2005-04-16 16:20:36 -06:00
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/*
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* acpi_fan.c - ACPI Fan Driver ($Revision: 29 $)
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*
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* Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
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* Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
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*
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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; either version 2 of the License, or (at
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* your option) any later version.
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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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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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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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2014-08-28 07:47:19 -06:00
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#include <linux/uaccess.h>
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2008-01-17 00:51:24 -07:00
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#include <linux/thermal.h>
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2013-12-02 17:49:16 -07:00
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#include <linux/acpi.h>
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2013-11-19 01:59:20 -07:00
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#include <linux/platform_device.h>
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2014-04-01 01:50:27 -06:00
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#include <linux/sort.h>
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2005-04-16 16:20:36 -06:00
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2007-02-12 20:42:12 -07:00
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MODULE_AUTHOR("Paul Diefenbaugh");
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2007-02-12 21:50:02 -07:00
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MODULE_DESCRIPTION("ACPI Fan Driver");
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2005-04-16 16:20:36 -06:00
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MODULE_LICENSE("GPL");
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2013-11-19 01:59:20 -07:00
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static int acpi_fan_probe(struct platform_device *pdev);
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static int acpi_fan_remove(struct platform_device *pdev);
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2005-04-16 16:20:36 -06:00
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2007-07-23 06:44:41 -06:00
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static const struct acpi_device_id fan_device_ids[] = {
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{"PNP0C0B", 0},
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2014-04-01 01:54:05 -06:00
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{"INT3404", 0},
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2007-07-23 06:44:41 -06:00
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{"", 0},
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};
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MODULE_DEVICE_TABLE(acpi, fan_device_ids);
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2012-08-09 15:00:02 -06:00
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#ifdef CONFIG_PM_SLEEP
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2012-06-27 15:26:07 -06:00
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static int acpi_fan_suspend(struct device *dev);
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static int acpi_fan_resume(struct device *dev);
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2016-02-10 16:23:27 -07:00
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static const struct dev_pm_ops acpi_fan_pm = {
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2014-02-18 21:16:48 -07:00
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.resume = acpi_fan_resume,
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.freeze = acpi_fan_suspend,
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.thaw = acpi_fan_resume,
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.restore = acpi_fan_resume,
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};
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#define FAN_PM_OPS_PTR (&acpi_fan_pm)
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2014-02-12 20:19:08 -07:00
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#else
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2014-02-18 21:16:48 -07:00
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#define FAN_PM_OPS_PTR NULL
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2012-08-09 15:00:02 -06:00
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#endif
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2012-06-27 15:26:07 -06:00
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2014-04-01 01:50:27 -06:00
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struct acpi_fan_fps {
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u64 control;
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u64 trip_point;
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u64 speed;
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u64 noise_level;
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u64 power;
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};
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struct acpi_fan_fif {
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u64 revision;
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u64 fine_grain_ctrl;
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u64 step_size;
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u64 low_speed_notification;
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};
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struct acpi_fan {
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bool acpi4;
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struct acpi_fan_fif fif;
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struct acpi_fan_fps *fps;
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int fps_count;
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struct thermal_cooling_device *cdev;
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};
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2013-11-19 01:59:20 -07:00
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static struct platform_driver acpi_fan_driver = {
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.probe = acpi_fan_probe,
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.remove = acpi_fan_remove,
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.driver = {
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.name = "acpi-fan",
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.acpi_match_table = fan_device_ids,
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.pm = FAN_PM_OPS_PTR,
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},
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2005-04-16 16:20:36 -06:00
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};
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2008-01-17 00:51:24 -07:00
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/* thermal cooling device callbacks */
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2008-11-27 10:48:13 -07:00
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static int fan_get_max_state(struct thermal_cooling_device *cdev, unsigned long
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*state)
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2008-01-17 00:51:24 -07:00
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{
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2014-04-01 01:50:27 -06:00
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struct acpi_device *device = cdev->devdata;
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struct acpi_fan *fan = acpi_driver_data(device);
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if (fan->acpi4)
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*state = fan->fps_count - 1;
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else
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*state = 1;
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2008-11-27 10:48:13 -07:00
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return 0;
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2008-01-17 00:51:24 -07:00
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}
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2014-04-01 01:50:27 -06:00
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static int fan_get_state_acpi4(struct acpi_device *device, unsigned long *state)
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{
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struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
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struct acpi_fan *fan = acpi_driver_data(device);
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union acpi_object *obj;
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acpi_status status;
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int control, i;
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status = acpi_evaluate_object(device->handle, "_FST", NULL, &buffer);
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if (ACPI_FAILURE(status)) {
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dev_err(&device->dev, "Get fan state failed\n");
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return status;
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}
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obj = buffer.pointer;
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if (!obj || obj->type != ACPI_TYPE_PACKAGE ||
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obj->package.count != 3 ||
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obj->package.elements[1].type != ACPI_TYPE_INTEGER) {
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dev_err(&device->dev, "Invalid _FST data\n");
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status = -EINVAL;
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goto err;
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}
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control = obj->package.elements[1].integer.value;
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for (i = 0; i < fan->fps_count; i++) {
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if (control == fan->fps[i].control)
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break;
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}
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if (i == fan->fps_count) {
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dev_dbg(&device->dev, "Invalid control value returned\n");
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status = -EINVAL;
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goto err;
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}
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*state = i;
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err:
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kfree(obj);
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return status;
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}
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static int fan_get_state(struct acpi_device *device, unsigned long *state)
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2008-01-17 00:51:24 -07:00
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{
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int result;
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2013-07-01 08:21:00 -06:00
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int acpi_state = ACPI_STATE_D0;
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2008-01-17 00:51:24 -07:00
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2013-11-19 00:43:52 -07:00
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result = acpi_device_update_power(device, &acpi_state);
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2008-01-17 00:51:24 -07:00
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if (result)
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return result;
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2015-05-15 17:55:35 -06:00
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*state = acpi_state == ACPI_STATE_D3_COLD
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|| acpi_state == ACPI_STATE_D3_HOT ?
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0 : (acpi_state == ACPI_STATE_D0 ? 1 : -1);
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2008-11-27 10:48:13 -07:00
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return 0;
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2008-01-17 00:51:24 -07:00
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}
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2014-04-01 01:50:27 -06:00
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static int fan_get_cur_state(struct thermal_cooling_device *cdev, unsigned long
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*state)
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2008-01-17 00:51:24 -07:00
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{
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struct acpi_device *device = cdev->devdata;
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2014-04-01 01:50:27 -06:00
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struct acpi_fan *fan = acpi_driver_data(device);
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2008-01-17 00:51:24 -07:00
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2014-04-01 01:50:27 -06:00
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if (fan->acpi4)
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return fan_get_state_acpi4(device, state);
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else
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return fan_get_state(device, state);
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}
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2008-01-17 00:51:24 -07:00
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2014-04-01 01:50:27 -06:00
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static int fan_set_state(struct acpi_device *device, unsigned long state)
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{
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if (state != 0 && state != 1)
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2008-01-17 00:51:24 -07:00
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return -EINVAL;
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2014-04-01 01:50:27 -06:00
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return acpi_device_set_power(device,
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state ? ACPI_STATE_D0 : ACPI_STATE_D3_COLD);
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}
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2008-01-17 00:51:24 -07:00
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2014-04-01 01:50:27 -06:00
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static int fan_set_state_acpi4(struct acpi_device *device, unsigned long state)
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{
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struct acpi_fan *fan = acpi_driver_data(device);
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acpi_status status;
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if (state >= fan->fps_count)
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return -EINVAL;
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status = acpi_execute_simple_method(device->handle, "_FSL",
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fan->fps[state].control);
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if (ACPI_FAILURE(status)) {
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dev_dbg(&device->dev, "Failed to set state by _FSL\n");
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return status;
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}
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return 0;
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2008-01-17 00:51:24 -07:00
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}
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2014-04-01 01:50:27 -06:00
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static int
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fan_set_cur_state(struct thermal_cooling_device *cdev, unsigned long state)
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{
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struct acpi_device *device = cdev->devdata;
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struct acpi_fan *fan = acpi_driver_data(device);
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if (fan->acpi4)
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return fan_set_state_acpi4(device, state);
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else
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return fan_set_state(device, state);
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}
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2011-06-25 11:07:52 -06:00
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static const struct thermal_cooling_device_ops fan_cooling_ops = {
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2008-01-17 00:51:24 -07:00
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.get_max_state = fan_get_max_state,
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.get_cur_state = fan_get_cur_state,
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.set_cur_state = fan_set_cur_state,
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};
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2005-04-16 16:20:36 -06:00
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/* --------------------------------------------------------------------------
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2014-08-28 07:47:19 -06:00
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* Driver Interface
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* --------------------------------------------------------------------------
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*/
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2005-04-16 16:20:36 -06:00
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2014-04-01 01:50:27 -06:00
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static bool acpi_fan_is_acpi4(struct acpi_device *device)
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2005-04-16 16:20:36 -06:00
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{
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2014-04-01 01:50:27 -06:00
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return acpi_has_method(device->handle, "_FIF") &&
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acpi_has_method(device->handle, "_FPS") &&
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acpi_has_method(device->handle, "_FSL") &&
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acpi_has_method(device->handle, "_FST");
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}
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2005-04-16 16:20:36 -06:00
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2014-04-01 01:50:27 -06:00
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static int acpi_fan_get_fif(struct acpi_device *device)
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{
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struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
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struct acpi_fan *fan = acpi_driver_data(device);
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struct acpi_buffer format = { sizeof("NNNN"), "NNNN" };
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struct acpi_buffer fif = { sizeof(fan->fif), &fan->fif };
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union acpi_object *obj;
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acpi_status status;
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status = acpi_evaluate_object(device->handle, "_FIF", NULL, &buffer);
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if (ACPI_FAILURE(status))
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return status;
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obj = buffer.pointer;
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if (!obj || obj->type != ACPI_TYPE_PACKAGE) {
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dev_err(&device->dev, "Invalid _FIF data\n");
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status = -EINVAL;
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goto err;
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}
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2005-04-16 16:20:36 -06:00
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2014-04-01 01:50:27 -06:00
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status = acpi_extract_package(obj, &format, &fif);
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if (ACPI_FAILURE(status)) {
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dev_err(&device->dev, "Invalid _FIF element\n");
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status = -EINVAL;
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}
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2005-04-16 16:20:36 -06:00
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2014-04-01 01:50:27 -06:00
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err:
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kfree(obj);
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return status;
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}
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static int acpi_fan_speed_cmp(const void *a, const void *b)
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{
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const struct acpi_fan_fps *fps1 = a;
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const struct acpi_fan_fps *fps2 = b;
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return fps1->speed - fps2->speed;
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}
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static int acpi_fan_get_fps(struct acpi_device *device)
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{
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struct acpi_fan *fan = acpi_driver_data(device);
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struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
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union acpi_object *obj;
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acpi_status status;
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int i;
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status = acpi_evaluate_object(device->handle, "_FPS", NULL, &buffer);
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if (ACPI_FAILURE(status))
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return status;
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obj = buffer.pointer;
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if (!obj || obj->type != ACPI_TYPE_PACKAGE || obj->package.count < 2) {
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dev_err(&device->dev, "Invalid _FPS data\n");
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status = -EINVAL;
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goto err;
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}
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fan->fps_count = obj->package.count - 1; /* minus revision field */
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fan->fps = devm_kzalloc(&device->dev,
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fan->fps_count * sizeof(struct acpi_fan_fps),
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GFP_KERNEL);
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if (!fan->fps) {
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dev_err(&device->dev, "Not enough memory\n");
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status = -ENOMEM;
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goto err;
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}
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for (i = 0; i < fan->fps_count; i++) {
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struct acpi_buffer format = { sizeof("NNNNN"), "NNNNN" };
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struct acpi_buffer fps = { sizeof(fan->fps[i]), &fan->fps[i] };
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status = acpi_extract_package(&obj->package.elements[i + 1],
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&format, &fps);
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if (ACPI_FAILURE(status)) {
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dev_err(&device->dev, "Invalid _FPS element\n");
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break;
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}
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}
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/* sort the state array according to fan speed in increase order */
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sort(fan->fps, fan->fps_count, sizeof(*fan->fps),
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acpi_fan_speed_cmp, NULL);
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err:
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kfree(obj);
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return status;
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}
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|
|
|
|
2013-11-19 01:59:20 -07:00
|
|
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static int acpi_fan_probe(struct platform_device *pdev)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
2005-08-04 22:44:28 -06:00
|
|
|
int result = 0;
|
2008-01-17 00:51:24 -07:00
|
|
|
struct thermal_cooling_device *cdev;
|
2014-04-01 01:50:27 -06:00
|
|
|
struct acpi_fan *fan;
|
2013-11-19 01:59:20 -07:00
|
|
|
struct acpi_device *device = ACPI_COMPANION(&pdev->dev);
|
2014-12-09 17:15:40 -07:00
|
|
|
char *name;
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2014-04-01 01:50:27 -06:00
|
|
|
fan = devm_kzalloc(&pdev->dev, sizeof(*fan), GFP_KERNEL);
|
|
|
|
if (!fan) {
|
|
|
|
dev_err(&device->dev, "No memory for fan\n");
|
|
|
|
return -ENOMEM;
|
|
|
|
}
|
|
|
|
device->driver_data = fan;
|
|
|
|
platform_set_drvdata(pdev, fan);
|
|
|
|
|
|
|
|
if (acpi_fan_is_acpi4(device)) {
|
|
|
|
if (acpi_fan_get_fif(device) || acpi_fan_get_fps(device))
|
|
|
|
goto end;
|
|
|
|
fan->acpi4 = true;
|
|
|
|
} else {
|
|
|
|
result = acpi_device_update_power(device, NULL);
|
|
|
|
if (result) {
|
2016-01-13 15:25:19 -07:00
|
|
|
dev_err(&device->dev, "Failed to set initial power state\n");
|
2014-04-01 01:50:27 -06:00
|
|
|
goto end;
|
|
|
|
}
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
|
2014-12-09 17:15:40 -07:00
|
|
|
if (!strncmp(pdev->name, "PNP0C0B", strlen("PNP0C0B")))
|
|
|
|
name = "Fan";
|
|
|
|
else
|
|
|
|
name = acpi_device_bid(device);
|
|
|
|
|
|
|
|
cdev = thermal_cooling_device_register(name, device,
|
2008-01-17 00:51:24 -07:00
|
|
|
&fan_cooling_ops);
|
2008-02-14 23:01:52 -07:00
|
|
|
if (IS_ERR(cdev)) {
|
|
|
|
result = PTR_ERR(cdev);
|
|
|
|
goto end;
|
|
|
|
}
|
2008-04-10 20:09:24 -06:00
|
|
|
|
2013-11-19 01:59:20 -07:00
|
|
|
dev_dbg(&pdev->dev, "registered as cooling_device%d\n", cdev->id);
|
2008-04-10 20:09:24 -06:00
|
|
|
|
2014-04-01 01:50:27 -06:00
|
|
|
fan->cdev = cdev;
|
2013-11-19 01:59:20 -07:00
|
|
|
result = sysfs_create_link(&pdev->dev.kobj,
|
2008-04-10 20:09:24 -06:00
|
|
|
&cdev->device.kobj,
|
|
|
|
"thermal_cooling");
|
|
|
|
if (result)
|
2014-10-24 12:21:43 -06:00
|
|
|
dev_err(&pdev->dev, "Failed to create sysfs link 'thermal_cooling'\n");
|
2008-04-10 20:09:24 -06:00
|
|
|
|
|
|
|
result = sysfs_create_link(&cdev->device.kobj,
|
2013-11-19 01:59:20 -07:00
|
|
|
&pdev->dev.kobj,
|
2008-04-10 20:09:24 -06:00
|
|
|
"device");
|
|
|
|
if (result)
|
2014-10-24 12:21:43 -06:00
|
|
|
dev_err(&pdev->dev, "Failed to create sysfs link 'device'\n");
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2013-08-30 15:16:05 -06:00
|
|
|
end:
|
2006-06-26 22:41:40 -06:00
|
|
|
return result;
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
|
2013-11-19 01:59:20 -07:00
|
|
|
static int acpi_fan_remove(struct platform_device *pdev)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
2014-04-01 01:50:27 -06:00
|
|
|
struct acpi_fan *fan = platform_get_drvdata(pdev);
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2013-11-19 01:59:20 -07:00
|
|
|
sysfs_remove_link(&pdev->dev.kobj, "thermal_cooling");
|
2014-04-01 01:50:27 -06:00
|
|
|
sysfs_remove_link(&fan->cdev->device.kobj, "device");
|
|
|
|
thermal_cooling_device_unregister(fan->cdev);
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2006-06-26 22:41:40 -06:00
|
|
|
return 0;
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
|
2012-08-09 15:00:02 -06:00
|
|
|
#ifdef CONFIG_PM_SLEEP
|
2012-06-27 15:26:07 -06:00
|
|
|
static int acpi_fan_suspend(struct device *dev)
|
2008-01-23 20:41:20 -07:00
|
|
|
{
|
2014-04-01 01:50:27 -06:00
|
|
|
struct acpi_fan *fan = dev_get_drvdata(dev);
|
|
|
|
if (fan->acpi4)
|
|
|
|
return 0;
|
2008-01-23 20:41:20 -07:00
|
|
|
|
2013-11-19 01:59:20 -07:00
|
|
|
acpi_device_set_power(ACPI_COMPANION(dev), ACPI_STATE_D0);
|
2008-01-23 20:41:20 -07:00
|
|
|
|
|
|
|
return AE_OK;
|
|
|
|
}
|
|
|
|
|
2012-06-27 15:26:07 -06:00
|
|
|
static int acpi_fan_resume(struct device *dev)
|
2008-01-23 20:41:20 -07:00
|
|
|
{
|
2010-11-24 16:11:24 -07:00
|
|
|
int result;
|
2014-04-01 01:50:27 -06:00
|
|
|
struct acpi_fan *fan = dev_get_drvdata(dev);
|
2008-01-23 20:41:20 -07:00
|
|
|
|
2014-04-01 01:50:27 -06:00
|
|
|
if (fan->acpi4)
|
|
|
|
return 0;
|
2008-01-23 20:41:20 -07:00
|
|
|
|
2013-11-19 01:59:20 -07:00
|
|
|
result = acpi_device_update_power(ACPI_COMPANION(dev), NULL);
|
2010-11-24 16:11:24 -07:00
|
|
|
if (result)
|
2014-08-28 07:47:19 -06:00
|
|
|
dev_err(dev, "Error updating fan power state\n");
|
2008-01-23 20:41:20 -07:00
|
|
|
|
|
|
|
return result;
|
|
|
|
}
|
2012-08-09 15:00:02 -06:00
|
|
|
#endif
|
2008-01-23 20:41:20 -07:00
|
|
|
|
2013-11-19 01:59:20 -07:00
|
|
|
module_platform_driver(acpi_fan_driver);
|