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> |
| 30 | #include <linux/proc_fs.h> |
| 31 | #include <linux/seq_file.h> |
| 32 | #include <asm/uaccess.h> |
Zhang Rui | 05a83d9 | 2008-01-17 15:51:24 +0800 | [diff] [blame] | 33 | #include <linux/thermal.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | #include <acpi/acpi_bus.h> |
| 35 | #include <acpi/acpi_drivers.h> |
| 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 */ |
| 71 | static int fan_get_max_state(struct thermal_cooling_device *cdev, char *buf) |
| 72 | { |
| 73 | /* ACPI fan device only support two states: ON/OFF */ |
| 74 | return sprintf(buf, "1\n"); |
| 75 | } |
| 76 | |
| 77 | static int fan_get_cur_state(struct thermal_cooling_device *cdev, char *buf) |
| 78 | { |
| 79 | struct acpi_device *device = cdev->devdata; |
| 80 | int state; |
| 81 | int result; |
| 82 | |
| 83 | if (!device) |
| 84 | return -EINVAL; |
| 85 | |
| 86 | result = acpi_bus_get_power(device->handle, &state); |
| 87 | if (result) |
| 88 | return result; |
| 89 | |
| 90 | return sprintf(buf, "%s\n", state == ACPI_STATE_D3 ? "0" : |
| 91 | (state == ACPI_STATE_D0 ? "1" : "unknown")); |
| 92 | } |
| 93 | |
| 94 | static int |
| 95 | fan_set_cur_state(struct thermal_cooling_device *cdev, unsigned int state) |
| 96 | { |
| 97 | struct acpi_device *device = cdev->devdata; |
| 98 | int result; |
| 99 | |
| 100 | if (!device || (state != 0 && state != 1)) |
| 101 | return -EINVAL; |
| 102 | |
| 103 | result = acpi_bus_set_power(device->handle, |
| 104 | state ? ACPI_STATE_D0 : ACPI_STATE_D3); |
| 105 | |
| 106 | return result; |
| 107 | } |
| 108 | |
| 109 | static struct thermal_cooling_device_ops fan_cooling_ops = { |
| 110 | .get_max_state = fan_get_max_state, |
| 111 | .get_cur_state = fan_get_cur_state, |
| 112 | .set_cur_state = fan_set_cur_state, |
| 113 | }; |
| 114 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | /* -------------------------------------------------------------------------- |
| 116 | FS Interface (/proc) |
| 117 | -------------------------------------------------------------------------- */ |
Zhang Rui | 05a83d9 | 2008-01-17 15:51:24 +0800 | [diff] [blame] | 118 | #ifdef CONFIG_ACPI_PROCFS |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 120 | static struct proc_dir_entry *acpi_fan_dir; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 122 | static int acpi_fan_read_state(struct seq_file *seq, void *offset) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | { |
Alexey Starikovskiy | 968fc5d | 2007-10-22 14:19:15 +0400 | [diff] [blame] | 124 | struct acpi_device *device = seq->private; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 125 | int state = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 126 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | |
Alexey Starikovskiy | 968fc5d | 2007-10-22 14:19:15 +0400 | [diff] [blame] | 128 | if (device) { |
| 129 | if (acpi_bus_get_power(device->handle, &state)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | seq_printf(seq, "status: ERROR\n"); |
| 131 | else |
| 132 | seq_printf(seq, "status: %s\n", |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 133 | !state ? "on" : "off"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | } |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 135 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | } |
| 137 | |
| 138 | static int acpi_fan_state_open_fs(struct inode *inode, struct file *file) |
| 139 | { |
| 140 | return single_open(file, acpi_fan_read_state, PDE(inode)->data); |
| 141 | } |
| 142 | |
| 143 | static ssize_t |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 144 | acpi_fan_write_state(struct file *file, const char __user * buffer, |
| 145 | size_t count, loff_t * ppos) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 147 | int result = 0; |
Jan Engelhardt | 50dd096 | 2006-10-01 00:28:50 +0200 | [diff] [blame] | 148 | struct seq_file *m = file->private_data; |
Alexey Starikovskiy | 968fc5d | 2007-10-22 14:19:15 +0400 | [diff] [blame] | 149 | struct acpi_device *device = m->private; |
Yi Yang | 6594d87 | 2008-06-14 00:52:06 -0400 | [diff] [blame] | 150 | char state_string[3] = { '\0' }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | |
Alexey Starikovskiy | 968fc5d | 2007-10-22 14:19:15 +0400 | [diff] [blame] | 152 | if (count > sizeof(state_string) - 1) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 153 | return -EINVAL; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 154 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | if (copy_from_user(state_string, buffer, count)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 156 | return -EFAULT; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 157 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | state_string[count] = '\0'; |
Yi Yang | 6594d87 | 2008-06-14 00:52:06 -0400 | [diff] [blame] | 159 | if ((state_string[0] < '0') || (state_string[0] > '3')) |
| 160 | return -EINVAL; |
| 161 | if (state_string[1] == '\n') |
| 162 | state_string[1] = '\0'; |
| 163 | if (state_string[1] != '\0') |
| 164 | return -EINVAL; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 165 | |
Alexey Starikovskiy | 968fc5d | 2007-10-22 14:19:15 +0400 | [diff] [blame] | 166 | result = acpi_bus_set_power(device->handle, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 167 | simple_strtoul(state_string, NULL, 0)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | if (result) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 169 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 170 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 171 | return count; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | } |
| 173 | |
Arjan van de Ven | d750803 | 2006-07-04 13:06:00 -0400 | [diff] [blame] | 174 | static const struct file_operations acpi_fan_state_ops = { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 175 | .open = acpi_fan_state_open_fs, |
| 176 | .read = seq_read, |
| 177 | .write = acpi_fan_write_state, |
| 178 | .llseek = seq_lseek, |
| 179 | .release = single_release, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 180 | .owner = THIS_MODULE, |
| 181 | }; |
| 182 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 183 | static int acpi_fan_add_fs(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 184 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 185 | struct proc_dir_entry *entry = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | |
| 188 | if (!device) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 189 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | |
| 191 | if (!acpi_device_dir(device)) { |
| 192 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 193 | acpi_fan_dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 194 | if (!acpi_device_dir(device)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 195 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | acpi_device_dir(device)->owner = THIS_MODULE; |
| 197 | } |
| 198 | |
| 199 | /* 'status' [R/W] */ |
Denis V. Lunev | cf7acfa | 2008-04-29 01:02:27 -0700 | [diff] [blame] | 200 | entry = proc_create_data(ACPI_FAN_FILE_STATE, |
| 201 | S_IFREG | S_IRUGO | S_IWUSR, |
| 202 | acpi_device_dir(device), |
| 203 | &acpi_fan_state_ops, |
| 204 | device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 205 | if (!entry) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 206 | return -ENODEV; |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 207 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | } |
| 209 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 210 | static int acpi_fan_remove_fs(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 211 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 212 | |
| 213 | if (acpi_device_dir(device)) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 214 | remove_proc_entry(ACPI_FAN_FILE_STATE, acpi_device_dir(device)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | remove_proc_entry(acpi_device_bid(device), acpi_fan_dir); |
| 216 | acpi_device_dir(device) = NULL; |
| 217 | } |
| 218 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 219 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 220 | } |
Zhang Rui | 05a83d9 | 2008-01-17 15:51:24 +0800 | [diff] [blame] | 221 | #else |
| 222 | static int acpi_fan_add_fs(struct acpi_device *device) |
| 223 | { |
| 224 | return 0; |
| 225 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | |
Zhang Rui | 05a83d9 | 2008-01-17 15:51:24 +0800 | [diff] [blame] | 227 | static int acpi_fan_remove_fs(struct acpi_device *device) |
| 228 | { |
| 229 | return 0; |
| 230 | } |
| 231 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | /* -------------------------------------------------------------------------- |
| 233 | Driver Interface |
| 234 | -------------------------------------------------------------------------- */ |
| 235 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 236 | static int acpi_fan_add(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 237 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 238 | int result = 0; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 239 | int state = 0; |
Zhang Rui | 05a83d9 | 2008-01-17 15:51:24 +0800 | [diff] [blame] | 240 | struct thermal_cooling_device *cdev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | |
| 242 | if (!device) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 243 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | |
Pavel Machek | c65ade4 | 2005-08-05 00:37:45 -0400 | [diff] [blame] | 245 | strcpy(acpi_device_name(device), "Fan"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | strcpy(acpi_device_class(device), ACPI_FAN_CLASS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 247 | |
Patrick Mochel | dc8c2b2 | 2006-05-19 16:54:42 -0400 | [diff] [blame] | 248 | result = acpi_bus_get_power(device->handle, &state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 249 | if (result) { |
Len Brown | 6468463 | 2006-06-26 23:41:38 -0400 | [diff] [blame] | 250 | printk(KERN_ERR PREFIX "Reading power state\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | goto end; |
| 252 | } |
| 253 | |
Len Brown | ec68373 | 2008-01-23 22:41:20 -0500 | [diff] [blame] | 254 | device->flags.force_power_state = 1; |
| 255 | acpi_bus_set_power(device->handle, state); |
| 256 | device->flags.force_power_state = 0; |
| 257 | |
Zhang Rui | 05a83d9 | 2008-01-17 15:51:24 +0800 | [diff] [blame] | 258 | cdev = thermal_cooling_device_register("Fan", device, |
| 259 | &fan_cooling_ops); |
Thomas Sujith | 19b3678 | 2008-02-15 01:01:52 -0500 | [diff] [blame] | 260 | if (IS_ERR(cdev)) { |
| 261 | result = PTR_ERR(cdev); |
| 262 | goto end; |
| 263 | } |
Zhang Rui | 05a83d9 | 2008-01-17 15:51:24 +0800 | [diff] [blame] | 264 | |
Greg Kroah-Hartman | fc3a882 | 2008-05-02 06:02:41 +0200 | [diff] [blame] | 265 | dev_info(&device->dev, "registered as cooling_device%d\n", cdev->id); |
Thomas Sujith | 19b3678 | 2008-02-15 01:01:52 -0500 | [diff] [blame] | 266 | |
Pavel Machek | db89b4f | 2008-09-22 14:37:34 -0700 | [diff] [blame] | 267 | device->driver_data = cdev; |
Julia Lawall | 9030062 | 2008-04-11 10:09:24 +0800 | [diff] [blame] | 268 | result = sysfs_create_link(&device->dev.kobj, |
| 269 | &cdev->device.kobj, |
| 270 | "thermal_cooling"); |
| 271 | if (result) |
Greg Kroah-Hartman | fc3a882 | 2008-05-02 06:02:41 +0200 | [diff] [blame] | 272 | dev_err(&device->dev, "Failed to create sysfs link " |
| 273 | "'thermal_cooling'\n"); |
Julia Lawall | 9030062 | 2008-04-11 10:09:24 +0800 | [diff] [blame] | 274 | |
| 275 | result = sysfs_create_link(&cdev->device.kobj, |
| 276 | &device->dev.kobj, |
| 277 | "device"); |
| 278 | if (result) |
Greg Kroah-Hartman | fc3a882 | 2008-05-02 06:02:41 +0200 | [diff] [blame] | 279 | dev_err(&device->dev, "Failed to create sysfs link " |
| 280 | "'device'\n"); |
Zhang Rui | 05a83d9 | 2008-01-17 15:51:24 +0800 | [diff] [blame] | 281 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | result = acpi_fan_add_fs(device); |
| 283 | if (result) |
| 284 | goto end; |
| 285 | |
| 286 | printk(KERN_INFO PREFIX "%s [%s] (%s)\n", |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 287 | acpi_device_name(device), acpi_device_bid(device), |
| 288 | !device->power.state ? "on" : "off"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 289 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 290 | end: |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 291 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | } |
| 293 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 294 | static int acpi_fan_remove(struct acpi_device *device, int type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 295 | { |
Zhang Rui | 05a83d9 | 2008-01-17 15:51:24 +0800 | [diff] [blame] | 296 | struct thermal_cooling_device *cdev = acpi_driver_data(device); |
| 297 | |
| 298 | if (!device || !cdev) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 299 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 300 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 301 | acpi_fan_remove_fs(device); |
Zhang Rui | 05a83d9 | 2008-01-17 15:51:24 +0800 | [diff] [blame] | 302 | sysfs_remove_link(&device->dev.kobj, "thermal_cooling"); |
| 303 | sysfs_remove_link(&cdev->device.kobj, "device"); |
| 304 | thermal_cooling_device_unregister(cdev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 306 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 307 | } |
| 308 | |
Len Brown | ec68373 | 2008-01-23 22:41:20 -0500 | [diff] [blame] | 309 | static int acpi_fan_suspend(struct acpi_device *device, pm_message_t state) |
| 310 | { |
| 311 | if (!device) |
| 312 | return -EINVAL; |
| 313 | |
| 314 | acpi_bus_set_power(device->handle, ACPI_STATE_D0); |
| 315 | |
| 316 | return AE_OK; |
| 317 | } |
| 318 | |
| 319 | static int acpi_fan_resume(struct acpi_device *device) |
| 320 | { |
| 321 | int result = 0; |
| 322 | int power_state = 0; |
| 323 | |
| 324 | if (!device) |
| 325 | return -EINVAL; |
| 326 | |
| 327 | result = acpi_bus_get_power(device->handle, &power_state); |
| 328 | if (result) { |
Lin Ming | 55ac9a0 | 2008-09-28 14:51:56 +0800 | [diff] [blame] | 329 | printk(KERN_ERR PREFIX |
| 330 | "Error reading fan power state\n"); |
Len Brown | ec68373 | 2008-01-23 22:41:20 -0500 | [diff] [blame] | 331 | return result; |
| 332 | } |
| 333 | |
| 334 | device->flags.force_power_state = 1; |
| 335 | acpi_bus_set_power(device->handle, power_state); |
| 336 | device->flags.force_power_state = 0; |
| 337 | |
| 338 | return result; |
| 339 | } |
| 340 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 341 | static int __init acpi_fan_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | { |
Pavel Machek | c65ade4 | 2005-08-05 00:37:45 -0400 | [diff] [blame] | 343 | int result = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | |
Len Brown | 3c60284 | 2008-02-02 04:05:54 -0500 | [diff] [blame] | 346 | #ifdef CONFIG_ACPI_PROCFS |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | acpi_fan_dir = proc_mkdir(ACPI_FAN_CLASS, acpi_root_dir); |
| 348 | if (!acpi_fan_dir) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 349 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 350 | acpi_fan_dir->owner = THIS_MODULE; |
Len Brown | 3c60284 | 2008-02-02 04:05:54 -0500 | [diff] [blame] | 351 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 352 | |
| 353 | result = acpi_bus_register_driver(&acpi_fan_driver); |
| 354 | if (result < 0) { |
| 355 | remove_proc_entry(ACPI_FAN_CLASS, acpi_root_dir); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 356 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 357 | } |
| 358 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 359 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | } |
| 361 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 362 | static void __exit acpi_fan_exit(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 363 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | |
| 365 | acpi_bus_unregister_driver(&acpi_fan_driver); |
| 366 | |
| 367 | remove_proc_entry(ACPI_FAN_CLASS, acpi_root_dir); |
| 368 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 369 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 370 | } |
| 371 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 372 | module_init(acpi_fan_init); |
| 373 | module_exit(acpi_fan_exit); |