INTEL MENLOW THERMAL DRIVER
M: Sujith Thomas <sujith.thomas@intel.com>
-L: platform-driver-x86@vger.kernel.org
+L: linux-pm@vger.kernel.org
S: Supported
W: https://01.org/linux-acpi
-F: drivers/platform/x86/intel_menlow.c
+F: drivers/thermal/intel/intel_menlow.c
INTEL P-Unit IPC DRIVER
M: Zha Qipeng <qipeng.zha@intel.com>
To compile this driver as a module, choose M here: the module will
be called intel_int0002_vgpio.
-config INTEL_MENLOW
- tristate "Thermal Management driver for Intel menlow platform"
- depends on ACPI_THERMAL
- select THERMAL
- help
- ACPI thermal management enhancement driver on
- Intel Menlow platform.
-
- If unsure, say N.
-
config INTEL_OAKTRAIL
tristate "Intel Oaktrail Platform Extras"
depends on ACPI
obj-$(CONFIG_INTEL_ATOMISP2_PM) += intel_atomisp2_pm.o
obj-$(CONFIG_INTEL_HID_EVENT) += intel-hid.o
obj-$(CONFIG_INTEL_INT0002_VGPIO) += intel_int0002_vgpio.o
-obj-$(CONFIG_INTEL_MENLOW) += intel_menlow.o
obj-$(CONFIG_INTEL_OAKTRAIL) += intel_oaktrail.o
obj-$(CONFIG_INTEL_VBTN) += intel-vbtn.o
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0
-/*
- * 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 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.
- */
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/acpi.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/pci.h>
-#include <linux/pm.h>
-#include <linux/slab.h>
-#include <linux/thermal.h>
-#include <linux/types.h>
-#include <linux/units.h>
-
-MODULE_AUTHOR("Thomas Sujith");
-MODULE_AUTHOR("Zhang Rui");
-MODULE_DESCRIPTION("Intel Menlow platform specific driver");
-MODULE_LICENSE("GPL v2");
-
-/*
- * 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 void intel_menlow_unregister_sensor(void);
-
-/*
- * GTHS returning 'n' would mean that [0,n-1] states are supported
- * In that case max_cstate would be n-1
- * GTHS returning '0' would mean that no bandwidth control states are supported
- */
-static int memory_get_max_bandwidth(struct thermal_cooling_device *cdev,
- unsigned long *max_state)
-{
- struct acpi_device *device = cdev->devdata;
- acpi_handle handle = device->handle;
- unsigned long 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;
-
- if (!value)
- return -EINVAL;
-
- *max_state = value - 1;
- return 0;
-}
-
-static int memory_get_cur_bandwidth(struct thermal_cooling_device *cdev,
- unsigned long *value)
-{
- struct acpi_device *device = cdev->devdata;
- acpi_handle handle = device->handle;
- unsigned long long result;
- 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, &result);
- if (ACPI_FAILURE(status))
- return -EFAULT;
-
- *value = result;
- return 0;
-}
-
-static int memory_set_cur_bandwidth(struct thermal_cooling_device *cdev,
- unsigned long 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;
- unsigned long long temp;
- unsigned long max_state;
-
- if (memory_get_max_bandwidth(cdev, &max_state))
- return -EFAULT;
-
- if (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,
- &temp);
-
- pr_info("Bandwidth value was %ld: status is %d\n", state, status);
- if (ACPI_FAILURE(status))
- return -EFAULT;
-
- return 0;
-}
-
-static const 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;
- struct thermal_cooling_device *cdev;
-
- if (!device)
- return -EINVAL;
-
- if (!acpi_has_method(device->handle, MEMORY_GET_BANDWIDTH))
- goto end;
-
- if (!acpi_has_method(device->handle, MEMORY_SET_BANDWIDTH))
- goto end;
-
- cdev = thermal_cooling_device_register("Memory controller", device,
- &memory_cooling_ops);
- if (IS_ERR(cdev)) {
- result = PTR_ERR(cdev);
- goto end;
- }
-
- device->driver_data = cdev;
- 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)
-{
- struct thermal_cooling_device *cdev;
-
- if (!device)
- return -EINVAL;
-
- cdev = acpi_driver_data(device);
- if (!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;
-}
-
-static const 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,
- unsigned long long *value)
-{
- acpi_status status;
-
- if ((index != 0 && index != 1) || !value)
- return -EINVAL;
-
- status = acpi_evaluate_integer(handle, index ? GET_AUX1 : GET_AUX0,
- NULL, 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
- };
- unsigned long long temp;
-
- if (index != 0 && index != 1)
- return -EINVAL;
-
- status = acpi_evaluate_integer(handle, index ? GET_AUX0 : GET_AUX1,
- NULL, &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, &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 aux_show(struct device *dev, struct device_attribute *dev_attr,
- char *buf, int idx)
-{
- struct intel_menlow_attribute *attr = to_intel_menlow_attr(dev_attr);
- unsigned long long value;
- int result;
-
- result = sensor_get_auxtrip(attr->handle, idx, &value);
- if (result)
- return result;
-
- return sprintf(buf, "%lu", deci_kelvin_to_celsius(value));
-}
-
-static ssize_t aux0_show(struct device *dev,
- struct device_attribute *dev_attr, char *buf)
-{
- return aux_show(dev, dev_attr, buf, 0);
-}
-
-static ssize_t aux1_show(struct device *dev,
- struct device_attribute *dev_attr, char *buf)
-{
- return aux_show(dev, dev_attr, buf, 1);
-}
-
-static ssize_t aux_store(struct device *dev, struct device_attribute *dev_attr,
- const char *buf, size_t count, int idx)
-{
- 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, idx,
- celsius_to_deci_kelvin(value));
- return result ? result : count;
-}
-
-static ssize_t aux0_store(struct device *dev,
- struct device_attribute *dev_attr,
- const char *buf, size_t count)
-{
- return aux_store(dev, dev_attr, buf, count, 0);
-}
-
-static ssize_t aux1_store(struct device *dev,
- struct device_attribute *dev_attr,
- const char *buf, size_t count)
-{
- return aux_store(dev, dev_attr, buf, count, 1);
-}
-
-/* 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 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, umode_t 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;
-
- sysfs_attr_init(&attr->attr.attr); /* That is consistent naming :D */
- 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) {
- kfree(attr);
- 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))
- return (status == AE_NOT_FOUND) ? AE_OK : status;
-
- status = acpi_get_handle(handle, SET_AUX0, &dummy);
- if (ACPI_FAILURE(status))
- return (status == AE_NOT_FOUND) ? AE_OK : status;
-
- 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 aux1_not_found;
-
- status = acpi_get_handle(handle, SET_AUX1, &dummy);
- if (ACPI_FAILURE(status))
- goto aux1_not_found;
-
- result = intel_menlow_add_one_attribute("aux1", 0644,
- aux1_show, aux1_store,
- &thermal->device, handle);
- if (result) {
- intel_menlow_unregister_sensor();
- 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) {
- intel_menlow_unregister_sensor();
- return AE_ERROR;
- }
-
- return AE_OK;
-
- aux1_not_found:
- if (status == AE_NOT_FOUND)
- return AE_OK;
-
- intel_menlow_unregister_sensor();
- 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 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, NULL);
- if (ACPI_FAILURE(status)) {
- acpi_bus_unregister_driver(&intel_menlow_memory_driver);
- 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);
Note that, on different platforms, the behavior might be different
on how fast the setting takes effect, and how much the CPU frequency
is reduced.
+
+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.
obj-$(CONFIG_INTEL_PCH_THERMAL) += intel_pch_thermal.o
obj-$(CONFIG_INTEL_TCC_COOLING) += intel_tcc_cooling.o
obj-$(CONFIG_X86_THERMAL_VECTOR) += therm_throt.o
+obj-$(CONFIG_INTEL_MENLOW) += intel_menlow.o
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * 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 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.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/acpi.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/pm.h>
+#include <linux/slab.h>
+#include <linux/thermal.h>
+#include <linux/types.h>
+#include <linux/units.h>
+
+MODULE_AUTHOR("Thomas Sujith");
+MODULE_AUTHOR("Zhang Rui");
+MODULE_DESCRIPTION("Intel Menlow platform specific driver");
+MODULE_LICENSE("GPL v2");
+
+/*
+ * 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 void intel_menlow_unregister_sensor(void);
+
+/*
+ * GTHS returning 'n' would mean that [0,n-1] states are supported
+ * In that case max_cstate would be n-1
+ * GTHS returning '0' would mean that no bandwidth control states are supported
+ */
+static int memory_get_max_bandwidth(struct thermal_cooling_device *cdev,
+ unsigned long *max_state)
+{
+ struct acpi_device *device = cdev->devdata;
+ acpi_handle handle = device->handle;
+ unsigned long 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;
+
+ if (!value)
+ return -EINVAL;
+
+ *max_state = value - 1;
+ return 0;
+}
+
+static int memory_get_cur_bandwidth(struct thermal_cooling_device *cdev,
+ unsigned long *value)
+{
+ struct acpi_device *device = cdev->devdata;
+ acpi_handle handle = device->handle;
+ unsigned long long result;
+ 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, &result);
+ if (ACPI_FAILURE(status))
+ return -EFAULT;
+
+ *value = result;
+ return 0;
+}
+
+static int memory_set_cur_bandwidth(struct thermal_cooling_device *cdev,
+ unsigned long 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;
+ unsigned long long temp;
+ unsigned long max_state;
+
+ if (memory_get_max_bandwidth(cdev, &max_state))
+ return -EFAULT;
+
+ if (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,
+ &temp);
+
+ pr_info("Bandwidth value was %ld: status is %d\n", state, status);
+ if (ACPI_FAILURE(status))
+ return -EFAULT;
+
+ return 0;
+}
+
+static const 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;
+ struct thermal_cooling_device *cdev;
+
+ if (!device)
+ return -EINVAL;
+
+ if (!acpi_has_method(device->handle, MEMORY_GET_BANDWIDTH))
+ goto end;
+
+ if (!acpi_has_method(device->handle, MEMORY_SET_BANDWIDTH))
+ goto end;
+
+ cdev = thermal_cooling_device_register("Memory controller", device,
+ &memory_cooling_ops);
+ if (IS_ERR(cdev)) {
+ result = PTR_ERR(cdev);
+ goto end;
+ }
+
+ device->driver_data = cdev;
+ 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)
+{
+ struct thermal_cooling_device *cdev;
+
+ if (!device)
+ return -EINVAL;
+
+ cdev = acpi_driver_data(device);
+ if (!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;
+}
+
+static const 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,
+ unsigned long long *value)
+{
+ acpi_status status;
+
+ if ((index != 0 && index != 1) || !value)
+ return -EINVAL;
+
+ status = acpi_evaluate_integer(handle, index ? GET_AUX1 : GET_AUX0,
+ NULL, 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
+ };
+ unsigned long long temp;
+
+ if (index != 0 && index != 1)
+ return -EINVAL;
+
+ status = acpi_evaluate_integer(handle, index ? GET_AUX0 : GET_AUX1,
+ NULL, &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, &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 aux_show(struct device *dev, struct device_attribute *dev_attr,
+ char *buf, int idx)
+{
+ struct intel_menlow_attribute *attr = to_intel_menlow_attr(dev_attr);
+ unsigned long long value;
+ int result;
+
+ result = sensor_get_auxtrip(attr->handle, idx, &value);
+ if (result)
+ return result;
+
+ return sprintf(buf, "%lu", deci_kelvin_to_celsius(value));
+}
+
+static ssize_t aux0_show(struct device *dev,
+ struct device_attribute *dev_attr, char *buf)
+{
+ return aux_show(dev, dev_attr, buf, 0);
+}
+
+static ssize_t aux1_show(struct device *dev,
+ struct device_attribute *dev_attr, char *buf)
+{
+ return aux_show(dev, dev_attr, buf, 1);
+}
+
+static ssize_t aux_store(struct device *dev, struct device_attribute *dev_attr,
+ const char *buf, size_t count, int idx)
+{
+ 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, idx,
+ celsius_to_deci_kelvin(value));
+ return result ? result : count;
+}
+
+static ssize_t aux0_store(struct device *dev,
+ struct device_attribute *dev_attr,
+ const char *buf, size_t count)
+{
+ return aux_store(dev, dev_attr, buf, count, 0);
+}
+
+static ssize_t aux1_store(struct device *dev,
+ struct device_attribute *dev_attr,
+ const char *buf, size_t count)
+{
+ return aux_store(dev, dev_attr, buf, count, 1);
+}
+
+/* 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 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, umode_t 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;
+
+ sysfs_attr_init(&attr->attr.attr); /* That is consistent naming :D */
+ 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) {
+ kfree(attr);
+ 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))
+ return (status == AE_NOT_FOUND) ? AE_OK : status;
+
+ status = acpi_get_handle(handle, SET_AUX0, &dummy);
+ if (ACPI_FAILURE(status))
+ return (status == AE_NOT_FOUND) ? AE_OK : status;
+
+ 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 aux1_not_found;
+
+ status = acpi_get_handle(handle, SET_AUX1, &dummy);
+ if (ACPI_FAILURE(status))
+ goto aux1_not_found;
+
+ result = intel_menlow_add_one_attribute("aux1", 0644,
+ aux1_show, aux1_store,
+ &thermal->device, handle);
+ if (result) {
+ intel_menlow_unregister_sensor();
+ 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) {
+ intel_menlow_unregister_sensor();
+ return AE_ERROR;
+ }
+
+ return AE_OK;
+
+ aux1_not_found:
+ if (status == AE_NOT_FOUND)
+ return AE_OK;
+
+ intel_menlow_unregister_sensor();
+ 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 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, NULL);
+ if (ACPI_FAILURE(status)) {
+ acpi_bus_unregister_driver(&intel_menlow_memory_driver);
+ 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);
projects / linux.git / commitdiff