1416 lines
36 KiB
C
1416 lines
36 KiB
C
/*
|
|
* acpi_thermal.c - ACPI Thermal Zone Driver ($Revision: 41 $)
|
|
*
|
|
* Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
|
|
* Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
|
|
*
|
|
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or (at
|
|
* your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along
|
|
* with this program; if not, write to the Free Software Foundation, Inc.,
|
|
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
|
|
*
|
|
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
*
|
|
* This driver fully implements the ACPI thermal policy as described in the
|
|
* ACPI 2.0 Specification.
|
|
*
|
|
* TBD: 1. Implement passive cooling hysteresis.
|
|
* 2. Enhance passive cooling (CPU) states/limit interface to support
|
|
* concepts of 'multiple limiters', upper/lower limits, etc.
|
|
*
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/init.h>
|
|
#include <linux/types.h>
|
|
#include <linux/proc_fs.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/kmod.h>
|
|
#include <linux/seq_file.h>
|
|
#include <asm/uaccess.h>
|
|
|
|
#include <acpi/acpi_bus.h>
|
|
#include <acpi/acpi_drivers.h>
|
|
|
|
#define ACPI_THERMAL_COMPONENT 0x04000000
|
|
#define ACPI_THERMAL_CLASS "thermal_zone"
|
|
#define ACPI_THERMAL_DRIVER_NAME "ACPI Thermal Zone Driver"
|
|
#define ACPI_THERMAL_DEVICE_NAME "Thermal Zone"
|
|
#define ACPI_THERMAL_FILE_STATE "state"
|
|
#define ACPI_THERMAL_FILE_TEMPERATURE "temperature"
|
|
#define ACPI_THERMAL_FILE_TRIP_POINTS "trip_points"
|
|
#define ACPI_THERMAL_FILE_COOLING_MODE "cooling_mode"
|
|
#define ACPI_THERMAL_FILE_POLLING_FREQ "polling_frequency"
|
|
#define ACPI_THERMAL_NOTIFY_TEMPERATURE 0x80
|
|
#define ACPI_THERMAL_NOTIFY_THRESHOLDS 0x81
|
|
#define ACPI_THERMAL_NOTIFY_DEVICES 0x82
|
|
#define ACPI_THERMAL_NOTIFY_CRITICAL 0xF0
|
|
#define ACPI_THERMAL_NOTIFY_HOT 0xF1
|
|
#define ACPI_THERMAL_MODE_ACTIVE 0x00
|
|
#define ACPI_THERMAL_MODE_PASSIVE 0x01
|
|
#define ACPI_THERMAL_MODE_CRITICAL 0xff
|
|
#define ACPI_THERMAL_PATH_POWEROFF "/sbin/poweroff"
|
|
|
|
#define ACPI_THERMAL_MAX_ACTIVE 10
|
|
#define ACPI_THERMAL_MAX_LIMIT_STR_LEN 65
|
|
|
|
#define KELVIN_TO_CELSIUS(t) (long)(((long)t-2732>=0) ? ((long)t-2732+5)/10 : ((long)t-2732-5)/10)
|
|
#define CELSIUS_TO_KELVIN(t) ((t+273)*10)
|
|
|
|
#define _COMPONENT ACPI_THERMAL_COMPONENT
|
|
ACPI_MODULE_NAME("acpi_thermal")
|
|
|
|
MODULE_AUTHOR("Paul Diefenbaugh");
|
|
MODULE_DESCRIPTION(ACPI_THERMAL_DRIVER_NAME);
|
|
MODULE_LICENSE("GPL");
|
|
|
|
static int tzp;
|
|
module_param(tzp, int, 0);
|
|
MODULE_PARM_DESC(tzp, "Thermal zone polling frequency, in 1/10 seconds.\n");
|
|
|
|
static int acpi_thermal_add(struct acpi_device *device);
|
|
static int acpi_thermal_remove(struct acpi_device *device, int type);
|
|
static int acpi_thermal_resume(struct acpi_device *device);
|
|
static int acpi_thermal_state_open_fs(struct inode *inode, struct file *file);
|
|
static int acpi_thermal_temp_open_fs(struct inode *inode, struct file *file);
|
|
static int acpi_thermal_trip_open_fs(struct inode *inode, struct file *file);
|
|
static ssize_t acpi_thermal_write_trip_points(struct file *,
|
|
const char __user *, size_t,
|
|
loff_t *);
|
|
static int acpi_thermal_cooling_open_fs(struct inode *inode, struct file *file);
|
|
static ssize_t acpi_thermal_write_cooling_mode(struct file *,
|
|
const char __user *, size_t,
|
|
loff_t *);
|
|
static int acpi_thermal_polling_open_fs(struct inode *inode, struct file *file);
|
|
static ssize_t acpi_thermal_write_polling(struct file *, const char __user *,
|
|
size_t, loff_t *);
|
|
|
|
static struct acpi_driver acpi_thermal_driver = {
|
|
.name = ACPI_THERMAL_DRIVER_NAME,
|
|
.class = ACPI_THERMAL_CLASS,
|
|
.ids = ACPI_THERMAL_HID,
|
|
.ops = {
|
|
.add = acpi_thermal_add,
|
|
.remove = acpi_thermal_remove,
|
|
.resume = acpi_thermal_resume,
|
|
},
|
|
};
|
|
|
|
struct acpi_thermal_state {
|
|
u8 critical:1;
|
|
u8 hot:1;
|
|
u8 passive:1;
|
|
u8 active:1;
|
|
u8 reserved:4;
|
|
int active_index;
|
|
};
|
|
|
|
struct acpi_thermal_state_flags {
|
|
u8 valid:1;
|
|
u8 enabled:1;
|
|
u8 reserved:6;
|
|
};
|
|
|
|
struct acpi_thermal_critical {
|
|
struct acpi_thermal_state_flags flags;
|
|
unsigned long temperature;
|
|
};
|
|
|
|
struct acpi_thermal_hot {
|
|
struct acpi_thermal_state_flags flags;
|
|
unsigned long temperature;
|
|
};
|
|
|
|
struct acpi_thermal_passive {
|
|
struct acpi_thermal_state_flags flags;
|
|
unsigned long temperature;
|
|
unsigned long tc1;
|
|
unsigned long tc2;
|
|
unsigned long tsp;
|
|
struct acpi_handle_list devices;
|
|
};
|
|
|
|
struct acpi_thermal_active {
|
|
struct acpi_thermal_state_flags flags;
|
|
unsigned long temperature;
|
|
struct acpi_handle_list devices;
|
|
};
|
|
|
|
struct acpi_thermal_trips {
|
|
struct acpi_thermal_critical critical;
|
|
struct acpi_thermal_hot hot;
|
|
struct acpi_thermal_passive passive;
|
|
struct acpi_thermal_active active[ACPI_THERMAL_MAX_ACTIVE];
|
|
};
|
|
|
|
struct acpi_thermal_flags {
|
|
u8 cooling_mode:1; /* _SCP */
|
|
u8 devices:1; /* _TZD */
|
|
u8 reserved:6;
|
|
};
|
|
|
|
struct acpi_thermal {
|
|
struct acpi_device * device;
|
|
acpi_bus_id name;
|
|
unsigned long temperature;
|
|
unsigned long last_temperature;
|
|
unsigned long polling_frequency;
|
|
u8 cooling_mode;
|
|
volatile u8 zombie;
|
|
struct acpi_thermal_flags flags;
|
|
struct acpi_thermal_state state;
|
|
struct acpi_thermal_trips trips;
|
|
struct acpi_handle_list devices;
|
|
struct timer_list timer;
|
|
};
|
|
|
|
static const struct file_operations acpi_thermal_state_fops = {
|
|
.open = acpi_thermal_state_open_fs,
|
|
.read = seq_read,
|
|
.llseek = seq_lseek,
|
|
.release = single_release,
|
|
};
|
|
|
|
static const struct file_operations acpi_thermal_temp_fops = {
|
|
.open = acpi_thermal_temp_open_fs,
|
|
.read = seq_read,
|
|
.llseek = seq_lseek,
|
|
.release = single_release,
|
|
};
|
|
|
|
static const struct file_operations acpi_thermal_trip_fops = {
|
|
.open = acpi_thermal_trip_open_fs,
|
|
.read = seq_read,
|
|
.write = acpi_thermal_write_trip_points,
|
|
.llseek = seq_lseek,
|
|
.release = single_release,
|
|
};
|
|
|
|
static const struct file_operations acpi_thermal_cooling_fops = {
|
|
.open = acpi_thermal_cooling_open_fs,
|
|
.read = seq_read,
|
|
.write = acpi_thermal_write_cooling_mode,
|
|
.llseek = seq_lseek,
|
|
.release = single_release,
|
|
};
|
|
|
|
static const struct file_operations acpi_thermal_polling_fops = {
|
|
.open = acpi_thermal_polling_open_fs,
|
|
.read = seq_read,
|
|
.write = acpi_thermal_write_polling,
|
|
.llseek = seq_lseek,
|
|
.release = single_release,
|
|
};
|
|
|
|
/* --------------------------------------------------------------------------
|
|
Thermal Zone Management
|
|
-------------------------------------------------------------------------- */
|
|
|
|
static int acpi_thermal_get_temperature(struct acpi_thermal *tz)
|
|
{
|
|
acpi_status status = AE_OK;
|
|
|
|
|
|
if (!tz)
|
|
return -EINVAL;
|
|
|
|
tz->last_temperature = tz->temperature;
|
|
|
|
status =
|
|
acpi_evaluate_integer(tz->device->handle, "_TMP", NULL, &tz->temperature);
|
|
if (ACPI_FAILURE(status))
|
|
return -ENODEV;
|
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Temperature is %lu dK\n",
|
|
tz->temperature));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int acpi_thermal_get_polling_frequency(struct acpi_thermal *tz)
|
|
{
|
|
acpi_status status = AE_OK;
|
|
|
|
|
|
if (!tz)
|
|
return -EINVAL;
|
|
|
|
status =
|
|
acpi_evaluate_integer(tz->device->handle, "_TZP", NULL,
|
|
&tz->polling_frequency);
|
|
if (ACPI_FAILURE(status))
|
|
return -ENODEV;
|
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Polling frequency is %lu dS\n",
|
|
tz->polling_frequency));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int acpi_thermal_set_polling(struct acpi_thermal *tz, int seconds)
|
|
{
|
|
|
|
if (!tz)
|
|
return -EINVAL;
|
|
|
|
tz->polling_frequency = seconds * 10; /* Convert value to deci-seconds */
|
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
|
"Polling frequency set to %lu seconds\n",
|
|
tz->polling_frequency/10));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int acpi_thermal_set_cooling_mode(struct acpi_thermal *tz, int mode)
|
|
{
|
|
acpi_status status = AE_OK;
|
|
union acpi_object arg0 = { ACPI_TYPE_INTEGER };
|
|
struct acpi_object_list arg_list = { 1, &arg0 };
|
|
acpi_handle handle = NULL;
|
|
|
|
|
|
if (!tz)
|
|
return -EINVAL;
|
|
|
|
status = acpi_get_handle(tz->device->handle, "_SCP", &handle);
|
|
if (ACPI_FAILURE(status)) {
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "_SCP not present\n"));
|
|
return -ENODEV;
|
|
}
|
|
|
|
arg0.integer.value = mode;
|
|
|
|
status = acpi_evaluate_object(handle, NULL, &arg_list, NULL);
|
|
if (ACPI_FAILURE(status))
|
|
return -ENODEV;
|
|
|
|
tz->cooling_mode = mode;
|
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Cooling mode [%s]\n",
|
|
mode ? "passive" : "active"));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int acpi_thermal_get_trip_points(struct acpi_thermal *tz)
|
|
{
|
|
acpi_status status = AE_OK;
|
|
int i = 0;
|
|
|
|
|
|
if (!tz)
|
|
return -EINVAL;
|
|
|
|
/* Critical Shutdown (required) */
|
|
|
|
status = acpi_evaluate_integer(tz->device->handle, "_CRT", NULL,
|
|
&tz->trips.critical.temperature);
|
|
if (ACPI_FAILURE(status)) {
|
|
tz->trips.critical.flags.valid = 0;
|
|
ACPI_EXCEPTION((AE_INFO, status, "No critical threshold"));
|
|
return -ENODEV;
|
|
} else {
|
|
tz->trips.critical.flags.valid = 1;
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
|
"Found critical threshold [%lu]\n",
|
|
tz->trips.critical.temperature));
|
|
}
|
|
|
|
/* Critical Sleep (optional) */
|
|
|
|
status =
|
|
acpi_evaluate_integer(tz->device->handle, "_HOT", NULL,
|
|
&tz->trips.hot.temperature);
|
|
if (ACPI_FAILURE(status)) {
|
|
tz->trips.hot.flags.valid = 0;
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No hot threshold\n"));
|
|
} else {
|
|
tz->trips.hot.flags.valid = 1;
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found hot threshold [%lu]\n",
|
|
tz->trips.hot.temperature));
|
|
}
|
|
|
|
/* Passive: Processors (optional) */
|
|
|
|
status =
|
|
acpi_evaluate_integer(tz->device->handle, "_PSV", NULL,
|
|
&tz->trips.passive.temperature);
|
|
if (ACPI_FAILURE(status)) {
|
|
tz->trips.passive.flags.valid = 0;
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No passive threshold\n"));
|
|
} else {
|
|
tz->trips.passive.flags.valid = 1;
|
|
|
|
status =
|
|
acpi_evaluate_integer(tz->device->handle, "_TC1", NULL,
|
|
&tz->trips.passive.tc1);
|
|
if (ACPI_FAILURE(status))
|
|
tz->trips.passive.flags.valid = 0;
|
|
|
|
status =
|
|
acpi_evaluate_integer(tz->device->handle, "_TC2", NULL,
|
|
&tz->trips.passive.tc2);
|
|
if (ACPI_FAILURE(status))
|
|
tz->trips.passive.flags.valid = 0;
|
|
|
|
status =
|
|
acpi_evaluate_integer(tz->device->handle, "_TSP", NULL,
|
|
&tz->trips.passive.tsp);
|
|
if (ACPI_FAILURE(status))
|
|
tz->trips.passive.flags.valid = 0;
|
|
|
|
status =
|
|
acpi_evaluate_reference(tz->device->handle, "_PSL", NULL,
|
|
&tz->trips.passive.devices);
|
|
if (ACPI_FAILURE(status))
|
|
tz->trips.passive.flags.valid = 0;
|
|
|
|
if (!tz->trips.passive.flags.valid)
|
|
printk(KERN_WARNING PREFIX "Invalid passive threshold\n");
|
|
else
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
|
"Found passive threshold [%lu]\n",
|
|
tz->trips.passive.temperature));
|
|
}
|
|
|
|
/* Active: Fans, etc. (optional) */
|
|
|
|
for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
|
|
|
|
char name[5] = { '_', 'A', 'C', ('0' + i), '\0' };
|
|
|
|
status =
|
|
acpi_evaluate_integer(tz->device->handle, name, NULL,
|
|
&tz->trips.active[i].temperature);
|
|
if (ACPI_FAILURE(status))
|
|
break;
|
|
|
|
name[2] = 'L';
|
|
status =
|
|
acpi_evaluate_reference(tz->device->handle, name, NULL,
|
|
&tz->trips.active[i].devices);
|
|
if (ACPI_SUCCESS(status)) {
|
|
tz->trips.active[i].flags.valid = 1;
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
|
"Found active threshold [%d]:[%lu]\n",
|
|
i, tz->trips.active[i].temperature));
|
|
} else
|
|
ACPI_EXCEPTION((AE_INFO, status,
|
|
"Invalid active threshold [%d]", i));
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int acpi_thermal_get_devices(struct acpi_thermal *tz)
|
|
{
|
|
acpi_status status = AE_OK;
|
|
|
|
|
|
if (!tz)
|
|
return -EINVAL;
|
|
|
|
status =
|
|
acpi_evaluate_reference(tz->device->handle, "_TZD", NULL, &tz->devices);
|
|
if (ACPI_FAILURE(status))
|
|
return -ENODEV;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int acpi_thermal_call_usermode(char *path)
|
|
{
|
|
char *argv[2] = { NULL, NULL };
|
|
char *envp[3] = { NULL, NULL, NULL };
|
|
|
|
|
|
if (!path)
|
|
return -EINVAL;
|
|
|
|
argv[0] = path;
|
|
|
|
/* minimal command environment */
|
|
envp[0] = "HOME=/";
|
|
envp[1] = "PATH=/sbin:/bin:/usr/sbin:/usr/bin";
|
|
|
|
call_usermodehelper(argv[0], argv, envp, 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int acpi_thermal_critical(struct acpi_thermal *tz)
|
|
{
|
|
if (!tz || !tz->trips.critical.flags.valid)
|
|
return -EINVAL;
|
|
|
|
if (tz->temperature >= tz->trips.critical.temperature) {
|
|
printk(KERN_WARNING PREFIX "Critical trip point\n");
|
|
tz->trips.critical.flags.enabled = 1;
|
|
} else if (tz->trips.critical.flags.enabled)
|
|
tz->trips.critical.flags.enabled = 0;
|
|
|
|
printk(KERN_EMERG
|
|
"Critical temperature reached (%ld C), shutting down.\n",
|
|
KELVIN_TO_CELSIUS(tz->temperature));
|
|
acpi_bus_generate_event(tz->device, ACPI_THERMAL_NOTIFY_CRITICAL,
|
|
tz->trips.critical.flags.enabled);
|
|
|
|
acpi_thermal_call_usermode(ACPI_THERMAL_PATH_POWEROFF);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int acpi_thermal_hot(struct acpi_thermal *tz)
|
|
{
|
|
if (!tz || !tz->trips.hot.flags.valid)
|
|
return -EINVAL;
|
|
|
|
if (tz->temperature >= tz->trips.hot.temperature) {
|
|
printk(KERN_WARNING PREFIX "Hot trip point\n");
|
|
tz->trips.hot.flags.enabled = 1;
|
|
} else if (tz->trips.hot.flags.enabled)
|
|
tz->trips.hot.flags.enabled = 0;
|
|
|
|
acpi_bus_generate_event(tz->device, ACPI_THERMAL_NOTIFY_HOT,
|
|
tz->trips.hot.flags.enabled);
|
|
|
|
/* TBD: Call user-mode "sleep(S4)" function */
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void acpi_thermal_passive(struct acpi_thermal *tz)
|
|
{
|
|
int result = 1;
|
|
struct acpi_thermal_passive *passive = NULL;
|
|
int trend = 0;
|
|
int i = 0;
|
|
|
|
|
|
if (!tz || !tz->trips.passive.flags.valid)
|
|
return;
|
|
|
|
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));
|
|
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++)
|
|
/*
|
|
* assume that we are on highest
|
|
* freq/lowest thrott and can leave
|
|
* passive mode, even in error case
|
|
*/
|
|
if (!acpi_processor_set_thermal_limit
|
|
(passive->devices.handles[i],
|
|
ACPI_PROCESSOR_LIMIT_DECREMENT))
|
|
result = 0;
|
|
/*
|
|
* Leave cooling mode, even if the temp might
|
|
* higher than trip point This is because some
|
|
* machines might have long thermal polling
|
|
* frequencies (tsp) defined. We will fall back
|
|
* into passive mode in next cycle (probably quicker)
|
|
*/
|
|
if (result) {
|
|
passive->flags.enabled = 0;
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
|
"Disabling passive cooling, still above threshold,"
|
|
" but we are cooling down\n"));
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Below Trip?
|
|
* -----------
|
|
* Implement passive cooling hysteresis to slowly increase performance
|
|
* and avoid thrashing around the passive trip point. Note that we
|
|
* assume symmetry.
|
|
*/
|
|
if (!passive->flags.enabled)
|
|
return;
|
|
for (i = 0; i < passive->devices.count; i++)
|
|
if (!acpi_processor_set_thermal_limit
|
|
(passive->devices.handles[i],
|
|
ACPI_PROCESSOR_LIMIT_DECREMENT))
|
|
result = 0;
|
|
if (result) {
|
|
passive->flags.enabled = 0;
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
|
"Disabling passive cooling (zone is cool)\n"));
|
|
}
|
|
}
|
|
|
|
static void 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;
|
|
|
|
|
|
if (!tz)
|
|
return;
|
|
|
|
for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
|
|
active = &(tz->trips.active[i]);
|
|
if (!active || !active->flags.valid)
|
|
break;
|
|
if (tz->temperature >= active->temperature) {
|
|
/*
|
|
* Above Threshold?
|
|
* ----------------
|
|
* If not already enabled, turn ON all cooling devices
|
|
* associated with this active threshold.
|
|
*/
|
|
if (active->temperature > maxtemp)
|
|
tz->state.active_index = i;
|
|
maxtemp = active->temperature;
|
|
if (active->flags.enabled)
|
|
continue;
|
|
for (j = 0; j < active->devices.count; j++) {
|
|
result =
|
|
acpi_bus_set_power(active->devices.
|
|
handles[j],
|
|
ACPI_STATE_D0);
|
|
if (result) {
|
|
printk(KERN_WARNING PREFIX
|
|
"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]));
|
|
}
|
|
continue;
|
|
}
|
|
if (!active->flags.enabled)
|
|
continue;
|
|
/*
|
|
* Below Threshold?
|
|
* ----------------
|
|
* Turn OFF all cooling devices associated with this
|
|
* threshold.
|
|
*/
|
|
for (j = 0; j < active->devices.count; j++) {
|
|
result = acpi_bus_set_power(active->devices.handles[j],
|
|
ACPI_STATE_D3);
|
|
if (result) {
|
|
printk(KERN_WARNING PREFIX
|
|
"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]));
|
|
}
|
|
}
|
|
}
|
|
|
|
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_execute(OSL_GPE_HANDLER, acpi_thermal_check, (void *)data);
|
|
}
|
|
|
|
static void acpi_thermal_check(void *data)
|
|
{
|
|
int result = 0;
|
|
struct acpi_thermal *tz = data;
|
|
unsigned long sleep_time = 0;
|
|
int i = 0;
|
|
struct acpi_thermal_state state;
|
|
|
|
|
|
if (!tz) {
|
|
printk(KERN_ERR PREFIX "Invalid (NULL) context\n");
|
|
return;
|
|
}
|
|
|
|
state = tz->state;
|
|
|
|
result = acpi_thermal_get_temperature(tz);
|
|
if (result)
|
|
return;
|
|
|
|
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.
|
|
*/
|
|
tz->state.critical = tz->trips.critical.flags.enabled;
|
|
tz->state.hot = tz->trips.hot.flags.enabled;
|
|
tz->state.passive = tz->trips.passive.flags.enabled;
|
|
tz->state.active = 0;
|
|
for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++)
|
|
tz->state.active |= tz->trips.active[i].flags.enabled;
|
|
|
|
/*
|
|
* 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;
|
|
}
|
|
|
|
/* --------------------------------------------------------------------------
|
|
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 = seq->private;
|
|
|
|
|
|
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 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 = seq->private;
|
|
|
|
|
|
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 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 = seq->private;
|
|
int i = 0;
|
|
int j = 0;
|
|
|
|
|
|
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 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 = file->private_data;
|
|
struct acpi_thermal *tz = m->private;
|
|
|
|
char *limit_string;
|
|
int num, critical, hot, passive;
|
|
int *active;
|
|
int i = 0;
|
|
|
|
|
|
limit_string = kzalloc(ACPI_THERMAL_MAX_LIMIT_STR_LEN, GFP_KERNEL);
|
|
if (!limit_string)
|
|
return -ENOMEM;
|
|
|
|
active = kmalloc(ACPI_THERMAL_MAX_ACTIVE * sizeof(int), GFP_KERNEL);
|
|
if (!active) {
|
|
kfree(limit_string);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
if (!tz || (count > ACPI_THERMAL_MAX_LIMIT_STR_LEN - 1)) {
|
|
count = -EINVAL;
|
|
goto end;
|
|
}
|
|
|
|
if (copy_from_user(limit_string, buffer, count)) {
|
|
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))) {
|
|
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 count;
|
|
}
|
|
|
|
static int acpi_thermal_cooling_seq_show(struct seq_file *seq, void *offset)
|
|
{
|
|
struct acpi_thermal *tz = seq->private;
|
|
|
|
|
|
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 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 = file->private_data;
|
|
struct acpi_thermal *tz = m->private;
|
|
int result = 0;
|
|
char mode_string[12] = { '\0' };
|
|
|
|
|
|
if (!tz || (count > sizeof(mode_string) - 1))
|
|
return -EINVAL;
|
|
|
|
if (!tz->flags.cooling_mode)
|
|
return -ENODEV;
|
|
|
|
if (copy_from_user(mode_string, buffer, count))
|
|
return -EFAULT;
|
|
|
|
mode_string[count] = '\0';
|
|
|
|
result = acpi_thermal_set_cooling_mode(tz,
|
|
simple_strtoul(mode_string, NULL,
|
|
0));
|
|
if (result)
|
|
return result;
|
|
|
|
acpi_thermal_check(tz);
|
|
|
|
return count;
|
|
}
|
|
|
|
static int acpi_thermal_polling_seq_show(struct seq_file *seq, void *offset)
|
|
{
|
|
struct acpi_thermal *tz = seq->private;
|
|
|
|
|
|
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 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 = file->private_data;
|
|
struct acpi_thermal *tz = m->private;
|
|
int result = 0;
|
|
char polling_string[12] = { '\0' };
|
|
int seconds = 0;
|
|
|
|
|
|
if (!tz || (count > sizeof(polling_string) - 1))
|
|
return -EINVAL;
|
|
|
|
if (copy_from_user(polling_string, buffer, count))
|
|
return -EFAULT;
|
|
|
|
polling_string[count] = '\0';
|
|
|
|
seconds = simple_strtoul(polling_string, NULL, 0);
|
|
|
|
result = acpi_thermal_set_polling(tz, seconds);
|
|
if (result)
|
|
return result;
|
|
|
|
acpi_thermal_check(tz);
|
|
|
|
return count;
|
|
}
|
|
|
|
static int acpi_thermal_add_fs(struct acpi_device *device)
|
|
{
|
|
struct proc_dir_entry *entry = NULL;
|
|
|
|
|
|
if (!acpi_device_dir(device)) {
|
|
acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
|
|
acpi_thermal_dir);
|
|
if (!acpi_device_dir(device))
|
|
return -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)
|
|
return -ENODEV;
|
|
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)
|
|
return -ENODEV;
|
|
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)
|
|
return -ENODEV;
|
|
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)
|
|
return -ENODEV;
|
|
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)
|
|
return -ENODEV;
|
|
else {
|
|
entry->proc_fops = &acpi_thermal_polling_fops;
|
|
entry->data = acpi_driver_data(device);
|
|
entry->owner = THIS_MODULE;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int acpi_thermal_remove_fs(struct acpi_device *device)
|
|
{
|
|
|
|
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 0;
|
|
}
|
|
|
|
/* --------------------------------------------------------------------------
|
|
Driver Interface
|
|
-------------------------------------------------------------------------- */
|
|
|
|
static void acpi_thermal_notify(acpi_handle handle, u32 event, void *data)
|
|
{
|
|
struct acpi_thermal *tz = data;
|
|
struct acpi_device *device = NULL;
|
|
|
|
|
|
if (!tz)
|
|
return;
|
|
|
|
device = tz->device;
|
|
|
|
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;
|
|
}
|
|
|
|
static int acpi_thermal_get_info(struct acpi_thermal *tz)
|
|
{
|
|
int result = 0;
|
|
|
|
|
|
if (!tz)
|
|
return -EINVAL;
|
|
|
|
/* Get temperature [_TMP] (required) */
|
|
result = acpi_thermal_get_temperature(tz);
|
|
if (result)
|
|
return result;
|
|
|
|
/* Get trip points [_CRT, _PSV, etc.] (required) */
|
|
result = acpi_thermal_get_trip_points(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;
|
|
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 0;
|
|
}
|
|
|
|
static int acpi_thermal_add(struct acpi_device *device)
|
|
{
|
|
int result = 0;
|
|
acpi_status status = AE_OK;
|
|
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);
|
|
acpi_driver_data(device) = tz;
|
|
|
|
result = acpi_thermal_get_info(tz);
|
|
if (result)
|
|
goto end;
|
|
|
|
result = acpi_thermal_add_fs(device);
|
|
if (result)
|
|
goto end;
|
|
|
|
init_timer(&tz->timer);
|
|
|
|
acpi_thermal_check(tz);
|
|
|
|
status = acpi_install_notify_handler(device->handle,
|
|
ACPI_DEVICE_NOTIFY,
|
|
acpi_thermal_notify, tz);
|
|
if (ACPI_FAILURE(status)) {
|
|
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 result;
|
|
}
|
|
|
|
static int acpi_thermal_remove(struct acpi_device *device, int type)
|
|
{
|
|
acpi_status status = AE_OK;
|
|
struct acpi_thermal *tz = NULL;
|
|
|
|
|
|
if (!device || !acpi_driver_data(device))
|
|
return -EINVAL;
|
|
|
|
tz = 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(device->handle,
|
|
ACPI_DEVICE_NOTIFY,
|
|
acpi_thermal_notify);
|
|
|
|
/* 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 0;
|
|
}
|
|
|
|
static int acpi_thermal_resume(struct acpi_device *device)
|
|
{
|
|
struct acpi_thermal *tz = NULL;
|
|
int i;
|
|
|
|
if (!device || !acpi_driver_data(device))
|
|
return -EINVAL;
|
|
|
|
tz = acpi_driver_data(device);
|
|
|
|
acpi_thermal_get_temperature(tz);
|
|
|
|
for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
|
|
if (tz->trips.active[i].flags.valid) {
|
|
tz->temperature = tz->trips.active[i].temperature;
|
|
tz->trips.active[i].flags.enabled = 0;
|
|
|
|
acpi_thermal_active(tz);
|
|
|
|
tz->state.active |= tz->trips.active[i].flags.enabled;
|
|
tz->state.active_index = i;
|
|
}
|
|
}
|
|
|
|
acpi_thermal_check(tz);
|
|
|
|
return AE_OK;
|
|
}
|
|
|
|
static int __init acpi_thermal_init(void)
|
|
{
|
|
int result = 0;
|
|
|
|
|
|
acpi_thermal_dir = proc_mkdir(ACPI_THERMAL_CLASS, acpi_root_dir);
|
|
if (!acpi_thermal_dir)
|
|
return -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 -ENODEV;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void __exit acpi_thermal_exit(void)
|
|
{
|
|
|
|
acpi_bus_unregister_driver(&acpi_thermal_driver);
|
|
|
|
remove_proc_entry(ACPI_THERMAL_CLASS, acpi_root_dir);
|
|
|
|
return;
|
|
}
|
|
|
|
module_init(acpi_thermal_init);
|
|
module_exit(acpi_thermal_exit);
|