Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * acpi_fan.c - ACPI Fan Driver ($Revision: 29 $) |
| 3 | * |
| 4 | * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> |
| 5 | * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> |
| 6 | * |
| 7 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License as published by |
| 11 | * the Free Software Foundation; either version 2 of the License, or (at |
| 12 | * your option) any later version. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, but |
| 15 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 17 | * General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License along |
| 20 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 21 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. |
| 22 | * |
| 23 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 24 | */ |
| 25 | |
| 26 | #include <linux/kernel.h> |
| 27 | #include <linux/module.h> |
| 28 | #include <linux/init.h> |
| 29 | #include <linux/types.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | #include <asm/uaccess.h> |
Zhang Rui | 05a83d9 | 2008-01-17 15:51:24 +0800 | [diff] [blame] | 31 | #include <linux/thermal.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | #include <acpi/acpi_bus.h> |
| 33 | #include <acpi/acpi_drivers.h> |
| 34 | |
Len Brown | a192a95 | 2009-07-28 16:45:54 -0400 | [diff] [blame] | 35 | #define PREFIX "ACPI: " |
| 36 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | #define ACPI_FAN_CLASS "fan" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | #define ACPI_FAN_FILE_STATE "state" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | |
| 40 | #define _COMPONENT ACPI_FAN_COMPONENT |
Len Brown | f52fd66 | 2007-02-12 22:42:12 -0500 | [diff] [blame] | 41 | ACPI_MODULE_NAME("fan"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | |
Len Brown | f52fd66 | 2007-02-12 22:42:12 -0500 | [diff] [blame] | 43 | MODULE_AUTHOR("Paul Diefenbaugh"); |
Len Brown | 7cda93e | 2007-02-12 23:50:02 -0500 | [diff] [blame] | 44 | MODULE_DESCRIPTION("ACPI Fan Driver"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | MODULE_LICENSE("GPL"); |
| 46 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 47 | static int acpi_fan_add(struct acpi_device *device); |
| 48 | static int acpi_fan_remove(struct acpi_device *device, int type); |
Len Brown | ec68373 | 2008-01-23 22:41:20 -0500 | [diff] [blame] | 49 | static int acpi_fan_suspend(struct acpi_device *device, pm_message_t state); |
| 50 | static int acpi_fan_resume(struct acpi_device *device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | |
Thomas Renninger | 1ba90e3 | 2007-07-23 14:44:41 +0200 | [diff] [blame] | 52 | static const struct acpi_device_id fan_device_ids[] = { |
| 53 | {"PNP0C0B", 0}, |
| 54 | {"", 0}, |
| 55 | }; |
| 56 | MODULE_DEVICE_TABLE(acpi, fan_device_ids); |
| 57 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | static struct acpi_driver acpi_fan_driver = { |
Len Brown | c2b6705 | 2007-02-12 23:33:40 -0500 | [diff] [blame] | 59 | .name = "fan", |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 60 | .class = ACPI_FAN_CLASS, |
Thomas Renninger | 1ba90e3 | 2007-07-23 14:44:41 +0200 | [diff] [blame] | 61 | .ids = fan_device_ids, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 62 | .ops = { |
| 63 | .add = acpi_fan_add, |
| 64 | .remove = acpi_fan_remove, |
Len Brown | ec68373 | 2008-01-23 22:41:20 -0500 | [diff] [blame] | 65 | .suspend = acpi_fan_suspend, |
| 66 | .resume = acpi_fan_resume, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 67 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | }; |
| 69 | |
Zhang Rui | 05a83d9 | 2008-01-17 15:51:24 +0800 | [diff] [blame] | 70 | /* thermal cooling device callbacks */ |
Matthew Garrett | 6503e5d | 2008-11-27 17:48:13 +0000 | [diff] [blame] | 71 | static int fan_get_max_state(struct thermal_cooling_device *cdev, unsigned long |
| 72 | *state) |
Zhang Rui | 05a83d9 | 2008-01-17 15:51:24 +0800 | [diff] [blame] | 73 | { |
| 74 | /* ACPI fan device only support two states: ON/OFF */ |
Matthew Garrett | 6503e5d | 2008-11-27 17:48:13 +0000 | [diff] [blame] | 75 | *state = 1; |
| 76 | return 0; |
Zhang Rui | 05a83d9 | 2008-01-17 15:51:24 +0800 | [diff] [blame] | 77 | } |
| 78 | |
Matthew Garrett | 6503e5d | 2008-11-27 17:48:13 +0000 | [diff] [blame] | 79 | static int fan_get_cur_state(struct thermal_cooling_device *cdev, unsigned long |
| 80 | *state) |
Zhang Rui | 05a83d9 | 2008-01-17 15:51:24 +0800 | [diff] [blame] | 81 | { |
| 82 | struct acpi_device *device = cdev->devdata; |
Zhang Rui | 05a83d9 | 2008-01-17 15:51:24 +0800 | [diff] [blame] | 83 | int result; |
Matthew Garrett | 6503e5d | 2008-11-27 17:48:13 +0000 | [diff] [blame] | 84 | int acpi_state; |
Zhang Rui | 05a83d9 | 2008-01-17 15:51:24 +0800 | [diff] [blame] | 85 | |
| 86 | if (!device) |
| 87 | return -EINVAL; |
| 88 | |
Matthew Garrett | 6503e5d | 2008-11-27 17:48:13 +0000 | [diff] [blame] | 89 | result = acpi_bus_get_power(device->handle, &acpi_state); |
Zhang Rui | 05a83d9 | 2008-01-17 15:51:24 +0800 | [diff] [blame] | 90 | if (result) |
| 91 | return result; |
| 92 | |
Matthew Garrett | 6503e5d | 2008-11-27 17:48:13 +0000 | [diff] [blame] | 93 | *state = (acpi_state == ACPI_STATE_D3 ? 0 : |
| 94 | (acpi_state == ACPI_STATE_D0 ? 1 : -1)); |
| 95 | return 0; |
Zhang Rui | 05a83d9 | 2008-01-17 15:51:24 +0800 | [diff] [blame] | 96 | } |
| 97 | |
| 98 | static int |
Matthew Garrett | 6503e5d | 2008-11-27 17:48:13 +0000 | [diff] [blame] | 99 | fan_set_cur_state(struct thermal_cooling_device *cdev, unsigned long state) |
Zhang Rui | 05a83d9 | 2008-01-17 15:51:24 +0800 | [diff] [blame] | 100 | { |
| 101 | struct acpi_device *device = cdev->devdata; |
| 102 | int result; |
| 103 | |
| 104 | if (!device || (state != 0 && state != 1)) |
| 105 | return -EINVAL; |
| 106 | |
| 107 | result = acpi_bus_set_power(device->handle, |
| 108 | state ? ACPI_STATE_D0 : ACPI_STATE_D3); |
| 109 | |
| 110 | return result; |
| 111 | } |
| 112 | |
| 113 | static struct thermal_cooling_device_ops fan_cooling_ops = { |
| 114 | .get_max_state = fan_get_max_state, |
| 115 | .get_cur_state = fan_get_cur_state, |
| 116 | .set_cur_state = fan_set_cur_state, |
| 117 | }; |
| 118 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | /* -------------------------------------------------------------------------- |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | Driver Interface |
| 121 | -------------------------------------------------------------------------- */ |
| 122 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 123 | static int acpi_fan_add(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 125 | int result = 0; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 126 | int state = 0; |
Zhang Rui | 05a83d9 | 2008-01-17 15:51:24 +0800 | [diff] [blame] | 127 | struct thermal_cooling_device *cdev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | |
| 129 | if (!device) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 130 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | |
Pavel Machek | c65ade4 | 2005-08-05 00:37:45 -0400 | [diff] [blame] | 132 | strcpy(acpi_device_name(device), "Fan"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | strcpy(acpi_device_class(device), ACPI_FAN_CLASS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | |
Patrick Mochel | dc8c2b2 | 2006-05-19 16:54:42 -0400 | [diff] [blame] | 135 | result = acpi_bus_get_power(device->handle, &state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | if (result) { |
Len Brown | 6468463 | 2006-06-26 23:41:38 -0400 | [diff] [blame] | 137 | printk(KERN_ERR PREFIX "Reading power state\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | goto end; |
| 139 | } |
| 140 | |
Len Brown | ec68373 | 2008-01-23 22:41:20 -0500 | [diff] [blame] | 141 | device->flags.force_power_state = 1; |
| 142 | acpi_bus_set_power(device->handle, state); |
| 143 | device->flags.force_power_state = 0; |
| 144 | |
Zhang Rui | 05a83d9 | 2008-01-17 15:51:24 +0800 | [diff] [blame] | 145 | cdev = thermal_cooling_device_register("Fan", device, |
| 146 | &fan_cooling_ops); |
Thomas Sujith | 19b3678 | 2008-02-15 01:01:52 -0500 | [diff] [blame] | 147 | if (IS_ERR(cdev)) { |
| 148 | result = PTR_ERR(cdev); |
| 149 | goto end; |
| 150 | } |
Zhang Rui | 05a83d9 | 2008-01-17 15:51:24 +0800 | [diff] [blame] | 151 | |
Mike Travis | 13c4115 | 2009-12-14 13:38:30 -0800 | [diff] [blame] | 152 | dev_dbg(&device->dev, "registered as cooling_device%d\n", cdev->id); |
Thomas Sujith | 19b3678 | 2008-02-15 01:01:52 -0500 | [diff] [blame] | 153 | |
Pavel Machek | db89b4f | 2008-09-22 14:37:34 -0700 | [diff] [blame] | 154 | device->driver_data = cdev; |
Julia Lawall | 9030062 | 2008-04-11 10:09:24 +0800 | [diff] [blame] | 155 | result = sysfs_create_link(&device->dev.kobj, |
| 156 | &cdev->device.kobj, |
| 157 | "thermal_cooling"); |
| 158 | if (result) |
Greg Kroah-Hartman | fc3a882 | 2008-05-02 06:02:41 +0200 | [diff] [blame] | 159 | dev_err(&device->dev, "Failed to create sysfs link " |
| 160 | "'thermal_cooling'\n"); |
Julia Lawall | 9030062 | 2008-04-11 10:09:24 +0800 | [diff] [blame] | 161 | |
| 162 | result = sysfs_create_link(&cdev->device.kobj, |
| 163 | &device->dev.kobj, |
| 164 | "device"); |
| 165 | if (result) |
Greg Kroah-Hartman | fc3a882 | 2008-05-02 06:02:41 +0200 | [diff] [blame] | 166 | dev_err(&device->dev, "Failed to create sysfs link " |
| 167 | "'device'\n"); |
Zhang Rui | 05a83d9 | 2008-01-17 15:51:24 +0800 | [diff] [blame] | 168 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | printk(KERN_INFO PREFIX "%s [%s] (%s)\n", |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 170 | acpi_device_name(device), acpi_device_bid(device), |
| 171 | !device->power.state ? "on" : "off"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 173 | end: |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 174 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | } |
| 176 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 177 | static int acpi_fan_remove(struct acpi_device *device, int type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | { |
Zhang Rui | 05a83d9 | 2008-01-17 15:51:24 +0800 | [diff] [blame] | 179 | struct thermal_cooling_device *cdev = acpi_driver_data(device); |
| 180 | |
| 181 | if (!device || !cdev) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 182 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 183 | |
Zhang Rui | 05a83d9 | 2008-01-17 15:51:24 +0800 | [diff] [blame] | 184 | sysfs_remove_link(&device->dev.kobj, "thermal_cooling"); |
| 185 | sysfs_remove_link(&cdev->device.kobj, "device"); |
| 186 | thermal_cooling_device_unregister(cdev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 188 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | } |
| 190 | |
Len Brown | ec68373 | 2008-01-23 22:41:20 -0500 | [diff] [blame] | 191 | static int acpi_fan_suspend(struct acpi_device *device, pm_message_t state) |
| 192 | { |
| 193 | if (!device) |
| 194 | return -EINVAL; |
| 195 | |
| 196 | acpi_bus_set_power(device->handle, ACPI_STATE_D0); |
| 197 | |
| 198 | return AE_OK; |
| 199 | } |
| 200 | |
| 201 | static int acpi_fan_resume(struct acpi_device *device) |
| 202 | { |
| 203 | int result = 0; |
| 204 | int power_state = 0; |
| 205 | |
| 206 | if (!device) |
| 207 | return -EINVAL; |
| 208 | |
| 209 | result = acpi_bus_get_power(device->handle, &power_state); |
| 210 | if (result) { |
Lin Ming | 55ac9a0 | 2008-09-28 14:51:56 +0800 | [diff] [blame] | 211 | printk(KERN_ERR PREFIX |
| 212 | "Error reading fan power state\n"); |
Len Brown | ec68373 | 2008-01-23 22:41:20 -0500 | [diff] [blame] | 213 | return result; |
| 214 | } |
| 215 | |
| 216 | device->flags.force_power_state = 1; |
| 217 | acpi_bus_set_power(device->handle, power_state); |
| 218 | device->flags.force_power_state = 0; |
| 219 | |
| 220 | return result; |
| 221 | } |
| 222 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 223 | static int __init acpi_fan_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 224 | { |
Pavel Machek | c65ade4 | 2005-08-05 00:37:45 -0400 | [diff] [blame] | 225 | int result = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 227 | result = acpi_bus_register_driver(&acpi_fan_driver); |
Zhang Rui | b2a4498 | 2010-10-08 13:55:03 +0800 | [diff] [blame] | 228 | if (result < 0) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 229 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 230 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 231 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | } |
| 233 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 234 | static void __exit acpi_fan_exit(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 235 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | |
| 237 | acpi_bus_unregister_driver(&acpi_fan_driver); |
| 238 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 239 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | } |
| 241 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 242 | module_init(acpi_fan_init); |
| 243 | module_exit(acpi_fan_exit); |