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1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
1446 lines
37 KiB
C
1446 lines
37 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/init.h>
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#include <linux/types.h>
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#include <linux/proc_fs.h>
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#include <linux/sched.h>
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#include <linux/kmod.h>
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#include <linux/seq_file.h>
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#include <asm/uaccess.h>
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#include <acpi/acpi_bus.h>
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#include <acpi/acpi_drivers.h>
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#define ACPI_THERMAL_COMPONENT 0x04000000
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#define ACPI_THERMAL_CLASS "thermal_zone"
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#define ACPI_THERMAL_DRIVER_NAME "ACPI Thermal Zone Driver"
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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_MODE_PASSIVE 0x01
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#define ACPI_THERMAL_MODE_CRITICAL 0xff
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#define ACPI_THERMAL_PATH_POWEROFF "/sbin/poweroff"
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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 KELVIN_TO_CELSIUS(t) (long)(((long)t-2732>=0) ? ((long)t-2732+5)/10 : ((long)t-2732-5)/10)
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#define CELSIUS_TO_KELVIN(t) ((t+273)*10)
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#define _COMPONENT ACPI_THERMAL_COMPONENT
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ACPI_MODULE_NAME ("acpi_thermal")
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MODULE_AUTHOR("Paul Diefenbaugh");
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MODULE_DESCRIPTION(ACPI_THERMAL_DRIVER_NAME);
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MODULE_LICENSE("GPL");
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static int tzp;
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module_param(tzp, int, 0);
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MODULE_PARM_DESC(tzp, "Thermal zone polling frequency, in 1/10 seconds.\n");
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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, int type);
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static int acpi_thermal_state_open_fs(struct inode *inode, struct file *file);
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static int acpi_thermal_temp_open_fs(struct inode *inode, struct file *file);
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static int acpi_thermal_trip_open_fs(struct inode *inode, struct file *file);
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static ssize_t acpi_thermal_write_trip_points (struct file*,const char __user *,size_t,loff_t *);
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static int acpi_thermal_cooling_open_fs(struct inode *inode, struct file *file);
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static ssize_t acpi_thermal_write_cooling_mode (struct file*,const char __user *,size_t,loff_t *);
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static int acpi_thermal_polling_open_fs(struct inode *inode, struct file *file);
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static ssize_t acpi_thermal_write_polling(struct file*,const char __user *,size_t,loff_t *);
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static struct acpi_driver acpi_thermal_driver = {
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.name = ACPI_THERMAL_DRIVER_NAME,
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.class = ACPI_THERMAL_CLASS,
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.ids = ACPI_THERMAL_HID,
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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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},
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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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acpi_handle handle;
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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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u8 cooling_mode;
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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 timer_list timer;
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};
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static struct file_operations acpi_thermal_state_fops = {
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.open = acpi_thermal_state_open_fs,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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static struct file_operations acpi_thermal_temp_fops = {
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.open = acpi_thermal_temp_open_fs,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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static struct file_operations acpi_thermal_trip_fops = {
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.open = acpi_thermal_trip_open_fs,
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.read = seq_read,
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.write = acpi_thermal_write_trip_points,
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.llseek = seq_lseek,
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.release = single_release,
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};
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static struct file_operations acpi_thermal_cooling_fops = {
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.open = acpi_thermal_cooling_open_fs,
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.read = seq_read,
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.write = acpi_thermal_write_cooling_mode,
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.llseek = seq_lseek,
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.release = single_release,
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};
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static struct file_operations acpi_thermal_polling_fops = {
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.open = acpi_thermal_polling_open_fs,
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.read = seq_read,
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.write = acpi_thermal_write_polling,
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.llseek = seq_lseek,
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.release = single_release,
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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
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acpi_thermal_get_temperature (
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struct acpi_thermal *tz)
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{
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acpi_status status = AE_OK;
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ACPI_FUNCTION_TRACE("acpi_thermal_get_temperature");
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if (!tz)
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return_VALUE(-EINVAL);
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tz->last_temperature = tz->temperature;
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status = acpi_evaluate_integer(tz->handle, "_TMP", NULL, &tz->temperature);
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if (ACPI_FAILURE(status))
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return_VALUE(-ENODEV);
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ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Temperature is %lu dK\n", tz->temperature));
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return_VALUE(0);
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}
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static int
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acpi_thermal_get_polling_frequency (
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struct acpi_thermal *tz)
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{
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acpi_status status = AE_OK;
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ACPI_FUNCTION_TRACE("acpi_thermal_get_polling_frequency");
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if (!tz)
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return_VALUE(-EINVAL);
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status = acpi_evaluate_integer(tz->handle, "_TZP", NULL, &tz->polling_frequency);
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if (ACPI_FAILURE(status))
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return_VALUE(-ENODEV);
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ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Polling frequency is %lu dS\n", tz->polling_frequency));
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return_VALUE(0);
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}
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static int
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acpi_thermal_set_polling (
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struct acpi_thermal *tz,
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int seconds)
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{
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ACPI_FUNCTION_TRACE("acpi_thermal_set_polling");
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if (!tz)
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return_VALUE(-EINVAL);
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tz->polling_frequency = seconds * 10; /* Convert value to deci-seconds */
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ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Polling frequency set to %lu seconds\n", tz->polling_frequency));
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return_VALUE(0);
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}
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static int
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acpi_thermal_set_cooling_mode (
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struct acpi_thermal *tz,
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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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ACPI_FUNCTION_TRACE("acpi_thermal_set_cooling_mode");
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if (!tz)
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return_VALUE(-EINVAL);
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status = acpi_get_handle(tz->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_VALUE(-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_VALUE(-ENODEV);
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tz->cooling_mode = mode;
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ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Cooling mode [%s]\n",
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mode?"passive":"active"));
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return_VALUE(0);
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}
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static int
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acpi_thermal_get_trip_points (
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struct acpi_thermal *tz)
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{
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acpi_status status = AE_OK;
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int i = 0;
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ACPI_FUNCTION_TRACE("acpi_thermal_get_trip_points");
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if (!tz)
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return_VALUE(-EINVAL);
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/* Critical Shutdown (required) */
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status = acpi_evaluate_integer(tz->handle, "_CRT", NULL,
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&tz->trips.critical.temperature);
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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_ERROR, "No critical threshold\n"));
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return_VALUE(-ENODEV);
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}
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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, "Found critical threshold [%lu]\n", tz->trips.critical.temperature));
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}
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/* Critical Sleep (optional) */
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status = acpi_evaluate_integer(tz->handle, "_HOT", NULL, &tz->trips.hot.temperature);
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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, "No hot threshold\n"));
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}
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else {
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tz->trips.hot.flags.valid = 1;
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ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found hot threshold [%lu]\n", tz->trips.hot.temperature));
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}
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/* Passive: Processors (optional) */
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status = acpi_evaluate_integer(tz->handle, "_PSV", NULL, &tz->trips.passive.temperature);
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if (ACPI_FAILURE(status)) {
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tz->trips.passive.flags.valid = 0;
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ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No passive threshold\n"));
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}
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else {
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tz->trips.passive.flags.valid = 1;
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status = acpi_evaluate_integer(tz->handle, "_TC1", NULL, &tz->trips.passive.tc1);
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if (ACPI_FAILURE(status))
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tz->trips.passive.flags.valid = 0;
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status = acpi_evaluate_integer(tz->handle, "_TC2", NULL, &tz->trips.passive.tc2);
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if (ACPI_FAILURE(status))
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tz->trips.passive.flags.valid = 0;
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status = acpi_evaluate_integer(tz->handle, "_TSP", NULL, &tz->trips.passive.tsp);
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if (ACPI_FAILURE(status))
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tz->trips.passive.flags.valid = 0;
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status = acpi_evaluate_reference(tz->handle, "_PSL", NULL, &tz->trips.passive.devices);
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if (ACPI_FAILURE(status))
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tz->trips.passive.flags.valid = 0;
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if (!tz->trips.passive.flags.valid)
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ACPI_DEBUG_PRINT((ACPI_DB_WARN, "Invalid passive threshold\n"));
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else
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ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found passive threshold [%lu]\n", tz->trips.passive.temperature));
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}
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/* Active: Fans, etc. (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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status = acpi_evaluate_integer(tz->handle, name, NULL, &tz->trips.active[i].temperature);
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if (ACPI_FAILURE(status))
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break;
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name[2] = 'L';
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status = acpi_evaluate_reference(tz->handle, name, NULL, &tz->trips.active[i].devices);
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if (ACPI_SUCCESS(status)) {
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tz->trips.active[i].flags.valid = 1;
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ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found active threshold [%d]:[%lu]\n", i, tz->trips.active[i].temperature));
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}
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else
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ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid active threshold [%d]\n", i));
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}
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return_VALUE(0);
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}
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static int
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acpi_thermal_get_devices (
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struct acpi_thermal *tz)
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{
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acpi_status status = AE_OK;
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ACPI_FUNCTION_TRACE("acpi_thermal_get_devices");
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if (!tz)
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return_VALUE(-EINVAL);
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status = acpi_evaluate_reference(tz->handle, "_TZD", NULL, &tz->devices);
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if (ACPI_FAILURE(status))
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return_VALUE(-ENODEV);
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return_VALUE(0);
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}
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static int
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acpi_thermal_call_usermode (
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char *path)
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{
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char *argv[2] = {NULL, NULL};
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char *envp[3] = {NULL, NULL, NULL};
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ACPI_FUNCTION_TRACE("acpi_thermal_call_usermode");
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if (!path)
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return_VALUE(-EINVAL);
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argv[0] = path;
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/* minimal command environment */
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envp[0] = "HOME=/";
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envp[1] = "PATH=/sbin:/bin:/usr/sbin:/usr/bin";
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call_usermodehelper(argv[0], argv, envp, 0);
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return_VALUE(0);
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}
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static int
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acpi_thermal_critical (
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struct acpi_thermal *tz)
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{
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int result = 0;
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struct acpi_device *device = NULL;
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ACPI_FUNCTION_TRACE("acpi_thermal_critical");
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if (!tz || !tz->trips.critical.flags.valid)
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return_VALUE(-EINVAL);
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if (tz->temperature >= tz->trips.critical.temperature) {
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ACPI_DEBUG_PRINT((ACPI_DB_WARN, "Critical trip point\n"));
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tz->trips.critical.flags.enabled = 1;
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}
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else if (tz->trips.critical.flags.enabled)
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tz->trips.critical.flags.enabled = 0;
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result = acpi_bus_get_device(tz->handle, &device);
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if (result)
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return_VALUE(result);
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printk(KERN_EMERG "Critical temperature reached (%ld C), shutting down.\n", KELVIN_TO_CELSIUS(tz->temperature));
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acpi_bus_generate_event(device, ACPI_THERMAL_NOTIFY_CRITICAL, tz->trips.critical.flags.enabled);
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acpi_thermal_call_usermode(ACPI_THERMAL_PATH_POWEROFF);
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return_VALUE(0);
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}
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static int
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acpi_thermal_hot (
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struct acpi_thermal *tz)
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{
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int result = 0;
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struct acpi_device *device = NULL;
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ACPI_FUNCTION_TRACE("acpi_thermal_hot");
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if (!tz || !tz->trips.hot.flags.valid)
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return_VALUE(-EINVAL);
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if (tz->temperature >= tz->trips.hot.temperature) {
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ACPI_DEBUG_PRINT((ACPI_DB_WARN, "Hot trip point\n"));
|
|
tz->trips.hot.flags.enabled = 1;
|
|
}
|
|
else if (tz->trips.hot.flags.enabled)
|
|
tz->trips.hot.flags.enabled = 0;
|
|
|
|
result = acpi_bus_get_device(tz->handle, &device);
|
|
if (result)
|
|
return_VALUE(result);
|
|
|
|
acpi_bus_generate_event(device, ACPI_THERMAL_NOTIFY_HOT, tz->trips.hot.flags.enabled);
|
|
|
|
/* TBD: Call user-mode "sleep(S4)" function */
|
|
|
|
return_VALUE(0);
|
|
}
|
|
|
|
|
|
static int
|
|
acpi_thermal_passive (
|
|
struct acpi_thermal *tz)
|
|
{
|
|
int result = 0;
|
|
struct acpi_thermal_passive *passive = NULL;
|
|
int trend = 0;
|
|
int i = 0;
|
|
|
|
ACPI_FUNCTION_TRACE("acpi_thermal_passive");
|
|
|
|
if (!tz || !tz->trips.passive.flags.valid)
|
|
return_VALUE(-EINVAL);
|
|
|
|
passive = &(tz->trips.passive);
|
|
|
|
/*
|
|
* Above Trip?
|
|
* -----------
|
|
* Calculate the thermal trend (using the passive cooling equation)
|
|
* and modify the performance limit for all passive cooling devices
|
|
* accordingly. Note that we assume symmetry.
|
|
*/
|
|
if (tz->temperature >= passive->temperature) {
|
|
trend = (passive->tc1 * (tz->temperature - tz->last_temperature)) + (passive->tc2 * (tz->temperature - passive->temperature));
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
|
"trend[%d]=(tc1[%lu]*(tmp[%lu]-last[%lu]))+(tc2[%lu]*(tmp[%lu]-psv[%lu]))\n",
|
|
trend, passive->tc1, tz->temperature,
|
|
tz->last_temperature, passive->tc2,
|
|
tz->temperature, passive->temperature));
|
|
tz->trips.passive.flags.enabled = 1;
|
|
/* Heating up? */
|
|
if (trend > 0)
|
|
for (i=0; i<passive->devices.count; i++)
|
|
acpi_processor_set_thermal_limit(
|
|
passive->devices.handles[i],
|
|
ACPI_PROCESSOR_LIMIT_INCREMENT);
|
|
/* Cooling off? */
|
|
else if (trend < 0)
|
|
for (i=0; i<passive->devices.count; i++)
|
|
acpi_processor_set_thermal_limit(
|
|
passive->devices.handles[i],
|
|
ACPI_PROCESSOR_LIMIT_DECREMENT);
|
|
}
|
|
|
|
/*
|
|
* Below Trip?
|
|
* -----------
|
|
* Implement passive cooling hysteresis to slowly increase performance
|
|
* and avoid thrashing around the passive trip point. Note that we
|
|
* assume symmetry.
|
|
*/
|
|
else if (tz->trips.passive.flags.enabled) {
|
|
for (i=0; i<passive->devices.count; i++)
|
|
result = acpi_processor_set_thermal_limit(
|
|
passive->devices.handles[i],
|
|
ACPI_PROCESSOR_LIMIT_DECREMENT);
|
|
if (result == 1) {
|
|
tz->trips.passive.flags.enabled = 0;
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
|
"Disabling passive cooling (zone is cool)\n"));
|
|
}
|
|
}
|
|
|
|
return_VALUE(0);
|
|
}
|
|
|
|
|
|
static int
|
|
acpi_thermal_active (
|
|
struct acpi_thermal *tz)
|
|
{
|
|
int result = 0;
|
|
struct acpi_thermal_active *active = NULL;
|
|
int i = 0;
|
|
int j = 0;
|
|
unsigned long maxtemp = 0;
|
|
|
|
ACPI_FUNCTION_TRACE("acpi_thermal_active");
|
|
|
|
if (!tz)
|
|
return_VALUE(-EINVAL);
|
|
|
|
for (i=0; i<ACPI_THERMAL_MAX_ACTIVE; i++) {
|
|
|
|
active = &(tz->trips.active[i]);
|
|
if (!active || !active->flags.valid)
|
|
break;
|
|
|
|
/*
|
|
* Above Threshold?
|
|
* ----------------
|
|
* If not already enabled, turn ON all cooling devices
|
|
* associated with this active threshold.
|
|
*/
|
|
if (tz->temperature >= active->temperature) {
|
|
if (active->temperature > maxtemp)
|
|
tz->state.active_index = i, maxtemp = active->temperature;
|
|
if (!active->flags.enabled) {
|
|
for (j = 0; j < active->devices.count; j++) {
|
|
result = acpi_bus_set_power(active->devices.handles[j], ACPI_STATE_D0);
|
|
if (result) {
|
|
ACPI_DEBUG_PRINT((ACPI_DB_WARN, "Unable to turn cooling device [%p] 'on'\n", active->devices.handles[j]));
|
|
continue;
|
|
}
|
|
active->flags.enabled = 1;
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Cooling device [%p] now 'on'\n", active->devices.handles[j]));
|
|
}
|
|
}
|
|
}
|
|
/*
|
|
* Below Threshold?
|
|
* ----------------
|
|
* Turn OFF all cooling devices associated with this
|
|
* threshold.
|
|
*/
|
|
else if (active->flags.enabled) {
|
|
for (j = 0; j < active->devices.count; j++) {
|
|
result = acpi_bus_set_power(active->devices.handles[j], ACPI_STATE_D3);
|
|
if (result) {
|
|
ACPI_DEBUG_PRINT((ACPI_DB_WARN, "Unable to turn cooling device [%p] 'off'\n", active->devices.handles[j]));
|
|
continue;
|
|
}
|
|
active->flags.enabled = 0;
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Cooling device [%p] now 'off'\n", active->devices.handles[j]));
|
|
}
|
|
}
|
|
}
|
|
|
|
return_VALUE(0);
|
|
}
|
|
|
|
|
|
static void acpi_thermal_check (void *context);
|
|
|
|
static void
|
|
acpi_thermal_run (
|
|
unsigned long data)
|
|
{
|
|
struct acpi_thermal *tz = (struct acpi_thermal *)data;
|
|
if (!tz->zombie)
|
|
acpi_os_queue_for_execution(OSD_PRIORITY_GPE,
|
|
acpi_thermal_check, (void *) data);
|
|
}
|
|
|
|
|
|
static void
|
|
acpi_thermal_check (
|
|
void *data)
|
|
{
|
|
int result = 0;
|
|
struct acpi_thermal *tz = (struct acpi_thermal *) data;
|
|
unsigned long sleep_time = 0;
|
|
int i = 0;
|
|
struct acpi_thermal_state state;
|
|
|
|
ACPI_FUNCTION_TRACE("acpi_thermal_check");
|
|
|
|
if (!tz) {
|
|
ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid (NULL) context.\n"));
|
|
return_VOID;
|
|
}
|
|
|
|
state = tz->state;
|
|
|
|
result = acpi_thermal_get_temperature(tz);
|
|
if (result)
|
|
return_VOID;
|
|
|
|
memset(&tz->state, 0, sizeof(tz->state));
|
|
|
|
/*
|
|
* Check Trip Points
|
|
* -----------------
|
|
* Compare the current temperature to the trip point values to see
|
|
* if we've entered one of the thermal policy states. Note that
|
|
* this function determines when a state is entered, but the
|
|
* individual policy decides when it is exited (e.g. hysteresis).
|
|
*/
|
|
if (tz->trips.critical.flags.valid)
|
|
state.critical |= (tz->temperature >= tz->trips.critical.temperature);
|
|
if (tz->trips.hot.flags.valid)
|
|
state.hot |= (tz->temperature >= tz->trips.hot.temperature);
|
|
if (tz->trips.passive.flags.valid)
|
|
state.passive |= (tz->temperature >= tz->trips.passive.temperature);
|
|
for (i=0; i<ACPI_THERMAL_MAX_ACTIVE; i++)
|
|
if (tz->trips.active[i].flags.valid)
|
|
state.active |= (tz->temperature >= tz->trips.active[i].temperature);
|
|
|
|
/*
|
|
* Invoke Policy
|
|
* -------------
|
|
* Separated from the above check to allow individual policy to
|
|
* determine when to exit a given state.
|
|
*/
|
|
if (state.critical)
|
|
acpi_thermal_critical(tz);
|
|
if (state.hot)
|
|
acpi_thermal_hot(tz);
|
|
if (state.passive)
|
|
acpi_thermal_passive(tz);
|
|
if (state.active)
|
|
acpi_thermal_active(tz);
|
|
|
|
/*
|
|
* Calculate State
|
|
* ---------------
|
|
* Again, separated from the above two to allow independent policy
|
|
* decisions.
|
|
*/
|
|
if (tz->trips.critical.flags.enabled)
|
|
tz->state.critical = 1;
|
|
if (tz->trips.hot.flags.enabled)
|
|
tz->state.hot = 1;
|
|
if (tz->trips.passive.flags.enabled)
|
|
tz->state.passive = 1;
|
|
for (i=0; i<ACPI_THERMAL_MAX_ACTIVE; i++)
|
|
if (tz->trips.active[i].flags.enabled)
|
|
tz->state.active = 1;
|
|
|
|
/*
|
|
* Calculate Sleep Time
|
|
* --------------------
|
|
* If we're in the passive state, use _TSP's value. Otherwise
|
|
* use the default polling frequency (e.g. _TZP). If no polling
|
|
* frequency is specified then we'll wait forever (at least until
|
|
* a thermal event occurs). Note that _TSP and _TZD values are
|
|
* given in 1/10th seconds (we must covert to milliseconds).
|
|
*/
|
|
if (tz->state.passive)
|
|
sleep_time = tz->trips.passive.tsp * 100;
|
|
else if (tz->polling_frequency > 0)
|
|
sleep_time = tz->polling_frequency * 100;
|
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "%s: temperature[%lu] sleep[%lu]\n",
|
|
tz->name, tz->temperature, sleep_time));
|
|
|
|
/*
|
|
* Schedule Next Poll
|
|
* ------------------
|
|
*/
|
|
if (!sleep_time) {
|
|
if (timer_pending(&(tz->timer)))
|
|
del_timer(&(tz->timer));
|
|
}
|
|
else {
|
|
if (timer_pending(&(tz->timer)))
|
|
mod_timer(&(tz->timer), (HZ * sleep_time) / 1000);
|
|
else {
|
|
tz->timer.data = (unsigned long) tz;
|
|
tz->timer.function = acpi_thermal_run;
|
|
tz->timer.expires = jiffies + (HZ * sleep_time) / 1000;
|
|
add_timer(&(tz->timer));
|
|
}
|
|
}
|
|
|
|
return_VOID;
|
|
}
|
|
|
|
|
|
/* --------------------------------------------------------------------------
|
|
FS Interface (/proc)
|
|
-------------------------------------------------------------------------- */
|
|
|
|
static struct proc_dir_entry *acpi_thermal_dir;
|
|
|
|
static int acpi_thermal_state_seq_show(struct seq_file *seq, void *offset)
|
|
{
|
|
struct acpi_thermal *tz = (struct acpi_thermal *)seq->private;
|
|
|
|
ACPI_FUNCTION_TRACE("acpi_thermal_state_seq_show");
|
|
|
|
if (!tz)
|
|
goto end;
|
|
|
|
seq_puts(seq, "state: ");
|
|
|
|
if (!tz->state.critical && !tz->state.hot && !tz->state.passive && !tz->state.active)
|
|
seq_puts(seq, "ok\n");
|
|
else {
|
|
if (tz->state.critical)
|
|
seq_puts(seq, "critical ");
|
|
if (tz->state.hot)
|
|
seq_puts(seq, "hot ");
|
|
if (tz->state.passive)
|
|
seq_puts(seq, "passive ");
|
|
if (tz->state.active)
|
|
seq_printf(seq, "active[%d]", tz->state.active_index);
|
|
seq_puts(seq, "\n");
|
|
}
|
|
|
|
end:
|
|
return_VALUE(0);
|
|
}
|
|
|
|
static int acpi_thermal_state_open_fs(struct inode *inode, struct file *file)
|
|
{
|
|
return single_open(file, acpi_thermal_state_seq_show, PDE(inode)->data);
|
|
}
|
|
|
|
|
|
static int acpi_thermal_temp_seq_show(struct seq_file *seq, void *offset)
|
|
{
|
|
int result = 0;
|
|
struct acpi_thermal *tz = (struct acpi_thermal *)seq->private;
|
|
|
|
ACPI_FUNCTION_TRACE("acpi_thermal_temp_seq_show");
|
|
|
|
if (!tz)
|
|
goto end;
|
|
|
|
result = acpi_thermal_get_temperature(tz);
|
|
if (result)
|
|
goto end;
|
|
|
|
seq_printf(seq, "temperature: %ld C\n",
|
|
KELVIN_TO_CELSIUS(tz->temperature));
|
|
|
|
end:
|
|
return_VALUE(0);
|
|
}
|
|
|
|
static int acpi_thermal_temp_open_fs(struct inode *inode, struct file *file)
|
|
{
|
|
return single_open(file, acpi_thermal_temp_seq_show, PDE(inode)->data);
|
|
}
|
|
|
|
|
|
static int acpi_thermal_trip_seq_show(struct seq_file *seq, void *offset)
|
|
{
|
|
struct acpi_thermal *tz = (struct acpi_thermal *)seq->private;
|
|
int i = 0;
|
|
int j = 0;
|
|
|
|
ACPI_FUNCTION_TRACE("acpi_thermal_trip_seq_show");
|
|
|
|
if (!tz)
|
|
goto end;
|
|
|
|
if (tz->trips.critical.flags.valid)
|
|
seq_printf(seq, "critical (S5): %ld C\n",
|
|
KELVIN_TO_CELSIUS(tz->trips.critical.temperature));
|
|
|
|
if (tz->trips.hot.flags.valid)
|
|
seq_printf(seq, "hot (S4): %ld C\n",
|
|
KELVIN_TO_CELSIUS(tz->trips.hot.temperature));
|
|
|
|
if (tz->trips.passive.flags.valid) {
|
|
seq_printf(seq, "passive: %ld C: tc1=%lu tc2=%lu tsp=%lu devices=",
|
|
KELVIN_TO_CELSIUS(tz->trips.passive.temperature),
|
|
tz->trips.passive.tc1,
|
|
tz->trips.passive.tc2,
|
|
tz->trips.passive.tsp);
|
|
for (j=0; j<tz->trips.passive.devices.count; j++) {
|
|
|
|
seq_printf(seq, "0x%p ", tz->trips.passive.devices.handles[j]);
|
|
}
|
|
seq_puts(seq, "\n");
|
|
}
|
|
|
|
for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
|
|
if (!(tz->trips.active[i].flags.valid))
|
|
break;
|
|
seq_printf(seq, "active[%d]: %ld C: devices=",
|
|
i, KELVIN_TO_CELSIUS(tz->trips.active[i].temperature));
|
|
for (j = 0; j < tz->trips.active[i].devices.count; j++)
|
|
seq_printf(seq, "0x%p ",
|
|
tz->trips.active[i].devices.handles[j]);
|
|
seq_puts(seq, "\n");
|
|
}
|
|
|
|
end:
|
|
return_VALUE(0);
|
|
}
|
|
|
|
static int acpi_thermal_trip_open_fs(struct inode *inode, struct file *file)
|
|
{
|
|
return single_open(file, acpi_thermal_trip_seq_show, PDE(inode)->data);
|
|
}
|
|
|
|
static ssize_t
|
|
acpi_thermal_write_trip_points (
|
|
struct file *file,
|
|
const char __user *buffer,
|
|
size_t count,
|
|
loff_t *ppos)
|
|
{
|
|
struct seq_file *m = (struct seq_file *)file->private_data;
|
|
struct acpi_thermal *tz = (struct acpi_thermal *)m->private;
|
|
|
|
char *limit_string;
|
|
int num, critical, hot, passive;
|
|
int *active;
|
|
int i = 0;
|
|
|
|
ACPI_FUNCTION_TRACE("acpi_thermal_write_trip_points");
|
|
|
|
limit_string = kmalloc(ACPI_THERMAL_MAX_LIMIT_STR_LEN, GFP_KERNEL);
|
|
if(!limit_string)
|
|
return_VALUE(-ENOMEM);
|
|
|
|
memset(limit_string, 0, ACPI_THERMAL_MAX_LIMIT_STR_LEN);
|
|
|
|
active = kmalloc(ACPI_THERMAL_MAX_ACTIVE *sizeof(int), GFP_KERNEL);
|
|
if(!active)
|
|
return_VALUE(-ENOMEM);
|
|
|
|
if (!tz || (count > ACPI_THERMAL_MAX_LIMIT_STR_LEN - 1)) {
|
|
ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid argument\n"));
|
|
count = -EINVAL;
|
|
goto end;
|
|
}
|
|
|
|
if (copy_from_user(limit_string, buffer, count)) {
|
|
ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid data\n"));
|
|
count = -EFAULT;
|
|
goto end;
|
|
}
|
|
|
|
limit_string[count] = '\0';
|
|
|
|
num = sscanf(limit_string, "%d:%d:%d:%d:%d:%d:%d:%d:%d:%d:%d:%d:%d",
|
|
&critical, &hot, &passive,
|
|
&active[0], &active[1], &active[2], &active[3], &active[4],
|
|
&active[5], &active[6], &active[7], &active[8], &active[9]);
|
|
if(!(num >=5 && num < (ACPI_THERMAL_MAX_ACTIVE + 3))) {
|
|
ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid data format\n"));
|
|
count = -EINVAL;
|
|
goto end;
|
|
}
|
|
|
|
tz->trips.critical.temperature = CELSIUS_TO_KELVIN(critical);
|
|
tz->trips.hot.temperature = CELSIUS_TO_KELVIN(hot);
|
|
tz->trips.passive.temperature = CELSIUS_TO_KELVIN(passive);
|
|
for (i = 0; i < num - 3; i++) {
|
|
if (!(tz->trips.active[i].flags.valid))
|
|
break;
|
|
tz->trips.active[i].temperature = CELSIUS_TO_KELVIN(active[i]);
|
|
}
|
|
|
|
end:
|
|
kfree(active);
|
|
kfree(limit_string);
|
|
return_VALUE(count);
|
|
}
|
|
|
|
|
|
static int acpi_thermal_cooling_seq_show(struct seq_file *seq, void *offset)
|
|
{
|
|
struct acpi_thermal *tz = (struct acpi_thermal *)seq->private;
|
|
|
|
ACPI_FUNCTION_TRACE("acpi_thermal_cooling_seq_show");
|
|
|
|
if (!tz)
|
|
goto end;
|
|
|
|
if (!tz->flags.cooling_mode) {
|
|
seq_puts(seq, "<setting not supported>\n");
|
|
}
|
|
|
|
if ( tz->cooling_mode == ACPI_THERMAL_MODE_CRITICAL )
|
|
seq_printf(seq, "cooling mode: critical\n");
|
|
else
|
|
seq_printf(seq, "cooling mode: %s\n",
|
|
tz->cooling_mode?"passive":"active");
|
|
|
|
end:
|
|
return_VALUE(0);
|
|
}
|
|
|
|
static int acpi_thermal_cooling_open_fs(struct inode *inode, struct file *file)
|
|
{
|
|
return single_open(file, acpi_thermal_cooling_seq_show,
|
|
PDE(inode)->data);
|
|
}
|
|
|
|
static ssize_t
|
|
acpi_thermal_write_cooling_mode (
|
|
struct file *file,
|
|
const char __user *buffer,
|
|
size_t count,
|
|
loff_t *ppos)
|
|
{
|
|
struct seq_file *m = (struct seq_file *)file->private_data;
|
|
struct acpi_thermal *tz = (struct acpi_thermal *)m->private;
|
|
int result = 0;
|
|
char mode_string[12] = {'\0'};
|
|
|
|
ACPI_FUNCTION_TRACE("acpi_thermal_write_cooling_mode");
|
|
|
|
if (!tz || (count > sizeof(mode_string) - 1))
|
|
return_VALUE(-EINVAL);
|
|
|
|
if (!tz->flags.cooling_mode)
|
|
return_VALUE(-ENODEV);
|
|
|
|
if (copy_from_user(mode_string, buffer, count))
|
|
return_VALUE(-EFAULT);
|
|
|
|
mode_string[count] = '\0';
|
|
|
|
result = acpi_thermal_set_cooling_mode(tz,
|
|
simple_strtoul(mode_string, NULL, 0));
|
|
if (result)
|
|
return_VALUE(result);
|
|
|
|
acpi_thermal_check(tz);
|
|
|
|
return_VALUE(count);
|
|
}
|
|
|
|
|
|
static int acpi_thermal_polling_seq_show(struct seq_file *seq, void *offset)
|
|
{
|
|
struct acpi_thermal *tz = (struct acpi_thermal *)seq->private;
|
|
|
|
ACPI_FUNCTION_TRACE("acpi_thermal_polling_seq_show");
|
|
|
|
if (!tz)
|
|
goto end;
|
|
|
|
if (!tz->polling_frequency) {
|
|
seq_puts(seq, "<polling disabled>\n");
|
|
goto end;
|
|
}
|
|
|
|
seq_printf(seq, "polling frequency: %lu seconds\n",
|
|
(tz->polling_frequency / 10));
|
|
|
|
end:
|
|
return_VALUE(0);
|
|
}
|
|
|
|
static int acpi_thermal_polling_open_fs(struct inode *inode, struct file *file)
|
|
{
|
|
return single_open(file, acpi_thermal_polling_seq_show,
|
|
PDE(inode)->data);
|
|
}
|
|
|
|
static ssize_t
|
|
acpi_thermal_write_polling (
|
|
struct file *file,
|
|
const char __user *buffer,
|
|
size_t count,
|
|
loff_t *ppos)
|
|
{
|
|
struct seq_file *m = (struct seq_file *)file->private_data;
|
|
struct acpi_thermal *tz = (struct acpi_thermal *)m->private;
|
|
int result = 0;
|
|
char polling_string[12] = {'\0'};
|
|
int seconds = 0;
|
|
|
|
ACPI_FUNCTION_TRACE("acpi_thermal_write_polling");
|
|
|
|
if (!tz || (count > sizeof(polling_string) - 1))
|
|
return_VALUE(-EINVAL);
|
|
|
|
if (copy_from_user(polling_string, buffer, count))
|
|
return_VALUE(-EFAULT);
|
|
|
|
polling_string[count] = '\0';
|
|
|
|
seconds = simple_strtoul(polling_string, NULL, 0);
|
|
|
|
result = acpi_thermal_set_polling(tz, seconds);
|
|
if (result)
|
|
return_VALUE(result);
|
|
|
|
acpi_thermal_check(tz);
|
|
|
|
return_VALUE(count);
|
|
}
|
|
|
|
|
|
static int
|
|
acpi_thermal_add_fs (
|
|
struct acpi_device *device)
|
|
{
|
|
struct proc_dir_entry *entry = NULL;
|
|
|
|
ACPI_FUNCTION_TRACE("acpi_thermal_add_fs");
|
|
|
|
if (!acpi_device_dir(device)) {
|
|
acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
|
|
acpi_thermal_dir);
|
|
if (!acpi_device_dir(device))
|
|
return_VALUE(-ENODEV);
|
|
acpi_device_dir(device)->owner = THIS_MODULE;
|
|
}
|
|
|
|
/* 'state' [R] */
|
|
entry = create_proc_entry(ACPI_THERMAL_FILE_STATE,
|
|
S_IRUGO, acpi_device_dir(device));
|
|
if (!entry)
|
|
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
|
|
"Unable to create '%s' fs entry\n",
|
|
ACPI_THERMAL_FILE_STATE));
|
|
else {
|
|
entry->proc_fops = &acpi_thermal_state_fops;
|
|
entry->data = acpi_driver_data(device);
|
|
entry->owner = THIS_MODULE;
|
|
}
|
|
|
|
/* 'temperature' [R] */
|
|
entry = create_proc_entry(ACPI_THERMAL_FILE_TEMPERATURE,
|
|
S_IRUGO, acpi_device_dir(device));
|
|
if (!entry)
|
|
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
|
|
"Unable to create '%s' fs entry\n",
|
|
ACPI_THERMAL_FILE_TEMPERATURE));
|
|
else {
|
|
entry->proc_fops = &acpi_thermal_temp_fops;
|
|
entry->data = acpi_driver_data(device);
|
|
entry->owner = THIS_MODULE;
|
|
}
|
|
|
|
/* 'trip_points' [R/W] */
|
|
entry = create_proc_entry(ACPI_THERMAL_FILE_TRIP_POINTS,
|
|
S_IFREG|S_IRUGO|S_IWUSR, acpi_device_dir(device));
|
|
if (!entry)
|
|
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
|
|
"Unable to create '%s' fs entry\n",
|
|
ACPI_THERMAL_FILE_TRIP_POINTS));
|
|
else {
|
|
entry->proc_fops = &acpi_thermal_trip_fops;
|
|
entry->data = acpi_driver_data(device);
|
|
entry->owner = THIS_MODULE;
|
|
}
|
|
|
|
/* 'cooling_mode' [R/W] */
|
|
entry = create_proc_entry(ACPI_THERMAL_FILE_COOLING_MODE,
|
|
S_IFREG|S_IRUGO|S_IWUSR, acpi_device_dir(device));
|
|
if (!entry)
|
|
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
|
|
"Unable to create '%s' fs entry\n",
|
|
ACPI_THERMAL_FILE_COOLING_MODE));
|
|
else {
|
|
entry->proc_fops = &acpi_thermal_cooling_fops;
|
|
entry->data = acpi_driver_data(device);
|
|
entry->owner = THIS_MODULE;
|
|
}
|
|
|
|
/* 'polling_frequency' [R/W] */
|
|
entry = create_proc_entry(ACPI_THERMAL_FILE_POLLING_FREQ,
|
|
S_IFREG|S_IRUGO|S_IWUSR, acpi_device_dir(device));
|
|
if (!entry)
|
|
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
|
|
"Unable to create '%s' fs entry\n",
|
|
ACPI_THERMAL_FILE_POLLING_FREQ));
|
|
else {
|
|
entry->proc_fops = &acpi_thermal_polling_fops;
|
|
entry->data = acpi_driver_data(device);
|
|
entry->owner = THIS_MODULE;
|
|
}
|
|
|
|
return_VALUE(0);
|
|
}
|
|
|
|
|
|
static int
|
|
acpi_thermal_remove_fs (
|
|
struct acpi_device *device)
|
|
{
|
|
ACPI_FUNCTION_TRACE("acpi_thermal_remove_fs");
|
|
|
|
if (acpi_device_dir(device)) {
|
|
remove_proc_entry(ACPI_THERMAL_FILE_POLLING_FREQ,
|
|
acpi_device_dir(device));
|
|
remove_proc_entry(ACPI_THERMAL_FILE_COOLING_MODE,
|
|
acpi_device_dir(device));
|
|
remove_proc_entry(ACPI_THERMAL_FILE_TRIP_POINTS,
|
|
acpi_device_dir(device));
|
|
remove_proc_entry(ACPI_THERMAL_FILE_TEMPERATURE,
|
|
acpi_device_dir(device));
|
|
remove_proc_entry(ACPI_THERMAL_FILE_STATE,
|
|
acpi_device_dir(device));
|
|
remove_proc_entry(acpi_device_bid(device), acpi_thermal_dir);
|
|
acpi_device_dir(device) = NULL;
|
|
}
|
|
|
|
return_VALUE(0);
|
|
}
|
|
|
|
|
|
/* --------------------------------------------------------------------------
|
|
Driver Interface
|
|
-------------------------------------------------------------------------- */
|
|
|
|
static void
|
|
acpi_thermal_notify (
|
|
acpi_handle handle,
|
|
u32 event,
|
|
void *data)
|
|
{
|
|
struct acpi_thermal *tz = (struct acpi_thermal *) data;
|
|
struct acpi_device *device = NULL;
|
|
|
|
ACPI_FUNCTION_TRACE("acpi_thermal_notify");
|
|
|
|
if (!tz)
|
|
return_VOID;
|
|
|
|
if (acpi_bus_get_device(tz->handle, &device))
|
|
return_VOID;
|
|
|
|
switch (event) {
|
|
case ACPI_THERMAL_NOTIFY_TEMPERATURE:
|
|
acpi_thermal_check(tz);
|
|
break;
|
|
case ACPI_THERMAL_NOTIFY_THRESHOLDS:
|
|
acpi_thermal_get_trip_points(tz);
|
|
acpi_thermal_check(tz);
|
|
acpi_bus_generate_event(device, event, 0);
|
|
break;
|
|
case ACPI_THERMAL_NOTIFY_DEVICES:
|
|
if (tz->flags.devices)
|
|
acpi_thermal_get_devices(tz);
|
|
acpi_bus_generate_event(device, event, 0);
|
|
break;
|
|
default:
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
|
"Unsupported event [0x%x]\n", event));
|
|
break;
|
|
}
|
|
|
|
return_VOID;
|
|
}
|
|
|
|
|
|
static int
|
|
acpi_thermal_get_info (
|
|
struct acpi_thermal *tz)
|
|
{
|
|
int result = 0;
|
|
|
|
ACPI_FUNCTION_TRACE("acpi_thermal_get_info");
|
|
|
|
if (!tz)
|
|
return_VALUE(-EINVAL);
|
|
|
|
/* Get temperature [_TMP] (required) */
|
|
result = acpi_thermal_get_temperature(tz);
|
|
if (result)
|
|
return_VALUE(result);
|
|
|
|
/* Get trip points [_CRT, _PSV, etc.] (required) */
|
|
result = acpi_thermal_get_trip_points(tz);
|
|
if (result)
|
|
return_VALUE(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;
|
|
else {
|
|
/* Oh,we have not _SCP method.
|
|
Generally show cooling_mode by _ACx, _PSV,spec 12.2*/
|
|
tz->flags.cooling_mode = 0;
|
|
if ( tz->trips.active[0].flags.valid && tz->trips.passive.flags.valid ) {
|
|
if ( tz->trips.passive.temperature > tz->trips.active[0].temperature )
|
|
tz->cooling_mode = ACPI_THERMAL_MODE_ACTIVE;
|
|
else
|
|
tz->cooling_mode = ACPI_THERMAL_MODE_PASSIVE;
|
|
} else if ( !tz->trips.active[0].flags.valid && tz->trips.passive.flags.valid ) {
|
|
tz->cooling_mode = ACPI_THERMAL_MODE_PASSIVE;
|
|
} else if ( tz->trips.active[0].flags.valid && !tz->trips.passive.flags.valid ) {
|
|
tz->cooling_mode = ACPI_THERMAL_MODE_ACTIVE;
|
|
} else {
|
|
/* _ACx and _PSV are optional, but _CRT is required */
|
|
tz->cooling_mode = ACPI_THERMAL_MODE_CRITICAL;
|
|
}
|
|
}
|
|
|
|
/* Get default polling frequency [_TZP] (optional) */
|
|
if (tzp)
|
|
tz->polling_frequency = tzp;
|
|
else
|
|
acpi_thermal_get_polling_frequency(tz);
|
|
|
|
/* Get devices in this thermal zone [_TZD] (optional) */
|
|
result = acpi_thermal_get_devices(tz);
|
|
if (!result)
|
|
tz->flags.devices = 1;
|
|
|
|
return_VALUE(0);
|
|
}
|
|
|
|
|
|
static int
|
|
acpi_thermal_add (
|
|
struct acpi_device *device)
|
|
{
|
|
int result = 0;
|
|
acpi_status status = AE_OK;
|
|
struct acpi_thermal *tz = NULL;
|
|
|
|
ACPI_FUNCTION_TRACE("acpi_thermal_add");
|
|
|
|
if (!device)
|
|
return_VALUE(-EINVAL);
|
|
|
|
tz = kmalloc(sizeof(struct acpi_thermal), GFP_KERNEL);
|
|
if (!tz)
|
|
return_VALUE(-ENOMEM);
|
|
memset(tz, 0, sizeof(struct acpi_thermal));
|
|
|
|
tz->handle = device->handle;
|
|
strcpy(tz->name, device->pnp.bus_id);
|
|
strcpy(acpi_device_name(device), ACPI_THERMAL_DEVICE_NAME);
|
|
strcpy(acpi_device_class(device), ACPI_THERMAL_CLASS);
|
|
acpi_driver_data(device) = tz;
|
|
|
|
result = acpi_thermal_get_info(tz);
|
|
if (result)
|
|
goto end;
|
|
|
|
result = acpi_thermal_add_fs(device);
|
|
if (result)
|
|
return_VALUE(result);
|
|
|
|
init_timer(&tz->timer);
|
|
|
|
acpi_thermal_check(tz);
|
|
|
|
status = acpi_install_notify_handler(tz->handle,
|
|
ACPI_DEVICE_NOTIFY, acpi_thermal_notify, tz);
|
|
if (ACPI_FAILURE(status)) {
|
|
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
|
|
"Error installing notify handler\n"));
|
|
result = -ENODEV;
|
|
goto end;
|
|
}
|
|
|
|
printk(KERN_INFO PREFIX "%s [%s] (%ld C)\n",
|
|
acpi_device_name(device), acpi_device_bid(device),
|
|
KELVIN_TO_CELSIUS(tz->temperature));
|
|
|
|
end:
|
|
if (result) {
|
|
acpi_thermal_remove_fs(device);
|
|
kfree(tz);
|
|
}
|
|
|
|
return_VALUE(result);
|
|
}
|
|
|
|
|
|
static int
|
|
acpi_thermal_remove (
|
|
struct acpi_device *device,
|
|
int type)
|
|
{
|
|
acpi_status status = AE_OK;
|
|
struct acpi_thermal *tz = NULL;
|
|
|
|
ACPI_FUNCTION_TRACE("acpi_thermal_remove");
|
|
|
|
if (!device || !acpi_driver_data(device))
|
|
return_VALUE(-EINVAL);
|
|
|
|
tz = (struct acpi_thermal *) acpi_driver_data(device);
|
|
|
|
/* avoid timer adding new defer task */
|
|
tz->zombie = 1;
|
|
/* wait for running timer (on other CPUs) finish */
|
|
del_timer_sync(&(tz->timer));
|
|
/* synchronize deferred task */
|
|
acpi_os_wait_events_complete(NULL);
|
|
/* deferred task may reinsert timer */
|
|
del_timer_sync(&(tz->timer));
|
|
|
|
status = acpi_remove_notify_handler(tz->handle,
|
|
ACPI_DEVICE_NOTIFY, acpi_thermal_notify);
|
|
if (ACPI_FAILURE(status))
|
|
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
|
|
"Error removing notify handler\n"));
|
|
|
|
/* Terminate policy */
|
|
if (tz->trips.passive.flags.valid
|
|
&& tz->trips.passive.flags.enabled) {
|
|
tz->trips.passive.flags.enabled = 0;
|
|
acpi_thermal_passive(tz);
|
|
}
|
|
if (tz->trips.active[0].flags.valid
|
|
&& tz->trips.active[0].flags.enabled) {
|
|
tz->trips.active[0].flags.enabled = 0;
|
|
acpi_thermal_active(tz);
|
|
}
|
|
|
|
acpi_thermal_remove_fs(device);
|
|
|
|
kfree(tz);
|
|
return_VALUE(0);
|
|
}
|
|
|
|
|
|
static int __init
|
|
acpi_thermal_init (void)
|
|
{
|
|
int result = 0;
|
|
|
|
ACPI_FUNCTION_TRACE("acpi_thermal_init");
|
|
|
|
acpi_thermal_dir = proc_mkdir(ACPI_THERMAL_CLASS, acpi_root_dir);
|
|
if (!acpi_thermal_dir)
|
|
return_VALUE(-ENODEV);
|
|
acpi_thermal_dir->owner = THIS_MODULE;
|
|
|
|
result = acpi_bus_register_driver(&acpi_thermal_driver);
|
|
if (result < 0) {
|
|
remove_proc_entry(ACPI_THERMAL_CLASS, acpi_root_dir);
|
|
return_VALUE(-ENODEV);
|
|
}
|
|
|
|
return_VALUE(0);
|
|
}
|
|
|
|
|
|
static void __exit
|
|
acpi_thermal_exit (void)
|
|
{
|
|
ACPI_FUNCTION_TRACE("acpi_thermal_exit");
|
|
|
|
acpi_bus_unregister_driver(&acpi_thermal_driver);
|
|
|
|
remove_proc_entry(ACPI_THERMAL_CLASS, acpi_root_dir);
|
|
|
|
return_VOID;
|
|
}
|
|
|
|
|
|
module_init(acpi_thermal_init);
|
|
module_exit(acpi_thermal_exit);
|