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
3 changed files with 536 additions and 0 deletions
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@ -232,4 +232,13 @@ config ATMEL_SSC
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If unsure, say N.
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config INTEL_MENLOW
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tristate "Thermal Management driver for Intel menlow platform"
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depends on ACPI_THERMAL
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---help---
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ACPI thermal management enhancement driver on
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Intel Menlow platform.
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If unsure, say N.
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endif # MISC_DEVICES
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@ -17,3 +17,4 @@ obj-$(CONFIG_SONY_LAPTOP) += sony-laptop.o
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obj-$(CONFIG_THINKPAD_ACPI) += thinkpad_acpi.o
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obj-$(CONFIG_FUJITSU_LAPTOP) += fujitsu-laptop.o
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obj-$(CONFIG_EEPROM_93CX6) += eeprom_93cx6.o
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obj-$(CONFIG_INTEL_MENLOW) += intel_menlow.o
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526
drivers/misc/intel_menlow.c
Normal file
526
drivers/misc/intel_menlow.c
Normal file
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@ -0,0 +1,526 @@
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/*
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* intel_menlow.c - Intel menlow Driver for thermal management extension
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*
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* Copyright (C) 2008 Intel Corp
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* Copyright (C) 2008 Sujith Thomas <sujith.thomas@intel.com>
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* Copyright (C) 2008 Zhang Rui <rui.zhang@intel.com>
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*
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* This driver creates the sys I/F for programming the sensors.
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* It also implements the driver for intel menlow memory controller (hardware
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* id is INT0002) which makes use of the platform specific ACPI methods
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* to get/set bandwidth.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/types.h>
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#include <linux/pci.h>
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#include <linux/pm.h>
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#include <linux/thermal.h>
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#include <acpi/acpi_bus.h>
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#include <acpi/acpi_drivers.h>
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MODULE_AUTHOR("Thomas Sujith");
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MODULE_AUTHOR("Zhang Rui");
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MODULE_DESCRIPTION("Intel Menlow platform specific driver");
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MODULE_LICENSE("GPL");
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/*
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* Memory controller device control
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*/
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#define MEMORY_GET_BANDWIDTH "GTHS"
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#define MEMORY_SET_BANDWIDTH "STHS"
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#define MEMORY_ARG_CUR_BANDWIDTH 1
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#define MEMORY_ARG_MAX_BANDWIDTH 0
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static int memory_get_int_max_bandwidth(struct thermal_cooling_device *cdev,
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unsigned long *max_state)
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{
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struct acpi_device *device = cdev->devdata;
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acpi_handle handle = device->handle;
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unsigned long value;
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struct acpi_object_list arg_list;
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union acpi_object arg;
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acpi_status status = AE_OK;
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arg_list.count = 1;
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arg_list.pointer = &arg;
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arg.type = ACPI_TYPE_INTEGER;
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arg.integer.value = MEMORY_ARG_MAX_BANDWIDTH;
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status = acpi_evaluate_integer(handle, MEMORY_GET_BANDWIDTH,
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&arg_list, &value);
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if (ACPI_FAILURE(status))
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return -EFAULT;
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*max_state = value - 1;
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return 0;
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}
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static int memory_get_max_bandwidth(struct thermal_cooling_device *cdev,
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char *buf)
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{
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unsigned long value;
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if (memory_get_int_max_bandwidth(cdev, &value))
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return -EINVAL;
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return sprintf(buf, "%ld\n", value);
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}
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static int memory_get_cur_bandwidth(struct thermal_cooling_device *cdev,
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char *buf)
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{
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struct acpi_device *device = cdev->devdata;
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acpi_handle handle = device->handle;
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unsigned long value;
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struct acpi_object_list arg_list;
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union acpi_object arg;
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acpi_status status = AE_OK;
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arg_list.count = 1;
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arg_list.pointer = &arg;
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arg.type = ACPI_TYPE_INTEGER;
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arg.integer.value = MEMORY_ARG_CUR_BANDWIDTH;
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status = acpi_evaluate_integer(handle, MEMORY_GET_BANDWIDTH,
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&arg_list, &value);
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if (ACPI_FAILURE(status))
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return -EFAULT;
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return sprintf(buf, "%ld\n", value);
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}
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static int memory_set_cur_bandwidth(struct thermal_cooling_device *cdev,
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unsigned int state)
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{
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struct acpi_device *device = cdev->devdata;
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acpi_handle handle = device->handle;
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struct acpi_object_list arg_list;
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union acpi_object arg;
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acpi_status status;
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int temp;
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unsigned long max_state;
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if (memory_get_int_max_bandwidth(cdev, &max_state))
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return -EFAULT;
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if (max_state < 0 || state > max_state)
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return -EINVAL;
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arg_list.count = 1;
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arg_list.pointer = &arg;
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arg.type = ACPI_TYPE_INTEGER;
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arg.integer.value = state;
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status =
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acpi_evaluate_integer(handle, MEMORY_SET_BANDWIDTH, &arg_list,
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(unsigned long *)&temp);
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printk(KERN_INFO
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"Bandwidth value was %d: status is %d\n", state, status);
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if (ACPI_FAILURE(status))
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return -EFAULT;
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return 0;
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}
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static struct thermal_cooling_device_ops memory_cooling_ops = {
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.get_max_state = memory_get_max_bandwidth,
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.get_cur_state = memory_get_cur_bandwidth,
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.set_cur_state = memory_set_cur_bandwidth,
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};
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/*
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* Memory Device Management
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*/
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static int intel_menlow_memory_add(struct acpi_device *device)
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{
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int result = -ENODEV;
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acpi_status status = AE_OK;
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acpi_handle dummy;
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struct thermal_cooling_device *cdev;
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if (!device)
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return -EINVAL;
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status = acpi_get_handle(device->handle, MEMORY_GET_BANDWIDTH, &dummy);
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if (ACPI_FAILURE(status))
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goto end;
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status = acpi_get_handle(device->handle, MEMORY_SET_BANDWIDTH, &dummy);
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if (ACPI_FAILURE(status))
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goto end;
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cdev = thermal_cooling_device_register("Memory controller", device,
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&memory_cooling_ops);
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acpi_driver_data(device) = cdev;
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if (!cdev)
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result = -ENODEV;
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else {
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result = sysfs_create_link(&device->dev.kobj,
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&cdev->device.kobj, "thermal_cooling");
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if (result)
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goto unregister;
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result = sysfs_create_link(&cdev->device.kobj,
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&device->dev.kobj, "device");
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if (result) {
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sysfs_remove_link(&device->dev.kobj, "thermal_cooling");
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goto unregister;
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}
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}
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end:
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return result;
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unregister:
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thermal_cooling_device_unregister(cdev);
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return result;
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}
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static int intel_menlow_memory_remove(struct acpi_device *device, int type)
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{
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struct thermal_cooling_device *cdev = acpi_driver_data(device);
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if (!device || !cdev)
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return -EINVAL;
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sysfs_remove_link(&device->dev.kobj, "thermal_cooling");
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sysfs_remove_link(&cdev->device.kobj, "device");
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thermal_cooling_device_unregister(cdev);
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return 0;
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}
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const static struct acpi_device_id intel_menlow_memory_ids[] = {
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{"INT0002", 0},
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{"", 0},
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};
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static struct acpi_driver intel_menlow_memory_driver = {
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.name = "intel_menlow_thermal_control",
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.ids = intel_menlow_memory_ids,
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.ops = {
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.add = intel_menlow_memory_add,
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.remove = intel_menlow_memory_remove,
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},
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};
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/*
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* Sensor control on menlow platform
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*/
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#define THERMAL_AUX0 0
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#define THERMAL_AUX1 1
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#define GET_AUX0 "GAX0"
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#define GET_AUX1 "GAX1"
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#define SET_AUX0 "SAX0"
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#define SET_AUX1 "SAX1"
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struct intel_menlow_attribute {
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struct device_attribute attr;
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struct device *device;
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acpi_handle handle;
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struct list_head node;
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};
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static LIST_HEAD(intel_menlow_attr_list);
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static DEFINE_MUTEX(intel_menlow_attr_lock);
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/*
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* sensor_get_auxtrip - get the current auxtrip value from sensor
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* @name: Thermalzone name
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* @auxtype : AUX0/AUX1
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* @buf: syfs buffer
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*/
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static int sensor_get_auxtrip(acpi_handle handle, int index, int *value)
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{
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acpi_status status;
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if ((index != 0 && index != 1) || !value)
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return -EINVAL;
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status = acpi_evaluate_integer(handle, index ? GET_AUX1 : GET_AUX0,
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NULL, (unsigned long *)value);
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if (ACPI_FAILURE(status))
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return -EIO;
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return 0;
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}
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/*
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* sensor_set_auxtrip - set the new auxtrip value to sensor
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* @name: Thermalzone name
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* @auxtype : AUX0/AUX1
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* @buf: syfs buffer
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*/
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static int sensor_set_auxtrip(acpi_handle handle, int index, int value)
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{
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acpi_status status;
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union acpi_object arg = {
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ACPI_TYPE_INTEGER
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};
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struct acpi_object_list args = {
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1, &arg
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};
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int temp;
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if (index != 0 && index != 1)
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return -EINVAL;
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status = acpi_evaluate_integer(handle, index ? GET_AUX0 : GET_AUX1,
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NULL, (unsigned long *)&temp);
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if (ACPI_FAILURE(status))
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return -EIO;
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if ((index && value < temp) || (!index && value > temp))
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return -EINVAL;
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arg.integer.value = value;
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status = acpi_evaluate_integer(handle, index ? SET_AUX1 : SET_AUX0,
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&args, (unsigned long *)&temp);
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if (ACPI_FAILURE(status))
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return -EIO;
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/* do we need to check the return value of SAX0/SAX1 ? */
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return 0;
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}
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#define to_intel_menlow_attr(_attr) \
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container_of(_attr, struct intel_menlow_attribute, attr)
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static ssize_t aux0_show(struct device *dev,
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struct device_attribute *dev_attr, char *buf)
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{
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struct intel_menlow_attribute *attr = to_intel_menlow_attr(dev_attr);
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int value;
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int result;
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result = sensor_get_auxtrip(attr->handle, 0, &value);
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return result ? result : sprintf(buf, "%lu", KELVIN_TO_CELSIUS(value));
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}
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static ssize_t aux1_show(struct device *dev,
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struct device_attribute *dev_attr, char *buf)
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{
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struct intel_menlow_attribute *attr = to_intel_menlow_attr(dev_attr);
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int value;
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int result;
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result = sensor_get_auxtrip(attr->handle, 1, &value);
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return result ? result : sprintf(buf, "%lu", KELVIN_TO_CELSIUS(value));
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}
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static ssize_t aux0_store(struct device *dev,
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struct device_attribute *dev_attr,
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const char *buf, size_t count)
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{
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struct intel_menlow_attribute *attr = to_intel_menlow_attr(dev_attr);
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int value;
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int result;
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/*Sanity check; should be a positive integer */
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if (!sscanf(buf, "%d", &value))
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return -EINVAL;
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if (value < 0)
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return -EINVAL;
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result = sensor_set_auxtrip(attr->handle, 0, CELSIUS_TO_KELVIN(value));
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return result ? result : count;
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}
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static ssize_t aux1_store(struct device *dev,
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struct device_attribute *dev_attr,
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const char *buf, size_t count)
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{
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struct intel_menlow_attribute *attr = to_intel_menlow_attr(dev_attr);
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int value;
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int result;
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/*Sanity check; should be a positive integer */
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if (!sscanf(buf, "%d", &value))
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return -EINVAL;
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if (value < 0)
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return -EINVAL;
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result = sensor_set_auxtrip(attr->handle, 1, CELSIUS_TO_KELVIN(value));
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return result ? result : count;
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}
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/* BIOS can enable/disable the thermal user application in dabney platform */
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#define BIOS_ENABLED "\\_TZ.GSTS"
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static ssize_t bios_enabled_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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acpi_status status;
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unsigned long bios_enabled;
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status = acpi_evaluate_integer(NULL, BIOS_ENABLED, NULL, &bios_enabled);
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if (ACPI_FAILURE(status))
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return -ENODEV;
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return sprintf(buf, "%s\n", bios_enabled ? "enabled" : "disabled");
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}
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static int intel_menlow_add_one_attribute(char *name, int mode, void *show,
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void *store, struct device *dev,
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acpi_handle handle)
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{
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struct intel_menlow_attribute *attr;
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int result;
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attr = kzalloc(sizeof(struct intel_menlow_attribute), GFP_KERNEL);
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if (!attr)
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return -ENOMEM;
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attr->attr.attr.name = name;
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attr->attr.attr.mode = mode;
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attr->attr.show = show;
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attr->attr.store = store;
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attr->device = dev;
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attr->handle = handle;
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result = device_create_file(dev, &attr->attr);
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if (result)
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return result;
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mutex_lock(&intel_menlow_attr_lock);
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list_add_tail(&attr->node, &intel_menlow_attr_list);
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mutex_unlock(&intel_menlow_attr_lock);
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return 0;
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}
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static acpi_status intel_menlow_register_sensor(acpi_handle handle, u32 lvl,
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void *context, void **rv)
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{
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acpi_status status;
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acpi_handle dummy;
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struct thermal_zone_device *thermal;
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int result;
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result = acpi_bus_get_private_data(handle, (void **)&thermal);
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if (result)
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return 0;
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/* _TZ must have the AUX0/1 methods */
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status = acpi_get_handle(handle, GET_AUX0, &dummy);
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if (ACPI_FAILURE(status))
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goto not_found;
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status = acpi_get_handle(handle, SET_AUX0, &dummy);
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if (ACPI_FAILURE(status))
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goto not_found;
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result = intel_menlow_add_one_attribute("aux0", 0644,
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aux0_show, aux0_store,
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&thermal->device, handle);
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if (result)
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return AE_ERROR;
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status = acpi_get_handle(handle, GET_AUX1, &dummy);
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if (ACPI_FAILURE(status))
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goto not_found;
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status = acpi_get_handle(handle, SET_AUX1, &dummy);
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if (ACPI_FAILURE(status))
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goto not_found;
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result = intel_menlow_add_one_attribute("aux1", 0644,
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aux1_show, aux1_store,
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&thermal->device, handle);
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if (result)
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return AE_ERROR;
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/*
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* create the "dabney_enabled" attribute which means the user app
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* should be loaded or not
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*/
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result = intel_menlow_add_one_attribute("bios_enabled", 0444,
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bios_enabled_show, NULL,
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&thermal->device, handle);
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if (result)
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return AE_ERROR;
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||||
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 a new issue