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 | |
Len Brown | a192a95 | 2009-07-28 16:45:54 -0400 | [diff] [blame] | 37 | #define PREFIX "ACPI: " |
| 38 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | #define ACPI_FAN_CLASS "fan" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | #define ACPI_FAN_FILE_STATE "state" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | |
| 42 | #define _COMPONENT ACPI_FAN_COMPONENT |
Len Brown | f52fd66 | 2007-02-12 22:42:12 -0500 | [diff] [blame] | 43 | ACPI_MODULE_NAME("fan"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | |
Len Brown | f52fd66 | 2007-02-12 22:42:12 -0500 | [diff] [blame] | 45 | MODULE_AUTHOR("Paul Diefenbaugh"); |
Len Brown | 7cda93e | 2007-02-12 23:50:02 -0500 | [diff] [blame] | 46 | MODULE_DESCRIPTION("ACPI Fan Driver"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | MODULE_LICENSE("GPL"); |
| 48 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 49 | static int acpi_fan_add(struct acpi_device *device); |
| 50 | static int acpi_fan_remove(struct acpi_device *device, int type); |
Len Brown | ec68373 | 2008-01-23 22:41:20 -0500 | [diff] [blame] | 51 | static int acpi_fan_suspend(struct acpi_device *device, pm_message_t state); |
| 52 | static int acpi_fan_resume(struct acpi_device *device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | |
Thomas Renninger | 1ba90e3 | 2007-07-23 14:44:41 +0200 | [diff] [blame] | 54 | static const struct acpi_device_id fan_device_ids[] = { |
| 55 | {"PNP0C0B", 0}, |
| 56 | {"", 0}, |
| 57 | }; |
| 58 | MODULE_DEVICE_TABLE(acpi, fan_device_ids); |
| 59 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | static struct acpi_driver acpi_fan_driver = { |
Len Brown | c2b6705 | 2007-02-12 23:33:40 -0500 | [diff] [blame] | 61 | .name = "fan", |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 62 | .class = ACPI_FAN_CLASS, |
Thomas Renninger | 1ba90e3 | 2007-07-23 14:44:41 +0200 | [diff] [blame] | 63 | .ids = fan_device_ids, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 64 | .ops = { |
| 65 | .add = acpi_fan_add, |
| 66 | .remove = acpi_fan_remove, |
Len Brown | ec68373 | 2008-01-23 22:41:20 -0500 | [diff] [blame] | 67 | .suspend = acpi_fan_suspend, |
| 68 | .resume = acpi_fan_resume, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 69 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | }; |
| 71 | |
Zhang Rui | 05a83d9 | 2008-01-17 15:51:24 +0800 | [diff] [blame] | 72 | /* thermal cooling device callbacks */ |
Matthew Garrett | 6503e5d | 2008-11-27 17:48:13 +0000 | [diff] [blame] | 73 | static int fan_get_max_state(struct thermal_cooling_device *cdev, unsigned long |
| 74 | *state) |
Zhang Rui | 05a83d9 | 2008-01-17 15:51:24 +0800 | [diff] [blame] | 75 | { |
| 76 | /* ACPI fan device only support two states: ON/OFF */ |
Matthew Garrett | 6503e5d | 2008-11-27 17:48:13 +0000 | [diff] [blame] | 77 | *state = 1; |
| 78 | return 0; |
Zhang Rui | 05a83d9 | 2008-01-17 15:51:24 +0800 | [diff] [blame] | 79 | } |
| 80 | |
Matthew Garrett | 6503e5d | 2008-11-27 17:48:13 +0000 | [diff] [blame] | 81 | static int fan_get_cur_state(struct thermal_cooling_device *cdev, unsigned long |
| 82 | *state) |
Zhang Rui | 05a83d9 | 2008-01-17 15:51:24 +0800 | [diff] [blame] | 83 | { |
| 84 | struct acpi_device *device = cdev->devdata; |
Zhang Rui | 05a83d9 | 2008-01-17 15:51:24 +0800 | [diff] [blame] | 85 | int result; |
Matthew Garrett | 6503e5d | 2008-11-27 17:48:13 +0000 | [diff] [blame] | 86 | int acpi_state; |
Zhang Rui | 05a83d9 | 2008-01-17 15:51:24 +0800 | [diff] [blame] | 87 | |
| 88 | if (!device) |
| 89 | return -EINVAL; |
| 90 | |
Matthew Garrett | 6503e5d | 2008-11-27 17:48:13 +0000 | [diff] [blame] | 91 | result = acpi_bus_get_power(device->handle, &acpi_state); |
Zhang Rui | 05a83d9 | 2008-01-17 15:51:24 +0800 | [diff] [blame] | 92 | if (result) |
| 93 | return result; |
| 94 | |
Matthew Garrett | 6503e5d | 2008-11-27 17:48:13 +0000 | [diff] [blame] | 95 | *state = (acpi_state == ACPI_STATE_D3 ? 0 : |
| 96 | (acpi_state == ACPI_STATE_D0 ? 1 : -1)); |
| 97 | return 0; |
Zhang Rui | 05a83d9 | 2008-01-17 15:51:24 +0800 | [diff] [blame] | 98 | } |
| 99 | |
| 100 | static int |
Matthew Garrett | 6503e5d | 2008-11-27 17:48:13 +0000 | [diff] [blame] | 101 | fan_set_cur_state(struct thermal_cooling_device *cdev, unsigned long state) |
Zhang Rui | 05a83d9 | 2008-01-17 15:51:24 +0800 | [diff] [blame] | 102 | { |
| 103 | struct acpi_device *device = cdev->devdata; |
| 104 | int result; |
| 105 | |
| 106 | if (!device || (state != 0 && state != 1)) |
| 107 | return -EINVAL; |
| 108 | |
| 109 | result = acpi_bus_set_power(device->handle, |
| 110 | state ? ACPI_STATE_D0 : ACPI_STATE_D3); |
| 111 | |
| 112 | return result; |
| 113 | } |
| 114 | |
| 115 | static struct thermal_cooling_device_ops fan_cooling_ops = { |
| 116 | .get_max_state = fan_get_max_state, |
| 117 | .get_cur_state = fan_get_cur_state, |
| 118 | .set_cur_state = fan_set_cur_state, |
| 119 | }; |
| 120 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | /* -------------------------------------------------------------------------- |
| 122 | FS Interface (/proc) |
| 123 | -------------------------------------------------------------------------- */ |
Zhang Rui | 05a83d9 | 2008-01-17 15:51:24 +0800 | [diff] [blame] | 124 | #ifdef CONFIG_ACPI_PROCFS |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 126 | static struct proc_dir_entry *acpi_fan_dir; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 128 | static int acpi_fan_read_state(struct seq_file *seq, void *offset) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | { |
Alexey Starikovskiy | 968fc5d | 2007-10-22 14:19:15 +0400 | [diff] [blame] | 130 | struct acpi_device *device = seq->private; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 131 | int state = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | |
Alexey Starikovskiy | 968fc5d | 2007-10-22 14:19:15 +0400 | [diff] [blame] | 134 | if (device) { |
| 135 | if (acpi_bus_get_power(device->handle, &state)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | seq_printf(seq, "status: ERROR\n"); |
| 137 | else |
| 138 | seq_printf(seq, "status: %s\n", |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 139 | !state ? "on" : "off"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | } |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 141 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | } |
| 143 | |
| 144 | static int acpi_fan_state_open_fs(struct inode *inode, struct file *file) |
| 145 | { |
| 146 | return single_open(file, acpi_fan_read_state, PDE(inode)->data); |
| 147 | } |
| 148 | |
| 149 | static ssize_t |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 150 | acpi_fan_write_state(struct file *file, const char __user * buffer, |
| 151 | size_t count, loff_t * ppos) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 153 | int result = 0; |
Jan Engelhardt | 50dd096 | 2006-10-01 00:28:50 +0200 | [diff] [blame] | 154 | struct seq_file *m = file->private_data; |
Alexey Starikovskiy | 968fc5d | 2007-10-22 14:19:15 +0400 | [diff] [blame] | 155 | struct acpi_device *device = m->private; |
Yi Yang | 6594d87 | 2008-06-14 00:52:06 -0400 | [diff] [blame] | 156 | char state_string[3] = { '\0' }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | |
Alexey Starikovskiy | 968fc5d | 2007-10-22 14:19:15 +0400 | [diff] [blame] | 158 | if (count > sizeof(state_string) - 1) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 159 | return -EINVAL; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 160 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | if (copy_from_user(state_string, buffer, count)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 162 | return -EFAULT; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 163 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | state_string[count] = '\0'; |
Yi Yang | 6594d87 | 2008-06-14 00:52:06 -0400 | [diff] [blame] | 165 | if ((state_string[0] < '0') || (state_string[0] > '3')) |
| 166 | return -EINVAL; |
| 167 | if (state_string[1] == '\n') |
| 168 | state_string[1] = '\0'; |
| 169 | if (state_string[1] != '\0') |
| 170 | return -EINVAL; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 171 | |
Alexey Starikovskiy | 968fc5d | 2007-10-22 14:19:15 +0400 | [diff] [blame] | 172 | result = acpi_bus_set_power(device->handle, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 173 | simple_strtoul(state_string, NULL, 0)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | if (result) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 175 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 177 | return count; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | } |
| 179 | |
Arjan van de Ven | d750803 | 2006-07-04 13:06:00 -0400 | [diff] [blame] | 180 | static const struct file_operations acpi_fan_state_ops = { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 181 | .open = acpi_fan_state_open_fs, |
| 182 | .read = seq_read, |
| 183 | .write = acpi_fan_write_state, |
| 184 | .llseek = seq_lseek, |
| 185 | .release = single_release, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | .owner = THIS_MODULE, |
| 187 | }; |
| 188 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 189 | static int acpi_fan_add_fs(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 191 | struct proc_dir_entry *entry = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | |
| 194 | if (!device) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 195 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | |
| 197 | if (!acpi_device_dir(device)) { |
| 198 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 199 | acpi_fan_dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | if (!acpi_device_dir(device)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 201 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | } |
| 203 | |
| 204 | /* 'status' [R/W] */ |
Denis V. Lunev | cf7acfa | 2008-04-29 01:02:27 -0700 | [diff] [blame] | 205 | entry = proc_create_data(ACPI_FAN_FILE_STATE, |
| 206 | S_IFREG | S_IRUGO | S_IWUSR, |
| 207 | acpi_device_dir(device), |
| 208 | &acpi_fan_state_ops, |
| 209 | device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 210 | if (!entry) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 211 | return -ENODEV; |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 212 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 213 | } |
| 214 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 215 | static int acpi_fan_remove_fs(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 216 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | |
| 218 | if (acpi_device_dir(device)) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 219 | remove_proc_entry(ACPI_FAN_FILE_STATE, acpi_device_dir(device)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 220 | remove_proc_entry(acpi_device_bid(device), acpi_fan_dir); |
| 221 | acpi_device_dir(device) = NULL; |
| 222 | } |
| 223 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 224 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | } |
Zhang Rui | 05a83d9 | 2008-01-17 15:51:24 +0800 | [diff] [blame] | 226 | #else |
| 227 | static int acpi_fan_add_fs(struct acpi_device *device) |
| 228 | { |
| 229 | return 0; |
| 230 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | |
Zhang Rui | 05a83d9 | 2008-01-17 15:51:24 +0800 | [diff] [blame] | 232 | static int acpi_fan_remove_fs(struct acpi_device *device) |
| 233 | { |
| 234 | return 0; |
| 235 | } |
| 236 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 237 | /* -------------------------------------------------------------------------- |
| 238 | Driver Interface |
| 239 | -------------------------------------------------------------------------- */ |
| 240 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 241 | static int acpi_fan_add(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 242 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 243 | int result = 0; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 244 | int state = 0; |
Zhang Rui | 05a83d9 | 2008-01-17 15:51:24 +0800 | [diff] [blame] | 245 | struct thermal_cooling_device *cdev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | |
| 247 | if (!device) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 248 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 249 | |
Pavel Machek | c65ade4 | 2005-08-05 00:37:45 -0400 | [diff] [blame] | 250 | strcpy(acpi_device_name(device), "Fan"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | strcpy(acpi_device_class(device), ACPI_FAN_CLASS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | |
Patrick Mochel | dc8c2b2 | 2006-05-19 16:54:42 -0400 | [diff] [blame] | 253 | result = acpi_bus_get_power(device->handle, &state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | if (result) { |
Len Brown | 6468463 | 2006-06-26 23:41:38 -0400 | [diff] [blame] | 255 | printk(KERN_ERR PREFIX "Reading power state\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | goto end; |
| 257 | } |
| 258 | |
Len Brown | ec68373 | 2008-01-23 22:41:20 -0500 | [diff] [blame] | 259 | device->flags.force_power_state = 1; |
| 260 | acpi_bus_set_power(device->handle, state); |
| 261 | device->flags.force_power_state = 0; |
| 262 | |
Zhang Rui | 05a83d9 | 2008-01-17 15:51:24 +0800 | [diff] [blame] | 263 | cdev = thermal_cooling_device_register("Fan", device, |
| 264 | &fan_cooling_ops); |
Thomas Sujith | 19b3678 | 2008-02-15 01:01:52 -0500 | [diff] [blame] | 265 | if (IS_ERR(cdev)) { |
| 266 | result = PTR_ERR(cdev); |
| 267 | goto end; |
| 268 | } |
Zhang Rui | 05a83d9 | 2008-01-17 15:51:24 +0800 | [diff] [blame] | 269 | |
Mike Travis | 13c4115 | 2009-12-14 13:38:30 -0800 | [diff] [blame] | 270 | dev_dbg(&device->dev, "registered as cooling_device%d\n", cdev->id); |
Thomas Sujith | 19b3678 | 2008-02-15 01:01:52 -0500 | [diff] [blame] | 271 | |
Pavel Machek | db89b4f | 2008-09-22 14:37:34 -0700 | [diff] [blame] | 272 | device->driver_data = cdev; |
Julia Lawall | 9030062 | 2008-04-11 10:09:24 +0800 | [diff] [blame] | 273 | result = sysfs_create_link(&device->dev.kobj, |
| 274 | &cdev->device.kobj, |
| 275 | "thermal_cooling"); |
| 276 | if (result) |
Greg Kroah-Hartman | fc3a882 | 2008-05-02 06:02:41 +0200 | [diff] [blame] | 277 | dev_err(&device->dev, "Failed to create sysfs link " |
| 278 | "'thermal_cooling'\n"); |
Julia Lawall | 9030062 | 2008-04-11 10:09:24 +0800 | [diff] [blame] | 279 | |
| 280 | result = sysfs_create_link(&cdev->device.kobj, |
| 281 | &device->dev.kobj, |
| 282 | "device"); |
| 283 | if (result) |
Greg Kroah-Hartman | fc3a882 | 2008-05-02 06:02:41 +0200 | [diff] [blame] | 284 | dev_err(&device->dev, "Failed to create sysfs link " |
| 285 | "'device'\n"); |
Zhang Rui | 05a83d9 | 2008-01-17 15:51:24 +0800 | [diff] [blame] | 286 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | result = acpi_fan_add_fs(device); |
| 288 | if (result) |
| 289 | goto end; |
| 290 | |
| 291 | printk(KERN_INFO PREFIX "%s [%s] (%s)\n", |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 292 | acpi_device_name(device), acpi_device_bid(device), |
| 293 | !device->power.state ? "on" : "off"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 294 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 295 | end: |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 296 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 297 | } |
| 298 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 299 | static int acpi_fan_remove(struct acpi_device *device, int type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 300 | { |
Zhang Rui | 05a83d9 | 2008-01-17 15:51:24 +0800 | [diff] [blame] | 301 | struct thermal_cooling_device *cdev = acpi_driver_data(device); |
| 302 | |
| 303 | if (!device || !cdev) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 304 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 306 | acpi_fan_remove_fs(device); |
Zhang Rui | 05a83d9 | 2008-01-17 15:51:24 +0800 | [diff] [blame] | 307 | sysfs_remove_link(&device->dev.kobj, "thermal_cooling"); |
| 308 | sysfs_remove_link(&cdev->device.kobj, "device"); |
| 309 | thermal_cooling_device_unregister(cdev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 310 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 311 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 312 | } |
| 313 | |
Len Brown | ec68373 | 2008-01-23 22:41:20 -0500 | [diff] [blame] | 314 | static int acpi_fan_suspend(struct acpi_device *device, pm_message_t state) |
| 315 | { |
| 316 | if (!device) |
| 317 | return -EINVAL; |
| 318 | |
| 319 | acpi_bus_set_power(device->handle, ACPI_STATE_D0); |
| 320 | |
| 321 | return AE_OK; |
| 322 | } |
| 323 | |
| 324 | static int acpi_fan_resume(struct acpi_device *device) |
| 325 | { |
| 326 | int result = 0; |
| 327 | int power_state = 0; |
| 328 | |
| 329 | if (!device) |
| 330 | return -EINVAL; |
| 331 | |
| 332 | result = acpi_bus_get_power(device->handle, &power_state); |
| 333 | if (result) { |
Lin Ming | 55ac9a0 | 2008-09-28 14:51:56 +0800 | [diff] [blame] | 334 | printk(KERN_ERR PREFIX |
| 335 | "Error reading fan power state\n"); |
Len Brown | ec68373 | 2008-01-23 22:41:20 -0500 | [diff] [blame] | 336 | return result; |
| 337 | } |
| 338 | |
| 339 | device->flags.force_power_state = 1; |
| 340 | acpi_bus_set_power(device->handle, power_state); |
| 341 | device->flags.force_power_state = 0; |
| 342 | |
| 343 | return result; |
| 344 | } |
| 345 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 346 | static int __init acpi_fan_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | { |
Pavel Machek | c65ade4 | 2005-08-05 00:37:45 -0400 | [diff] [blame] | 348 | int result = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 349 | |
Len Brown | 3c60284 | 2008-02-02 04:05:54 -0500 | [diff] [blame] | 350 | #ifdef CONFIG_ACPI_PROCFS |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 351 | acpi_fan_dir = proc_mkdir(ACPI_FAN_CLASS, acpi_root_dir); |
| 352 | if (!acpi_fan_dir) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 353 | return -ENODEV; |
Len Brown | 3c60284 | 2008-02-02 04:05:54 -0500 | [diff] [blame] | 354 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 355 | |
| 356 | result = acpi_bus_register_driver(&acpi_fan_driver); |
| 357 | if (result < 0) { |
Liang Li | 934231d | 2010-06-10 13:42:49 +0800 | [diff] [blame] | 358 | #ifdef CONFIG_ACPI_PROCFS |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | remove_proc_entry(ACPI_FAN_CLASS, acpi_root_dir); |
Liang Li | 934231d | 2010-06-10 13:42:49 +0800 | [diff] [blame] | 360 | #endif |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 361 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 362 | } |
| 363 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 364 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 365 | } |
| 366 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 367 | static void __exit acpi_fan_exit(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 368 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 369 | |
| 370 | acpi_bus_unregister_driver(&acpi_fan_driver); |
| 371 | |
| 372 | remove_proc_entry(ACPI_FAN_CLASS, acpi_root_dir); |
| 373 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 374 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 375 | } |
| 376 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 377 | module_init(acpi_fan_init); |
| 378 | module_exit(acpi_fan_exit); |