diff options
Diffstat (limited to 'drivers/misc/intel_menlow.c')
| -rw-r--r-- | drivers/misc/intel_menlow.c | 536 |
1 files changed, 0 insertions, 536 deletions
diff --git a/drivers/misc/intel_menlow.c b/drivers/misc/intel_menlow.c deleted file mode 100644 index 27b7662955b..00000000000 --- a/drivers/misc/intel_menlow.c +++ /dev/null @@ -1,536 +0,0 @@ -/* - * 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 - -/* - * 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_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 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_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 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, "%llu\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; - unsigned long long temp; - unsigned long max_state; - - if (memory_get_int_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); - - 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); - 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, 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; -} - -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 aux0_show(struct device *dev, - struct device_attribute *dev_attr, char *buf) -{ - struct intel_menlow_attribute *attr = to_intel_menlow_attr(dev_attr); - unsigned long long 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); - unsigned long long 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 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 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); |