forked from Minki/linux
intel_menlo: introduce new platform specific driver
Intel menlow platform specific driver for thermal management extension. Signed-off-by: Thomas Sujith <sujith.thomas@intel.com> Signed-off-by: Zhang Rui <rui.zhang@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Thomas Sujith
Len Brown
parent
041d4bbf12
commit
cc0573b325
@ -232,4 +232,13 @@ config ATMEL_SSC
|
||||
|
||||
If unsure, say N.
|
||||
|
||||
config INTEL_MENLOW
|
||||
tristate "Thermal Management driver for Intel menlow platform"
|
||||
depends on ACPI_THERMAL
|
||||
---help---
|
||||
ACPI thermal management enhancement driver on
|
||||
Intel Menlow platform.
|
||||
|
||||
If unsure, say N.
|
||||
|
||||
endif # MISC_DEVICES
|
||||
|
||||
@ -17,3 +17,4 @@ obj-$(CONFIG_SONY_LAPTOP) += sony-laptop.o
|
||||
obj-$(CONFIG_THINKPAD_ACPI) += thinkpad_acpi.o
|
||||
obj-$(CONFIG_FUJITSU_LAPTOP) += fujitsu-laptop.o
|
||||
obj-$(CONFIG_EEPROM_93CX6) += eeprom_93cx6.o
|
||||
obj-$(CONFIG_INTEL_MENLOW) += intel_menlow.o
|
||||
|
||||
526
drivers/misc/intel_menlow.c
Normal file
526
drivers/misc/intel_menlow.c
Normal file
@ -0,0 +1,526 @@
|
||||
/*
|
||||
* intel_menlow.c - Intel menlow Driver for thermal management extension
|
||||
*
|
||||
* Copyright (C) 2008 Intel Corp
|
||||
* Copyright (C) 2008 Sujith Thomas <sujith.thomas@intel.com>
|
||||
* Copyright (C) 2008 Zhang Rui <rui.zhang@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; version 2 of the License.
|
||||
*
|
||||
* 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 creates the sys I/F for programming the sensors.
|
||||
* It also implements the driver for intel menlow memory controller (hardware
|
||||
* id is INT0002) which makes use of the platform specific ACPI methods
|
||||
* to get/set bandwidth.
|
||||
*/
|
||||
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/types.h>
|
||||
#include <linux/pci.h>
|
||||
#include <linux/pm.h>
|
||||
|
||||
#include <linux/thermal.h>
|
||||
#include <acpi/acpi_bus.h>
|
||||
#include <acpi/acpi_drivers.h>
|
||||
|
||||
MODULE_AUTHOR("Thomas Sujith");
|
||||
MODULE_AUTHOR("Zhang Rui");
|
||||
MODULE_DESCRIPTION("Intel Menlow platform specific driver");
|
||||
MODULE_LICENSE("GPL");
|
||||
|
||||
/*
|
||||
* Memory controller device control
|
||||
*/
|
||||
|
||||
#define MEMORY_GET_BANDWIDTH "GTHS"
|
||||
#define MEMORY_SET_BANDWIDTH "STHS"
|
||||
#define MEMORY_ARG_CUR_BANDWIDTH 1
|
||||
#define MEMORY_ARG_MAX_BANDWIDTH 0
|
||||
|
||||
static int memory_get_int_max_bandwidth(struct thermal_cooling_device *cdev,
|
||||
unsigned long *max_state)
|
||||
{
|
||||
struct acpi_device *device = cdev->devdata;
|
||||
acpi_handle handle = device->handle;
|
||||
unsigned long value;
|
||||
struct acpi_object_list arg_list;
|
||||
union acpi_object arg;
|
||||
acpi_status status = AE_OK;
|
||||
|
||||
arg_list.count = 1;
|
||||
arg_list.pointer = &arg;
|
||||
arg.type = ACPI_TYPE_INTEGER;
|
||||
arg.integer.value = MEMORY_ARG_MAX_BANDWIDTH;
|
||||
status = acpi_evaluate_integer(handle, MEMORY_GET_BANDWIDTH,
|
||||
&arg_list, &value);
|
||||
if (ACPI_FAILURE(status))
|
||||
return -EFAULT;
|
||||
|
||||
*max_state = value - 1;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int memory_get_max_bandwidth(struct thermal_cooling_device *cdev,
|
||||
char *buf)
|
||||
{
|
||||
unsigned long value;
|
||||
if (memory_get_int_max_bandwidth(cdev, &value))
|
||||
return -EINVAL;
|
||||
|
||||
return sprintf(buf, "%ld\n", value);
|
||||
}
|
||||
|
||||
static int memory_get_cur_bandwidth(struct thermal_cooling_device *cdev,
|
||||
char *buf)
|
||||
{
|
||||
struct acpi_device *device = cdev->devdata;
|
||||
acpi_handle handle = device->handle;
|
||||
unsigned long value;
|
||||
struct acpi_object_list arg_list;
|
||||
union acpi_object arg;
|
||||
acpi_status status = AE_OK;
|
||||
|
||||
arg_list.count = 1;
|
||||
arg_list.pointer = &arg;
|
||||
arg.type = ACPI_TYPE_INTEGER;
|
||||
arg.integer.value = MEMORY_ARG_CUR_BANDWIDTH;
|
||||
status = acpi_evaluate_integer(handle, MEMORY_GET_BANDWIDTH,
|
||||
&arg_list, &value);
|
||||
if (ACPI_FAILURE(status))
|
||||
return -EFAULT;
|
||||
|
||||
return sprintf(buf, "%ld\n", value);
|
||||
}
|
||||
|
||||
static int memory_set_cur_bandwidth(struct thermal_cooling_device *cdev,
|
||||
unsigned int state)
|
||||
{
|
||||
struct acpi_device *device = cdev->devdata;
|
||||
acpi_handle handle = device->handle;
|
||||
struct acpi_object_list arg_list;
|
||||
union acpi_object arg;
|
||||
acpi_status status;
|
||||
int temp;
|
||||
unsigned long max_state;
|
||||
|
||||
if (memory_get_int_max_bandwidth(cdev, &max_state))
|
||||
return -EFAULT;
|
||||
|
||||
if (max_state < 0 || state > max_state)
|
||||
return -EINVAL;
|
||||
|
||||
arg_list.count = 1;
|
||||
arg_list.pointer = &arg;
|
||||
arg.type = ACPI_TYPE_INTEGER;
|
||||
arg.integer.value = state;
|
||||
|
||||
status =
|
||||
acpi_evaluate_integer(handle, MEMORY_SET_BANDWIDTH, &arg_list,
|
||||
(unsigned long *)&temp);
|
||||
|
||||
printk(KERN_INFO
|
||||
"Bandwidth value was %d: status is %d\n", state, status);
|
||||
if (ACPI_FAILURE(status))
|
||||
return -EFAULT;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct thermal_cooling_device_ops memory_cooling_ops = {
|
||||
.get_max_state = memory_get_max_bandwidth,
|
||||
.get_cur_state = memory_get_cur_bandwidth,
|
||||
.set_cur_state = memory_set_cur_bandwidth,
|
||||
};
|
||||
|
||||
/*
|
||||
* Memory Device Management
|
||||
*/
|
||||
static int intel_menlow_memory_add(struct acpi_device *device)
|
||||
{
|
||||
int result = -ENODEV;
|
||||
acpi_status status = AE_OK;
|
||||
acpi_handle dummy;
|
||||
struct thermal_cooling_device *cdev;
|
||||
|
||||
if (!device)
|
||||
return -EINVAL;
|
||||
|
||||
status = acpi_get_handle(device->handle, MEMORY_GET_BANDWIDTH, &dummy);
|
||||
if (ACPI_FAILURE(status))
|
||||
goto end;
|
||||
|
||||
status = acpi_get_handle(device->handle, MEMORY_SET_BANDWIDTH, &dummy);
|
||||
if (ACPI_FAILURE(status))
|
||||
goto end;
|
||||
|
||||
cdev = thermal_cooling_device_register("Memory controller", device,
|
||||
&memory_cooling_ops);
|
||||
acpi_driver_data(device) = cdev;
|
||||
if (!cdev)
|
||||
result = -ENODEV;
|
||||
else {
|
||||
result = sysfs_create_link(&device->dev.kobj,
|
||||
&cdev->device.kobj, "thermal_cooling");
|
||||
if (result)
|
||||
goto unregister;
|
||||
|
||||
result = sysfs_create_link(&cdev->device.kobj,
|
||||
&device->dev.kobj, "device");
|
||||
if (result) {
|
||||
sysfs_remove_link(&device->dev.kobj, "thermal_cooling");
|
||||
goto unregister;
|
||||
}
|
||||
}
|
||||
|
||||
end:
|
||||
return result;
|
||||
|
||||
unregister:
|
||||
thermal_cooling_device_unregister(cdev);
|
||||
return result;
|
||||
|
||||
}
|
||||
|
||||
static int intel_menlow_memory_remove(struct acpi_device *device, int type)
|
||||
{
|
||||
struct thermal_cooling_device *cdev = acpi_driver_data(device);
|
||||
|
||||
if (!device || !cdev)
|
||||
return -EINVAL;
|
||||
|
||||
sysfs_remove_link(&device->dev.kobj, "thermal_cooling");
|
||||
sysfs_remove_link(&cdev->device.kobj, "device");
|
||||
thermal_cooling_device_unregister(cdev);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
const static struct acpi_device_id intel_menlow_memory_ids[] = {
|
||||
{"INT0002", 0},
|
||||
{"", 0},
|
||||
};
|
||||
|
||||
static struct acpi_driver intel_menlow_memory_driver = {
|
||||
.name = "intel_menlow_thermal_control",
|
||||
.ids = intel_menlow_memory_ids,
|
||||
.ops = {
|
||||
.add = intel_menlow_memory_add,
|
||||
.remove = intel_menlow_memory_remove,
|
||||
},
|
||||
};
|
||||
|
||||
/*
|
||||
* Sensor control on menlow platform
|
||||
*/
|
||||
|
||||
#define THERMAL_AUX0 0
|
||||
#define THERMAL_AUX1 1
|
||||
#define GET_AUX0 "GAX0"
|
||||
#define GET_AUX1 "GAX1"
|
||||
#define SET_AUX0 "SAX0"
|
||||
#define SET_AUX1 "SAX1"
|
||||
|
||||
struct intel_menlow_attribute {
|
||||
struct device_attribute attr;
|
||||
struct device *device;
|
||||
acpi_handle handle;
|
||||
struct list_head node;
|
||||
};
|
||||
|
||||
static LIST_HEAD(intel_menlow_attr_list);
|
||||
static DEFINE_MUTEX(intel_menlow_attr_lock);
|
||||
|
||||
/*
|
||||
* sensor_get_auxtrip - get the current auxtrip value from sensor
|
||||
* @name: Thermalzone name
|
||||
* @auxtype : AUX0/AUX1
|
||||
* @buf: syfs buffer
|
||||
*/
|
||||
static int sensor_get_auxtrip(acpi_handle handle, int index, int *value)
|
||||
{
|
||||
acpi_status status;
|
||||
|
||||
if ((index != 0 && index != 1) || !value)
|
||||
return -EINVAL;
|
||||
|
||||
status = acpi_evaluate_integer(handle, index ? GET_AUX1 : GET_AUX0,
|
||||
NULL, (unsigned long *)value);
|
||||
if (ACPI_FAILURE(status))
|
||||
return -EIO;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* sensor_set_auxtrip - set the new auxtrip value to sensor
|
||||
* @name: Thermalzone name
|
||||
* @auxtype : AUX0/AUX1
|
||||
* @buf: syfs buffer
|
||||
*/
|
||||
static int sensor_set_auxtrip(acpi_handle handle, int index, int value)
|
||||
{
|
||||
acpi_status status;
|
||||
union acpi_object arg = {
|
||||
ACPI_TYPE_INTEGER
|
||||
};
|
||||
struct acpi_object_list args = {
|
||||
1, &arg
|
||||
};
|
||||
int temp;
|
||||
|
||||
if (index != 0 && index != 1)
|
||||
return -EINVAL;
|
||||
|
||||
status = acpi_evaluate_integer(handle, index ? GET_AUX0 : GET_AUX1,
|
||||
NULL, (unsigned long *)&temp);
|
||||
if (ACPI_FAILURE(status))
|
||||
return -EIO;
|
||||
if ((index && value < temp) || (!index && value > temp))
|
||||
return -EINVAL;
|
||||
|
||||
arg.integer.value = value;
|
||||
status = acpi_evaluate_integer(handle, index ? SET_AUX1 : SET_AUX0,
|
||||
&args, (unsigned long *)&temp);
|
||||
if (ACPI_FAILURE(status))
|
||||
return -EIO;
|
||||
|
||||
/* do we need to check the return value of SAX0/SAX1 ? */
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
#define to_intel_menlow_attr(_attr) \
|
||||
container_of(_attr, struct intel_menlow_attribute, attr)
|
||||
|
||||
static ssize_t aux0_show(struct device *dev,
|
||||
struct device_attribute *dev_attr, char *buf)
|
||||
{
|
||||
struct intel_menlow_attribute *attr = to_intel_menlow_attr(dev_attr);
|
||||
int value;
|
||||
int result;
|
||||
|
||||
result = sensor_get_auxtrip(attr->handle, 0, &value);
|
||||
|
||||
return result ? result : sprintf(buf, "%lu", KELVIN_TO_CELSIUS(value));
|
||||
}
|
||||
|
||||
static ssize_t aux1_show(struct device *dev,
|
||||
struct device_attribute *dev_attr, char *buf)
|
||||
{
|
||||
struct intel_menlow_attribute *attr = to_intel_menlow_attr(dev_attr);
|
||||
int value;
|
||||
int result;
|
||||
|
||||
result = sensor_get_auxtrip(attr->handle, 1, &value);
|
||||
|
||||
return result ? result : sprintf(buf, "%lu", KELVIN_TO_CELSIUS(value));
|
||||
}
|
||||
|
||||
static ssize_t aux0_store(struct device *dev,
|
||||
struct device_attribute *dev_attr,
|
||||
const char *buf, size_t count)
|
||||
{
|
||||
struct intel_menlow_attribute *attr = to_intel_menlow_attr(dev_attr);
|
||||
int value;
|
||||
int result;
|
||||
|
||||
/*Sanity check; should be a positive integer */
|
||||
if (!sscanf(buf, "%d", &value))
|
||||
return -EINVAL;
|
||||
|
||||
if (value < 0)
|
||||
return -EINVAL;
|
||||
|
||||
result = sensor_set_auxtrip(attr->handle, 0, CELSIUS_TO_KELVIN(value));
|
||||
return result ? result : count;
|
||||
}
|
||||
|
||||
static ssize_t aux1_store(struct device *dev,
|
||||
struct device_attribute *dev_attr,
|
||||
const char *buf, size_t count)
|
||||
{
|
||||
struct intel_menlow_attribute *attr = to_intel_menlow_attr(dev_attr);
|
||||
int value;
|
||||
int result;
|
||||
|
||||
/*Sanity check; should be a positive integer */
|
||||
if (!sscanf(buf, "%d", &value))
|
||||
return -EINVAL;
|
||||
|
||||
if (value < 0)
|
||||
return -EINVAL;
|
||||
|
||||
result = sensor_set_auxtrip(attr->handle, 1, CELSIUS_TO_KELVIN(value));
|
||||
return result ? result : count;
|
||||
}
|
||||
|
||||
/* BIOS can enable/disable the thermal user application in dabney platform */
|
||||
#define BIOS_ENABLED "\\_TZ.GSTS"
|
||||
static ssize_t bios_enabled_show(struct device *dev,
|
||||
struct device_attribute *attr, char *buf)
|
||||
{
|
||||
acpi_status status;
|
||||
unsigned long bios_enabled;
|
||||
|
||||
status = acpi_evaluate_integer(NULL, BIOS_ENABLED, NULL, &bios_enabled);
|
||||
if (ACPI_FAILURE(status))
|
||||
return -ENODEV;
|
||||
|
||||
return sprintf(buf, "%s\n", bios_enabled ? "enabled" : "disabled");
|
||||
}
|
||||
|
||||
static int intel_menlow_add_one_attribute(char *name, int mode, void *show,
|
||||
void *store, struct device *dev,
|
||||
acpi_handle handle)
|
||||
{
|
||||
struct intel_menlow_attribute *attr;
|
||||
int result;
|
||||
|
||||
attr = kzalloc(sizeof(struct intel_menlow_attribute), GFP_KERNEL);
|
||||
if (!attr)
|
||||
return -ENOMEM;
|
||||
|
||||
attr->attr.attr.name = name;
|
||||
attr->attr.attr.mode = mode;
|
||||
attr->attr.show = show;
|
||||
attr->attr.store = store;
|
||||
attr->device = dev;
|
||||
attr->handle = handle;
|
||||
|
||||
result = device_create_file(dev, &attr->attr);
|
||||
if (result)
|
||||
return result;
|
||||
|
||||
mutex_lock(&intel_menlow_attr_lock);
|
||||
list_add_tail(&attr->node, &intel_menlow_attr_list);
|
||||
mutex_unlock(&intel_menlow_attr_lock);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static acpi_status intel_menlow_register_sensor(acpi_handle handle, u32 lvl,
|
||||
void *context, void **rv)
|
||||
{
|
||||
acpi_status status;
|
||||
acpi_handle dummy;
|
||||
struct thermal_zone_device *thermal;
|
||||
int result;
|
||||
|
||||
result = acpi_bus_get_private_data(handle, (void **)&thermal);
|
||||
if (result)
|
||||
return 0;
|
||||
|
||||
/* _TZ must have the AUX0/1 methods */
|
||||
status = acpi_get_handle(handle, GET_AUX0, &dummy);
|
||||
if (ACPI_FAILURE(status))
|
||||
goto not_found;
|
||||
|
||||
status = acpi_get_handle(handle, SET_AUX0, &dummy);
|
||||
if (ACPI_FAILURE(status))
|
||||
goto not_found;
|
||||
|
||||
result = intel_menlow_add_one_attribute("aux0", 0644,
|
||||
aux0_show, aux0_store,
|
||||
&thermal->device, handle);
|
||||
if (result)
|
||||
return AE_ERROR;
|
||||
|
||||
status = acpi_get_handle(handle, GET_AUX1, &dummy);
|
||||
if (ACPI_FAILURE(status))
|
||||
goto not_found;
|
||||
|
||||
status = acpi_get_handle(handle, SET_AUX1, &dummy);
|
||||
if (ACPI_FAILURE(status))
|
||||
goto not_found;
|
||||
|
||||
result = intel_menlow_add_one_attribute("aux1", 0644,
|
||||
aux1_show, aux1_store,
|
||||
&thermal->device, handle);
|
||||
if (result)
|
||||
return AE_ERROR;
|
||||
|
||||
/*
|
||||
* create the "dabney_enabled" attribute which means the user app
|
||||
* should be loaded or not
|
||||
*/
|
||||
|
||||
result = intel_menlow_add_one_attribute("bios_enabled", 0444,
|
||||
bios_enabled_show, NULL,
|
||||
&thermal->device, handle);
|
||||
if (result)
|
||||
return AE_ERROR;
|
||||
|
||||
not_found:
|
||||
if (status == AE_NOT_FOUND)
|
||||
return AE_OK;
|
||||
else
|
||||
return status;
|
||||
}
|
||||
|
||||
static void intel_menlow_unregister_sensor(void)
|
||||
{
|
||||
struct intel_menlow_attribute *pos, *next;
|
||||
|
||||
mutex_lock(&intel_menlow_attr_lock);
|
||||
list_for_each_entry_safe(pos, next, &intel_menlow_attr_list, node) {
|
||||
list_del(&pos->node);
|
||||
device_remove_file(pos->device, &pos->attr);
|
||||
kfree(pos);
|
||||
}
|
||||
mutex_unlock(&intel_menlow_attr_lock);
|
||||
|
||||
return;
|
||||
}
|
||||
|
||||
static int __init intel_menlow_module_init(void)
|
||||
{
|
||||
int result = -ENODEV;
|
||||
acpi_status status;
|
||||
unsigned long enable;
|
||||
|
||||
if (acpi_disabled)
|
||||
return result;
|
||||
|
||||
/* Looking for the \_TZ.GSTS method */
|
||||
status = acpi_evaluate_integer(NULL, BIOS_ENABLED, NULL, &enable);
|
||||
if (ACPI_FAILURE(status) || !enable)
|
||||
return -ENODEV;
|
||||
|
||||
/* Looking for ACPI device MEM0 with hardware id INT0002 */
|
||||
result = acpi_bus_register_driver(&intel_menlow_memory_driver);
|
||||
if (result)
|
||||
return result;
|
||||
|
||||
/* Looking for sensors in each ACPI thermal zone */
|
||||
status = acpi_walk_namespace(ACPI_TYPE_THERMAL, ACPI_ROOT_OBJECT,
|
||||
ACPI_UINT32_MAX,
|
||||
intel_menlow_register_sensor, NULL, NULL);
|
||||
if (ACPI_FAILURE(status))
|
||||
return -ENODEV;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void __exit intel_menlow_module_exit(void)
|
||||
{
|
||||
acpi_bus_unregister_driver(&intel_menlow_memory_driver);
|
||||
intel_menlow_unregister_sensor();
|
||||
}
|
||||
|
||||
module_init(intel_menlow_module_init);
|
||||
module_exit(intel_menlow_module_exit);
|
||||
Loading…
Reference in New Issue
Block a user