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-rw-r--r--cleopatre/linux-2.6.25.10-spc300/drivers/acpi/thermal.c1825
1 files changed, 1825 insertions, 0 deletions
diff --git a/cleopatre/linux-2.6.25.10-spc300/drivers/acpi/thermal.c b/cleopatre/linux-2.6.25.10-spc300/drivers/acpi/thermal.c
new file mode 100644
index 0000000000..1bcecc7dd2
--- /dev/null
+++ b/cleopatre/linux-2.6.25.10-spc300/drivers/acpi/thermal.c
@@ -0,0 +1,1825 @@
+/*
+ * 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/dmi.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/proc_fs.h>
+#include <linux/timer.h>
+#include <linux/jiffies.h>
+#include <linux/kmod.h>
+#include <linux/seq_file.h>
+#include <linux/reboot.h>
+#include <asm/uaccess.h>
+#include <linux/thermal.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_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_MAX_ACTIVE 10
+#define ACPI_THERMAL_MAX_LIMIT_STR_LEN 65
+
+#define _COMPONENT ACPI_THERMAL_COMPONENT
+ACPI_MODULE_NAME("thermal");
+
+MODULE_AUTHOR("Paul Diefenbaugh");
+MODULE_DESCRIPTION("ACPI Thermal Zone Driver");
+MODULE_LICENSE("GPL");
+
+static int act;
+module_param(act, int, 0644);
+MODULE_PARM_DESC(act, "Disable or override all lowest active trip points.");
+
+static int crt;
+module_param(crt, int, 0644);
+MODULE_PARM_DESC(crt, "Disable or lower all critical trip points.");
+
+static int tzp;
+module_param(tzp, int, 0444);
+MODULE_PARM_DESC(tzp, "Thermal zone polling frequency, in 1/10 seconds.");
+
+static int nocrt;
+module_param(nocrt, int, 0);
+MODULE_PARM_DESC(nocrt, "Set to take no action upon ACPI thermal zone critical trips points.");
+
+static int off;
+module_param(off, int, 0);
+MODULE_PARM_DESC(off, "Set to disable ACPI thermal support.");
+
+static int psv;
+module_param(psv, int, 0644);
+MODULE_PARM_DESC(psv, "Disable or override all passive trip points.");
+
+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 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 const struct acpi_device_id thermal_device_ids[] = {
+ {ACPI_THERMAL_HID, 0},
+ {"", 0},
+};
+MODULE_DEVICE_TABLE(acpi, thermal_device_ids);
+
+static struct acpi_driver acpi_thermal_driver = {
+ .name = "thermal",
+ .class = ACPI_THERMAL_CLASS,
+ .ids = thermal_device_ids,
+ .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;
+ 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;
+ struct thermal_zone_device *thermal_zone;
+ int tz_enabled;
+ struct mutex lock;
+};
+
+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,
+ .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;
+
+ return 0;
+}
+
+#define ACPI_TRIPS_CRITICAL 0x01
+#define ACPI_TRIPS_HOT 0x02
+#define ACPI_TRIPS_PASSIVE 0x04
+#define ACPI_TRIPS_ACTIVE 0x08
+#define ACPI_TRIPS_DEVICES 0x10
+
+#define ACPI_TRIPS_REFRESH_THRESHOLDS (ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE)
+#define ACPI_TRIPS_REFRESH_DEVICES ACPI_TRIPS_DEVICES
+
+#define ACPI_TRIPS_INIT (ACPI_TRIPS_CRITICAL | ACPI_TRIPS_HOT | \
+ ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE | \
+ ACPI_TRIPS_DEVICES)
+
+/*
+ * This exception is thrown out in two cases:
+ * 1.An invalid trip point becomes invalid or a valid trip point becomes invalid
+ * when re-evaluating the AML code.
+ * 2.TODO: Devices listed in _PSL, _ALx, _TZD may change.
+ * We need to re-bind the cooling devices of a thermal zone when this occurs.
+ */
+#define ACPI_THERMAL_TRIPS_EXCEPTION(flags, str) \
+do { \
+ if (flags != ACPI_TRIPS_INIT) \
+ ACPI_EXCEPTION((AE_INFO, AE_ERROR, \
+ "ACPI thermal trip point %s changed\n" \
+ "Please send acpidump to linux-acpi@vger.kernel.org\n", str)); \
+} while (0)
+
+static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag)
+{
+ acpi_status status = AE_OK;
+ struct acpi_handle_list devices;
+ int valid = 0;
+ int i;
+
+ /* Critical Shutdown (required) */
+ if (flag & ACPI_TRIPS_CRITICAL) {
+ 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));
+ }
+ if (tz->trips.critical.flags.valid == 1) {
+ if (crt == -1) {
+ tz->trips.critical.flags.valid = 0;
+ } else if (crt > 0) {
+ unsigned long crt_k = CELSIUS_TO_KELVIN(crt);
+ /*
+ * Allow override to lower critical threshold
+ */
+ if (crt_k < tz->trips.critical.temperature)
+ tz->trips.critical.temperature = crt_k;
+ }
+ }
+ }
+
+ /* Critical Sleep (optional) */
+ if (flag & ACPI_TRIPS_HOT) {
+ 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.critical.temperature));
+ }
+ }
+
+ /* Passive (optional) */
+ if (flag & ACPI_TRIPS_PASSIVE) {
+ valid = tz->trips.passive.flags.valid;
+ if (psv == -1) {
+ status = AE_SUPPORT;
+ } else if (psv > 0) {
+ tz->trips.passive.temperature = CELSIUS_TO_KELVIN(psv);
+ status = AE_OK;
+ } else {
+ status = acpi_evaluate_integer(tz->device->handle,
+ "_PSV", NULL, &tz->trips.passive.temperature);
+ }
+
+ if (ACPI_FAILURE(status))
+ tz->trips.passive.flags.valid = 0;
+ else {
+ tz->trips.passive.flags.valid = 1;
+ if (flag == ACPI_TRIPS_INIT) {
+ 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;
+ }
+ }
+ }
+ if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.passive.flags.valid) {
+ memset(&devices, 0, sizeof(struct acpi_handle_list));
+ status = acpi_evaluate_reference(tz->device->handle, "_PSL",
+ NULL, &devices);
+ if (ACPI_FAILURE(status))
+ tz->trips.passive.flags.valid = 0;
+ else
+ tz->trips.passive.flags.valid = 1;
+
+ if (memcmp(&tz->trips.passive.devices, &devices,
+ sizeof(struct acpi_handle_list))) {
+ memcpy(&tz->trips.passive.devices, &devices,
+ sizeof(struct acpi_handle_list));
+ ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device");
+ }
+ }
+ if ((flag & ACPI_TRIPS_PASSIVE) || (flag & ACPI_TRIPS_DEVICES)) {
+ if (valid != tz->trips.passive.flags.valid)
+ ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state");
+ }
+
+ /* Active (optional) */
+ for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
+ char name[5] = { '_', 'A', 'C', ('0' + i), '\0' };
+ valid = tz->trips.active[i].flags.valid;
+
+ if (act == -1)
+ break; /* disable all active trip points */
+
+ if (flag & ACPI_TRIPS_ACTIVE) {
+ status = acpi_evaluate_integer(tz->device->handle,
+ name, NULL, &tz->trips.active[i].temperature);
+ if (ACPI_FAILURE(status)) {
+ tz->trips.active[i].flags.valid = 0;
+ if (i == 0)
+ break;
+ if (act <= 0)
+ break;
+ if (i == 1)
+ tz->trips.active[0].temperature =
+ CELSIUS_TO_KELVIN(act);
+ else
+ /*
+ * Don't allow override higher than
+ * the next higher trip point
+ */
+ tz->trips.active[i - 1].temperature =
+ (tz->trips.active[i - 2].temperature <
+ CELSIUS_TO_KELVIN(act) ?
+ tz->trips.active[i - 2].temperature :
+ CELSIUS_TO_KELVIN(act));
+ break;
+ } else
+ tz->trips.active[i].flags.valid = 1;
+ }
+
+ name[2] = 'L';
+ if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.active[i].flags.valid ) {
+ memset(&devices, 0, sizeof(struct acpi_handle_list));
+ status = acpi_evaluate_reference(tz->device->handle,
+ name, NULL, &devices);
+ if (ACPI_FAILURE(status))
+ tz->trips.active[i].flags.valid = 0;
+ else
+ tz->trips.active[i].flags.valid = 1;
+
+ if (memcmp(&tz->trips.active[i].devices, &devices,
+ sizeof(struct acpi_handle_list))) {
+ memcpy(&tz->trips.active[i].devices, &devices,
+ sizeof(struct acpi_handle_list));
+ ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device");
+ }
+ }
+ if ((flag & ACPI_TRIPS_ACTIVE) || (flag & ACPI_TRIPS_DEVICES))
+ if (valid != tz->trips.active[i].flags.valid)
+ ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state");
+
+ if (!tz->trips.active[i].flags.valid)
+ break;
+ }
+
+ if (flag & ACPI_TRIPS_DEVICES) {
+ memset(&devices, 0, sizeof(struct acpi_handle_list));
+ status = acpi_evaluate_reference(tz->device->handle, "_TZD",
+ NULL, &devices);
+ if (memcmp(&tz->devices, &devices,
+ sizeof(struct acpi_handle_list))) {
+ memcpy(&tz->devices, &devices,
+ sizeof(struct acpi_handle_list));
+ ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device");
+ }
+ }
+
+ return 0;
+}
+
+static int acpi_thermal_get_trip_points(struct acpi_thermal *tz)
+{
+ return acpi_thermal_trips_update(tz, ACPI_TRIPS_INIT);
+}
+
+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;
+
+ acpi_bus_generate_proc_event(tz->device, ACPI_THERMAL_NOTIFY_CRITICAL,
+ tz->trips.critical.flags.enabled);
+ acpi_bus_generate_netlink_event(tz->device->pnp.device_class,
+ tz->device->dev.bus_id,
+ ACPI_THERMAL_NOTIFY_CRITICAL,
+ tz->trips.critical.flags.enabled);
+
+ /* take no action if nocrt is set */
+ if(!nocrt) {
+ printk(KERN_EMERG
+ "Critical temperature reached (%ld C), shutting down.\n",
+ KELVIN_TO_CELSIUS(tz->temperature));
+ orderly_poweroff(true);
+ }
+
+ 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_proc_event(tz->device, ACPI_THERMAL_NOTIFY_HOT,
+ tz->trips.hot.flags.enabled);
+ acpi_bus_generate_netlink_event(tz->device->pnp.device_class,
+ tz->device->dev.bus_id,
+ ACPI_THERMAL_NOTIFY_HOT,
+ tz->trips.hot.flags.enabled);
+
+ /* TBD: Call user-mode "sleep(S4)" function if nocrt is cleared */
+
+ 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;
+ unsigned long timeout_jiffies = 0;
+ int i = 0;
+ struct acpi_thermal_state state;
+
+
+ if (!tz) {
+ printk(KERN_ERR PREFIX "Invalid (NULL) context\n");
+ return;
+ }
+
+ /* Check if someone else is already running */
+ if (!mutex_trylock(&tz->lock))
+ return;
+
+ state = tz->state;
+
+ result = acpi_thermal_get_temperature(tz);
+ if (result)
+ goto unlock;
+
+ if (!tz->tz_enabled)
+ goto unlock;
+
+ 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;
+ timeout_jiffies = jiffies + (HZ * sleep_time) / 1000;
+ } else if (tz->polling_frequency > 0) {
+ sleep_time = tz->polling_frequency * 100;
+ timeout_jiffies = round_jiffies(jiffies + (HZ * sleep_time) / 1000);
+ }
+
+ 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), timeout_jiffies);
+ else {
+ tz->timer.data = (unsigned long)tz;
+ tz->timer.function = acpi_thermal_run;
+ tz->timer.expires = timeout_jiffies;
+ add_timer(&(tz->timer));
+ }
+ }
+ unlock:
+ mutex_unlock(&tz->lock);
+}
+
+/* sys I/F for generic thermal sysfs support */
+#define KELVIN_TO_MILLICELSIUS(t) (t * 100 - 273200)
+
+static int thermal_get_temp(struct thermal_zone_device *thermal, char *buf)
+{
+ struct acpi_thermal *tz = thermal->devdata;
+
+ if (!tz)
+ return -EINVAL;
+
+ return sprintf(buf, "%ld\n", KELVIN_TO_MILLICELSIUS(tz->temperature));
+}
+
+static const char enabled[] = "kernel";
+static const char disabled[] = "user";
+static int thermal_get_mode(struct thermal_zone_device *thermal,
+ char *buf)
+{
+ struct acpi_thermal *tz = thermal->devdata;
+
+ if (!tz)
+ return -EINVAL;
+
+ return sprintf(buf, "%s\n", tz->tz_enabled ?
+ enabled : disabled);
+}
+
+static int thermal_set_mode(struct thermal_zone_device *thermal,
+ const char *buf)
+{
+ struct acpi_thermal *tz = thermal->devdata;
+ int enable;
+
+ if (!tz)
+ return -EINVAL;
+
+ /*
+ * enable/disable thermal management from ACPI thermal driver
+ */
+ if (!strncmp(buf, enabled, sizeof enabled - 1))
+ enable = 1;
+ else if (!strncmp(buf, disabled, sizeof disabled - 1))
+ enable = 0;
+ else
+ return -EINVAL;
+
+ if (enable != tz->tz_enabled) {
+ tz->tz_enabled = enable;
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+ "%s ACPI thermal control\n",
+ tz->tz_enabled ? enabled : disabled));
+ acpi_thermal_check(tz);
+ }
+ return 0;
+}
+
+static int thermal_get_trip_type(struct thermal_zone_device *thermal,
+ int trip, char *buf)
+{
+ struct acpi_thermal *tz = thermal->devdata;
+ int i;
+
+ if (!tz || trip < 0)
+ return -EINVAL;
+
+ if (tz->trips.critical.flags.valid) {
+ if (!trip)
+ return sprintf(buf, "critical\n");
+ trip--;
+ }
+
+ if (tz->trips.hot.flags.valid) {
+ if (!trip)
+ return sprintf(buf, "hot\n");
+ trip--;
+ }
+
+ if (tz->trips.passive.flags.valid) {
+ if (!trip)
+ return sprintf(buf, "passive\n");
+ trip--;
+ }
+
+ for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE &&
+ tz->trips.active[i].flags.valid; i++) {
+ if (!trip)
+ return sprintf(buf, "active%d\n", i);
+ trip--;
+ }
+
+ return -EINVAL;
+}
+
+static int thermal_get_trip_temp(struct thermal_zone_device *thermal,
+ int trip, char *buf)
+{
+ struct acpi_thermal *tz = thermal->devdata;
+ int i;
+
+ if (!tz || trip < 0)
+ return -EINVAL;
+
+ if (tz->trips.critical.flags.valid) {
+ if (!trip)
+ return sprintf(buf, "%ld\n", KELVIN_TO_MILLICELSIUS(
+ tz->trips.critical.temperature));
+ trip--;
+ }
+
+ if (tz->trips.hot.flags.valid) {
+ if (!trip)
+ return sprintf(buf, "%ld\n", KELVIN_TO_MILLICELSIUS(
+ tz->trips.hot.temperature));
+ trip--;
+ }
+
+ if (tz->trips.passive.flags.valid) {
+ if (!trip)
+ return sprintf(buf, "%ld\n", KELVIN_TO_MILLICELSIUS(
+ tz->trips.passive.temperature));
+ trip--;
+ }
+
+ for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE &&
+ tz->trips.active[i].flags.valid; i++) {
+ if (!trip)
+ return sprintf(buf, "%ld\n", KELVIN_TO_MILLICELSIUS(
+ tz->trips.active[i].temperature));
+ trip--;
+ }
+
+ return -EINVAL;
+}
+
+typedef int (*cb)(struct thermal_zone_device *, int,
+ struct thermal_cooling_device *);
+static int acpi_thermal_cooling_device_cb(struct thermal_zone_device *thermal,
+ struct thermal_cooling_device *cdev,
+ cb action)
+{
+ struct acpi_device *device = cdev->devdata;
+ struct acpi_thermal *tz = thermal->devdata;
+ struct acpi_device *dev;
+ acpi_status status;
+ acpi_handle handle;
+ int i;
+ int j;
+ int trip = -1;
+ int result = 0;
+
+ if (tz->trips.critical.flags.valid)
+ trip++;
+
+ if (tz->trips.hot.flags.valid)
+ trip++;
+
+ if (tz->trips.passive.flags.valid) {
+ trip++;
+ for (i = 0; i < tz->trips.passive.devices.count;
+ i++) {
+ handle = tz->trips.passive.devices.handles[i];
+ status = acpi_bus_get_device(handle, &dev);
+ if (ACPI_SUCCESS(status) && (dev == device)) {
+ result = action(thermal, trip, cdev);
+ if (result)
+ goto failed;
+ }
+ }
+ }
+
+ for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
+ if (!tz->trips.active[i].flags.valid)
+ break;
+ trip++;
+ for (j = 0;
+ j < tz->trips.active[i].devices.count;
+ j++) {
+ handle = tz->trips.active[i].devices.handles[j];
+ status = acpi_bus_get_device(handle, &dev);
+ if (ACPI_SUCCESS(status) && (dev == device)) {
+ result = action(thermal, trip, cdev);
+ if (result)
+ goto failed;
+ }
+ }
+ }
+
+ for (i = 0; i < tz->devices.count; i++) {
+ handle = tz->devices.handles[i];
+ status = acpi_bus_get_device(handle, &dev);
+ if (ACPI_SUCCESS(status) && (dev == device)) {
+ result = action(thermal, -1, cdev);
+ if (result)
+ goto failed;
+ }
+ }
+
+failed:
+ return result;
+}
+
+static int
+acpi_thermal_bind_cooling_device(struct thermal_zone_device *thermal,
+ struct thermal_cooling_device *cdev)
+{
+ return acpi_thermal_cooling_device_cb(thermal, cdev,
+ thermal_zone_bind_cooling_device);
+}
+
+static int
+acpi_thermal_unbind_cooling_device(struct thermal_zone_device *thermal,
+ struct thermal_cooling_device *cdev)
+{
+ return acpi_thermal_cooling_device_cb(thermal, cdev,
+ thermal_zone_unbind_cooling_device);
+}
+
+static struct thermal_zone_device_ops acpi_thermal_zone_ops = {
+ .bind = acpi_thermal_bind_cooling_device,
+ .unbind = acpi_thermal_unbind_cooling_device,
+ .get_temp = thermal_get_temp,
+ .get_mode = thermal_get_mode,
+ .set_mode = thermal_set_mode,
+ .get_trip_type = thermal_get_trip_type,
+ .get_trip_temp = thermal_get_trip_temp,
+};
+
+static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz)
+{
+ int trips = 0;
+ int result;
+ acpi_status status;
+ int i;
+
+ if (tz->trips.critical.flags.valid)
+ trips++;
+
+ if (tz->trips.hot.flags.valid)
+ trips++;
+
+ if (tz->trips.passive.flags.valid)
+ trips++;
+
+ for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE &&
+ tz->trips.active[i].flags.valid; i++, trips++);
+ tz->thermal_zone = thermal_zone_device_register("ACPI thermal zone",
+ trips, tz, &acpi_thermal_zone_ops);
+ if (IS_ERR(tz->thermal_zone))
+ return -ENODEV;
+
+ result = sysfs_create_link(&tz->device->dev.kobj,
+ &tz->thermal_zone->device.kobj, "thermal_zone");
+ if (result)
+ return result;
+
+ result = sysfs_create_link(&tz->thermal_zone->device.kobj,
+ &tz->device->dev.kobj, "device");
+ if (result)
+ return result;
+
+ status = acpi_attach_data(tz->device->handle,
+ acpi_bus_private_data_handler,
+ tz->thermal_zone);
+ if (ACPI_FAILURE(status)) {
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
+ "Error attaching device data\n"));
+ return -ENODEV;
+ }
+
+ tz->tz_enabled = 1;
+
+ printk(KERN_INFO PREFIX "%s is registered as thermal_zone%d\n",
+ tz->device->dev.bus_id, tz->thermal_zone->id);
+ return 0;
+}
+
+static void acpi_thermal_unregister_thermal_zone(struct acpi_thermal *tz)
+{
+ sysfs_remove_link(&tz->device->dev.kobj, "thermal_zone");
+ sysfs_remove_link(&tz->thermal_zone->device.kobj, "device");
+ thermal_zone_device_unregister(tz->thermal_zone);
+ tz->thermal_zone = NULL;
+ acpi_detach_data(tz->device->handle, acpi_bus_private_data_handler);
+}
+
+
+/* --------------------------------------------------------------------------
+ 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;
+ struct acpi_device *device;
+ acpi_status status;
+
+ int i = 0;
+ int j = 0;
+
+
+ if (!tz)
+ goto end;
+
+ if (tz->trips.critical.flags.valid)
+ seq_printf(seq, "critical (S5): %ld C%s",
+ KELVIN_TO_CELSIUS(tz->trips.critical.temperature),
+ nocrt ? " <disabled>\n" : "\n");
+
+ if (tz->trips.hot.flags.valid)
+ seq_printf(seq, "hot (S4): %ld C%s",
+ KELVIN_TO_CELSIUS(tz->trips.hot.temperature),
+ nocrt ? " <disabled>\n" : "\n");
+
+ 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++) {
+ status = acpi_bus_get_device(tz->trips.passive.devices.
+ handles[j], &device);
+ seq_printf(seq, "%4.4s ", status ? "" :
+ acpi_device_bid(device));
+ }
+ 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++){
+ status = acpi_bus_get_device(tz->trips.active[i].
+ devices.handles[j],
+ &device);
+ seq_printf(seq, "%4.4s ", status ? "" :
+ acpi_device_bid(device));
+ }
+ 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 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");
+ else
+ seq_puts(seq, "0 - Active; 1 - Passive\n");
+
+ 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] */
+ entry = create_proc_entry(ACPI_THERMAL_FILE_TRIP_POINTS,
+ S_IRUGO,
+ 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_trips_update(tz, ACPI_TRIPS_REFRESH_THRESHOLDS);
+ acpi_thermal_check(tz);
+ acpi_bus_generate_proc_event(device, event, 0);
+ acpi_bus_generate_netlink_event(device->pnp.device_class,
+ device->dev.bus_id, event, 0);
+ break;
+ case ACPI_THERMAL_NOTIFY_DEVICES:
+ acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_DEVICES);
+ acpi_thermal_check(tz);
+ acpi_bus_generate_proc_event(device, event, 0);
+ acpi_bus_generate_netlink_event(device->pnp.device_class,
+ device->dev.bus_id, 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;
+
+ /* Get default polling frequency [_TZP] (optional) */
+ if (tzp)
+ tz->polling_frequency = tzp;
+ else
+ acpi_thermal_get_polling_frequency(tz);
+
+ 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;
+ mutex_init(&tz->lock);
+
+
+ result = acpi_thermal_get_info(tz);
+ if (result)
+ goto free_memory;
+
+ result = acpi_thermal_register_thermal_zone(tz);
+ if (result)
+ goto free_memory;
+
+ result = acpi_thermal_add_fs(device);
+ if (result)
+ goto unregister_thermal_zone;
+
+ 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 remove_fs;
+ }
+
+ printk(KERN_INFO PREFIX "%s [%s] (%ld C)\n",
+ acpi_device_name(device), acpi_device_bid(device),
+ KELVIN_TO_CELSIUS(tz->temperature));
+ goto end;
+
+remove_fs:
+ acpi_thermal_remove_fs(device);
+unregister_thermal_zone:
+ thermal_zone_device_unregister(tz->thermal_zone);
+free_memory:
+ kfree(tz);
+end:
+ 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);
+ acpi_thermal_unregister_thermal_zone(tz);
+ mutex_destroy(&tz->lock);
+ kfree(tz);
+ return 0;
+}
+
+static int acpi_thermal_resume(struct acpi_device *device)
+{
+ struct acpi_thermal *tz = NULL;
+ int i, j, power_state, result;
+
+
+ if (!device || !acpi_driver_data(device))
+ return -EINVAL;
+
+ tz = acpi_driver_data(device);
+
+ for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
+ if (!(&tz->trips.active[i]))
+ break;
+ if (!tz->trips.active[i].flags.valid)
+ break;
+ tz->trips.active[i].flags.enabled = 1;
+ for (j = 0; j < tz->trips.active[i].devices.count; j++) {
+ result = acpi_bus_get_power(tz->trips.active[i].devices.
+ handles[j], &power_state);
+ if (result || (power_state != ACPI_STATE_D0)) {
+ tz->trips.active[i].flags.enabled = 0;
+ break;
+ }
+ }
+ tz->state.active |= tz->trips.active[i].flags.enabled;
+ }
+
+ acpi_thermal_check(tz);
+
+ return AE_OK;
+}
+
+#ifdef CONFIG_DMI
+static int thermal_act(const struct dmi_system_id *d) {
+
+ if (act == 0) {
+ printk(KERN_NOTICE "ACPI: %s detected: "
+ "disabling all active thermal trip points\n", d->ident);
+ act = -1;
+ }
+ return 0;
+}
+static int thermal_nocrt(const struct dmi_system_id *d) {
+
+ printk(KERN_NOTICE "ACPI: %s detected: "
+ "disabling all critical thermal trip point actions.\n", d->ident);
+ nocrt = 1;
+ return 0;
+}
+static int thermal_tzp(const struct dmi_system_id *d) {
+
+ if (tzp == 0) {
+ printk(KERN_NOTICE "ACPI: %s detected: "
+ "enabling thermal zone polling\n", d->ident);
+ tzp = 300; /* 300 dS = 30 Seconds */
+ }
+ return 0;
+}
+static int thermal_psv(const struct dmi_system_id *d) {
+
+ if (psv == 0) {
+ printk(KERN_NOTICE "ACPI: %s detected: "
+ "disabling all passive thermal trip points\n", d->ident);
+ psv = -1;
+ }
+ return 0;
+}
+
+static struct dmi_system_id thermal_dmi_table[] __initdata = {
+ /*
+ * Award BIOS on this AOpen makes thermal control almost worthless.
+ * http://bugzilla.kernel.org/show_bug.cgi?id=8842
+ */
+ {
+ .callback = thermal_act,
+ .ident = "AOpen i915GMm-HFS",
+ .matches = {
+ DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
+ DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
+ },
+ },
+ {
+ .callback = thermal_psv,
+ .ident = "AOpen i915GMm-HFS",
+ .matches = {
+ DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
+ DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
+ },
+ },
+ {
+ .callback = thermal_tzp,
+ .ident = "AOpen i915GMm-HFS",
+ .matches = {
+ DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
+ DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
+ },
+ },
+ {
+ .callback = thermal_nocrt,
+ .ident = "Gigabyte GA-7ZX",
+ .matches = {
+ DMI_MATCH(DMI_BOARD_VENDOR, "Gigabyte Technology Co., Ltd."),
+ DMI_MATCH(DMI_BOARD_NAME, "7ZX"),
+ },
+ },
+ {}
+};
+#endif /* CONFIG_DMI */
+
+static int __init acpi_thermal_init(void)
+{
+ int result = 0;
+
+ dmi_check_system(thermal_dmi_table);
+
+ if (off) {
+ printk(KERN_NOTICE "ACPI: thermal control disabled\n");
+ return -ENODEV;
+ }
+ 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);