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a68d35323b
* acpi-assorted: ACPI: Add DMI entry for Sony VGN-FW41E_H ACPI: fix obsolete comment in custom_method.c ACPI / thermal: Use mode to enable/disable kernel thermal processing ACPI thermal: remove unnecessary newline from exception message ACPI sysfs: remove unnecessary newline from exception ACPI video: remove unnecessary newline from error messages ACPI: SRAT: report non-volatile memory in debug ACPI: Rework acpi_get_child() to be more efficient
1273 lines
32 KiB
C
1273 lines
32 KiB
C
/*
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* acpi_thermal.c - ACPI Thermal Zone Driver ($Revision: 41 $)
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*
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* Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
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* Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or (at
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* your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*
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* This driver fully implements the ACPI thermal policy as described in the
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* ACPI 2.0 Specification.
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*
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* TBD: 1. Implement passive cooling hysteresis.
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* 2. Enhance passive cooling (CPU) states/limit interface to support
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* concepts of 'multiple limiters', upper/lower limits, etc.
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*
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/dmi.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/types.h>
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#include <linux/jiffies.h>
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#include <linux/kmod.h>
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#include <linux/reboot.h>
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#include <linux/device.h>
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#include <asm/uaccess.h>
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#include <linux/thermal.h>
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#include <acpi/acpi_bus.h>
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#include <acpi/acpi_drivers.h>
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#define PREFIX "ACPI: "
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#define ACPI_THERMAL_CLASS "thermal_zone"
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#define ACPI_THERMAL_DEVICE_NAME "Thermal Zone"
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#define ACPI_THERMAL_FILE_STATE "state"
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#define ACPI_THERMAL_FILE_TEMPERATURE "temperature"
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#define ACPI_THERMAL_FILE_TRIP_POINTS "trip_points"
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#define ACPI_THERMAL_FILE_COOLING_MODE "cooling_mode"
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#define ACPI_THERMAL_FILE_POLLING_FREQ "polling_frequency"
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#define ACPI_THERMAL_NOTIFY_TEMPERATURE 0x80
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#define ACPI_THERMAL_NOTIFY_THRESHOLDS 0x81
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#define ACPI_THERMAL_NOTIFY_DEVICES 0x82
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#define ACPI_THERMAL_NOTIFY_CRITICAL 0xF0
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#define ACPI_THERMAL_NOTIFY_HOT 0xF1
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#define ACPI_THERMAL_MODE_ACTIVE 0x00
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#define ACPI_THERMAL_MAX_ACTIVE 10
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#define ACPI_THERMAL_MAX_LIMIT_STR_LEN 65
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#define _COMPONENT ACPI_THERMAL_COMPONENT
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ACPI_MODULE_NAME("thermal");
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MODULE_AUTHOR("Paul Diefenbaugh");
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MODULE_DESCRIPTION("ACPI Thermal Zone Driver");
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MODULE_LICENSE("GPL");
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static int act;
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module_param(act, int, 0644);
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MODULE_PARM_DESC(act, "Disable or override all lowest active trip points.");
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static int crt;
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module_param(crt, int, 0644);
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MODULE_PARM_DESC(crt, "Disable or lower all critical trip points.");
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static int tzp;
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module_param(tzp, int, 0444);
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MODULE_PARM_DESC(tzp, "Thermal zone polling frequency, in 1/10 seconds.");
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static int nocrt;
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module_param(nocrt, int, 0);
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MODULE_PARM_DESC(nocrt, "Set to take no action upon ACPI thermal zone critical trips points.");
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static int off;
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module_param(off, int, 0);
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MODULE_PARM_DESC(off, "Set to disable ACPI thermal support.");
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static int psv;
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module_param(psv, int, 0644);
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MODULE_PARM_DESC(psv, "Disable or override all passive trip points.");
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static int acpi_thermal_add(struct acpi_device *device);
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static int acpi_thermal_remove(struct acpi_device *device);
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static void acpi_thermal_notify(struct acpi_device *device, u32 event);
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static const struct acpi_device_id thermal_device_ids[] = {
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{ACPI_THERMAL_HID, 0},
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{"", 0},
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};
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MODULE_DEVICE_TABLE(acpi, thermal_device_ids);
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#ifdef CONFIG_PM_SLEEP
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static int acpi_thermal_resume(struct device *dev);
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#endif
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static SIMPLE_DEV_PM_OPS(acpi_thermal_pm, NULL, acpi_thermal_resume);
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static struct acpi_driver acpi_thermal_driver = {
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.name = "thermal",
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.class = ACPI_THERMAL_CLASS,
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.ids = thermal_device_ids,
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.ops = {
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.add = acpi_thermal_add,
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.remove = acpi_thermal_remove,
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.notify = acpi_thermal_notify,
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},
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.drv.pm = &acpi_thermal_pm,
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};
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struct acpi_thermal_state {
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u8 critical:1;
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u8 hot:1;
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u8 passive:1;
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u8 active:1;
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u8 reserved:4;
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int active_index;
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};
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struct acpi_thermal_state_flags {
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u8 valid:1;
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u8 enabled:1;
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u8 reserved:6;
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};
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struct acpi_thermal_critical {
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struct acpi_thermal_state_flags flags;
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unsigned long temperature;
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};
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struct acpi_thermal_hot {
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struct acpi_thermal_state_flags flags;
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unsigned long temperature;
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};
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struct acpi_thermal_passive {
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struct acpi_thermal_state_flags flags;
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unsigned long temperature;
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unsigned long tc1;
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unsigned long tc2;
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unsigned long tsp;
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struct acpi_handle_list devices;
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};
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struct acpi_thermal_active {
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struct acpi_thermal_state_flags flags;
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unsigned long temperature;
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struct acpi_handle_list devices;
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};
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struct acpi_thermal_trips {
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struct acpi_thermal_critical critical;
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struct acpi_thermal_hot hot;
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struct acpi_thermal_passive passive;
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struct acpi_thermal_active active[ACPI_THERMAL_MAX_ACTIVE];
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};
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struct acpi_thermal_flags {
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u8 cooling_mode:1; /* _SCP */
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u8 devices:1; /* _TZD */
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u8 reserved:6;
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};
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struct acpi_thermal {
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struct acpi_device * device;
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acpi_bus_id name;
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unsigned long temperature;
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unsigned long last_temperature;
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unsigned long polling_frequency;
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volatile u8 zombie;
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struct acpi_thermal_flags flags;
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struct acpi_thermal_state state;
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struct acpi_thermal_trips trips;
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struct acpi_handle_list devices;
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struct thermal_zone_device *thermal_zone;
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int tz_enabled;
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int kelvin_offset;
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struct mutex lock;
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};
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/* --------------------------------------------------------------------------
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Thermal Zone Management
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-------------------------------------------------------------------------- */
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static int acpi_thermal_get_temperature(struct acpi_thermal *tz)
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{
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acpi_status status = AE_OK;
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unsigned long long tmp;
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if (!tz)
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return -EINVAL;
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tz->last_temperature = tz->temperature;
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status = acpi_evaluate_integer(tz->device->handle, "_TMP", NULL, &tmp);
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if (ACPI_FAILURE(status))
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return -ENODEV;
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tz->temperature = tmp;
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ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Temperature is %lu dK\n",
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tz->temperature));
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return 0;
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}
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static int acpi_thermal_get_polling_frequency(struct acpi_thermal *tz)
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{
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acpi_status status = AE_OK;
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unsigned long long tmp;
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if (!tz)
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return -EINVAL;
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status = acpi_evaluate_integer(tz->device->handle, "_TZP", NULL, &tmp);
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if (ACPI_FAILURE(status))
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return -ENODEV;
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tz->polling_frequency = tmp;
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ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Polling frequency is %lu dS\n",
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tz->polling_frequency));
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return 0;
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}
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static int acpi_thermal_set_cooling_mode(struct acpi_thermal *tz, int mode)
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{
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acpi_status status = AE_OK;
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union acpi_object arg0 = { ACPI_TYPE_INTEGER };
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struct acpi_object_list arg_list = { 1, &arg0 };
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acpi_handle handle = NULL;
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if (!tz)
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return -EINVAL;
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status = acpi_get_handle(tz->device->handle, "_SCP", &handle);
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if (ACPI_FAILURE(status)) {
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ACPI_DEBUG_PRINT((ACPI_DB_INFO, "_SCP not present\n"));
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return -ENODEV;
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}
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arg0.integer.value = mode;
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status = acpi_evaluate_object(handle, NULL, &arg_list, NULL);
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if (ACPI_FAILURE(status))
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return -ENODEV;
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return 0;
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}
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#define ACPI_TRIPS_CRITICAL 0x01
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#define ACPI_TRIPS_HOT 0x02
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#define ACPI_TRIPS_PASSIVE 0x04
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#define ACPI_TRIPS_ACTIVE 0x08
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#define ACPI_TRIPS_DEVICES 0x10
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#define ACPI_TRIPS_REFRESH_THRESHOLDS (ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE)
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#define ACPI_TRIPS_REFRESH_DEVICES ACPI_TRIPS_DEVICES
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#define ACPI_TRIPS_INIT (ACPI_TRIPS_CRITICAL | ACPI_TRIPS_HOT | \
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ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE | \
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ACPI_TRIPS_DEVICES)
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/*
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* This exception is thrown out in two cases:
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* 1.An invalid trip point becomes invalid or a valid trip point becomes invalid
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* when re-evaluating the AML code.
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* 2.TODO: Devices listed in _PSL, _ALx, _TZD may change.
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* We need to re-bind the cooling devices of a thermal zone when this occurs.
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*/
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#define ACPI_THERMAL_TRIPS_EXCEPTION(flags, str) \
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do { \
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if (flags != ACPI_TRIPS_INIT) \
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ACPI_EXCEPTION((AE_INFO, AE_ERROR, \
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"ACPI thermal trip point %s changed\n" \
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"Please send acpidump to linux-acpi@vger.kernel.org", str)); \
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} while (0)
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static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag)
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{
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acpi_status status = AE_OK;
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unsigned long long tmp;
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struct acpi_handle_list devices;
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int valid = 0;
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int i;
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/* Critical Shutdown */
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if (flag & ACPI_TRIPS_CRITICAL) {
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status = acpi_evaluate_integer(tz->device->handle,
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"_CRT", NULL, &tmp);
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tz->trips.critical.temperature = tmp;
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/*
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* Treat freezing temperatures as invalid as well; some
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* BIOSes return really low values and cause reboots at startup.
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* Below zero (Celsius) values clearly aren't right for sure..
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* ... so lets discard those as invalid.
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*/
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if (ACPI_FAILURE(status)) {
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tz->trips.critical.flags.valid = 0;
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ACPI_DEBUG_PRINT((ACPI_DB_INFO,
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"No critical threshold\n"));
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} else if (tmp <= 2732) {
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printk(KERN_WARNING FW_BUG "Invalid critical threshold "
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"(%llu)\n", tmp);
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tz->trips.critical.flags.valid = 0;
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} else {
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tz->trips.critical.flags.valid = 1;
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ACPI_DEBUG_PRINT((ACPI_DB_INFO,
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"Found critical threshold [%lu]\n",
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tz->trips.critical.temperature));
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}
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if (tz->trips.critical.flags.valid == 1) {
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if (crt == -1) {
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tz->trips.critical.flags.valid = 0;
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} else if (crt > 0) {
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unsigned long crt_k = CELSIUS_TO_KELVIN(crt);
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/*
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* Allow override critical threshold
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*/
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if (crt_k > tz->trips.critical.temperature)
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printk(KERN_WARNING PREFIX
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"Critical threshold %d C\n", crt);
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tz->trips.critical.temperature = crt_k;
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}
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}
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}
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/* Critical Sleep (optional) */
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if (flag & ACPI_TRIPS_HOT) {
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status = acpi_evaluate_integer(tz->device->handle,
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"_HOT", NULL, &tmp);
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if (ACPI_FAILURE(status)) {
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tz->trips.hot.flags.valid = 0;
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ACPI_DEBUG_PRINT((ACPI_DB_INFO,
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"No hot threshold\n"));
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} else {
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tz->trips.hot.temperature = tmp;
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tz->trips.hot.flags.valid = 1;
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ACPI_DEBUG_PRINT((ACPI_DB_INFO,
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"Found hot threshold [%lu]\n",
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tz->trips.critical.temperature));
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}
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}
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/* Passive (optional) */
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if (((flag & ACPI_TRIPS_PASSIVE) && tz->trips.passive.flags.valid) ||
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(flag == ACPI_TRIPS_INIT)) {
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valid = tz->trips.passive.flags.valid;
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if (psv == -1) {
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status = AE_SUPPORT;
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} else if (psv > 0) {
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tmp = CELSIUS_TO_KELVIN(psv);
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status = AE_OK;
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} else {
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status = acpi_evaluate_integer(tz->device->handle,
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"_PSV", NULL, &tmp);
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}
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if (ACPI_FAILURE(status))
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tz->trips.passive.flags.valid = 0;
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else {
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tz->trips.passive.temperature = tmp;
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tz->trips.passive.flags.valid = 1;
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if (flag == ACPI_TRIPS_INIT) {
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status = acpi_evaluate_integer(
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tz->device->handle, "_TC1",
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NULL, &tmp);
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if (ACPI_FAILURE(status))
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tz->trips.passive.flags.valid = 0;
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else
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tz->trips.passive.tc1 = tmp;
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status = acpi_evaluate_integer(
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tz->device->handle, "_TC2",
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NULL, &tmp);
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if (ACPI_FAILURE(status))
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tz->trips.passive.flags.valid = 0;
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else
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tz->trips.passive.tc2 = tmp;
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status = acpi_evaluate_integer(
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tz->device->handle, "_TSP",
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NULL, &tmp);
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if (ACPI_FAILURE(status))
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tz->trips.passive.flags.valid = 0;
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else
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tz->trips.passive.tsp = tmp;
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}
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}
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}
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if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.passive.flags.valid) {
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memset(&devices, 0, sizeof(struct acpi_handle_list));
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status = acpi_evaluate_reference(tz->device->handle, "_PSL",
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NULL, &devices);
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if (ACPI_FAILURE(status)) {
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printk(KERN_WARNING PREFIX
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"Invalid passive threshold\n");
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tz->trips.passive.flags.valid = 0;
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}
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else
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tz->trips.passive.flags.valid = 1;
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if (memcmp(&tz->trips.passive.devices, &devices,
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sizeof(struct acpi_handle_list))) {
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memcpy(&tz->trips.passive.devices, &devices,
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sizeof(struct acpi_handle_list));
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ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device");
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}
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}
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if ((flag & ACPI_TRIPS_PASSIVE) || (flag & ACPI_TRIPS_DEVICES)) {
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if (valid != tz->trips.passive.flags.valid)
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ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state");
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}
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/* Active (optional) */
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for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
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char name[5] = { '_', 'A', 'C', ('0' + i), '\0' };
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valid = tz->trips.active[i].flags.valid;
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if (act == -1)
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break; /* disable all active trip points */
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if ((flag == ACPI_TRIPS_INIT) || ((flag & ACPI_TRIPS_ACTIVE) &&
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tz->trips.active[i].flags.valid)) {
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status = acpi_evaluate_integer(tz->device->handle,
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name, NULL, &tmp);
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if (ACPI_FAILURE(status)) {
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tz->trips.active[i].flags.valid = 0;
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if (i == 0)
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break;
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if (act <= 0)
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break;
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if (i == 1)
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tz->trips.active[0].temperature =
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CELSIUS_TO_KELVIN(act);
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else
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/*
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* Don't allow override higher than
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* the next higher trip point
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*/
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tz->trips.active[i - 1].temperature =
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(tz->trips.active[i - 2].temperature <
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CELSIUS_TO_KELVIN(act) ?
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tz->trips.active[i - 2].temperature :
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CELSIUS_TO_KELVIN(act));
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break;
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} else {
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tz->trips.active[i].temperature = tmp;
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tz->trips.active[i].flags.valid = 1;
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}
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}
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name[2] = 'L';
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if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.active[i].flags.valid ) {
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memset(&devices, 0, sizeof(struct acpi_handle_list));
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status = acpi_evaluate_reference(tz->device->handle,
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name, NULL, &devices);
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if (ACPI_FAILURE(status)) {
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printk(KERN_WARNING PREFIX
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"Invalid active%d threshold\n", i);
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tz->trips.active[i].flags.valid = 0;
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}
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else
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tz->trips.active[i].flags.valid = 1;
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if (memcmp(&tz->trips.active[i].devices, &devices,
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sizeof(struct acpi_handle_list))) {
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memcpy(&tz->trips.active[i].devices, &devices,
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sizeof(struct acpi_handle_list));
|
|
ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device");
|
|
}
|
|
}
|
|
if ((flag & ACPI_TRIPS_ACTIVE) || (flag & ACPI_TRIPS_DEVICES))
|
|
if (valid != tz->trips.active[i].flags.valid)
|
|
ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state");
|
|
|
|
if (!tz->trips.active[i].flags.valid)
|
|
break;
|
|
}
|
|
|
|
if (flag & ACPI_TRIPS_DEVICES) {
|
|
memset(&devices, 0, sizeof(struct acpi_handle_list));
|
|
status = acpi_evaluate_reference(tz->device->handle, "_TZD",
|
|
NULL, &devices);
|
|
if (memcmp(&tz->devices, &devices,
|
|
sizeof(struct acpi_handle_list))) {
|
|
memcpy(&tz->devices, &devices,
|
|
sizeof(struct acpi_handle_list));
|
|
ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device");
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int acpi_thermal_get_trip_points(struct acpi_thermal *tz)
|
|
{
|
|
int i, valid, ret = acpi_thermal_trips_update(tz, ACPI_TRIPS_INIT);
|
|
|
|
if (ret)
|
|
return ret;
|
|
|
|
valid = tz->trips.critical.flags.valid |
|
|
tz->trips.hot.flags.valid |
|
|
tz->trips.passive.flags.valid;
|
|
|
|
for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++)
|
|
valid |= tz->trips.active[i].flags.valid;
|
|
|
|
if (!valid) {
|
|
printk(KERN_WARNING FW_BUG "No valid trip found\n");
|
|
return -ENODEV;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void acpi_thermal_check(void *data)
|
|
{
|
|
struct acpi_thermal *tz = data;
|
|
|
|
if (!tz->tz_enabled) {
|
|
pr_warn("thermal zone is disabled \n");
|
|
return;
|
|
}
|
|
thermal_zone_device_update(tz->thermal_zone);
|
|
}
|
|
|
|
/* sys I/F for generic thermal sysfs support */
|
|
#define KELVIN_TO_MILLICELSIUS(t, off) (((t) - (off)) * 100)
|
|
|
|
static int thermal_get_temp(struct thermal_zone_device *thermal,
|
|
unsigned long *temp)
|
|
{
|
|
struct acpi_thermal *tz = thermal->devdata;
|
|
int result;
|
|
|
|
if (!tz)
|
|
return -EINVAL;
|
|
|
|
result = acpi_thermal_get_temperature(tz);
|
|
if (result)
|
|
return result;
|
|
|
|
*temp = KELVIN_TO_MILLICELSIUS(tz->temperature, tz->kelvin_offset);
|
|
return 0;
|
|
}
|
|
|
|
static int thermal_get_mode(struct thermal_zone_device *thermal,
|
|
enum thermal_device_mode *mode)
|
|
{
|
|
struct acpi_thermal *tz = thermal->devdata;
|
|
|
|
if (!tz)
|
|
return -EINVAL;
|
|
|
|
*mode = tz->tz_enabled ? THERMAL_DEVICE_ENABLED :
|
|
THERMAL_DEVICE_DISABLED;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int thermal_set_mode(struct thermal_zone_device *thermal,
|
|
enum thermal_device_mode mode)
|
|
{
|
|
struct acpi_thermal *tz = thermal->devdata;
|
|
int enable;
|
|
|
|
if (!tz)
|
|
return -EINVAL;
|
|
|
|
/*
|
|
* enable/disable thermal management from ACPI thermal driver
|
|
*/
|
|
if (mode == THERMAL_DEVICE_ENABLED)
|
|
enable = 1;
|
|
else if (mode == THERMAL_DEVICE_DISABLED)
|
|
enable = 0;
|
|
else
|
|
return -EINVAL;
|
|
|
|
if (enable != tz->tz_enabled) {
|
|
tz->tz_enabled = enable;
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
|
"%s kernel ACPI thermal control\n",
|
|
tz->tz_enabled ? "Enable" : "Disable"));
|
|
acpi_thermal_check(tz);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int thermal_get_trip_type(struct thermal_zone_device *thermal,
|
|
int trip, enum thermal_trip_type *type)
|
|
{
|
|
struct acpi_thermal *tz = thermal->devdata;
|
|
int i;
|
|
|
|
if (!tz || trip < 0)
|
|
return -EINVAL;
|
|
|
|
if (tz->trips.critical.flags.valid) {
|
|
if (!trip) {
|
|
*type = THERMAL_TRIP_CRITICAL;
|
|
return 0;
|
|
}
|
|
trip--;
|
|
}
|
|
|
|
if (tz->trips.hot.flags.valid) {
|
|
if (!trip) {
|
|
*type = THERMAL_TRIP_HOT;
|
|
return 0;
|
|
}
|
|
trip--;
|
|
}
|
|
|
|
if (tz->trips.passive.flags.valid) {
|
|
if (!trip) {
|
|
*type = THERMAL_TRIP_PASSIVE;
|
|
return 0;
|
|
}
|
|
trip--;
|
|
}
|
|
|
|
for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE &&
|
|
tz->trips.active[i].flags.valid; i++) {
|
|
if (!trip) {
|
|
*type = THERMAL_TRIP_ACTIVE;
|
|
return 0;
|
|
}
|
|
trip--;
|
|
}
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
static int thermal_get_trip_temp(struct thermal_zone_device *thermal,
|
|
int trip, unsigned long *temp)
|
|
{
|
|
struct acpi_thermal *tz = thermal->devdata;
|
|
int i;
|
|
|
|
if (!tz || trip < 0)
|
|
return -EINVAL;
|
|
|
|
if (tz->trips.critical.flags.valid) {
|
|
if (!trip) {
|
|
*temp = KELVIN_TO_MILLICELSIUS(
|
|
tz->trips.critical.temperature,
|
|
tz->kelvin_offset);
|
|
return 0;
|
|
}
|
|
trip--;
|
|
}
|
|
|
|
if (tz->trips.hot.flags.valid) {
|
|
if (!trip) {
|
|
*temp = KELVIN_TO_MILLICELSIUS(
|
|
tz->trips.hot.temperature,
|
|
tz->kelvin_offset);
|
|
return 0;
|
|
}
|
|
trip--;
|
|
}
|
|
|
|
if (tz->trips.passive.flags.valid) {
|
|
if (!trip) {
|
|
*temp = KELVIN_TO_MILLICELSIUS(
|
|
tz->trips.passive.temperature,
|
|
tz->kelvin_offset);
|
|
return 0;
|
|
}
|
|
trip--;
|
|
}
|
|
|
|
for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE &&
|
|
tz->trips.active[i].flags.valid; i++) {
|
|
if (!trip) {
|
|
*temp = KELVIN_TO_MILLICELSIUS(
|
|
tz->trips.active[i].temperature,
|
|
tz->kelvin_offset);
|
|
return 0;
|
|
}
|
|
trip--;
|
|
}
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
static int thermal_get_crit_temp(struct thermal_zone_device *thermal,
|
|
unsigned long *temperature) {
|
|
struct acpi_thermal *tz = thermal->devdata;
|
|
|
|
if (tz->trips.critical.flags.valid) {
|
|
*temperature = KELVIN_TO_MILLICELSIUS(
|
|
tz->trips.critical.temperature,
|
|
tz->kelvin_offset);
|
|
return 0;
|
|
} else
|
|
return -EINVAL;
|
|
}
|
|
|
|
static int thermal_get_trend(struct thermal_zone_device *thermal,
|
|
int trip, enum thermal_trend *trend)
|
|
{
|
|
struct acpi_thermal *tz = thermal->devdata;
|
|
enum thermal_trip_type type;
|
|
int i;
|
|
|
|
if (thermal_get_trip_type(thermal, trip, &type))
|
|
return -EINVAL;
|
|
|
|
if (type == THERMAL_TRIP_ACTIVE) {
|
|
/* aggressive active cooling */
|
|
*trend = THERMAL_TREND_RAISING;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* tz->temperature has already been updated by generic thermal layer,
|
|
* before this callback being invoked
|
|
*/
|
|
i = (tz->trips.passive.tc1 * (tz->temperature - tz->last_temperature))
|
|
+ (tz->trips.passive.tc2
|
|
* (tz->temperature - tz->trips.passive.temperature));
|
|
|
|
if (i > 0)
|
|
*trend = THERMAL_TREND_RAISING;
|
|
else if (i < 0)
|
|
*trend = THERMAL_TREND_DROPPING;
|
|
else
|
|
*trend = THERMAL_TREND_STABLE;
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int thermal_notify(struct thermal_zone_device *thermal, int trip,
|
|
enum thermal_trip_type trip_type)
|
|
{
|
|
u8 type = 0;
|
|
struct acpi_thermal *tz = thermal->devdata;
|
|
|
|
if (trip_type == THERMAL_TRIP_CRITICAL)
|
|
type = ACPI_THERMAL_NOTIFY_CRITICAL;
|
|
else if (trip_type == THERMAL_TRIP_HOT)
|
|
type = ACPI_THERMAL_NOTIFY_HOT;
|
|
else
|
|
return 0;
|
|
|
|
acpi_bus_generate_proc_event(tz->device, type, 1);
|
|
acpi_bus_generate_netlink_event(tz->device->pnp.device_class,
|
|
dev_name(&tz->device->dev), type, 1);
|
|
|
|
if (trip_type == THERMAL_TRIP_CRITICAL && nocrt)
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int acpi_thermal_cooling_device_cb(struct thermal_zone_device *thermal,
|
|
struct thermal_cooling_device *cdev,
|
|
bool bind)
|
|
{
|
|
struct acpi_device *device = cdev->devdata;
|
|
struct acpi_thermal *tz = thermal->devdata;
|
|
struct acpi_device *dev;
|
|
acpi_status status;
|
|
acpi_handle handle;
|
|
int i;
|
|
int j;
|
|
int trip = -1;
|
|
int result = 0;
|
|
|
|
if (tz->trips.critical.flags.valid)
|
|
trip++;
|
|
|
|
if (tz->trips.hot.flags.valid)
|
|
trip++;
|
|
|
|
if (tz->trips.passive.flags.valid) {
|
|
trip++;
|
|
for (i = 0; i < tz->trips.passive.devices.count;
|
|
i++) {
|
|
handle = tz->trips.passive.devices.handles[i];
|
|
status = acpi_bus_get_device(handle, &dev);
|
|
if (ACPI_FAILURE(status) || dev != device)
|
|
continue;
|
|
if (bind)
|
|
result =
|
|
thermal_zone_bind_cooling_device
|
|
(thermal, trip, cdev,
|
|
THERMAL_NO_LIMIT, THERMAL_NO_LIMIT);
|
|
else
|
|
result =
|
|
thermal_zone_unbind_cooling_device
|
|
(thermal, trip, cdev);
|
|
if (result)
|
|
goto failed;
|
|
}
|
|
}
|
|
|
|
for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
|
|
if (!tz->trips.active[i].flags.valid)
|
|
break;
|
|
trip++;
|
|
for (j = 0;
|
|
j < tz->trips.active[i].devices.count;
|
|
j++) {
|
|
handle = tz->trips.active[i].devices.handles[j];
|
|
status = acpi_bus_get_device(handle, &dev);
|
|
if (ACPI_FAILURE(status) || dev != device)
|
|
continue;
|
|
if (bind)
|
|
result = thermal_zone_bind_cooling_device
|
|
(thermal, trip, cdev,
|
|
THERMAL_NO_LIMIT, THERMAL_NO_LIMIT);
|
|
else
|
|
result = thermal_zone_unbind_cooling_device
|
|
(thermal, trip, cdev);
|
|
if (result)
|
|
goto failed;
|
|
}
|
|
}
|
|
|
|
for (i = 0; i < tz->devices.count; i++) {
|
|
handle = tz->devices.handles[i];
|
|
status = acpi_bus_get_device(handle, &dev);
|
|
if (ACPI_SUCCESS(status) && (dev == device)) {
|
|
if (bind)
|
|
result = thermal_zone_bind_cooling_device
|
|
(thermal, -1, cdev,
|
|
THERMAL_NO_LIMIT,
|
|
THERMAL_NO_LIMIT);
|
|
else
|
|
result = thermal_zone_unbind_cooling_device
|
|
(thermal, -1, cdev);
|
|
if (result)
|
|
goto failed;
|
|
}
|
|
}
|
|
|
|
failed:
|
|
return result;
|
|
}
|
|
|
|
static int
|
|
acpi_thermal_bind_cooling_device(struct thermal_zone_device *thermal,
|
|
struct thermal_cooling_device *cdev)
|
|
{
|
|
return acpi_thermal_cooling_device_cb(thermal, cdev, true);
|
|
}
|
|
|
|
static int
|
|
acpi_thermal_unbind_cooling_device(struct thermal_zone_device *thermal,
|
|
struct thermal_cooling_device *cdev)
|
|
{
|
|
return acpi_thermal_cooling_device_cb(thermal, cdev, false);
|
|
}
|
|
|
|
static const struct thermal_zone_device_ops acpi_thermal_zone_ops = {
|
|
.bind = acpi_thermal_bind_cooling_device,
|
|
.unbind = acpi_thermal_unbind_cooling_device,
|
|
.get_temp = thermal_get_temp,
|
|
.get_mode = thermal_get_mode,
|
|
.set_mode = thermal_set_mode,
|
|
.get_trip_type = thermal_get_trip_type,
|
|
.get_trip_temp = thermal_get_trip_temp,
|
|
.get_crit_temp = thermal_get_crit_temp,
|
|
.get_trend = thermal_get_trend,
|
|
.notify = thermal_notify,
|
|
};
|
|
|
|
static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz)
|
|
{
|
|
int trips = 0;
|
|
int result;
|
|
acpi_status status;
|
|
int i;
|
|
|
|
if (tz->trips.critical.flags.valid)
|
|
trips++;
|
|
|
|
if (tz->trips.hot.flags.valid)
|
|
trips++;
|
|
|
|
if (tz->trips.passive.flags.valid)
|
|
trips++;
|
|
|
|
for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE &&
|
|
tz->trips.active[i].flags.valid; i++, trips++);
|
|
|
|
if (tz->trips.passive.flags.valid)
|
|
tz->thermal_zone =
|
|
thermal_zone_device_register("acpitz", trips, 0, tz,
|
|
&acpi_thermal_zone_ops, NULL,
|
|
tz->trips.passive.tsp*100,
|
|
tz->polling_frequency*100);
|
|
else
|
|
tz->thermal_zone =
|
|
thermal_zone_device_register("acpitz", trips, 0, tz,
|
|
&acpi_thermal_zone_ops, NULL,
|
|
0, tz->polling_frequency*100);
|
|
if (IS_ERR(tz->thermal_zone))
|
|
return -ENODEV;
|
|
|
|
result = sysfs_create_link(&tz->device->dev.kobj,
|
|
&tz->thermal_zone->device.kobj, "thermal_zone");
|
|
if (result)
|
|
return result;
|
|
|
|
result = sysfs_create_link(&tz->thermal_zone->device.kobj,
|
|
&tz->device->dev.kobj, "device");
|
|
if (result)
|
|
return result;
|
|
|
|
status = acpi_attach_data(tz->device->handle,
|
|
acpi_bus_private_data_handler,
|
|
tz->thermal_zone);
|
|
if (ACPI_FAILURE(status)) {
|
|
printk(KERN_ERR PREFIX
|
|
"Error attaching device data\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
tz->tz_enabled = 1;
|
|
|
|
dev_info(&tz->device->dev, "registered as thermal_zone%d\n",
|
|
tz->thermal_zone->id);
|
|
return 0;
|
|
}
|
|
|
|
static void acpi_thermal_unregister_thermal_zone(struct acpi_thermal *tz)
|
|
{
|
|
sysfs_remove_link(&tz->device->dev.kobj, "thermal_zone");
|
|
sysfs_remove_link(&tz->thermal_zone->device.kobj, "device");
|
|
thermal_zone_device_unregister(tz->thermal_zone);
|
|
tz->thermal_zone = NULL;
|
|
acpi_detach_data(tz->device->handle, acpi_bus_private_data_handler);
|
|
}
|
|
|
|
|
|
/* --------------------------------------------------------------------------
|
|
Driver Interface
|
|
-------------------------------------------------------------------------- */
|
|
|
|
static void acpi_thermal_notify(struct acpi_device *device, u32 event)
|
|
{
|
|
struct acpi_thermal *tz = acpi_driver_data(device);
|
|
|
|
|
|
if (!tz)
|
|
return;
|
|
|
|
switch (event) {
|
|
case ACPI_THERMAL_NOTIFY_TEMPERATURE:
|
|
acpi_thermal_check(tz);
|
|
break;
|
|
case ACPI_THERMAL_NOTIFY_THRESHOLDS:
|
|
acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_THRESHOLDS);
|
|
acpi_thermal_check(tz);
|
|
acpi_bus_generate_proc_event(device, event, 0);
|
|
acpi_bus_generate_netlink_event(device->pnp.device_class,
|
|
dev_name(&device->dev), event, 0);
|
|
break;
|
|
case ACPI_THERMAL_NOTIFY_DEVICES:
|
|
acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_DEVICES);
|
|
acpi_thermal_check(tz);
|
|
acpi_bus_generate_proc_event(device, event, 0);
|
|
acpi_bus_generate_netlink_event(device->pnp.device_class,
|
|
dev_name(&device->dev), event, 0);
|
|
break;
|
|
default:
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
|
"Unsupported event [0x%x]\n", event));
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* On some platforms, the AML code has dependency about
|
|
* the evaluating order of _TMP and _CRT/_HOT/_PSV/_ACx.
|
|
* 1. On HP Pavilion G4-1016tx, _TMP must be invoked after
|
|
* /_CRT/_HOT/_PSV/_ACx, or else system will be power off.
|
|
* 2. On HP Compaq 6715b/6715s, the return value of _PSV is 0
|
|
* if _TMP has never been evaluated.
|
|
*
|
|
* As this dependency is totally transparent to OS, evaluate
|
|
* all of them once, in the order of _CRT/_HOT/_PSV/_ACx,
|
|
* _TMP, before they are actually used.
|
|
*/
|
|
static void acpi_thermal_aml_dependency_fix(struct acpi_thermal *tz)
|
|
{
|
|
acpi_handle handle = tz->device->handle;
|
|
unsigned long long value;
|
|
int i;
|
|
|
|
acpi_evaluate_integer(handle, "_CRT", NULL, &value);
|
|
acpi_evaluate_integer(handle, "_HOT", NULL, &value);
|
|
acpi_evaluate_integer(handle, "_PSV", NULL, &value);
|
|
for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
|
|
char name[5] = { '_', 'A', 'C', ('0' + i), '\0' };
|
|
acpi_status status;
|
|
|
|
status = acpi_evaluate_integer(handle, name, NULL, &value);
|
|
if (status == AE_NOT_FOUND)
|
|
break;
|
|
}
|
|
acpi_evaluate_integer(handle, "_TMP", NULL, &value);
|
|
}
|
|
|
|
static int acpi_thermal_get_info(struct acpi_thermal *tz)
|
|
{
|
|
int result = 0;
|
|
|
|
|
|
if (!tz)
|
|
return -EINVAL;
|
|
|
|
acpi_thermal_aml_dependency_fix(tz);
|
|
|
|
/* Get trip points [_CRT, _PSV, etc.] (required) */
|
|
result = acpi_thermal_get_trip_points(tz);
|
|
if (result)
|
|
return result;
|
|
|
|
/* Get temperature [_TMP] (required) */
|
|
result = acpi_thermal_get_temperature(tz);
|
|
if (result)
|
|
return result;
|
|
|
|
/* Set the cooling mode [_SCP] to active cooling (default) */
|
|
result = acpi_thermal_set_cooling_mode(tz, ACPI_THERMAL_MODE_ACTIVE);
|
|
if (!result)
|
|
tz->flags.cooling_mode = 1;
|
|
|
|
/* Get default polling frequency [_TZP] (optional) */
|
|
if (tzp)
|
|
tz->polling_frequency = tzp;
|
|
else
|
|
acpi_thermal_get_polling_frequency(tz);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* The exact offset between Kelvin and degree Celsius is 273.15. However ACPI
|
|
* handles temperature values with a single decimal place. As a consequence,
|
|
* some implementations use an offset of 273.1 and others use an offset of
|
|
* 273.2. Try to find out which one is being used, to present the most
|
|
* accurate and visually appealing number.
|
|
*
|
|
* The heuristic below should work for all ACPI thermal zones which have a
|
|
* critical trip point with a value being a multiple of 0.5 degree Celsius.
|
|
*/
|
|
static void acpi_thermal_guess_offset(struct acpi_thermal *tz)
|
|
{
|
|
if (tz->trips.critical.flags.valid &&
|
|
(tz->trips.critical.temperature % 5) == 1)
|
|
tz->kelvin_offset = 2731;
|
|
else
|
|
tz->kelvin_offset = 2732;
|
|
}
|
|
|
|
static int acpi_thermal_add(struct acpi_device *device)
|
|
{
|
|
int result = 0;
|
|
struct acpi_thermal *tz = NULL;
|
|
|
|
|
|
if (!device)
|
|
return -EINVAL;
|
|
|
|
tz = kzalloc(sizeof(struct acpi_thermal), GFP_KERNEL);
|
|
if (!tz)
|
|
return -ENOMEM;
|
|
|
|
tz->device = device;
|
|
strcpy(tz->name, device->pnp.bus_id);
|
|
strcpy(acpi_device_name(device), ACPI_THERMAL_DEVICE_NAME);
|
|
strcpy(acpi_device_class(device), ACPI_THERMAL_CLASS);
|
|
device->driver_data = tz;
|
|
mutex_init(&tz->lock);
|
|
|
|
|
|
result = acpi_thermal_get_info(tz);
|
|
if (result)
|
|
goto free_memory;
|
|
|
|
acpi_thermal_guess_offset(tz);
|
|
|
|
result = acpi_thermal_register_thermal_zone(tz);
|
|
if (result)
|
|
goto free_memory;
|
|
|
|
printk(KERN_INFO PREFIX "%s [%s] (%ld C)\n",
|
|
acpi_device_name(device), acpi_device_bid(device),
|
|
KELVIN_TO_CELSIUS(tz->temperature));
|
|
goto end;
|
|
|
|
free_memory:
|
|
kfree(tz);
|
|
end:
|
|
return result;
|
|
}
|
|
|
|
static int acpi_thermal_remove(struct acpi_device *device)
|
|
{
|
|
struct acpi_thermal *tz = NULL;
|
|
|
|
if (!device || !acpi_driver_data(device))
|
|
return -EINVAL;
|
|
|
|
tz = acpi_driver_data(device);
|
|
|
|
acpi_thermal_unregister_thermal_zone(tz);
|
|
mutex_destroy(&tz->lock);
|
|
kfree(tz);
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
static int acpi_thermal_resume(struct device *dev)
|
|
{
|
|
struct acpi_thermal *tz;
|
|
int i, j, power_state, result;
|
|
|
|
if (!dev)
|
|
return -EINVAL;
|
|
|
|
tz = acpi_driver_data(to_acpi_device(dev));
|
|
if (!tz)
|
|
return -EINVAL;
|
|
|
|
for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
|
|
if (!(&tz->trips.active[i]))
|
|
break;
|
|
if (!tz->trips.active[i].flags.valid)
|
|
break;
|
|
tz->trips.active[i].flags.enabled = 1;
|
|
for (j = 0; j < tz->trips.active[i].devices.count; j++) {
|
|
result = acpi_bus_update_power(
|
|
tz->trips.active[i].devices.handles[j],
|
|
&power_state);
|
|
if (result || (power_state != ACPI_STATE_D0)) {
|
|
tz->trips.active[i].flags.enabled = 0;
|
|
break;
|
|
}
|
|
}
|
|
tz->state.active |= tz->trips.active[i].flags.enabled;
|
|
}
|
|
|
|
acpi_thermal_check(tz);
|
|
|
|
return AE_OK;
|
|
}
|
|
#endif
|
|
|
|
static int thermal_act(const struct dmi_system_id *d) {
|
|
|
|
if (act == 0) {
|
|
printk(KERN_NOTICE "ACPI: %s detected: "
|
|
"disabling all active thermal trip points\n", d->ident);
|
|
act = -1;
|
|
}
|
|
return 0;
|
|
}
|
|
static int thermal_nocrt(const struct dmi_system_id *d) {
|
|
|
|
printk(KERN_NOTICE "ACPI: %s detected: "
|
|
"disabling all critical thermal trip point actions.\n", d->ident);
|
|
nocrt = 1;
|
|
return 0;
|
|
}
|
|
static int thermal_tzp(const struct dmi_system_id *d) {
|
|
|
|
if (tzp == 0) {
|
|
printk(KERN_NOTICE "ACPI: %s detected: "
|
|
"enabling thermal zone polling\n", d->ident);
|
|
tzp = 300; /* 300 dS = 30 Seconds */
|
|
}
|
|
return 0;
|
|
}
|
|
static int thermal_psv(const struct dmi_system_id *d) {
|
|
|
|
if (psv == 0) {
|
|
printk(KERN_NOTICE "ACPI: %s detected: "
|
|
"disabling all passive thermal trip points\n", d->ident);
|
|
psv = -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static struct dmi_system_id thermal_dmi_table[] __initdata = {
|
|
/*
|
|
* Award BIOS on this AOpen makes thermal control almost worthless.
|
|
* http://bugzilla.kernel.org/show_bug.cgi?id=8842
|
|
*/
|
|
{
|
|
.callback = thermal_act,
|
|
.ident = "AOpen i915GMm-HFS",
|
|
.matches = {
|
|
DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
|
|
DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
|
|
},
|
|
},
|
|
{
|
|
.callback = thermal_psv,
|
|
.ident = "AOpen i915GMm-HFS",
|
|
.matches = {
|
|
DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
|
|
DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
|
|
},
|
|
},
|
|
{
|
|
.callback = thermal_tzp,
|
|
.ident = "AOpen i915GMm-HFS",
|
|
.matches = {
|
|
DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
|
|
DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
|
|
},
|
|
},
|
|
{
|
|
.callback = thermal_nocrt,
|
|
.ident = "Gigabyte GA-7ZX",
|
|
.matches = {
|
|
DMI_MATCH(DMI_BOARD_VENDOR, "Gigabyte Technology Co., Ltd."),
|
|
DMI_MATCH(DMI_BOARD_NAME, "7ZX"),
|
|
},
|
|
},
|
|
{}
|
|
};
|
|
|
|
static int __init acpi_thermal_init(void)
|
|
{
|
|
int result = 0;
|
|
|
|
dmi_check_system(thermal_dmi_table);
|
|
|
|
if (off) {
|
|
printk(KERN_NOTICE "ACPI: thermal control disabled\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
result = acpi_bus_register_driver(&acpi_thermal_driver);
|
|
if (result < 0)
|
|
return -ENODEV;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void __exit acpi_thermal_exit(void)
|
|
{
|
|
|
|
acpi_bus_unregister_driver(&acpi_thermal_driver);
|
|
|
|
return;
|
|
}
|
|
|
|
module_init(acpi_thermal_init);
|
|
module_exit(acpi_thermal_exit);
|