d31SAmit Kucheria struct pch_dev_ops { 2773e8c4d31SAmit Kucheria int (*hw_init)(struct pch_thermal_device *ptd, int *nr_trips); 2783e8c4d31SAmit Kucheria int (*get_temp)(struct pch_thermal_device *ptd, int *temp); 2793e8c4d31SAmit Kucheria int (*suspend)(struct pch_thermal_device *ptd); 2803e8c4d31SAmit Kucheria int (*resume)(struct pch_thermal_device *ptd); 2813e8c4d31SAmit Kucheria }; 2823e8c4d31SAmit Kucheria 2833e8c4d31SAmit Kucheria 2843e8c4d31SAmit Kucheria /* dev ops for Wildcat Point */ 2853e8c4d31SAmit Kucheria static const struct pch_dev_ops pch_dev_ops_wpt = { 2863e8c4d31SAmit Kucheria .hw_init = pch_wpt_init, 2873e8c4d31SAmit Kucheria .get_temp = pch_wpt_get_temp, 2883e8c4d31SAmit Kucheria .suspend = pch_wpt_suspend, 2893e8c4d31SAmit Kucheria .resume = pch_wpt_resume, 2903e8c4d31SAmit Kucheria }; 2913e8c4d31SAmit Kucheria 2923e8c4d31SAmit Kucheria static int pch_thermal_get_temp(struct thermal_zone_device *tzd, int *temp) 2933e8c4d31SAmit Kucheria { 2943e8c4d31SAmit Kucheria struct pch_thermal_device *ptd = tzd->devdata; 2953e8c4d31SAmit Kucheria 2963e8c4d31SAmit Kucheria return ptd->ops->get_temp(ptd, temp); 2973e8c4d31SAmit Kucheria } 2983e8c4d31SAmit Kucheria 2993e8c4d31SAmit Kucheria static int pch_get_trip_type(struct thermal_zone_device *tzd, int trip, 3003e8c4d31SAmit Kucheria enum thermal_trip_type *type) 3013e8c4d31SAmit Kucheria { 3023e8c4d31SAmit Kucheria struct pch_thermal_device *ptd = tzd->devdata; 3033e8c4d31SAmit Kucheria 3043e8c4d31SAmit Kucheria if (ptd->crt_trip_id == trip) 3053e8c4d31SAmit Kucheria *type = THERMAL_TRIP_CRITICAL; 3063e8c4d31SAmit Kucheria else if (ptd->hot_trip_id == trip) 3073e8c4d31SAmit Kucheria *type = THERMAL_TRIP_HOT; 3083e8c4d31SAmit Kucheria else if (ptd->psv_trip_id == trip) 3093e8c4d31SAmit Kucheria *type = THERMAL_TRIP_PASSIVE; 3103e8c4d31SAmit Kucheria else 3113e8c4d31SAmit Kucheria return -EINVAL; 3123e8c4d31SAmit Kucheria 3133e8c4d31SAmit Kucheria return 0; 3143e8c4d31SAmit Kucheria } 3153e8c4d31SAmit Kucheria 3163e8c4d31SAmit Kucheria static int pch_get_trip_temp(struct thermal_zone_device *tzd, int trip, int *temp) 3173e8c4d31SAmit Kucheria { 3183e8c4d31SAmit Kucheria struct pch_thermal_device *ptd = tzd->devdata; 3193e8c4d31SAmit Kucheria 3203e8c4d31SAmit Kucheria if (ptd->crt_trip_id == trip) 3213e8c4d31SAmit Kucheria *temp = ptd->crt_temp; 3223e8c4d31SAmit Kucheria else if (ptd->hot_trip_id == trip) 3233e8c4d31SAmit Kucheria *temp = ptd->hot_temp; 3243e8c4d31SAmit Kucheria else if (ptd->psv_trip_id == trip) 3253e8c4d31SAmit Kucheria *temp = ptd->psv_temp; 3263e8c4d31SAmit Kucheria else 3273e8c4d31SAmit Kucheria return -EINVAL; 3283e8c4d31SAmit Kucheria 3293e8c4d31SAmit Kucheria return 0; 3303e8c4d31SAmit Kucheria } 3313e8c4d31SAmit Kucheria 3323e8c4d31SAmit Kucheria static struct thermal_zone_device_ops tzd_ops = { 3333e8c4d31SAmit Kucheria .get_temp = pch_thermal_get_temp, 3343e8c4d31SAmit Kucheria .get_trip_type = pch_get_trip_type, 3353e8c4d31SAmit Kucheria .get_trip_temp = pch_get_trip_temp, 3363e8c4d31SAmit Kucheria }; 3373e8c4d31SAmit Kucheria 3383e8c4d31SAmit Kucheria enum board_ids { 3393e8c4d31SAmit Kucheria board_hsw, 3403e8c4d31SAmit Kucheria board_wpt, 3413e8c4d31SAmit Kucheria board_skl, 3423e8c4d31SAmit Kucheria board_cnl, 34335709c4eSGayatri Kammela board_cml, 344*e78acf7eSAndres Freund board_lwb, 3453e8c4d31SAmit Kucheria }; 3463e8c4d31SAmit Kucheria 3473e8c4d31SAmit Kucheria static const struct board_info { 3483e8c4d31SAmit Kucheria const char *name; 3493e8c4d31SAmit Kucheria const struct pch_dev_ops *ops; 3503e8c4d31SAmit Kucheria } board_info[] = { 3513e8c4d31SAmit Kucheria [board_hsw] = { 3523e8c4d31SAmit Kucheria .name = "pch_haswell", 3533e8c4d31SAmit Kucheria .ops = &pch_dev_ops_wpt, 3543e8c4d31SAmit Kucheria }, 3553e8c4d31SAmit Kucheria [board_wpt] = { 3563e8c4d31SAmit Kucheria .name = "pch_wildcat_point", 3573e8c4d31SAmit Kucheria .ops = &pch_dev_ops_wpt, 3583e8c4d31SAmit Kucheria }, 3593e8c4d31SAmit Kucheria [board_skl] = { 3603e8c4d31SAmit Kucheria .name = "pch_skylake", 3613e8c4d31SAmit Kucheria .ops = &pch_dev_ops_wpt, 3623e8c4d31SAmit Kucheria }, 3633e8c4d31SAmit Kucheria [board_cnl] = { 3643e8c4d31SAmit Kucheria .name = "pch_cannonlake", 3653e8c4d31SAmit Kucheria .ops = &pch_dev_ops_wpt, 3663e8c4d31SAmit Kucheria }, 36735709c4eSGayatri Kammela [board_cml] = { 36835709c4eSGayatri Kammela .name = "pch_cometlake", 36935709c4eSGayatri Kammela .ops = &pch_dev_ops_wpt, 370*e78acf7eSAndres Freund }, 371*e78acf7eSAndres Freund [board_lwb] = { 372*e78acf7eSAndres Freund .name = "pch_lewisburg", 373*e78acf7eSAndres Freund .ops = &pch_dev_ops_wpt, 374*e78acf7eSAndres Freund }, 3753e8c4d31SAmit Kucheria }; 3763e8c4d31SAmit Kucheria 3773e8c4d31SAmit Kucheria static int intel_pch_thermal_probe(struct pci_dev *pdev, 3783e8c4d31SAmit Kucheria const struct pci_device_id *id) 3793e8c4d31SAmit Kucheria { 3803e8c4d31SAmit Kucheria enum board_ids board_id = id->driver_data; 3813e8c4d31SAmit Kucheria const struct board_info *bi = &board_info[board_id]; 3823e8c4d31SAmit Kucheria struct pch_thermal_device *ptd; 3833e8c4d31SAmit Kucheria int err; 3843e8c4d31SAmit Kucheria int nr_trips; 3853e8c4d31SAmit Kucheria 3863e8c4d31SAmit Kucheria ptd = devm_kzalloc(&pdev->dev, sizeof(*ptd), GFP_KERNEL); 3873e8c4d31SAmit Kucheria if (!ptd) 3883e8c4d31SAmit Kucheria return -ENOMEM; 3893e8c4d31SAmit Kucheria 3903e8c4d31SAmit Kucheria ptd->ops = bi->ops; 3913e8c4d31SAmit Kucheria 3923e8c4d31SAmit Kucheria pci_set_drvdata(pdev, ptd); 3933e8c4d31SAmit Kucheria ptd->pdev = pdev; 3943e8c4d31SAmit Kucheria 3953e8c4d31SAmit Kucheria err = pci_enable_device(pdev); 3963e8c4d31SAmit Kucheria if (err) { 3973e8c4d31SAmit Kucheria dev_err(&pdev->dev, "failed to enable pci device\n"); 3983e8c4d31SAmit Kucheria return err; 3993e8c4d31SAmit Kucheria } 4003e8c4d31SAmit Kucheria 4013e8c4d31SAmit Kucheria err = pci_request_regions(pdev, driver_name); 4023e8c4d31SAmit Kucheria if (err) { 4033e8c4d31SAmit Kucheria dev_err(&pdev->dev, "failed to request pci region\n"); 4043e8c4d31SAmit Kucheria goto error_disable; 4053e8c4d31SAmit Kucheria } 4063e8c4d31SAmit Kucheria 4073e8c4d31SAmit Kucheria ptd->hw_base = pci_ioremap_bar(pdev, 0); 4083e8c4d31SAmit Kucheria if (!ptd->hw_base) { 4093e8c4d31SAmit Kucheria err = -ENOMEM; 4103e8c4d31SAmit Kucheria dev_err(&pdev->dev, "failed to map mem base\n"); 4113e8c4d31SAmit Kucheria goto error_release; 4123e8c4d31SAmit Kucheria } 4133e8c4d31SAmit Kucheria 4143e8c4d31SAmit Kucheria err = ptd->ops->hw_init(ptd, &nr_trips); 4153e8c4d31SAmit Kucheria if (err) 4163e8c4d31SAmit Kucheria goto error_cleanup; 4173e8c4d31SAmit Kucheria 4183e8c4d31SAmit Kucheria ptd->tzd = thermal_zone_device_register(bi->name, nr_trips, 0, ptd, 4193e8c4d31SAmit Kucheria &tzd_ops, NULL, 0, 0); 4203e8c4d31SAmit Kucheria if (IS_ERR(ptd->tzd)) { 4213e8c4d31SAmit Kucheria dev_err(&pdev->dev, "Failed to register thermal zone %s\n", 4223e8c4d31SAmit Kucheria bi->name); 4233e8c4d31SAmit Kucheria err = PTR_ERR(ptd->tzd); 4243e8c4d31SAmit Kucheria goto error_cleanup; 4253e8c4d31SAmit Kucheria } 426bbcf90c0SAndrzej Pietrasiewicz err = thermal_zone_device_enable(ptd->tzd); 427bbcf90c0SAndrzej Pietrasiewicz if (err) 428bbcf90c0SAndrzej Pietrasiewicz goto err_unregister; 4293e8c4d31SAmit Kucheria 4303e8c4d31SAmit Kucheria return 0; 4313e8c4d31SAmit Kucheria 432bbcf90c0SAndrzej Pietrasiewicz err_unregister: 433bbcf90c0SAndrzej Pietrasiewicz thermal_zone_device_unregister(ptd->tzd); 4343e8c4d31SAmit Kucheria error_cleanup: 4353e8c4d31SAmit Kucheria iounmap(ptd->hw_base); 4363e8c4d31SAmit Kucheria error_release: 4373e8c4d31SAmit Kucheria pci_release_regions(pdev); 4383e8c4d31SAmit Kucheria error_disable: 4393e8c4d31SAmit Kucheria pci_disable_device(pdev); 4403e8c4d31SAmit Kucheria dev_err(&pdev->dev, "pci device failed to probe\n"); 4413e8c4d31SAmit Kucheria return err; 4423e8c4d31SAmit Kucheria } 4433e8c4d31SAmit Kucheria 4443e8c4d31SAmit Kucheria static void intel_pch_thermal_remove(struct pci_dev *pdev) 4453e8c4d31SAmit Kucheria { 4463e8c4d31SAmit Kucheria struct pch_thermal_device *ptd = pci_get_drvdata(pdev); 4473e8c4d31SAmit Kucheria 4483e8c4d31SAmit Kucheria thermal_zone_device_unregister(ptd->tzd); 4493e8c4d31SAmit Kucheria iounmap(ptd->hw_base); 4503e8c4d31SAmit Kucheria pci_set_drvdata(pdev, NULL); 45166dd8b80SChuhong Yuan pci_release_regions(pdev); 4523e8c4d31SAmit Kucheria pci_disable_device(pdev); 4533e8c4d31SAmit Kucheria } 4543e8c4d31SAmit Kucheria 4553e8c4d31SAmit Kucheria static int intel_pch_thermal_suspend(struct device *device) 4563e8c4d31SAmit Kucheria { 45797e9cafeSChuhong Yuan struct pch_thermal_device *ptd = dev_get_drvdata(device); 4583e8c4d31SAmit Kucheria 4593e8c4d31SAmit Kucheria return ptd->ops->suspend(ptd); 4603e8c4d31SAmit Kucheria } 4613e8c4d31SAmit Kucheria 4623e8c4d31SAmit Kucheria static int intel_pch_thermal_resume(struct device *device) 4633e8c4d31SAmit Kucheria { 46497e9cafeSChuhong Yuan struct pch_thermal_device *ptd = dev_get_drvdata(device); 4653e8c4d31SAmit Kucheria 4663e8c4d31SAmit Kucheria return ptd->ops->resume(ptd); 4673e8c4d31SAmit Kucheria } 4683e8c4d31SAmit Kucheria 4693e8c4d31SAmit Kucheria static const struct pci_device_id intel_pch_thermal_id[] = { 4703e8c4d31SAmit Kucheria { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCH_THERMAL_DID_HSW_1), 4713e8c4d31SAmit Kucheria .driver_data = board_hsw, }, 4723e8c4d31SAmit Kucheria { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCH_THERMAL_DID_HSW_2), 4733e8c4d31SAmit Kucheria .driver_data = board_hsw, }, 4743e8c4d31SAmit Kucheria { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCH_THERMAL_DID_WPT), 4753e8c4d31SAmit Kucheria .driver_data = board_wpt, }, 4763e8c4d31SAmit Kucheria { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCH_THERMAL_DID_SKL), 4773e8c4d31SAmit Kucheria .driver_data = board_skl, }, 4783e8c4d31SAmit Kucheria { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCH_THERMAL_DID_SKL_H), 4793e8c4d31SAmit Kucheria .driver_data = board_skl, }, 4803e8c4d31SAmit Kucheria { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCH_THERMAL_DID_CNL), 4813e8c4d31SAmit Kucheria .driver_data = board_cnl, }, 4823e8c4d31SAmit Kucheria { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCH_THERMAL_DID_CNL_H), 4833e8c4d31SAmit Kucheria .driver_data = board_cnl, }, 484c569e805SSumeet Pawnikar { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCH_THERMAL_DID_CNL_LP), 485c569e805SSumeet Pawnikar .driver_data = board_cnl, }, 48635709c4eSGayatri Kammela { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCH_THERMAL_DID_CML_H), 48735709c4eSGayatri Kammela .driver_data = board_cml, }, 488*e78acf7eSAndres Freund { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCH_THERMAL_DID_LWB), 489*e78acf7eSAndres Freund .driver_data = board_lwb, }, 4903e8c4d31SAmit Kucheria { 0, }, 4913e8c4d31SAmit Kucheria }; 4923e8c4d31SAmit Kucheria MODULE_DEVICE_TABLE(pci, intel_pch_thermal_id); 4933e8c4d31SAmit Kucheria 4943e8c4d31SAmit Kucheria static const struct dev_pm_ops intel_pch_pm_ops = { 4953e8c4d31SAmit Kucheria .suspend = intel_pch_thermal_suspend, 4963e8c4d31SAmit Kucheria .resume = intel_pch_thermal_resume, 4973e8c4d31SAmit Kucheria }; 4983e8c4d31SAmit Kucheria 4993e8c4d31SAmit Kucheria static struct pci_driver intel_pch_thermal_driver = { 5003e8c4d31SAmit Kucheria .name = "intel_pch_thermal", 5013e8c4d31SAmit Kucheria .id_table = intel_pch_thermal_id, 5023e8c4d31SAmit Kucheria .probe = intel_pch_thermal_probe, 5033e8c4d31SAmit Kucheria .remove = intel_pch_thermal_remove, 5043e8c4d31SAmit Kucheria .driver.pm = &intel_pch_pm_ops, 5053e8c4d31SAmit Kucheria }; 5063e8c4d31SAmit Kucheria 5073e8c4d31SAmit Kucheria module_pci_driver(intel_pch_thermal_driver); 5083e8c4d31SAmit Kucheria 5093e8c4d31SAmit Kucheria MODULE_LICENSE("GPL v2"); 5103e8c4d31SAmit Kucheria MODULE_DESCRIPTION("Intel PCH Thermal driver"); 511