static int
acpi_thermal_critical (
struct acpi_thermal *tz)
{
int result = 0;
struct acpi_device *device = NULL;
ACPI_FUNCTION_TRACE("acpi_thermal_critical");
if (!tz || !tz->trips.critical.flags.valid)
return_VALUE(-EINVAL);
if (tz->temperature >= tz->trips.critical.temperature) {
ACPI_DEBUG_PRINT((ACPI_DB_WARN, "Critical trip point\n"));
tz->trips.critical.flags.enabled = 1;
}
else if (tz->trips.critical.flags.enabled)
tz->trips.critical.flags.enabled = 0;
result = acpi_bus_get_device(tz->handle, &device);
if (result)
return_VALUE(result);
printk(KERN_EMERG "Critical temperature reached (%ld C), shutting down.\n", KELVIN_TO_CELSIUS(tz->temperature));
acpi_bus_generate_event(device, ACPI_THERMAL_NOTIFY_CRITICAL, tz->trips.critical.flags.enabled);
acpi_thermal_call_usermode(ACPI_THERMAL_PATH_POWEROFF);
return_VALUE(0);
}
static int
acpi_thermal_critical (
struct acpi_thermal *tz)
{
int result = 0;
struct acpi_device *device = NULL;
ACPI_FUNCTION_TRACE("acpi_thermal_critical");
if (!tz || !tz->trips.critical.flags.valid)
return_VALUE(-EINVAL);
if (tz->temperature >= tz->trips.critical.temperature) {
ACPI_DEBUG_PRINT((ACPI_DB_WARN, "Critical trip point\n"));
tz->trips.critical.flags.enabled = 1;
}
else if (tz->trips.critical.flags.enabled)
tz->trips.critical.flags.enabled = 0;
printk("ACPI: Critical temperature reached (%ld C), shutting down.\n", KELVIN_TO_CELSIUS(tz->temperature));
reboot();
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;
sprintf(tz->name, "%s", device->pnp.bus_id);
sprintf(acpi_device_name(device), "%s", ACPI_THERMAL_DEVICE_NAME);
sprintf(acpi_device_class(device), "%s", 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 void iwl5150_temperature(struct iwl_priv *priv)
{
u32 vt = 0;
s32 offset = iwl_temp_calib_to_offset(priv);
vt = le32_to_cpu(priv->statistics.general.temperature);
vt = vt / IWL_5150_VOLTAGE_TO_TEMPERATURE_COEFF + offset;
/* now vt hold the temperature in Kelvin */
priv->temperature = KELVIN_TO_CELSIUS(vt);
}
static void iwl5150_temperature(struct iwl_priv *priv)
{
u32 vt = 0;
s32 offset = iwl_temp_calib_to_offset(priv->shrd);
vt = le32_to_cpu(priv->statistics.common.temperature);
vt = vt / IWL_5150_VOLTAGE_TO_TEMPERATURE_COEFF + offset;
priv->temperature = KELVIN_TO_CELSIUS(vt);
iwl_tt_handler(priv);
}
static void iwl_bg_tt_work(struct work_struct *work)
{
struct iwl_priv *priv = container_of(work, struct iwl_priv, tt_work);
s32 temp = priv->temperature; /* degrees CELSIUS except 4965 */
if (test_bit(STATUS_EXIT_PENDING, &priv->status))
return;
if ((priv->hw_rev & CSR_HW_REV_TYPE_MSK) == CSR_HW_REV_TYPE_4965)
temp = KELVIN_TO_CELSIUS(priv->temperature);
if (!priv->thermal_throttle.advanced_tt)
iwl_legacy_tt_handler(priv, temp, false);
else
iwl_advance_tt_handler(priv, temp, false);
}
bool iwl_within_ct_kill_margin(struct iwl_priv *priv)
{
s32 temp = priv->temperature; /* degrees CELSIUS except 4965 */
bool within_margin = false;
if ((priv->hw_rev & CSR_HW_REV_TYPE_MSK) == CSR_HW_REV_TYPE_4965)
temp = KELVIN_TO_CELSIUS(priv->temperature);
if (!priv->thermal_throttle.advanced_tt)
within_margin = ((temp + IWL_TT_CT_KILL_MARGIN) >=
CT_KILL_THRESHOLD_LEGACY) ? true : false;
else
within_margin = ((temp + IWL_TT_CT_KILL_MARGIN) >=
CT_KILL_THRESHOLD) ? true : false;
return within_margin;
}
static int acpi_thermal_add(struct acpi_device *device)
{
int result = 0;
struct acpi_thermal *tz = NULL;
if (!device)
return -EINVAL;
tz = kzalloc(sizeof(struct acpi_thermal), GFP_KERNEL);
if (!tz)
return -ENOMEM;
tz->device = device;
strcpy(tz->name, device->pnp.bus_id);
strcpy(acpi_device_name(device), ACPI_THERMAL_DEVICE_NAME);
strcpy(acpi_device_class(device), ACPI_THERMAL_CLASS);
device->driver_data = tz;
mutex_init(&tz->lock);
result = acpi_thermal_get_info(tz);
if (result)
goto free_memory;
acpi_thermal_guess_offset(tz);
result = acpi_thermal_register_thermal_zone(tz);
if (result)
goto free_memory;
printk(KERN_INFO PREFIX "%s [%s] (%ld C)\n",
acpi_device_name(device), acpi_device_bid(device),
KELVIN_TO_CELSIUS(tz->temperature));
goto end;
free_memory:
kfree(tz);
end:
return result;
}
static int
acpi_thermal_read_temperature (
char *page,
char **start,
off_t off,
int count,
int *eof,
void *data)
{
int result = 0;
struct acpi_thermal *tz = (struct acpi_thermal *) data;
char *p = page;
int len = 0;
ACPI_FUNCTION_TRACE("acpi_thermal_read_temperature");
if (!tz || (off != 0))
goto end;
result = acpi_thermal_get_temperature(tz);
if (result)
goto end;
p += sprintf(p, "temperature: %ld C\n",
KELVIN_TO_CELSIUS(tz->temperature));
end:
len = (p - page);
if (len <= off+count) *eof = 1;
*start = page + off;
len -= off;
if (len>count) len = count;
if (len<0) len = 0;
return_VALUE(len);
}
static int
acpi_thermal_read_trip_points (
char *page,
char **start,
off_t off,
int count,
int *eof,
void *data)
{
struct acpi_thermal *tz = (struct acpi_thermal *) data;
char *p = page;
int len = 0;
int i = 0;
int j = 0;
ACPI_FUNCTION_TRACE("acpi_thermal_read_trip_points");
if (!tz || (off != 0))
goto end;
if (tz->trips.critical.flags.valid)
p += sprintf(p, "critical (S5): %ld C\n",
KELVIN_TO_CELSIUS(tz->trips.critical.temperature));
if (tz->trips.hot.flags.valid)
p += sprintf(p, "hot (S4): %ld C\n",
KELVIN_TO_CELSIUS(tz->trips.hot.temperature));
if (tz->trips.passive.flags.valid) {
p += sprintf(p, "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++) {
p += sprintf(p, "0x%p ", tz->trips.passive.devices.handles[j]);
}
p += sprintf(p, "\n");
}
for (i=0; i<ACPI_THERMAL_MAX_ACTIVE; i++) {
if (!(tz->trips.active[i].flags.valid))
break;
p += sprintf(p, "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++)
p += sprintf(p, "0x%p ",
tz->trips.active[i].devices.handles[j]);
p += sprintf(p, "\n");
}
end:
len = (p - page);
if (len <= off+count) *eof = 1;
*start = page + off;
len -= off;
if (len>count) len = count;
if (len<0) len = 0;
return_VALUE(len);
}
static int
acpi_thermal_get_trip_points (
struct acpi_thermal *tz)
{
acpi_status status = AE_OK;
int i = 0;
ACPI_FUNCTION_TRACE("acpi_thermal_get_trip_points");
if (!tz)
return_VALUE(-EINVAL);
/* Critical Shutdown (required) */
status = acpi_evaluate_integer(tz->handle, "_CRT", NULL,
&tz->trips.critical.temperature);
if (ACPI_FAILURE(status)) {
tz->trips.critical.flags.valid = 0;
ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "No critical threshold\n"));
return_VALUE(-ENODEV);
}
else {
tz->trips.critical.flags.valid = 1;
printk( "ACPI: Found critical threshold [%lu]\n", KELVIN_TO_CELSIUS(tz->trips.critical.temperature));
}
/* Critical Sleep (optional) */
status = acpi_evaluate_integer(tz->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;
printk( "ACPI: Found hot threshold [%lu]\n", KELVIN_TO_CELSIUS(tz->trips.hot.temperature));
}
/* Passive: Processors (optional) */
status = acpi_evaluate_integer(tz->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->handle, "_TC1", NULL, &tz->trips.passive.tc1);
if (ACPI_FAILURE(status))
tz->trips.passive.flags.valid = 0;
status = acpi_evaluate_integer(tz->handle, "_TC2", NULL, &tz->trips.passive.tc2);
if (ACPI_FAILURE(status))
tz->trips.passive.flags.valid = 0;
status = acpi_evaluate_integer(tz->handle, "_TSP", NULL, &tz->trips.passive.tsp);
if (ACPI_FAILURE(status))
tz->trips.passive.flags.valid = 0;
status = acpi_evaluate_reference(tz->handle, "_PSL", NULL, &tz->trips.passive.devices);
if (ACPI_FAILURE(status))
tz->trips.passive.flags.valid = 0;
if (!tz->trips.passive.flags.valid)
ACPI_DEBUG_PRINT((ACPI_DB_WARN, "Invalid passive threshold\n"));
else
printk( "ACPI: Found passive threshold [%lu]\n", KELVIN_TO_CELSIUS(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->handle, name, NULL, &tz->trips.active[i].temperature);
if (ACPI_FAILURE(status))
break;
name[2] = 'L';
status = acpi_evaluate_reference(tz->handle, name, NULL, &tz->trips.active[i].devices);
if (ACPI_SUCCESS(status)) {
tz->trips.active[i].flags.valid = 1;
printk( "ACPI: Found active threshold [%d]:[%lu]\n", i, KELVIN_TO_CELSIUS(tz->trips.active[i].temperature));
}
else
ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid active threshold [%d]\n", i));
}
return_VALUE(0);
}
