Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 1 | /* |
| 2 | * dock.c - ACPI dock station driver |
| 3 | * |
| 4 | * Copyright (C) 2006 Kristen Carlson Accardi <kristen.c.accardi@intel.com> |
| 5 | * |
| 6 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License as published by |
| 10 | * the Free Software Foundation; either version 2 of the License, or (at |
| 11 | * your option) any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, but |
| 14 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 16 | * General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License along |
| 19 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 20 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. |
| 21 | * |
| 22 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 23 | */ |
| 24 | |
| 25 | #include <linux/kernel.h> |
| 26 | #include <linux/module.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 27 | #include <linux/slab.h> |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 28 | #include <linux/init.h> |
| 29 | #include <linux/types.h> |
| 30 | #include <linux/notifier.h> |
Kristen Carlson Accardi | 671adbe | 2006-12-04 14:49:43 -0800 | [diff] [blame] | 31 | #include <linux/platform_device.h> |
Al Viro | 914e263 | 2006-10-18 13:55:46 -0400 | [diff] [blame] | 32 | #include <linux/jiffies.h> |
Randy Dunlap | 62a6d7f | 2007-03-26 21:38:49 -0800 | [diff] [blame] | 33 | #include <linux/stddef.h> |
Toshi Kani | cd73018 | 2012-11-20 23:42:30 +0000 | [diff] [blame] | 34 | #include <linux/acpi.h> |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 35 | #include <acpi/acpi_bus.h> |
| 36 | #include <acpi/acpi_drivers.h> |
| 37 | |
Len Brown | a192a95 | 2009-07-28 16:45:54 -0400 | [diff] [blame] | 38 | #define PREFIX "ACPI: " |
| 39 | |
Len Brown | 7cda93e | 2007-02-12 23:50:02 -0500 | [diff] [blame] | 40 | #define ACPI_DOCK_DRIVER_DESCRIPTION "ACPI Dock Station Driver" |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 41 | |
Len Brown | f52fd66 | 2007-02-12 22:42:12 -0500 | [diff] [blame] | 42 | ACPI_MODULE_NAME("dock"); |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 43 | MODULE_AUTHOR("Kristen Carlson Accardi"); |
Len Brown | 7cda93e | 2007-02-12 23:50:02 -0500 | [diff] [blame] | 44 | MODULE_DESCRIPTION(ACPI_DOCK_DRIVER_DESCRIPTION); |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 45 | MODULE_LICENSE("GPL"); |
| 46 | |
Rusty Russell | 90ab5ee | 2012-01-13 09:32:20 +1030 | [diff] [blame] | 47 | static bool immediate_undock = 1; |
Kristen Carlson Accardi | a0cd35f | 2007-05-09 15:08:15 -0700 | [diff] [blame] | 48 | module_param(immediate_undock, bool, 0644); |
| 49 | MODULE_PARM_DESC(immediate_undock, "1 (default) will cause the driver to " |
| 50 | "undock immediately when the undock button is pressed, 0 will cause" |
| 51 | " the driver to wait for userspace to write the undock sysfs file " |
| 52 | " before undocking"); |
| 53 | |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 54 | static struct atomic_notifier_head dock_notifier_list; |
| 55 | |
Frank Seidel | a340af1 | 2007-12-07 13:20:42 +0100 | [diff] [blame] | 56 | static const struct acpi_device_id dock_device_ids[] = { |
| 57 | {"LNXDOCK", 0}, |
| 58 | {"", 0}, |
| 59 | }; |
| 60 | MODULE_DEVICE_TABLE(acpi, dock_device_ids); |
| 61 | |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 62 | struct dock_station { |
| 63 | acpi_handle handle; |
| 64 | unsigned long last_dock_time; |
| 65 | u32 flags; |
| 66 | spinlock_t dd_lock; |
Kristen Carlson Accardi | 8b0dc86 | 2006-10-30 11:18:45 -0800 | [diff] [blame] | 67 | struct mutex hp_lock; |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 68 | struct list_head dependent_devices; |
Shaohua Li | db350b0 | 2008-08-28 10:03:58 +0800 | [diff] [blame] | 69 | |
Alex Chiang | 50d716e | 2009-10-01 11:59:23 -0600 | [diff] [blame] | 70 | struct list_head sibling; |
Shaohua Li | db350b0 | 2008-08-28 10:03:58 +0800 | [diff] [blame] | 71 | struct platform_device *dock_device; |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 72 | }; |
Shaohua Li | db350b0 | 2008-08-28 10:03:58 +0800 | [diff] [blame] | 73 | static LIST_HEAD(dock_stations); |
| 74 | static int dock_station_count; |
Rafael J. Wysocki | 21a3101 | 2013-06-24 11:22:53 +0200 | [diff] [blame] | 75 | static DEFINE_MUTEX(hotplug_lock); |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 76 | |
| 77 | struct dock_dependent_device { |
| 78 | struct list_head list; |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 79 | acpi_handle handle; |
Rafael J. Wysocki | 21a3101 | 2013-06-24 11:22:53 +0200 | [diff] [blame] | 80 | const struct acpi_dock_ops *hp_ops; |
| 81 | void *hp_context; |
| 82 | unsigned int hp_refcount; |
| 83 | void (*hp_release)(void *); |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 84 | }; |
| 85 | |
| 86 | #define DOCK_DOCKING 0x00000001 |
Kristen Carlson Accardi | a0cd35f | 2007-05-09 15:08:15 -0700 | [diff] [blame] | 87 | #define DOCK_UNDOCKING 0x00000002 |
Shaohua Li | db350b0 | 2008-08-28 10:03:58 +0800 | [diff] [blame] | 88 | #define DOCK_IS_DOCK 0x00000010 |
| 89 | #define DOCK_IS_ATA 0x00000020 |
| 90 | #define DOCK_IS_BAT 0x00000040 |
Kristen Carlson Accardi | 5669021 | 2006-08-01 14:59:19 -0700 | [diff] [blame] | 91 | #define DOCK_EVENT 3 |
| 92 | #define UNDOCK_EVENT 2 |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 93 | |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 94 | /***************************************************************************** |
| 95 | * Dock Dependent device functions * |
| 96 | *****************************************************************************/ |
| 97 | /** |
Alex Chiang | f69cfdd | 2009-10-19 15:14:29 -0600 | [diff] [blame] | 98 | * add_dock_dependent_device - associate a device with the dock station |
| 99 | * @ds: The dock station |
| 100 | * @handle: handle of the dependent device |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 101 | * |
Alex Chiang | f69cfdd | 2009-10-19 15:14:29 -0600 | [diff] [blame] | 102 | * Add the dependent device to the dock's dependent device list. |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 103 | */ |
Alex Chiang | f69cfdd | 2009-10-19 15:14:29 -0600 | [diff] [blame] | 104 | static int |
| 105 | add_dock_dependent_device(struct dock_station *ds, acpi_handle handle) |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 106 | { |
| 107 | struct dock_dependent_device *dd; |
| 108 | |
| 109 | dd = kzalloc(sizeof(*dd), GFP_KERNEL); |
Alex Chiang | f69cfdd | 2009-10-19 15:14:29 -0600 | [diff] [blame] | 110 | if (!dd) |
| 111 | return -ENOMEM; |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 112 | |
Alex Chiang | f69cfdd | 2009-10-19 15:14:29 -0600 | [diff] [blame] | 113 | dd->handle = handle; |
| 114 | INIT_LIST_HEAD(&dd->list); |
Alex Chiang | f69cfdd | 2009-10-19 15:14:29 -0600 | [diff] [blame] | 115 | |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 116 | spin_lock(&ds->dd_lock); |
| 117 | list_add_tail(&dd->list, &ds->dependent_devices); |
| 118 | spin_unlock(&ds->dd_lock); |
Alex Chiang | f69cfdd | 2009-10-19 15:14:29 -0600 | [diff] [blame] | 119 | |
| 120 | return 0; |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 121 | } |
| 122 | |
| 123 | /** |
Rafael J. Wysocki | 21a3101 | 2013-06-24 11:22:53 +0200 | [diff] [blame] | 124 | * dock_init_hotplug - Initialize a hotplug device on a docking station. |
| 125 | * @dd: Dock-dependent device. |
| 126 | * @ops: Dock operations to attach to the dependent device. |
| 127 | * @context: Data to pass to the @ops callbacks and @release. |
| 128 | * @init: Optional initialization routine to run after setting up context. |
| 129 | * @release: Optional release routine to run on removal. |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 130 | */ |
Rafael J. Wysocki | 21a3101 | 2013-06-24 11:22:53 +0200 | [diff] [blame] | 131 | static int dock_init_hotplug(struct dock_dependent_device *dd, |
| 132 | const struct acpi_dock_ops *ops, void *context, |
| 133 | void (*init)(void *), void (*release)(void *)) |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 134 | { |
Rafael J. Wysocki | 21a3101 | 2013-06-24 11:22:53 +0200 | [diff] [blame] | 135 | int ret = 0; |
| 136 | |
| 137 | mutex_lock(&hotplug_lock); |
| 138 | |
| 139 | if (dd->hp_context) { |
| 140 | ret = -EEXIST; |
| 141 | } else { |
| 142 | dd->hp_refcount = 1; |
| 143 | dd->hp_ops = ops; |
| 144 | dd->hp_context = context; |
| 145 | dd->hp_release = release; |
| 146 | } |
| 147 | |
| 148 | if (!WARN_ON(ret) && init) |
| 149 | init(context); |
| 150 | |
| 151 | mutex_unlock(&hotplug_lock); |
| 152 | return ret; |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 153 | } |
| 154 | |
| 155 | /** |
Rafael J. Wysocki | 21a3101 | 2013-06-24 11:22:53 +0200 | [diff] [blame] | 156 | * dock_release_hotplug - Decrement hotplug reference counter of dock device. |
| 157 | * @dd: Dock-dependent device. |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 158 | * |
Rafael J. Wysocki | 21a3101 | 2013-06-24 11:22:53 +0200 | [diff] [blame] | 159 | * Decrement the reference counter of @dd and if 0, detach its hotplug |
| 160 | * operations from it, reset its context pointer and run the optional release |
| 161 | * routine if present. |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 162 | */ |
Rafael J. Wysocki | 21a3101 | 2013-06-24 11:22:53 +0200 | [diff] [blame] | 163 | static void dock_release_hotplug(struct dock_dependent_device *dd) |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 164 | { |
Rafael J. Wysocki | 21a3101 | 2013-06-24 11:22:53 +0200 | [diff] [blame] | 165 | void (*release)(void *) = NULL; |
| 166 | void *context = NULL; |
| 167 | |
| 168 | mutex_lock(&hotplug_lock); |
| 169 | |
| 170 | if (dd->hp_context && !--dd->hp_refcount) { |
| 171 | dd->hp_ops = NULL; |
| 172 | context = dd->hp_context; |
| 173 | dd->hp_context = NULL; |
| 174 | release = dd->hp_release; |
| 175 | dd->hp_release = NULL; |
| 176 | } |
| 177 | |
| 178 | if (release && context) |
| 179 | release(context); |
| 180 | |
| 181 | mutex_unlock(&hotplug_lock); |
| 182 | } |
| 183 | |
| 184 | static void dock_hotplug_event(struct dock_dependent_device *dd, u32 event, |
| 185 | bool uevent) |
| 186 | { |
| 187 | acpi_notify_handler cb = NULL; |
| 188 | bool run = false; |
| 189 | |
| 190 | mutex_lock(&hotplug_lock); |
| 191 | |
| 192 | if (dd->hp_context) { |
| 193 | run = true; |
| 194 | dd->hp_refcount++; |
| 195 | if (dd->hp_ops) |
| 196 | cb = uevent ? dd->hp_ops->uevent : dd->hp_ops->handler; |
| 197 | } |
| 198 | |
| 199 | mutex_unlock(&hotplug_lock); |
| 200 | |
| 201 | if (!run) |
| 202 | return; |
| 203 | |
| 204 | if (cb) |
| 205 | cb(dd->handle, event, dd->hp_context); |
| 206 | |
| 207 | dock_release_hotplug(dd); |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 208 | } |
| 209 | |
| 210 | /** |
| 211 | * find_dock_dependent_device - get a device dependent on this dock |
| 212 | * @ds: the dock station |
| 213 | * @handle: the acpi_handle of the device we want |
| 214 | * |
| 215 | * iterate over the dependent device list for this dock. If the |
| 216 | * dependent device matches the handle, return. |
| 217 | */ |
| 218 | static struct dock_dependent_device * |
| 219 | find_dock_dependent_device(struct dock_station *ds, acpi_handle handle) |
| 220 | { |
| 221 | struct dock_dependent_device *dd; |
| 222 | |
| 223 | spin_lock(&ds->dd_lock); |
| 224 | list_for_each_entry(dd, &ds->dependent_devices, list) { |
| 225 | if (handle == dd->handle) { |
| 226 | spin_unlock(&ds->dd_lock); |
| 227 | return dd; |
| 228 | } |
| 229 | } |
| 230 | spin_unlock(&ds->dd_lock); |
| 231 | return NULL; |
| 232 | } |
| 233 | |
| 234 | /***************************************************************************** |
| 235 | * Dock functions * |
| 236 | *****************************************************************************/ |
| 237 | /** |
| 238 | * is_dock - see if a device is a dock station |
| 239 | * @handle: acpi handle of the device |
| 240 | * |
| 241 | * If an acpi object has a _DCK method, then it is by definition a dock |
| 242 | * station, so return true. |
| 243 | */ |
| 244 | static int is_dock(acpi_handle handle) |
| 245 | { |
| 246 | acpi_status status; |
| 247 | acpi_handle tmp; |
| 248 | |
| 249 | status = acpi_get_handle(handle, "_DCK", &tmp); |
| 250 | if (ACPI_FAILURE(status)) |
| 251 | return 0; |
| 252 | return 1; |
| 253 | } |
| 254 | |
Shaohua Li | db350b0 | 2008-08-28 10:03:58 +0800 | [diff] [blame] | 255 | static int is_ejectable(acpi_handle handle) |
| 256 | { |
| 257 | acpi_status status; |
| 258 | acpi_handle tmp; |
| 259 | |
| 260 | status = acpi_get_handle(handle, "_EJ0", &tmp); |
| 261 | if (ACPI_FAILURE(status)) |
| 262 | return 0; |
| 263 | return 1; |
| 264 | } |
| 265 | |
| 266 | static int is_ata(acpi_handle handle) |
| 267 | { |
| 268 | acpi_handle tmp; |
| 269 | |
| 270 | if ((ACPI_SUCCESS(acpi_get_handle(handle, "_GTF", &tmp))) || |
| 271 | (ACPI_SUCCESS(acpi_get_handle(handle, "_GTM", &tmp))) || |
| 272 | (ACPI_SUCCESS(acpi_get_handle(handle, "_STM", &tmp))) || |
| 273 | (ACPI_SUCCESS(acpi_get_handle(handle, "_SDD", &tmp)))) |
| 274 | return 1; |
| 275 | |
| 276 | return 0; |
| 277 | } |
| 278 | |
| 279 | static int is_battery(acpi_handle handle) |
| 280 | { |
| 281 | struct acpi_device_info *info; |
Shaohua Li | db350b0 | 2008-08-28 10:03:58 +0800 | [diff] [blame] | 282 | int ret = 1; |
| 283 | |
Bob Moore | 15b8dd5 | 2009-06-29 13:39:29 +0800 | [diff] [blame] | 284 | if (!ACPI_SUCCESS(acpi_get_object_info(handle, &info))) |
Shaohua Li | db350b0 | 2008-08-28 10:03:58 +0800 | [diff] [blame] | 285 | return 0; |
Shaohua Li | db350b0 | 2008-08-28 10:03:58 +0800 | [diff] [blame] | 286 | if (!(info->valid & ACPI_VALID_HID)) |
| 287 | ret = 0; |
| 288 | else |
Bob Moore | 15b8dd5 | 2009-06-29 13:39:29 +0800 | [diff] [blame] | 289 | ret = !strcmp("PNP0C0A", info->hardware_id.string); |
Shaohua Li | db350b0 | 2008-08-28 10:03:58 +0800 | [diff] [blame] | 290 | |
Bob Moore | 15b8dd5 | 2009-06-29 13:39:29 +0800 | [diff] [blame] | 291 | kfree(info); |
Shaohua Li | db350b0 | 2008-08-28 10:03:58 +0800 | [diff] [blame] | 292 | return ret; |
| 293 | } |
| 294 | |
| 295 | static int is_ejectable_bay(acpi_handle handle) |
| 296 | { |
| 297 | acpi_handle phandle; |
Alex Chiang | 747479a | 2009-10-19 15:14:50 -0600 | [diff] [blame] | 298 | |
Shaohua Li | db350b0 | 2008-08-28 10:03:58 +0800 | [diff] [blame] | 299 | if (!is_ejectable(handle)) |
| 300 | return 0; |
| 301 | if (is_battery(handle) || is_ata(handle)) |
| 302 | return 1; |
| 303 | if (!acpi_get_parent(handle, &phandle) && is_ata(phandle)) |
| 304 | return 1; |
| 305 | return 0; |
| 306 | } |
| 307 | |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 308 | /** |
| 309 | * is_dock_device - see if a device is on a dock station |
| 310 | * @handle: acpi handle of the device |
| 311 | * |
| 312 | * If this device is either the dock station itself, |
| 313 | * or is a device dependent on the dock station, then it |
| 314 | * is a dock device |
| 315 | */ |
| 316 | int is_dock_device(acpi_handle handle) |
| 317 | { |
Shaohua Li | db350b0 | 2008-08-28 10:03:58 +0800 | [diff] [blame] | 318 | struct dock_station *dock_station; |
| 319 | |
| 320 | if (!dock_station_count) |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 321 | return 0; |
| 322 | |
Shaohua Li | db350b0 | 2008-08-28 10:03:58 +0800 | [diff] [blame] | 323 | if (is_dock(handle)) |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 324 | return 1; |
Alex Chiang | 747479a | 2009-10-19 15:14:50 -0600 | [diff] [blame] | 325 | |
| 326 | list_for_each_entry(dock_station, &dock_stations, sibling) |
Shaohua Li | db350b0 | 2008-08-28 10:03:58 +0800 | [diff] [blame] | 327 | if (find_dock_dependent_device(dock_station, handle)) |
| 328 | return 1; |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 329 | |
| 330 | return 0; |
| 331 | } |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 332 | EXPORT_SYMBOL_GPL(is_dock_device); |
| 333 | |
| 334 | /** |
| 335 | * dock_present - see if the dock station is present. |
| 336 | * @ds: the dock station |
| 337 | * |
| 338 | * execute the _STA method. note that present does not |
| 339 | * imply that we are docked. |
| 340 | */ |
| 341 | static int dock_present(struct dock_station *ds) |
| 342 | { |
Matthew Wilcox | 27663c5 | 2008-10-10 02:22:59 -0400 | [diff] [blame] | 343 | unsigned long long sta; |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 344 | acpi_status status; |
| 345 | |
| 346 | if (ds) { |
| 347 | status = acpi_evaluate_integer(ds->handle, "_STA", NULL, &sta); |
| 348 | if (ACPI_SUCCESS(status) && sta) |
| 349 | return 1; |
| 350 | } |
| 351 | return 0; |
| 352 | } |
| 353 | |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 354 | /** |
| 355 | * dock_create_acpi_device - add new devices to acpi |
| 356 | * @handle - handle of the device to add |
| 357 | * |
| 358 | * This function will create a new acpi_device for the given |
| 359 | * handle if one does not exist already. This should cause |
| 360 | * acpi to scan for drivers for the given devices, and call |
| 361 | * matching driver's add routine. |
| 362 | * |
| 363 | * Returns a pointer to the acpi_device corresponding to the handle. |
| 364 | */ |
| 365 | static struct acpi_device * dock_create_acpi_device(acpi_handle handle) |
| 366 | { |
Alex Chiang | 747479a | 2009-10-19 15:14:50 -0600 | [diff] [blame] | 367 | struct acpi_device *device; |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 368 | int ret; |
| 369 | |
| 370 | if (acpi_bus_get_device(handle, &device)) { |
| 371 | /* |
| 372 | * no device created for this object, |
| 373 | * so we should create one. |
| 374 | */ |
Rafael J. Wysocki | b8bd759 | 2013-01-19 01:27:35 +0100 | [diff] [blame] | 375 | ret = acpi_bus_scan(handle); |
Rafael J. Wysocki | 636458d | 2012-12-21 00:36:47 +0100 | [diff] [blame] | 376 | if (ret) |
Alex Chiang | 747479a | 2009-10-19 15:14:50 -0600 | [diff] [blame] | 377 | pr_debug("error adding bus, %x\n", -ret); |
Rafael J. Wysocki | 0cd6ac5 | 2012-12-21 00:36:49 +0100 | [diff] [blame] | 378 | |
| 379 | acpi_bus_get_device(handle, &device); |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 380 | } |
| 381 | return device; |
| 382 | } |
| 383 | |
| 384 | /** |
| 385 | * dock_remove_acpi_device - remove the acpi_device struct from acpi |
| 386 | * @handle - the handle of the device to remove |
| 387 | * |
| 388 | * Tell acpi to remove the acpi_device. This should cause any loaded |
| 389 | * driver to have it's remove routine called. |
| 390 | */ |
| 391 | static void dock_remove_acpi_device(acpi_handle handle) |
| 392 | { |
| 393 | struct acpi_device *device; |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 394 | |
Rafael J. Wysocki | bfee26d | 2013-01-26 00:27:44 +0100 | [diff] [blame] | 395 | if (!acpi_bus_get_device(handle, &device)) |
| 396 | acpi_bus_trim(device); |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 397 | } |
| 398 | |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 399 | /** |
| 400 | * hotplug_dock_devices - insert or remove devices on the dock station |
| 401 | * @ds: the dock station |
| 402 | * @event: either bus check or eject request |
| 403 | * |
| 404 | * Some devices on the dock station need to have drivers called |
| 405 | * to perform hotplug operations after a dock event has occurred. |
| 406 | * Traverse the list of dock devices that have registered a |
| 407 | * hotplug handler, and call the handler. |
| 408 | */ |
| 409 | static void hotplug_dock_devices(struct dock_station *ds, u32 event) |
| 410 | { |
| 411 | struct dock_dependent_device *dd; |
| 412 | |
Kristen Carlson Accardi | 8b0dc86 | 2006-10-30 11:18:45 -0800 | [diff] [blame] | 413 | mutex_lock(&ds->hp_lock); |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 414 | |
| 415 | /* |
| 416 | * First call driver specific hotplug functions |
| 417 | */ |
Rafael J. Wysocki | 21a3101 | 2013-06-24 11:22:53 +0200 | [diff] [blame] | 418 | list_for_each_entry(dd, &ds->dependent_devices, list) |
| 419 | dock_hotplug_event(dd, event, false); |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 420 | |
| 421 | /* |
| 422 | * Now make sure that an acpi_device is created for each |
| 423 | * dependent device, or removed if this is an eject request. |
| 424 | * This will cause acpi_drivers to be stopped/started if they |
| 425 | * exist |
| 426 | */ |
| 427 | list_for_each_entry(dd, &ds->dependent_devices, list) { |
| 428 | if (event == ACPI_NOTIFY_EJECT_REQUEST) |
| 429 | dock_remove_acpi_device(dd->handle); |
| 430 | else |
| 431 | dock_create_acpi_device(dd->handle); |
| 432 | } |
Kristen Carlson Accardi | 8b0dc86 | 2006-10-30 11:18:45 -0800 | [diff] [blame] | 433 | mutex_unlock(&ds->hp_lock); |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 434 | } |
| 435 | |
| 436 | static void dock_event(struct dock_station *ds, u32 event, int num) |
| 437 | { |
Shaohua Li | db350b0 | 2008-08-28 10:03:58 +0800 | [diff] [blame] | 438 | struct device *dev = &ds->dock_device->dev; |
Holger Macht | 66b5682 | 2007-08-10 13:10:32 -0700 | [diff] [blame] | 439 | char event_string[13]; |
Kristen Carlson Accardi | 79a8f70 | 2007-05-09 15:10:22 -0700 | [diff] [blame] | 440 | char *envp[] = { event_string, NULL }; |
Shaohua Li | 1253f7a | 2008-08-28 10:06:16 +0800 | [diff] [blame] | 441 | struct dock_dependent_device *dd; |
Kristen Carlson Accardi | 79a8f70 | 2007-05-09 15:10:22 -0700 | [diff] [blame] | 442 | |
| 443 | if (num == UNDOCK_EVENT) |
Holger Macht | 66b5682 | 2007-08-10 13:10:32 -0700 | [diff] [blame] | 444 | sprintf(event_string, "EVENT=undock"); |
Kristen Carlson Accardi | 79a8f70 | 2007-05-09 15:10:22 -0700 | [diff] [blame] | 445 | else |
Holger Macht | 66b5682 | 2007-08-10 13:10:32 -0700 | [diff] [blame] | 446 | sprintf(event_string, "EVENT=dock"); |
Kristen Carlson Accardi | 79a8f70 | 2007-05-09 15:10:22 -0700 | [diff] [blame] | 447 | |
Kristen Carlson Accardi | 5669021 | 2006-08-01 14:59:19 -0700 | [diff] [blame] | 448 | /* |
Kristen Carlson Accardi | 8ea86e0 | 2006-12-11 12:05:08 -0800 | [diff] [blame] | 449 | * Indicate that the status of the dock station has |
| 450 | * changed. |
Kristen Carlson Accardi | 5669021 | 2006-08-01 14:59:19 -0700 | [diff] [blame] | 451 | */ |
Shaohua Li | 1253f7a | 2008-08-28 10:06:16 +0800 | [diff] [blame] | 452 | if (num == DOCK_EVENT) |
| 453 | kobject_uevent_env(&dev->kobj, KOBJ_CHANGE, envp); |
| 454 | |
Rafael J. Wysocki | 21a3101 | 2013-06-24 11:22:53 +0200 | [diff] [blame] | 455 | list_for_each_entry(dd, &ds->dependent_devices, list) |
| 456 | dock_hotplug_event(dd, event, true); |
Alex Chiang | 747479a | 2009-10-19 15:14:50 -0600 | [diff] [blame] | 457 | |
Shaohua Li | 1253f7a | 2008-08-28 10:06:16 +0800 | [diff] [blame] | 458 | if (num != DOCK_EVENT) |
| 459 | kobject_uevent_env(&dev->kobj, KOBJ_CHANGE, envp); |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 460 | } |
| 461 | |
| 462 | /** |
| 463 | * eject_dock - respond to a dock eject request |
| 464 | * @ds: the dock station |
| 465 | * |
| 466 | * This is called after _DCK is called, to execute the dock station's |
| 467 | * _EJ0 method. |
| 468 | */ |
| 469 | static void eject_dock(struct dock_station *ds) |
| 470 | { |
| 471 | struct acpi_object_list arg_list; |
| 472 | union acpi_object arg; |
| 473 | acpi_status status; |
| 474 | acpi_handle tmp; |
| 475 | |
| 476 | /* all dock devices should have _EJ0, but check anyway */ |
| 477 | status = acpi_get_handle(ds->handle, "_EJ0", &tmp); |
| 478 | if (ACPI_FAILURE(status)) { |
| 479 | pr_debug("No _EJ0 support for dock device\n"); |
| 480 | return; |
| 481 | } |
| 482 | |
| 483 | arg_list.count = 1; |
| 484 | arg_list.pointer = &arg; |
| 485 | arg.type = ACPI_TYPE_INTEGER; |
| 486 | arg.integer.value = 1; |
| 487 | |
Alex Chiang | 747479a | 2009-10-19 15:14:50 -0600 | [diff] [blame] | 488 | status = acpi_evaluate_object(ds->handle, "_EJ0", &arg_list, NULL); |
| 489 | if (ACPI_FAILURE(status)) |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 490 | pr_debug("Failed to evaluate _EJ0!\n"); |
| 491 | } |
| 492 | |
| 493 | /** |
| 494 | * handle_dock - handle a dock event |
| 495 | * @ds: the dock station |
| 496 | * @dock: to dock, or undock - that is the question |
| 497 | * |
| 498 | * Execute the _DCK method in response to an acpi event |
| 499 | */ |
| 500 | static void handle_dock(struct dock_station *ds, int dock) |
| 501 | { |
| 502 | acpi_status status; |
| 503 | struct acpi_object_list arg_list; |
| 504 | union acpi_object arg; |
| 505 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 506 | |
Toshi Kani | cd73018 | 2012-11-20 23:42:30 +0000 | [diff] [blame] | 507 | acpi_handle_info(ds->handle, "%s\n", dock ? "docking" : "undocking"); |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 508 | |
| 509 | /* _DCK method has one argument */ |
| 510 | arg_list.count = 1; |
| 511 | arg_list.pointer = &arg; |
| 512 | arg.type = ACPI_TYPE_INTEGER; |
| 513 | arg.integer.value = dock; |
| 514 | status = acpi_evaluate_object(ds->handle, "_DCK", &arg_list, &buffer); |
Shaohua Li | db350b0 | 2008-08-28 10:03:58 +0800 | [diff] [blame] | 515 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) |
Toshi Kani | cd73018 | 2012-11-20 23:42:30 +0000 | [diff] [blame] | 516 | acpi_handle_err(ds->handle, "Failed to execute _DCK (0x%x)\n", |
| 517 | status); |
Thomas Renninger | 0a918a9 | 2008-10-11 00:15:04 -0400 | [diff] [blame] | 518 | |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 519 | kfree(buffer.pointer); |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 520 | } |
| 521 | |
| 522 | static inline void dock(struct dock_station *ds) |
| 523 | { |
| 524 | handle_dock(ds, 1); |
| 525 | } |
| 526 | |
| 527 | static inline void undock(struct dock_station *ds) |
| 528 | { |
| 529 | handle_dock(ds, 0); |
| 530 | } |
| 531 | |
| 532 | static inline void begin_dock(struct dock_station *ds) |
| 533 | { |
| 534 | ds->flags |= DOCK_DOCKING; |
| 535 | } |
| 536 | |
| 537 | static inline void complete_dock(struct dock_station *ds) |
| 538 | { |
| 539 | ds->flags &= ~(DOCK_DOCKING); |
| 540 | ds->last_dock_time = jiffies; |
| 541 | } |
| 542 | |
Kristen Carlson Accardi | a0cd35f | 2007-05-09 15:08:15 -0700 | [diff] [blame] | 543 | static inline void begin_undock(struct dock_station *ds) |
| 544 | { |
| 545 | ds->flags |= DOCK_UNDOCKING; |
| 546 | } |
| 547 | |
| 548 | static inline void complete_undock(struct dock_station *ds) |
| 549 | { |
| 550 | ds->flags &= ~(DOCK_UNDOCKING); |
| 551 | } |
| 552 | |
Shaohua Li | 406f692 | 2008-08-28 10:03:26 +0800 | [diff] [blame] | 553 | static void dock_lock(struct dock_station *ds, int lock) |
| 554 | { |
| 555 | struct acpi_object_list arg_list; |
| 556 | union acpi_object arg; |
| 557 | acpi_status status; |
| 558 | |
| 559 | arg_list.count = 1; |
| 560 | arg_list.pointer = &arg; |
| 561 | arg.type = ACPI_TYPE_INTEGER; |
| 562 | arg.integer.value = !!lock; |
| 563 | status = acpi_evaluate_object(ds->handle, "_LCK", &arg_list, NULL); |
| 564 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { |
| 565 | if (lock) |
Toshi Kani | cd73018 | 2012-11-20 23:42:30 +0000 | [diff] [blame] | 566 | acpi_handle_warn(ds->handle, |
| 567 | "Locking device failed (0x%x)\n", status); |
Shaohua Li | 406f692 | 2008-08-28 10:03:26 +0800 | [diff] [blame] | 568 | else |
Toshi Kani | cd73018 | 2012-11-20 23:42:30 +0000 | [diff] [blame] | 569 | acpi_handle_warn(ds->handle, |
| 570 | "Unlocking device failed (0x%x)\n", status); |
Shaohua Li | 406f692 | 2008-08-28 10:03:26 +0800 | [diff] [blame] | 571 | } |
| 572 | } |
| 573 | |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 574 | /** |
| 575 | * dock_in_progress - see if we are in the middle of handling a dock event |
| 576 | * @ds: the dock station |
| 577 | * |
| 578 | * Sometimes while docking, false dock events can be sent to the driver |
| 579 | * because good connections aren't made or some other reason. Ignore these |
| 580 | * if we are in the middle of doing something. |
| 581 | */ |
| 582 | static int dock_in_progress(struct dock_station *ds) |
| 583 | { |
| 584 | if ((ds->flags & DOCK_DOCKING) || |
| 585 | time_before(jiffies, (ds->last_dock_time + HZ))) |
| 586 | return 1; |
| 587 | return 0; |
| 588 | } |
| 589 | |
| 590 | /** |
| 591 | * register_dock_notifier - add yourself to the dock notifier list |
| 592 | * @nb: the callers notifier block |
| 593 | * |
| 594 | * If a driver wishes to be notified about dock events, they can |
| 595 | * use this function to put a notifier block on the dock notifier list. |
| 596 | * this notifier call chain will be called after a dock event, but |
| 597 | * before hotplugging any new devices. |
| 598 | */ |
| 599 | int register_dock_notifier(struct notifier_block *nb) |
| 600 | { |
Shaohua Li | db350b0 | 2008-08-28 10:03:58 +0800 | [diff] [blame] | 601 | if (!dock_station_count) |
Prarit Bhargava | 2548c06 | 2006-12-04 14:50:17 -0800 | [diff] [blame] | 602 | return -ENODEV; |
| 603 | |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 604 | return atomic_notifier_chain_register(&dock_notifier_list, nb); |
| 605 | } |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 606 | EXPORT_SYMBOL_GPL(register_dock_notifier); |
| 607 | |
| 608 | /** |
| 609 | * unregister_dock_notifier - remove yourself from the dock notifier list |
| 610 | * @nb: the callers notifier block |
| 611 | */ |
| 612 | void unregister_dock_notifier(struct notifier_block *nb) |
| 613 | { |
Shaohua Li | db350b0 | 2008-08-28 10:03:58 +0800 | [diff] [blame] | 614 | if (!dock_station_count) |
Prarit Bhargava | 2548c06 | 2006-12-04 14:50:17 -0800 | [diff] [blame] | 615 | return; |
| 616 | |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 617 | atomic_notifier_chain_unregister(&dock_notifier_list, nb); |
| 618 | } |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 619 | EXPORT_SYMBOL_GPL(unregister_dock_notifier); |
| 620 | |
| 621 | /** |
| 622 | * register_hotplug_dock_device - register a hotplug function |
| 623 | * @handle: the handle of the device |
Shaohua Li | 1253f7a | 2008-08-28 10:06:16 +0800 | [diff] [blame] | 624 | * @ops: handlers to call after docking |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 625 | * @context: device specific data |
Rafael J. Wysocki | 21a3101 | 2013-06-24 11:22:53 +0200 | [diff] [blame] | 626 | * @init: Optional initialization routine to run after registration |
| 627 | * @release: Optional release routine to run on unregistration |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 628 | * |
| 629 | * If a driver would like to perform a hotplug operation after a dock |
| 630 | * event, they can register an acpi_notifiy_handler to be called by |
| 631 | * the dock driver after _DCK is executed. |
| 632 | */ |
Rafael J. Wysocki | 21a3101 | 2013-06-24 11:22:53 +0200 | [diff] [blame] | 633 | int register_hotplug_dock_device(acpi_handle handle, |
| 634 | const struct acpi_dock_ops *ops, void *context, |
| 635 | void (*init)(void *), void (*release)(void *)) |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 636 | { |
| 637 | struct dock_dependent_device *dd; |
Shaohua Li | db350b0 | 2008-08-28 10:03:58 +0800 | [diff] [blame] | 638 | struct dock_station *dock_station; |
Shaohua Li | 61b8369 | 2008-08-28 10:07:14 +0800 | [diff] [blame] | 639 | int ret = -EINVAL; |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 640 | |
Rafael J. Wysocki | 21a3101 | 2013-06-24 11:22:53 +0200 | [diff] [blame] | 641 | if (WARN_ON(!context)) |
| 642 | return -EINVAL; |
| 643 | |
Shaohua Li | db350b0 | 2008-08-28 10:03:58 +0800 | [diff] [blame] | 644 | if (!dock_station_count) |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 645 | return -ENODEV; |
| 646 | |
| 647 | /* |
| 648 | * make sure this handle is for a device dependent on the dock, |
| 649 | * this would include the dock station itself |
| 650 | */ |
Alex Chiang | 50d716e | 2009-10-01 11:59:23 -0600 | [diff] [blame] | 651 | list_for_each_entry(dock_station, &dock_stations, sibling) { |
Shaohua Li | 61b8369 | 2008-08-28 10:07:14 +0800 | [diff] [blame] | 652 | /* |
| 653 | * An ATA bay can be in a dock and itself can be ejected |
Daniel Mack | 3ad2f3f | 2010-02-03 08:01:28 +0800 | [diff] [blame] | 654 | * separately, so there are two 'dock stations' which need the |
Shaohua Li | 61b8369 | 2008-08-28 10:07:14 +0800 | [diff] [blame] | 655 | * ops |
| 656 | */ |
Shaohua Li | db350b0 | 2008-08-28 10:03:58 +0800 | [diff] [blame] | 657 | dd = find_dock_dependent_device(dock_station, handle); |
Rafael J. Wysocki | 21a3101 | 2013-06-24 11:22:53 +0200 | [diff] [blame] | 658 | if (dd && !dock_init_hotplug(dd, ops, context, init, release)) |
Shaohua Li | 61b8369 | 2008-08-28 10:07:14 +0800 | [diff] [blame] | 659 | ret = 0; |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 660 | } |
| 661 | |
Shaohua Li | 61b8369 | 2008-08-28 10:07:14 +0800 | [diff] [blame] | 662 | return ret; |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 663 | } |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 664 | EXPORT_SYMBOL_GPL(register_hotplug_dock_device); |
| 665 | |
| 666 | /** |
| 667 | * unregister_hotplug_dock_device - remove yourself from the hotplug list |
| 668 | * @handle: the acpi handle of the device |
| 669 | */ |
| 670 | void unregister_hotplug_dock_device(acpi_handle handle) |
| 671 | { |
| 672 | struct dock_dependent_device *dd; |
Shaohua Li | db350b0 | 2008-08-28 10:03:58 +0800 | [diff] [blame] | 673 | struct dock_station *dock_station; |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 674 | |
Shaohua Li | db350b0 | 2008-08-28 10:03:58 +0800 | [diff] [blame] | 675 | if (!dock_station_count) |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 676 | return; |
| 677 | |
Alex Chiang | 50d716e | 2009-10-01 11:59:23 -0600 | [diff] [blame] | 678 | list_for_each_entry(dock_station, &dock_stations, sibling) { |
Shaohua Li | db350b0 | 2008-08-28 10:03:58 +0800 | [diff] [blame] | 679 | dd = find_dock_dependent_device(dock_station, handle); |
| 680 | if (dd) |
Rafael J. Wysocki | 21a3101 | 2013-06-24 11:22:53 +0200 | [diff] [blame] | 681 | dock_release_hotplug(dd); |
Shaohua Li | db350b0 | 2008-08-28 10:03:58 +0800 | [diff] [blame] | 682 | } |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 683 | } |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 684 | EXPORT_SYMBOL_GPL(unregister_hotplug_dock_device); |
| 685 | |
| 686 | /** |
brandon@ifup.org | c80fdbe | 2006-12-04 14:49:58 -0800 | [diff] [blame] | 687 | * handle_eject_request - handle an undock request checking for error conditions |
| 688 | * |
| 689 | * Check to make sure the dock device is still present, then undock and |
| 690 | * hotremove all the devices that may need removing. |
| 691 | */ |
| 692 | static int handle_eject_request(struct dock_station *ds, u32 event) |
| 693 | { |
brandon@ifup.org | c80fdbe | 2006-12-04 14:49:58 -0800 | [diff] [blame] | 694 | if (dock_in_progress(ds)) |
| 695 | return -EBUSY; |
| 696 | |
| 697 | /* |
| 698 | * here we need to generate the undock |
| 699 | * event prior to actually doing the undock |
| 700 | * so that the device struct still exists. |
Holger Macht | afd7301 | 2008-08-06 17:56:01 +0200 | [diff] [blame] | 701 | * Also, even send the dock event if the |
| 702 | * device is not present anymore |
brandon@ifup.org | c80fdbe | 2006-12-04 14:49:58 -0800 | [diff] [blame] | 703 | */ |
| 704 | dock_event(ds, event, UNDOCK_EVENT); |
Holger Macht | afd7301 | 2008-08-06 17:56:01 +0200 | [diff] [blame] | 705 | |
brandon@ifup.org | c80fdbe | 2006-12-04 14:49:58 -0800 | [diff] [blame] | 706 | hotplug_dock_devices(ds, ACPI_NOTIFY_EJECT_REQUEST); |
| 707 | undock(ds); |
Shaohua Li | 406f692 | 2008-08-28 10:03:26 +0800 | [diff] [blame] | 708 | dock_lock(ds, 0); |
brandon@ifup.org | c80fdbe | 2006-12-04 14:49:58 -0800 | [diff] [blame] | 709 | eject_dock(ds); |
| 710 | if (dock_present(ds)) { |
Toshi Kani | cd73018 | 2012-11-20 23:42:30 +0000 | [diff] [blame] | 711 | acpi_handle_err(ds->handle, "Unable to undock!\n"); |
brandon@ifup.org | c80fdbe | 2006-12-04 14:49:58 -0800 | [diff] [blame] | 712 | return -EBUSY; |
| 713 | } |
Kristen Carlson Accardi | a0cd35f | 2007-05-09 15:08:15 -0700 | [diff] [blame] | 714 | complete_undock(ds); |
brandon@ifup.org | c80fdbe | 2006-12-04 14:49:58 -0800 | [diff] [blame] | 715 | return 0; |
| 716 | } |
| 717 | |
| 718 | /** |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 719 | * dock_notify - act upon an acpi dock notification |
| 720 | * @handle: the dock station handle |
| 721 | * @event: the acpi event |
| 722 | * @data: our driver data struct |
| 723 | * |
| 724 | * If we are notified to dock, then check to see if the dock is |
| 725 | * present and then dock. Notify all drivers of the dock event, |
brandon@ifup.org | c80fdbe | 2006-12-04 14:49:58 -0800 | [diff] [blame] | 726 | * and then hotplug and devices that may need hotplugging. |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 727 | */ |
| 728 | static void dock_notify(acpi_handle handle, u32 event, void *data) |
| 729 | { |
Jan Engelhardt | 50dd096 | 2006-10-01 00:28:50 +0200 | [diff] [blame] | 730 | struct dock_station *ds = data; |
Shaohua Li | 8b59560 | 2008-08-28 10:02:03 +0800 | [diff] [blame] | 731 | struct acpi_device *tmp; |
Shaohua Li | db350b0 | 2008-08-28 10:03:58 +0800 | [diff] [blame] | 732 | int surprise_removal = 0; |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 733 | |
Shaohua Li | db350b0 | 2008-08-28 10:03:58 +0800 | [diff] [blame] | 734 | /* |
| 735 | * According to acpi spec 3.0a, if a DEVICE_CHECK notification |
| 736 | * is sent and _DCK is present, it is assumed to mean an undock |
| 737 | * request. |
| 738 | */ |
| 739 | if ((ds->flags & DOCK_IS_DOCK) && event == ACPI_NOTIFY_DEVICE_CHECK) |
| 740 | event = ACPI_NOTIFY_EJECT_REQUEST; |
| 741 | |
| 742 | /* |
| 743 | * dock station: BUS_CHECK - docked or surprise removal |
| 744 | * DEVICE_CHECK - undocked |
| 745 | * other device: BUS_CHECK/DEVICE_CHECK - added or surprise removal |
| 746 | * |
| 747 | * To simplify event handling, dock dependent device handler always |
| 748 | * get ACPI_NOTIFY_BUS_CHECK/ACPI_NOTIFY_DEVICE_CHECK for add and |
| 749 | * ACPI_NOTIFY_EJECT_REQUEST for removal |
| 750 | */ |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 751 | switch (event) { |
| 752 | case ACPI_NOTIFY_BUS_CHECK: |
Shaohua Li | db350b0 | 2008-08-28 10:03:58 +0800 | [diff] [blame] | 753 | case ACPI_NOTIFY_DEVICE_CHECK: |
Shaohua Li | 8b59560 | 2008-08-28 10:02:03 +0800 | [diff] [blame] | 754 | if (!dock_in_progress(ds) && acpi_bus_get_device(ds->handle, |
| 755 | &tmp)) { |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 756 | begin_dock(ds); |
| 757 | dock(ds); |
| 758 | if (!dock_present(ds)) { |
Toshi Kani | cd73018 | 2012-11-20 23:42:30 +0000 | [diff] [blame] | 759 | acpi_handle_err(handle, "Unable to dock!\n"); |
Shaohua Li | 8b59560 | 2008-08-28 10:02:03 +0800 | [diff] [blame] | 760 | complete_dock(ds); |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 761 | break; |
| 762 | } |
| 763 | atomic_notifier_call_chain(&dock_notifier_list, |
| 764 | event, NULL); |
| 765 | hotplug_dock_devices(ds, event); |
| 766 | complete_dock(ds); |
| 767 | dock_event(ds, event, DOCK_EVENT); |
Shaohua Li | 406f692 | 2008-08-28 10:03:26 +0800 | [diff] [blame] | 768 | dock_lock(ds, 1); |
Lin Ming | 3a37898 | 2010-12-13 13:36:15 +0800 | [diff] [blame] | 769 | acpi_update_all_gpes(); |
Shaohua Li | db350b0 | 2008-08-28 10:03:58 +0800 | [diff] [blame] | 770 | break; |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 771 | } |
Shaohua Li | db350b0 | 2008-08-28 10:03:58 +0800 | [diff] [blame] | 772 | if (dock_present(ds) || dock_in_progress(ds)) |
| 773 | break; |
| 774 | /* This is a surprise removal */ |
| 775 | surprise_removal = 1; |
| 776 | event = ACPI_NOTIFY_EJECT_REQUEST; |
| 777 | /* Fall back */ |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 778 | case ACPI_NOTIFY_EJECT_REQUEST: |
Kristen Carlson Accardi | a0cd35f | 2007-05-09 15:08:15 -0700 | [diff] [blame] | 779 | begin_undock(ds); |
Shaohua Li | f730ae1 | 2008-08-28 10:05:45 +0800 | [diff] [blame] | 780 | if ((immediate_undock && !(ds->flags & DOCK_IS_ATA)) |
| 781 | || surprise_removal) |
Kristen Carlson Accardi | a0cd35f | 2007-05-09 15:08:15 -0700 | [diff] [blame] | 782 | handle_eject_request(ds, event); |
| 783 | else |
| 784 | dock_event(ds, event, UNDOCK_EVENT); |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 785 | break; |
| 786 | default: |
Toshi Kani | cd73018 | 2012-11-20 23:42:30 +0000 | [diff] [blame] | 787 | acpi_handle_err(handle, "Unknown dock event %d\n", event); |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 788 | } |
| 789 | } |
| 790 | |
Zhang Rui | 19cd847 | 2008-08-28 10:05:06 +0800 | [diff] [blame] | 791 | struct dock_data { |
| 792 | acpi_handle handle; |
| 793 | unsigned long event; |
| 794 | struct dock_station *ds; |
| 795 | }; |
| 796 | |
| 797 | static void acpi_dock_deferred_cb(void *context) |
| 798 | { |
Alex Chiang | 747479a | 2009-10-19 15:14:50 -0600 | [diff] [blame] | 799 | struct dock_data *data = context; |
Zhang Rui | 19cd847 | 2008-08-28 10:05:06 +0800 | [diff] [blame] | 800 | |
Rafael J. Wysocki | 3757b94 | 2013-02-13 14:36:47 +0100 | [diff] [blame] | 801 | acpi_scan_lock_acquire(); |
Zhang Rui | 19cd847 | 2008-08-28 10:05:06 +0800 | [diff] [blame] | 802 | dock_notify(data->handle, data->event, data->ds); |
Rafael J. Wysocki | 3757b94 | 2013-02-13 14:36:47 +0100 | [diff] [blame] | 803 | acpi_scan_lock_release(); |
Zhang Rui | 19cd847 | 2008-08-28 10:05:06 +0800 | [diff] [blame] | 804 | kfree(data); |
| 805 | } |
| 806 | |
Shaohua Li | 6bd00a6 | 2008-08-28 10:04:29 +0800 | [diff] [blame] | 807 | static int acpi_dock_notifier_call(struct notifier_block *this, |
| 808 | unsigned long event, void *data) |
| 809 | { |
| 810 | struct dock_station *dock_station; |
Alex Chiang | 747479a | 2009-10-19 15:14:50 -0600 | [diff] [blame] | 811 | acpi_handle handle = data; |
Shaohua Li | 6bd00a6 | 2008-08-28 10:04:29 +0800 | [diff] [blame] | 812 | |
| 813 | if (event != ACPI_NOTIFY_BUS_CHECK && event != ACPI_NOTIFY_DEVICE_CHECK |
| 814 | && event != ACPI_NOTIFY_EJECT_REQUEST) |
| 815 | return 0; |
Rafael J. Wysocki | 3757b94 | 2013-02-13 14:36:47 +0100 | [diff] [blame] | 816 | |
| 817 | acpi_scan_lock_acquire(); |
| 818 | |
Alex Chiang | 50d716e | 2009-10-01 11:59:23 -0600 | [diff] [blame] | 819 | list_for_each_entry(dock_station, &dock_stations, sibling) { |
Shaohua Li | 6bd00a6 | 2008-08-28 10:04:29 +0800 | [diff] [blame] | 820 | if (dock_station->handle == handle) { |
Alex Chiang | 747479a | 2009-10-19 15:14:50 -0600 | [diff] [blame] | 821 | struct dock_data *dd; |
Rafael J. Wysocki | 3757b94 | 2013-02-13 14:36:47 +0100 | [diff] [blame] | 822 | acpi_status status; |
Zhang Rui | 19cd847 | 2008-08-28 10:05:06 +0800 | [diff] [blame] | 823 | |
Alex Chiang | 747479a | 2009-10-19 15:14:50 -0600 | [diff] [blame] | 824 | dd = kmalloc(sizeof(*dd), GFP_KERNEL); |
| 825 | if (!dd) |
Rafael J. Wysocki | 3757b94 | 2013-02-13 14:36:47 +0100 | [diff] [blame] | 826 | break; |
| 827 | |
Alex Chiang | 747479a | 2009-10-19 15:14:50 -0600 | [diff] [blame] | 828 | dd->handle = handle; |
| 829 | dd->event = event; |
| 830 | dd->ds = dock_station; |
Rafael J. Wysocki | 3757b94 | 2013-02-13 14:36:47 +0100 | [diff] [blame] | 831 | status = acpi_os_hotplug_execute(acpi_dock_deferred_cb, |
| 832 | dd); |
| 833 | if (ACPI_FAILURE(status)) |
| 834 | kfree(dd); |
| 835 | |
| 836 | break; |
Shaohua Li | 6bd00a6 | 2008-08-28 10:04:29 +0800 | [diff] [blame] | 837 | } |
| 838 | } |
Rafael J. Wysocki | 3757b94 | 2013-02-13 14:36:47 +0100 | [diff] [blame] | 839 | |
| 840 | acpi_scan_lock_release(); |
Shaohua Li | 6bd00a6 | 2008-08-28 10:04:29 +0800 | [diff] [blame] | 841 | return 0; |
| 842 | } |
| 843 | |
| 844 | static struct notifier_block dock_acpi_notifier = { |
| 845 | .notifier_call = acpi_dock_notifier_call, |
| 846 | }; |
| 847 | |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 848 | /** |
| 849 | * find_dock_devices - find devices on the dock station |
| 850 | * @handle: the handle of the device we are examining |
| 851 | * @lvl: unused |
| 852 | * @context: the dock station private data |
| 853 | * @rv: unused |
| 854 | * |
| 855 | * This function is called by acpi_walk_namespace. It will |
| 856 | * check to see if an object has an _EJD method. If it does, then it |
| 857 | * will see if it is dependent on the dock station. |
| 858 | */ |
| 859 | static acpi_status |
| 860 | find_dock_devices(acpi_handle handle, u32 lvl, void *context, void **rv) |
| 861 | { |
| 862 | acpi_status status; |
Kristen Carlson Accardi | fe9a2f7 | 2007-02-02 22:33:00 -0500 | [diff] [blame] | 863 | acpi_handle tmp, parent; |
Jan Engelhardt | 50dd096 | 2006-10-01 00:28:50 +0200 | [diff] [blame] | 864 | struct dock_station *ds = context; |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 865 | |
| 866 | status = acpi_bus_get_ejd(handle, &tmp); |
Kristen Carlson Accardi | fe9a2f7 | 2007-02-02 22:33:00 -0500 | [diff] [blame] | 867 | if (ACPI_FAILURE(status)) { |
| 868 | /* try the parent device as well */ |
| 869 | status = acpi_get_parent(handle, &parent); |
| 870 | if (ACPI_FAILURE(status)) |
| 871 | goto fdd_out; |
| 872 | /* see if parent is dependent on dock */ |
| 873 | status = acpi_bus_get_ejd(parent, &tmp); |
| 874 | if (ACPI_FAILURE(status)) |
| 875 | goto fdd_out; |
| 876 | } |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 877 | |
Alex Chiang | f69cfdd | 2009-10-19 15:14:29 -0600 | [diff] [blame] | 878 | if (tmp == ds->handle) |
| 879 | add_dock_dependent_device(ds, handle); |
| 880 | |
Kristen Carlson Accardi | fe9a2f7 | 2007-02-02 22:33:00 -0500 | [diff] [blame] | 881 | fdd_out: |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 882 | return AE_OK; |
| 883 | } |
| 884 | |
brandon@ifup.org | c80fdbe | 2006-12-04 14:49:58 -0800 | [diff] [blame] | 885 | /* |
| 886 | * show_docked - read method for "docked" file in sysfs |
| 887 | */ |
| 888 | static ssize_t show_docked(struct device *dev, |
| 889 | struct device_attribute *attr, char *buf) |
| 890 | { |
Holger Macht | fc5a9f8 | 2009-01-20 12:18:24 +0100 | [diff] [blame] | 891 | struct acpi_device *tmp; |
| 892 | |
Alex Chiang | fe06fba | 2009-10-19 15:14:45 -0600 | [diff] [blame] | 893 | struct dock_station *dock_station = dev->platform_data; |
brandon@ifup.org | c80fdbe | 2006-12-04 14:49:58 -0800 | [diff] [blame] | 894 | |
Yasuaki Ishimatsu | 02df734 | 2013-01-31 03:23:53 +0000 | [diff] [blame] | 895 | if (!acpi_bus_get_device(dock_station->handle, &tmp)) |
Holger Macht | fc5a9f8 | 2009-01-20 12:18:24 +0100 | [diff] [blame] | 896 | return snprintf(buf, PAGE_SIZE, "1\n"); |
| 897 | return snprintf(buf, PAGE_SIZE, "0\n"); |
brandon@ifup.org | c80fdbe | 2006-12-04 14:49:58 -0800 | [diff] [blame] | 898 | } |
Adrian Bunk | e5685b9 | 2007-10-24 18:24:42 +0200 | [diff] [blame] | 899 | static DEVICE_ATTR(docked, S_IRUGO, show_docked, NULL); |
brandon@ifup.org | c80fdbe | 2006-12-04 14:49:58 -0800 | [diff] [blame] | 900 | |
| 901 | /* |
Kristen Carlson Accardi | a0cd35f | 2007-05-09 15:08:15 -0700 | [diff] [blame] | 902 | * show_flags - read method for flags file in sysfs |
| 903 | */ |
| 904 | static ssize_t show_flags(struct device *dev, |
| 905 | struct device_attribute *attr, char *buf) |
| 906 | { |
Alex Chiang | fe06fba | 2009-10-19 15:14:45 -0600 | [diff] [blame] | 907 | struct dock_station *dock_station = dev->platform_data; |
Kristen Carlson Accardi | a0cd35f | 2007-05-09 15:08:15 -0700 | [diff] [blame] | 908 | return snprintf(buf, PAGE_SIZE, "%d\n", dock_station->flags); |
| 909 | |
| 910 | } |
Adrian Bunk | e5685b9 | 2007-10-24 18:24:42 +0200 | [diff] [blame] | 911 | static DEVICE_ATTR(flags, S_IRUGO, show_flags, NULL); |
Kristen Carlson Accardi | a0cd35f | 2007-05-09 15:08:15 -0700 | [diff] [blame] | 912 | |
| 913 | /* |
brandon@ifup.org | c80fdbe | 2006-12-04 14:49:58 -0800 | [diff] [blame] | 914 | * write_undock - write method for "undock" file in sysfs |
| 915 | */ |
| 916 | static ssize_t write_undock(struct device *dev, struct device_attribute *attr, |
| 917 | const char *buf, size_t count) |
| 918 | { |
| 919 | int ret; |
Alex Chiang | fe06fba | 2009-10-19 15:14:45 -0600 | [diff] [blame] | 920 | struct dock_station *dock_station = dev->platform_data; |
brandon@ifup.org | c80fdbe | 2006-12-04 14:49:58 -0800 | [diff] [blame] | 921 | |
| 922 | if (!count) |
| 923 | return -EINVAL; |
| 924 | |
Rafael J. Wysocki | 8112006 | 2013-06-16 00:38:30 +0200 | [diff] [blame] | 925 | acpi_scan_lock_acquire(); |
Holger Macht | 9171f83 | 2008-03-12 01:07:27 +0100 | [diff] [blame] | 926 | begin_undock(dock_station); |
brandon@ifup.org | c80fdbe | 2006-12-04 14:49:58 -0800 | [diff] [blame] | 927 | ret = handle_eject_request(dock_station, ACPI_NOTIFY_EJECT_REQUEST); |
Rafael J. Wysocki | 8112006 | 2013-06-16 00:38:30 +0200 | [diff] [blame] | 928 | acpi_scan_lock_release(); |
brandon@ifup.org | c80fdbe | 2006-12-04 14:49:58 -0800 | [diff] [blame] | 929 | return ret ? ret: count; |
| 930 | } |
Adrian Bunk | e5685b9 | 2007-10-24 18:24:42 +0200 | [diff] [blame] | 931 | static DEVICE_ATTR(undock, S_IWUSR, NULL, write_undock); |
brandon@ifup.org | c80fdbe | 2006-12-04 14:49:58 -0800 | [diff] [blame] | 932 | |
Ilya A. Volynets-Evenbakh | ac122bb | 2007-02-19 15:19:31 -0800 | [diff] [blame] | 933 | /* |
| 934 | * show_dock_uid - read method for "uid" file in sysfs |
| 935 | */ |
| 936 | static ssize_t show_dock_uid(struct device *dev, |
| 937 | struct device_attribute *attr, char *buf) |
| 938 | { |
Matthew Wilcox | 27663c5 | 2008-10-10 02:22:59 -0400 | [diff] [blame] | 939 | unsigned long long lbuf; |
Alex Chiang | fe06fba | 2009-10-19 15:14:45 -0600 | [diff] [blame] | 940 | struct dock_station *dock_station = dev->platform_data; |
Kristen Carlson Accardi | 38ff4ff | 2007-05-09 15:04:24 -0700 | [diff] [blame] | 941 | acpi_status status = acpi_evaluate_integer(dock_station->handle, |
| 942 | "_UID", NULL, &lbuf); |
| 943 | if (ACPI_FAILURE(status)) |
Ilya A. Volynets-Evenbakh | ac122bb | 2007-02-19 15:19:31 -0800 | [diff] [blame] | 944 | return 0; |
Kristen Carlson Accardi | 38ff4ff | 2007-05-09 15:04:24 -0700 | [diff] [blame] | 945 | |
Matthew Wilcox | 27663c5 | 2008-10-10 02:22:59 -0400 | [diff] [blame] | 946 | return snprintf(buf, PAGE_SIZE, "%llx\n", lbuf); |
Ilya A. Volynets-Evenbakh | ac122bb | 2007-02-19 15:19:31 -0800 | [diff] [blame] | 947 | } |
Adrian Bunk | e5685b9 | 2007-10-24 18:24:42 +0200 | [diff] [blame] | 948 | static DEVICE_ATTR(uid, S_IRUGO, show_dock_uid, NULL); |
Ilya A. Volynets-Evenbakh | ac122bb | 2007-02-19 15:19:31 -0800 | [diff] [blame] | 949 | |
Shaohua Li | 8652b00 | 2008-08-28 10:07:45 +0800 | [diff] [blame] | 950 | static ssize_t show_dock_type(struct device *dev, |
| 951 | struct device_attribute *attr, char *buf) |
| 952 | { |
Alex Chiang | fe06fba | 2009-10-19 15:14:45 -0600 | [diff] [blame] | 953 | struct dock_station *dock_station = dev->platform_data; |
Shaohua Li | 8652b00 | 2008-08-28 10:07:45 +0800 | [diff] [blame] | 954 | char *type; |
| 955 | |
| 956 | if (dock_station->flags & DOCK_IS_DOCK) |
| 957 | type = "dock_station"; |
| 958 | else if (dock_station->flags & DOCK_IS_ATA) |
| 959 | type = "ata_bay"; |
| 960 | else if (dock_station->flags & DOCK_IS_BAT) |
| 961 | type = "battery_bay"; |
| 962 | else |
| 963 | type = "unknown"; |
| 964 | |
| 965 | return snprintf(buf, PAGE_SIZE, "%s\n", type); |
| 966 | } |
| 967 | static DEVICE_ATTR(type, S_IRUGO, show_dock_type, NULL); |
| 968 | |
Alex Chiang | 5f46c2f | 2009-10-19 15:14:24 -0600 | [diff] [blame] | 969 | static struct attribute *dock_attributes[] = { |
| 970 | &dev_attr_docked.attr, |
| 971 | &dev_attr_flags.attr, |
| 972 | &dev_attr_undock.attr, |
| 973 | &dev_attr_uid.attr, |
| 974 | &dev_attr_type.attr, |
| 975 | NULL |
| 976 | }; |
| 977 | |
| 978 | static struct attribute_group dock_attribute_group = { |
| 979 | .attrs = dock_attributes |
| 980 | }; |
| 981 | |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 982 | /** |
| 983 | * dock_add - add a new dock station |
| 984 | * @handle: the dock station handle |
| 985 | * |
| 986 | * allocated and initialize a new dock station device. Find all devices |
| 987 | * that are on the dock station, and register for dock event notifications. |
| 988 | */ |
Uwe Kleine-König | d38a5ed | 2010-10-19 09:13:39 +0200 | [diff] [blame] | 989 | static int __init dock_add(acpi_handle handle) |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 990 | { |
Alex Chiang | fe06fba | 2009-10-19 15:14:45 -0600 | [diff] [blame] | 991 | int ret, id; |
| 992 | struct dock_station ds, *dock_station; |
Alex Chiang | 747479a | 2009-10-19 15:14:50 -0600 | [diff] [blame] | 993 | struct platform_device *dd; |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 994 | |
Alex Chiang | fe06fba | 2009-10-19 15:14:45 -0600 | [diff] [blame] | 995 | id = dock_station_count; |
Alex Chiang | 49c6fb2 | 2010-02-01 10:35:18 -0700 | [diff] [blame] | 996 | memset(&ds, 0, sizeof(ds)); |
Alex Chiang | 747479a | 2009-10-19 15:14:50 -0600 | [diff] [blame] | 997 | dd = platform_device_register_data(NULL, "dock", id, &ds, sizeof(ds)); |
| 998 | if (IS_ERR(dd)) |
| 999 | return PTR_ERR(dd); |
Alex Chiang | 9751cb7 | 2009-10-19 15:14:40 -0600 | [diff] [blame] | 1000 | |
Alex Chiang | 747479a | 2009-10-19 15:14:50 -0600 | [diff] [blame] | 1001 | dock_station = dd->dev.platform_data; |
| 1002 | |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 1003 | dock_station->handle = handle; |
Alex Chiang | 747479a | 2009-10-19 15:14:50 -0600 | [diff] [blame] | 1004 | dock_station->dock_device = dd; |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 1005 | dock_station->last_dock_time = jiffies - HZ; |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 1006 | |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 1007 | mutex_init(&dock_station->hp_lock); |
Alex Chiang | 747479a | 2009-10-19 15:14:50 -0600 | [diff] [blame] | 1008 | spin_lock_init(&dock_station->dd_lock); |
| 1009 | INIT_LIST_HEAD(&dock_station->sibling); |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 1010 | ATOMIC_INIT_NOTIFIER_HEAD(&dock_notifier_list); |
Alex Chiang | 747479a | 2009-10-19 15:14:50 -0600 | [diff] [blame] | 1011 | INIT_LIST_HEAD(&dock_station->dependent_devices); |
Kristen Carlson Accardi | a0cd35f | 2007-05-09 15:08:15 -0700 | [diff] [blame] | 1012 | |
Kristen Carlson Accardi | 9ef2a9a | 2007-05-09 15:09:12 -0700 | [diff] [blame] | 1013 | /* we want the dock device to send uevents */ |
Alex Chiang | 747479a | 2009-10-19 15:14:50 -0600 | [diff] [blame] | 1014 | dev_set_uevent_suppress(&dd->dev, 0); |
Kristen Carlson Accardi | 9ef2a9a | 2007-05-09 15:09:12 -0700 | [diff] [blame] | 1015 | |
Shaohua Li | db350b0 | 2008-08-28 10:03:58 +0800 | [diff] [blame] | 1016 | if (is_dock(handle)) |
| 1017 | dock_station->flags |= DOCK_IS_DOCK; |
| 1018 | if (is_ata(handle)) |
| 1019 | dock_station->flags |= DOCK_IS_ATA; |
| 1020 | if (is_battery(handle)) |
| 1021 | dock_station->flags |= DOCK_IS_BAT; |
| 1022 | |
Alex Chiang | 747479a | 2009-10-19 15:14:50 -0600 | [diff] [blame] | 1023 | ret = sysfs_create_group(&dd->dev.kobj, &dock_attribute_group); |
Shaohua Li | 8652b00 | 2008-08-28 10:07:45 +0800 | [diff] [blame] | 1024 | if (ret) |
Alex Chiang | 5f46c2f | 2009-10-19 15:14:24 -0600 | [diff] [blame] | 1025 | goto err_unregister; |
Kristen Carlson Accardi | 671adbe | 2006-12-04 14:49:43 -0800 | [diff] [blame] | 1026 | |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 1027 | /* Find dependent devices */ |
| 1028 | acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, |
Lin Ming | 2263576 | 2009-11-13 10:06:08 +0800 | [diff] [blame] | 1029 | ACPI_UINT32_MAX, find_dock_devices, NULL, |
| 1030 | dock_station, NULL); |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 1031 | |
| 1032 | /* add the dock station as a device dependent on itself */ |
Alex Chiang | f69cfdd | 2009-10-19 15:14:29 -0600 | [diff] [blame] | 1033 | ret = add_dock_dependent_device(dock_station, handle); |
| 1034 | if (ret) |
Alex Chiang | 5f46c2f | 2009-10-19 15:14:24 -0600 | [diff] [blame] | 1035 | goto err_rmgroup; |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 1036 | |
Shaohua Li | db350b0 | 2008-08-28 10:03:58 +0800 | [diff] [blame] | 1037 | dock_station_count++; |
Alex Chiang | 50d716e | 2009-10-01 11:59:23 -0600 | [diff] [blame] | 1038 | list_add(&dock_station->sibling, &dock_stations); |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 1039 | return 0; |
| 1040 | |
Alex Chiang | 5f46c2f | 2009-10-19 15:14:24 -0600 | [diff] [blame] | 1041 | err_rmgroup: |
Alex Chiang | 747479a | 2009-10-19 15:14:50 -0600 | [diff] [blame] | 1042 | sysfs_remove_group(&dd->dev.kobj, &dock_attribute_group); |
Alex Chiang | 5f46c2f | 2009-10-19 15:14:24 -0600 | [diff] [blame] | 1043 | err_unregister: |
Alex Chiang | 747479a | 2009-10-19 15:14:50 -0600 | [diff] [blame] | 1044 | platform_device_unregister(dd); |
Toshi Kani | cd73018 | 2012-11-20 23:42:30 +0000 | [diff] [blame] | 1045 | acpi_handle_err(handle, "%s encountered error %d\n", __func__, ret); |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 1046 | return ret; |
| 1047 | } |
| 1048 | |
| 1049 | /** |
Toshi Kani | 8ab0ab2 | 2012-10-23 01:30:26 +0200 | [diff] [blame] | 1050 | * find_dock_and_bay - look for dock stations and bays |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 1051 | * @handle: acpi handle of a device |
| 1052 | * @lvl: unused |
Toshi Kani | 8ab0ab2 | 2012-10-23 01:30:26 +0200 | [diff] [blame] | 1053 | * @context: unused |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 1054 | * @rv: unused |
| 1055 | * |
Toshi Kani | 8ab0ab2 | 2012-10-23 01:30:26 +0200 | [diff] [blame] | 1056 | * This is called by acpi_walk_namespace to look for dock stations and bays. |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 1057 | */ |
Uwe Kleine-König | d38a5ed | 2010-10-19 09:13:39 +0200 | [diff] [blame] | 1058 | static __init acpi_status |
Toshi Kani | 8ab0ab2 | 2012-10-23 01:30:26 +0200 | [diff] [blame] | 1059 | find_dock_and_bay(acpi_handle handle, u32 lvl, void *context, void **rv) |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 1060 | { |
Toshi Kani | 8ab0ab2 | 2012-10-23 01:30:26 +0200 | [diff] [blame] | 1061 | if (is_dock(handle) || is_ejectable_bay(handle)) |
Zhang Rui | 1ee4d61 | 2010-03-22 15:46:49 +0800 | [diff] [blame] | 1062 | dock_add(handle); |
Alex Chiang | 747479a | 2009-10-19 15:14:50 -0600 | [diff] [blame] | 1063 | |
Zhang Rui | 1ee4d61 | 2010-03-22 15:46:49 +0800 | [diff] [blame] | 1064 | return AE_OK; |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 1065 | } |
| 1066 | |
Rafael J. Wysocki | 2ce65fe | 2013-07-04 13:25:04 +0200 | [diff] [blame] | 1067 | void __init acpi_dock_init(void) |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 1068 | { |
Len Brown | 816c2ed | 2008-06-24 22:57:12 -0400 | [diff] [blame] | 1069 | if (acpi_disabled) |
Rafael J. Wysocki | 2ce65fe | 2013-07-04 13:25:04 +0200 | [diff] [blame] | 1070 | return; |
Len Brown | 816c2ed | 2008-06-24 22:57:12 -0400 | [diff] [blame] | 1071 | |
Toshi Kani | 8ab0ab2 | 2012-10-23 01:30:26 +0200 | [diff] [blame] | 1072 | /* look for dock stations and bays */ |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 1073 | acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, |
Toshi Kani | 8ab0ab2 | 2012-10-23 01:30:26 +0200 | [diff] [blame] | 1074 | ACPI_UINT32_MAX, find_dock_and_bay, NULL, NULL, NULL); |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 1075 | |
Shaohua Li | db350b0 | 2008-08-28 10:03:58 +0800 | [diff] [blame] | 1076 | if (!dock_station_count) { |
Toshi Kani | cd73018 | 2012-11-20 23:42:30 +0000 | [diff] [blame] | 1077 | pr_info(PREFIX "No dock devices found.\n"); |
Rafael J. Wysocki | 2ce65fe | 2013-07-04 13:25:04 +0200 | [diff] [blame] | 1078 | return; |
Shaohua Li | db350b0 | 2008-08-28 10:03:58 +0800 | [diff] [blame] | 1079 | } |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 1080 | |
Shaohua Li | 6bd00a6 | 2008-08-28 10:04:29 +0800 | [diff] [blame] | 1081 | register_acpi_bus_notifier(&dock_acpi_notifier); |
Toshi Kani | cd73018 | 2012-11-20 23:42:30 +0000 | [diff] [blame] | 1082 | pr_info(PREFIX "%s: %d docks/bays found\n", |
Shaohua Li | db350b0 | 2008-08-28 10:03:58 +0800 | [diff] [blame] | 1083 | ACPI_DOCK_DRIVER_DESCRIPTION, dock_station_count); |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 1084 | } |