2015-03-03 05:12:58 +08:00
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/*
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* intel_soc_dts_iosf.c
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* Copyright (c) 2015, Intel Corporation.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/interrupt.h>
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#include <asm/iosf_mbi.h>
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#include "intel_soc_dts_iosf.h"
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#define SOC_DTS_OFFSET_ENABLE 0xB0
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#define SOC_DTS_OFFSET_TEMP 0xB1
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#define SOC_DTS_OFFSET_PTPS 0xB2
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#define SOC_DTS_OFFSET_PTTS 0xB3
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#define SOC_DTS_OFFSET_PTTSS 0xB4
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#define SOC_DTS_OFFSET_PTMC 0x80
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#define SOC_DTS_TE_AUX0 0xB5
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#define SOC_DTS_TE_AUX1 0xB6
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#define SOC_DTS_AUX0_ENABLE_BIT BIT(0)
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#define SOC_DTS_AUX1_ENABLE_BIT BIT(1)
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#define SOC_DTS_CPU_MODULE0_ENABLE_BIT BIT(16)
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#define SOC_DTS_CPU_MODULE1_ENABLE_BIT BIT(17)
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#define SOC_DTS_TE_SCI_ENABLE BIT(9)
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#define SOC_DTS_TE_SMI_ENABLE BIT(10)
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#define SOC_DTS_TE_MSI_ENABLE BIT(11)
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#define SOC_DTS_TE_APICA_ENABLE BIT(14)
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#define SOC_DTS_PTMC_APIC_DEASSERT_BIT BIT(4)
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/* DTS encoding for TJ MAX temperature */
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#define SOC_DTS_TJMAX_ENCODING 0x7F
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/* Only 2 out of 4 is allowed for OSPM */
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#define SOC_MAX_DTS_TRIPS 2
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/* Mask for two trips in status bits */
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#define SOC_DTS_TRIP_MASK 0x03
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/* DTS0 and DTS 1 */
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#define SOC_MAX_DTS_SENSORS 2
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static int get_tj_max(u32 *tj_max)
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{
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u32 eax, edx;
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u32 val;
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int err;
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err = rdmsr_safe(MSR_IA32_TEMPERATURE_TARGET, &eax, &edx);
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if (err)
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goto err_ret;
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else {
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val = (eax >> 16) & 0xff;
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if (val)
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*tj_max = val * 1000;
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else {
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err = -EINVAL;
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goto err_ret;
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}
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}
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return 0;
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err_ret:
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*tj_max = 0;
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return err;
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}
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static int sys_get_trip_temp(struct thermal_zone_device *tzd, int trip,
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unsigned long *temp)
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{
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int status;
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u32 out;
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struct intel_soc_dts_sensor_entry *dts;
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struct intel_soc_dts_sensors *sensors;
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dts = tzd->devdata;
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sensors = dts->sensors;
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mutex_lock(&sensors->dts_update_lock);
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status = iosf_mbi_read(BT_MBI_UNIT_PMC, BT_MBI_BUNIT_READ,
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SOC_DTS_OFFSET_PTPS, &out);
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mutex_unlock(&sensors->dts_update_lock);
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if (status)
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return status;
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out = (out >> (trip * 8)) & SOC_DTS_TJMAX_ENCODING;
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if (!out)
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*temp = 0;
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else
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*temp = sensors->tj_max - out * 1000;
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return 0;
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}
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static int update_trip_temp(struct intel_soc_dts_sensor_entry *dts,
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int thres_index, unsigned long temp,
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enum thermal_trip_type trip_type)
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{
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int status;
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u32 temp_out;
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u32 out;
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u32 store_ptps;
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u32 store_ptmc;
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u32 store_te_out;
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u32 te_out;
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u32 int_enable_bit = SOC_DTS_TE_APICA_ENABLE;
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struct intel_soc_dts_sensors *sensors = dts->sensors;
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if (sensors->intr_type == INTEL_SOC_DTS_INTERRUPT_MSI)
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int_enable_bit |= SOC_DTS_TE_MSI_ENABLE;
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temp_out = (sensors->tj_max - temp) / 1000;
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status = iosf_mbi_read(BT_MBI_UNIT_PMC, BT_MBI_BUNIT_READ,
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SOC_DTS_OFFSET_PTPS, &store_ptps);
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if (status)
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return status;
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out = (store_ptps & ~(0xFF << (thres_index * 8)));
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out |= (temp_out & 0xFF) << (thres_index * 8);
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status = iosf_mbi_write(BT_MBI_UNIT_PMC, BT_MBI_BUNIT_WRITE,
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SOC_DTS_OFFSET_PTPS, out);
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if (status)
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return status;
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pr_debug("update_trip_temp PTPS = %x\n", out);
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status = iosf_mbi_read(BT_MBI_UNIT_PMC, BT_MBI_BUNIT_READ,
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SOC_DTS_OFFSET_PTMC, &out);
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if (status)
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goto err_restore_ptps;
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store_ptmc = out;
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status = iosf_mbi_read(BT_MBI_UNIT_PMC, BT_MBI_BUNIT_READ,
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SOC_DTS_TE_AUX0 + thres_index,
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&te_out);
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if (status)
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goto err_restore_ptmc;
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store_te_out = te_out;
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/* Enable for CPU module 0 and module 1 */
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out |= (SOC_DTS_CPU_MODULE0_ENABLE_BIT |
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SOC_DTS_CPU_MODULE1_ENABLE_BIT);
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if (temp) {
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if (thres_index)
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out |= SOC_DTS_AUX1_ENABLE_BIT;
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else
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out |= SOC_DTS_AUX0_ENABLE_BIT;
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te_out |= int_enable_bit;
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} else {
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if (thres_index)
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out &= ~SOC_DTS_AUX1_ENABLE_BIT;
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else
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out &= ~SOC_DTS_AUX0_ENABLE_BIT;
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te_out &= ~int_enable_bit;
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}
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status = iosf_mbi_write(BT_MBI_UNIT_PMC, BT_MBI_BUNIT_WRITE,
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SOC_DTS_OFFSET_PTMC, out);
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if (status)
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goto err_restore_te_out;
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status = iosf_mbi_write(BT_MBI_UNIT_PMC, BT_MBI_BUNIT_WRITE,
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SOC_DTS_TE_AUX0 + thres_index,
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te_out);
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if (status)
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goto err_restore_te_out;
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dts->trip_types[thres_index] = trip_type;
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return 0;
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err_restore_te_out:
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iosf_mbi_write(BT_MBI_UNIT_PMC, BT_MBI_BUNIT_WRITE,
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SOC_DTS_OFFSET_PTMC, store_te_out);
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err_restore_ptmc:
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iosf_mbi_write(BT_MBI_UNIT_PMC, BT_MBI_BUNIT_WRITE,
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SOC_DTS_OFFSET_PTMC, store_ptmc);
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err_restore_ptps:
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iosf_mbi_write(BT_MBI_UNIT_PMC, BT_MBI_BUNIT_WRITE,
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SOC_DTS_OFFSET_PTPS, store_ptps);
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/* Nothing we can do if restore fails */
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return status;
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}
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static int sys_set_trip_temp(struct thermal_zone_device *tzd, int trip,
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unsigned long temp)
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{
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struct intel_soc_dts_sensor_entry *dts = tzd->devdata;
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struct intel_soc_dts_sensors *sensors = dts->sensors;
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int status;
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if (temp > sensors->tj_max)
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return -EINVAL;
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mutex_lock(&sensors->dts_update_lock);
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status = update_trip_temp(tzd->devdata, trip, temp,
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dts->trip_types[trip]);
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mutex_unlock(&sensors->dts_update_lock);
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return status;
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}
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static int sys_get_trip_type(struct thermal_zone_device *tzd,
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int trip, enum thermal_trip_type *type)
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{
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struct intel_soc_dts_sensor_entry *dts;
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dts = tzd->devdata;
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*type = dts->trip_types[trip];
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return 0;
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}
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static int sys_get_curr_temp(struct thermal_zone_device *tzd,
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unsigned long *temp)
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{
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int status;
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u32 out;
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struct intel_soc_dts_sensor_entry *dts;
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struct intel_soc_dts_sensors *sensors;
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dts = tzd->devdata;
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sensors = dts->sensors;
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status = iosf_mbi_read(BT_MBI_UNIT_PMC, BT_MBI_BUNIT_READ,
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SOC_DTS_OFFSET_TEMP, &out);
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if (status)
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return status;
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out = (out & dts->temp_mask) >> dts->temp_shift;
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out -= SOC_DTS_TJMAX_ENCODING;
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*temp = sensors->tj_max - out * 1000;
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return 0;
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}
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static struct thermal_zone_device_ops tzone_ops = {
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.get_temp = sys_get_curr_temp,
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.get_trip_temp = sys_get_trip_temp,
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.get_trip_type = sys_get_trip_type,
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.set_trip_temp = sys_set_trip_temp,
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};
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static int soc_dts_enable(int id)
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{
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u32 out;
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int ret;
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ret = iosf_mbi_read(BT_MBI_UNIT_PMC, BT_MBI_BUNIT_READ,
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SOC_DTS_OFFSET_ENABLE, &out);
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if (ret)
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return ret;
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if (!(out & BIT(id))) {
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out |= BIT(id);
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ret = iosf_mbi_write(BT_MBI_UNIT_PMC, BT_MBI_BUNIT_WRITE,
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SOC_DTS_OFFSET_ENABLE, out);
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if (ret)
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return ret;
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}
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return ret;
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}
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static void remove_dts_thermal_zone(struct intel_soc_dts_sensor_entry *dts)
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{
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if (dts) {
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iosf_mbi_write(BT_MBI_UNIT_PMC, BT_MBI_BUNIT_WRITE,
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SOC_DTS_OFFSET_ENABLE, dts->store_status);
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thermal_zone_device_unregister(dts->tzone);
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}
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}
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static int add_dts_thermal_zone(int id, struct intel_soc_dts_sensor_entry *dts,
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bool notification_support, int trip_cnt,
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int read_only_trip_cnt)
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{
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char name[10];
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int trip_count = 0;
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int trip_mask = 0;
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u32 store_ptps;
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int ret;
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int i;
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/* Store status to restor on exit */
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ret = iosf_mbi_read(BT_MBI_UNIT_PMC, BT_MBI_BUNIT_READ,
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SOC_DTS_OFFSET_ENABLE,
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&dts->store_status);
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if (ret)
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goto err_ret;
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dts->id = id;
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dts->temp_mask = 0x00FF << (id * 8);
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dts->temp_shift = id * 8;
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if (notification_support) {
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trip_count = min(SOC_MAX_DTS_TRIPS, trip_cnt);
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trip_mask = BIT(trip_count - read_only_trip_cnt) - 1;
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}
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/* Check if the writable trip we provide is not used by BIOS */
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ret = iosf_mbi_read(BT_MBI_UNIT_PMC, BT_MBI_BUNIT_READ,
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SOC_DTS_OFFSET_PTPS, &store_ptps);
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if (ret)
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trip_mask = 0;
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else {
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for (i = 0; i < trip_count; ++i) {
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if (trip_mask & BIT(i))
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if (store_ptps & (0xff << (i * 8)))
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trip_mask &= ~BIT(i);
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}
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}
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dts->trip_mask = trip_mask;
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dts->trip_count = trip_count;
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snprintf(name, sizeof(name), "soc_dts%d", id);
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dts->tzone = thermal_zone_device_register(name,
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trip_count,
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trip_mask,
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dts, &tzone_ops,
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NULL, 0, 0);
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if (IS_ERR(dts->tzone)) {
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ret = PTR_ERR(dts->tzone);
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goto err_ret;
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}
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ret = soc_dts_enable(id);
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if (ret)
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goto err_enable;
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return 0;
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err_enable:
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thermal_zone_device_unregister(dts->tzone);
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err_ret:
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return ret;
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}
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int intel_soc_dts_iosf_add_read_only_critical_trip(
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struct intel_soc_dts_sensors *sensors, int critical_offset)
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{
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int i, j;
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for (i = 0; i < SOC_MAX_DTS_SENSORS; ++i) {
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for (j = 0; j < sensors->soc_dts[i].trip_count; ++j) {
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if (!(sensors->soc_dts[i].trip_mask & BIT(j))) {
|
2015-04-29 09:10:16 +08:00
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return update_trip_temp(&sensors->soc_dts[i], j,
|
2015-03-03 05:12:58 +08:00
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sensors->tj_max - critical_offset,
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THERMAL_TRIP_CRITICAL);
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}
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}
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|
}
|
|
|
|
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(intel_soc_dts_iosf_add_read_only_critical_trip);
|
|
|
|
|
|
|
|
void intel_soc_dts_iosf_interrupt_handler(struct intel_soc_dts_sensors *sensors)
|
|
|
|
{
|
|
|
|
u32 sticky_out;
|
|
|
|
int status;
|
|
|
|
u32 ptmc_out;
|
|
|
|
unsigned long flags;
|
|
|
|
|
|
|
|
spin_lock_irqsave(&sensors->intr_notify_lock, flags);
|
|
|
|
|
|
|
|
status = iosf_mbi_read(BT_MBI_UNIT_PMC, BT_MBI_BUNIT_READ,
|
|
|
|
SOC_DTS_OFFSET_PTMC, &ptmc_out);
|
|
|
|
ptmc_out |= SOC_DTS_PTMC_APIC_DEASSERT_BIT;
|
|
|
|
status = iosf_mbi_write(BT_MBI_UNIT_PMC, BT_MBI_BUNIT_WRITE,
|
|
|
|
SOC_DTS_OFFSET_PTMC, ptmc_out);
|
|
|
|
|
|
|
|
status = iosf_mbi_read(BT_MBI_UNIT_PMC, BT_MBI_BUNIT_READ,
|
|
|
|
SOC_DTS_OFFSET_PTTSS, &sticky_out);
|
|
|
|
pr_debug("status %d PTTSS %x\n", status, sticky_out);
|
|
|
|
if (sticky_out & SOC_DTS_TRIP_MASK) {
|
|
|
|
int i;
|
|
|
|
/* reset sticky bit */
|
|
|
|
status = iosf_mbi_write(BT_MBI_UNIT_PMC, BT_MBI_BUNIT_WRITE,
|
|
|
|
SOC_DTS_OFFSET_PTTSS, sticky_out);
|
|
|
|
spin_unlock_irqrestore(&sensors->intr_notify_lock, flags);
|
|
|
|
|
|
|
|
for (i = 0; i < SOC_MAX_DTS_SENSORS; ++i) {
|
|
|
|
pr_debug("TZD update for zone %d\n", i);
|
|
|
|
thermal_zone_device_update(sensors->soc_dts[i].tzone);
|
|
|
|
}
|
|
|
|
} else
|
|
|
|
spin_unlock_irqrestore(&sensors->intr_notify_lock, flags);
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(intel_soc_dts_iosf_interrupt_handler);
|
|
|
|
|
|
|
|
struct intel_soc_dts_sensors *intel_soc_dts_iosf_init(
|
|
|
|
enum intel_soc_dts_interrupt_type intr_type, int trip_count,
|
|
|
|
int read_only_trip_count)
|
|
|
|
{
|
|
|
|
struct intel_soc_dts_sensors *sensors;
|
|
|
|
bool notification;
|
|
|
|
u32 tj_max;
|
|
|
|
int ret;
|
|
|
|
int i;
|
|
|
|
|
|
|
|
if (!iosf_mbi_available())
|
|
|
|
return ERR_PTR(-ENODEV);
|
|
|
|
|
|
|
|
if (!trip_count || read_only_trip_count > trip_count)
|
|
|
|
return ERR_PTR(-EINVAL);
|
|
|
|
|
|
|
|
if (get_tj_max(&tj_max))
|
|
|
|
return ERR_PTR(-EINVAL);
|
|
|
|
|
|
|
|
sensors = kzalloc(sizeof(*sensors), GFP_KERNEL);
|
|
|
|
if (!sensors)
|
|
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
|
|
|
|
spin_lock_init(&sensors->intr_notify_lock);
|
|
|
|
mutex_init(&sensors->dts_update_lock);
|
|
|
|
sensors->intr_type = intr_type;
|
|
|
|
sensors->tj_max = tj_max;
|
|
|
|
if (intr_type == INTEL_SOC_DTS_INTERRUPT_NONE)
|
|
|
|
notification = false;
|
|
|
|
else
|
|
|
|
notification = true;
|
|
|
|
for (i = 0; i < SOC_MAX_DTS_SENSORS; ++i) {
|
|
|
|
sensors->soc_dts[i].sensors = sensors;
|
|
|
|
ret = add_dts_thermal_zone(i, &sensors->soc_dts[i],
|
|
|
|
notification, trip_count,
|
|
|
|
read_only_trip_count);
|
|
|
|
if (ret)
|
|
|
|
goto err_free;
|
|
|
|
}
|
|
|
|
|
|
|
|
for (i = 0; i < SOC_MAX_DTS_SENSORS; ++i) {
|
|
|
|
ret = update_trip_temp(&sensors->soc_dts[i], 0, 0,
|
|
|
|
THERMAL_TRIP_PASSIVE);
|
|
|
|
if (ret)
|
|
|
|
goto err_remove_zone;
|
|
|
|
|
|
|
|
ret = update_trip_temp(&sensors->soc_dts[i], 1, 0,
|
|
|
|
THERMAL_TRIP_PASSIVE);
|
|
|
|
if (ret)
|
|
|
|
goto err_remove_zone;
|
|
|
|
}
|
|
|
|
|
|
|
|
return sensors;
|
|
|
|
err_remove_zone:
|
|
|
|
for (i = 0; i < SOC_MAX_DTS_SENSORS; ++i)
|
|
|
|
remove_dts_thermal_zone(&sensors->soc_dts[i]);
|
|
|
|
|
|
|
|
err_free:
|
|
|
|
kfree(sensors);
|
|
|
|
return ERR_PTR(ret);
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(intel_soc_dts_iosf_init);
|
|
|
|
|
|
|
|
void intel_soc_dts_iosf_exit(struct intel_soc_dts_sensors *sensors)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
|
|
|
|
for (i = 0; i < SOC_MAX_DTS_SENSORS; ++i) {
|
|
|
|
update_trip_temp(&sensors->soc_dts[i], 0, 0, 0);
|
|
|
|
update_trip_temp(&sensors->soc_dts[i], 1, 0, 0);
|
|
|
|
remove_dts_thermal_zone(&sensors->soc_dts[i]);
|
|
|
|
}
|
|
|
|
kfree(sensors);
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(intel_soc_dts_iosf_exit);
|
|
|
|
|
|
|
|
MODULE_LICENSE("GPL v2");
|