1c8f7a62cSLen Brown /* 2c8f7a62cSLen Brown * dock.c - ACPI dock station driver 3c8f7a62cSLen Brown * 4c8f7a62cSLen Brown * Copyright (C) 2006 Kristen Carlson Accardi <kristen.c.accardi@intel.com> 5c8f7a62cSLen Brown * 6c8f7a62cSLen Brown * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 7c8f7a62cSLen Brown * 8c8f7a62cSLen Brown * This program is free software; you can redistribute it and/or modify 9c8f7a62cSLen Brown * it under the terms of the GNU General Public License as published by 10c8f7a62cSLen Brown * the Free Software Foundation; either version 2 of the License, or (at 11c8f7a62cSLen Brown * your option) any later version. 12c8f7a62cSLen Brown * 13c8f7a62cSLen Brown * This program is distributed in the hope that it will be useful, but 14c8f7a62cSLen Brown * WITHOUT ANY WARRANTY; without even the implied warranty of 15c8f7a62cSLen Brown * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 16c8f7a62cSLen Brown * General Public License for more details. 17c8f7a62cSLen Brown * 18c8f7a62cSLen Brown * You should have received a copy of the GNU General Public License along 19c8f7a62cSLen Brown * with this program; if not, write to the Free Software Foundation, Inc., 20c8f7a62cSLen Brown * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. 21c8f7a62cSLen Brown * 22c8f7a62cSLen Brown * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 23c8f7a62cSLen Brown */ 24c8f7a62cSLen Brown 25c8f7a62cSLen Brown #include <linux/kernel.h> 26c8f7a62cSLen Brown #include <linux/module.h> 27c8f7a62cSLen Brown #include <linux/init.h> 28c8f7a62cSLen Brown #include <linux/types.h> 29c8f7a62cSLen Brown #include <linux/notifier.h> 30671adbecSKristen Carlson Accardi #include <linux/platform_device.h> 31914e2637SAl Viro #include <linux/jiffies.h> 3262a6d7fdSRandy Dunlap #include <linux/stddef.h> 33c8f7a62cSLen Brown #include <acpi/acpi_bus.h> 34c8f7a62cSLen Brown #include <acpi/acpi_drivers.h> 35c8f7a62cSLen Brown 367cda93e0SLen Brown #define ACPI_DOCK_DRIVER_DESCRIPTION "ACPI Dock Station Driver" 37c8f7a62cSLen Brown 38f52fd66dSLen Brown ACPI_MODULE_NAME("dock"); 39c8f7a62cSLen Brown MODULE_AUTHOR("Kristen Carlson Accardi"); 407cda93e0SLen Brown MODULE_DESCRIPTION(ACPI_DOCK_DRIVER_DESCRIPTION); 41c8f7a62cSLen Brown MODULE_LICENSE("GPL"); 42c8f7a62cSLen Brown 43a0cd35fdSKristen Carlson Accardi static int immediate_undock = 1; 44a0cd35fdSKristen Carlson Accardi module_param(immediate_undock, bool, 0644); 45a0cd35fdSKristen Carlson Accardi MODULE_PARM_DESC(immediate_undock, "1 (default) will cause the driver to " 46a0cd35fdSKristen Carlson Accardi "undock immediately when the undock button is pressed, 0 will cause" 47a0cd35fdSKristen Carlson Accardi " the driver to wait for userspace to write the undock sysfs file " 48a0cd35fdSKristen Carlson Accardi " before undocking"); 49a0cd35fdSKristen Carlson Accardi 50c8f7a62cSLen Brown static struct atomic_notifier_head dock_notifier_list; 51671adbecSKristen Carlson Accardi static char dock_device_name[] = "dock"; 52c8f7a62cSLen Brown 53a340af14SFrank Seidel static const struct acpi_device_id dock_device_ids[] = { 54a340af14SFrank Seidel {"LNXDOCK", 0}, 55a340af14SFrank Seidel {"", 0}, 56a340af14SFrank Seidel }; 57a340af14SFrank Seidel MODULE_DEVICE_TABLE(acpi, dock_device_ids); 58a340af14SFrank Seidel 59c8f7a62cSLen Brown struct dock_station { 60c8f7a62cSLen Brown acpi_handle handle; 61c8f7a62cSLen Brown unsigned long last_dock_time; 62c8f7a62cSLen Brown u32 flags; 63c8f7a62cSLen Brown spinlock_t dd_lock; 648b0dc866SKristen Carlson Accardi struct mutex hp_lock; 65c8f7a62cSLen Brown struct list_head dependent_devices; 66c8f7a62cSLen Brown struct list_head hotplug_devices; 67db350b08SShaohua Li 68db350b08SShaohua Li struct list_head sibiling; 69db350b08SShaohua Li struct platform_device *dock_device; 70c8f7a62cSLen Brown }; 71db350b08SShaohua Li static LIST_HEAD(dock_stations); 72db350b08SShaohua Li static int dock_station_count; 73c8f7a62cSLen Brown 74c8f7a62cSLen Brown struct dock_dependent_device { 75c8f7a62cSLen Brown struct list_head list; 76c8f7a62cSLen Brown struct list_head hotplug_list; 77c8f7a62cSLen Brown acpi_handle handle; 781253f7aaSShaohua Li struct acpi_dock_ops *ops; 79c8f7a62cSLen Brown void *context; 80c8f7a62cSLen Brown }; 81c8f7a62cSLen Brown 82c8f7a62cSLen Brown #define DOCK_DOCKING 0x00000001 83a0cd35fdSKristen Carlson Accardi #define DOCK_UNDOCKING 0x00000002 84db350b08SShaohua Li #define DOCK_IS_DOCK 0x00000010 85db350b08SShaohua Li #define DOCK_IS_ATA 0x00000020 86db350b08SShaohua Li #define DOCK_IS_BAT 0x00000040 875669021eSKristen Carlson Accardi #define DOCK_EVENT 3 885669021eSKristen Carlson Accardi #define UNDOCK_EVENT 2 89c8f7a62cSLen Brown 90c8f7a62cSLen Brown /***************************************************************************** 91c8f7a62cSLen Brown * Dock Dependent device functions * 92c8f7a62cSLen Brown *****************************************************************************/ 93c8f7a62cSLen Brown /** 94c8f7a62cSLen Brown * alloc_dock_dependent_device - allocate and init a dependent device 95c8f7a62cSLen Brown * @handle: the acpi_handle of the dependent device 96c8f7a62cSLen Brown * 97c8f7a62cSLen Brown * Allocate memory for a dependent device structure for a device referenced 98c8f7a62cSLen Brown * by the acpi handle 99c8f7a62cSLen Brown */ 100c8f7a62cSLen Brown static struct dock_dependent_device * 101c8f7a62cSLen Brown alloc_dock_dependent_device(acpi_handle handle) 102c8f7a62cSLen Brown { 103c8f7a62cSLen Brown struct dock_dependent_device *dd; 104c8f7a62cSLen Brown 105c8f7a62cSLen Brown dd = kzalloc(sizeof(*dd), GFP_KERNEL); 106c8f7a62cSLen Brown if (dd) { 107c8f7a62cSLen Brown dd->handle = handle; 108c8f7a62cSLen Brown INIT_LIST_HEAD(&dd->list); 109c8f7a62cSLen Brown INIT_LIST_HEAD(&dd->hotplug_list); 110c8f7a62cSLen Brown } 111c8f7a62cSLen Brown return dd; 112c8f7a62cSLen Brown } 113c8f7a62cSLen Brown 114c8f7a62cSLen Brown /** 115c8f7a62cSLen Brown * add_dock_dependent_device - associate a device with the dock station 116c8f7a62cSLen Brown * @ds: The dock station 117c8f7a62cSLen Brown * @dd: The dependent device 118c8f7a62cSLen Brown * 119c8f7a62cSLen Brown * Add the dependent device to the dock's dependent device list. 120c8f7a62cSLen Brown */ 121c8f7a62cSLen Brown static void 122c8f7a62cSLen Brown add_dock_dependent_device(struct dock_station *ds, 123c8f7a62cSLen Brown struct dock_dependent_device *dd) 124c8f7a62cSLen Brown { 125c8f7a62cSLen Brown spin_lock(&ds->dd_lock); 126c8f7a62cSLen Brown list_add_tail(&dd->list, &ds->dependent_devices); 127c8f7a62cSLen Brown spin_unlock(&ds->dd_lock); 128c8f7a62cSLen Brown } 129c8f7a62cSLen Brown 130c8f7a62cSLen Brown /** 131c8f7a62cSLen Brown * dock_add_hotplug_device - associate a hotplug handler with the dock station 132c8f7a62cSLen Brown * @ds: The dock station 133c8f7a62cSLen Brown * @dd: The dependent device struct 134c8f7a62cSLen Brown * 135c8f7a62cSLen Brown * Add the dependent device to the dock's hotplug device list 136c8f7a62cSLen Brown */ 137c8f7a62cSLen Brown static void 138c8f7a62cSLen Brown dock_add_hotplug_device(struct dock_station *ds, 139c8f7a62cSLen Brown struct dock_dependent_device *dd) 140c8f7a62cSLen Brown { 1418b0dc866SKristen Carlson Accardi mutex_lock(&ds->hp_lock); 142c8f7a62cSLen Brown list_add_tail(&dd->hotplug_list, &ds->hotplug_devices); 1438b0dc866SKristen Carlson Accardi mutex_unlock(&ds->hp_lock); 144c8f7a62cSLen Brown } 145c8f7a62cSLen Brown 146c8f7a62cSLen Brown /** 147c8f7a62cSLen Brown * dock_del_hotplug_device - remove a hotplug handler from the dock station 148c8f7a62cSLen Brown * @ds: The dock station 149c8f7a62cSLen Brown * @dd: the dependent device struct 150c8f7a62cSLen Brown * 151c8f7a62cSLen Brown * Delete the dependent device from the dock's hotplug device list 152c8f7a62cSLen Brown */ 153c8f7a62cSLen Brown static void 154c8f7a62cSLen Brown dock_del_hotplug_device(struct dock_station *ds, 155c8f7a62cSLen Brown struct dock_dependent_device *dd) 156c8f7a62cSLen Brown { 1578b0dc866SKristen Carlson Accardi mutex_lock(&ds->hp_lock); 158c8f7a62cSLen Brown list_del(&dd->hotplug_list); 1598b0dc866SKristen Carlson Accardi mutex_unlock(&ds->hp_lock); 160c8f7a62cSLen Brown } 161c8f7a62cSLen Brown 162c8f7a62cSLen Brown /** 163c8f7a62cSLen Brown * find_dock_dependent_device - get a device dependent on this dock 164c8f7a62cSLen Brown * @ds: the dock station 165c8f7a62cSLen Brown * @handle: the acpi_handle of the device we want 166c8f7a62cSLen Brown * 167c8f7a62cSLen Brown * iterate over the dependent device list for this dock. If the 168c8f7a62cSLen Brown * dependent device matches the handle, return. 169c8f7a62cSLen Brown */ 170c8f7a62cSLen Brown static struct dock_dependent_device * 171c8f7a62cSLen Brown find_dock_dependent_device(struct dock_station *ds, acpi_handle handle) 172c8f7a62cSLen Brown { 173c8f7a62cSLen Brown struct dock_dependent_device *dd; 174c8f7a62cSLen Brown 175c8f7a62cSLen Brown spin_lock(&ds->dd_lock); 176c8f7a62cSLen Brown list_for_each_entry(dd, &ds->dependent_devices, list) { 177c8f7a62cSLen Brown if (handle == dd->handle) { 178c8f7a62cSLen Brown spin_unlock(&ds->dd_lock); 179c8f7a62cSLen Brown return dd; 180c8f7a62cSLen Brown } 181c8f7a62cSLen Brown } 182c8f7a62cSLen Brown spin_unlock(&ds->dd_lock); 183c8f7a62cSLen Brown return NULL; 184c8f7a62cSLen Brown } 185c8f7a62cSLen Brown 186c8f7a62cSLen Brown /***************************************************************************** 187c8f7a62cSLen Brown * Dock functions * 188c8f7a62cSLen Brown *****************************************************************************/ 189c8f7a62cSLen Brown /** 190c8f7a62cSLen Brown * is_dock - see if a device is a dock station 191c8f7a62cSLen Brown * @handle: acpi handle of the device 192c8f7a62cSLen Brown * 193c8f7a62cSLen Brown * If an acpi object has a _DCK method, then it is by definition a dock 194c8f7a62cSLen Brown * station, so return true. 195c8f7a62cSLen Brown */ 196c8f7a62cSLen Brown static int is_dock(acpi_handle handle) 197c8f7a62cSLen Brown { 198c8f7a62cSLen Brown acpi_status status; 199c8f7a62cSLen Brown acpi_handle tmp; 200c8f7a62cSLen Brown 201c8f7a62cSLen Brown status = acpi_get_handle(handle, "_DCK", &tmp); 202c8f7a62cSLen Brown if (ACPI_FAILURE(status)) 203c8f7a62cSLen Brown return 0; 204c8f7a62cSLen Brown return 1; 205c8f7a62cSLen Brown } 206c8f7a62cSLen Brown 207db350b08SShaohua Li static int is_ejectable(acpi_handle handle) 208db350b08SShaohua Li { 209db350b08SShaohua Li acpi_status status; 210db350b08SShaohua Li acpi_handle tmp; 211db350b08SShaohua Li 212db350b08SShaohua Li status = acpi_get_handle(handle, "_EJ0", &tmp); 213db350b08SShaohua Li if (ACPI_FAILURE(status)) 214db350b08SShaohua Li return 0; 215db350b08SShaohua Li return 1; 216db350b08SShaohua Li } 217db350b08SShaohua Li 218db350b08SShaohua Li static int is_ata(acpi_handle handle) 219db350b08SShaohua Li { 220db350b08SShaohua Li acpi_handle tmp; 221db350b08SShaohua Li 222db350b08SShaohua Li if ((ACPI_SUCCESS(acpi_get_handle(handle, "_GTF", &tmp))) || 223db350b08SShaohua Li (ACPI_SUCCESS(acpi_get_handle(handle, "_GTM", &tmp))) || 224db350b08SShaohua Li (ACPI_SUCCESS(acpi_get_handle(handle, "_STM", &tmp))) || 225db350b08SShaohua Li (ACPI_SUCCESS(acpi_get_handle(handle, "_SDD", &tmp)))) 226db350b08SShaohua Li return 1; 227db350b08SShaohua Li 228db350b08SShaohua Li return 0; 229db350b08SShaohua Li } 230db350b08SShaohua Li 231db350b08SShaohua Li static int is_battery(acpi_handle handle) 232db350b08SShaohua Li { 233db350b08SShaohua Li struct acpi_device_info *info; 234db350b08SShaohua Li struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; 235db350b08SShaohua Li int ret = 1; 236db350b08SShaohua Li 237db350b08SShaohua Li if (!ACPI_SUCCESS(acpi_get_object_info(handle, &buffer))) 238db350b08SShaohua Li return 0; 239db350b08SShaohua Li info = buffer.pointer; 240db350b08SShaohua Li if (!(info->valid & ACPI_VALID_HID)) 241db350b08SShaohua Li ret = 0; 242db350b08SShaohua Li else 243db350b08SShaohua Li ret = !strcmp("PNP0C0A", info->hardware_id.value); 244db350b08SShaohua Li 245db350b08SShaohua Li kfree(buffer.pointer); 246db350b08SShaohua Li return ret; 247db350b08SShaohua Li } 248db350b08SShaohua Li 249db350b08SShaohua Li static int is_ejectable_bay(acpi_handle handle) 250db350b08SShaohua Li { 251db350b08SShaohua Li acpi_handle phandle; 252db350b08SShaohua Li if (!is_ejectable(handle)) 253db350b08SShaohua Li return 0; 254db350b08SShaohua Li if (is_battery(handle) || is_ata(handle)) 255db350b08SShaohua Li return 1; 256db350b08SShaohua Li if (!acpi_get_parent(handle, &phandle) && is_ata(phandle)) 257db350b08SShaohua Li return 1; 258db350b08SShaohua Li return 0; 259db350b08SShaohua Li } 260db350b08SShaohua Li 261c8f7a62cSLen Brown /** 262c8f7a62cSLen Brown * is_dock_device - see if a device is on a dock station 263c8f7a62cSLen Brown * @handle: acpi handle of the device 264c8f7a62cSLen Brown * 265c8f7a62cSLen Brown * If this device is either the dock station itself, 266c8f7a62cSLen Brown * or is a device dependent on the dock station, then it 267c8f7a62cSLen Brown * is a dock device 268c8f7a62cSLen Brown */ 269c8f7a62cSLen Brown int is_dock_device(acpi_handle handle) 270c8f7a62cSLen Brown { 271db350b08SShaohua Li struct dock_station *dock_station; 272db350b08SShaohua Li 273db350b08SShaohua Li if (!dock_station_count) 274c8f7a62cSLen Brown return 0; 275c8f7a62cSLen Brown 276db350b08SShaohua Li if (is_dock(handle)) 277c8f7a62cSLen Brown return 1; 278db350b08SShaohua Li list_for_each_entry(dock_station, &dock_stations, sibiling) { 279db350b08SShaohua Li if (find_dock_dependent_device(dock_station, handle)) 280db350b08SShaohua Li return 1; 281db350b08SShaohua Li } 282c8f7a62cSLen Brown 283c8f7a62cSLen Brown return 0; 284c8f7a62cSLen Brown } 285c8f7a62cSLen Brown 286c8f7a62cSLen Brown EXPORT_SYMBOL_GPL(is_dock_device); 287c8f7a62cSLen Brown 288c8f7a62cSLen Brown /** 289c8f7a62cSLen Brown * dock_present - see if the dock station is present. 290c8f7a62cSLen Brown * @ds: the dock station 291c8f7a62cSLen Brown * 292c8f7a62cSLen Brown * execute the _STA method. note that present does not 293c8f7a62cSLen Brown * imply that we are docked. 294c8f7a62cSLen Brown */ 295c8f7a62cSLen Brown static int dock_present(struct dock_station *ds) 296c8f7a62cSLen Brown { 297c8f7a62cSLen Brown unsigned long sta; 298c8f7a62cSLen Brown acpi_status status; 299c8f7a62cSLen Brown 300c8f7a62cSLen Brown if (ds) { 301c8f7a62cSLen Brown status = acpi_evaluate_integer(ds->handle, "_STA", NULL, &sta); 302c8f7a62cSLen Brown if (ACPI_SUCCESS(status) && sta) 303c8f7a62cSLen Brown return 1; 304c8f7a62cSLen Brown } 305c8f7a62cSLen Brown return 0; 306c8f7a62cSLen Brown } 307c8f7a62cSLen Brown 308c8f7a62cSLen Brown 309c8f7a62cSLen Brown 310c8f7a62cSLen Brown /** 311c8f7a62cSLen Brown * dock_create_acpi_device - add new devices to acpi 312c8f7a62cSLen Brown * @handle - handle of the device to add 313c8f7a62cSLen Brown * 314c8f7a62cSLen Brown * This function will create a new acpi_device for the given 315c8f7a62cSLen Brown * handle if one does not exist already. This should cause 316c8f7a62cSLen Brown * acpi to scan for drivers for the given devices, and call 317c8f7a62cSLen Brown * matching driver's add routine. 318c8f7a62cSLen Brown * 319c8f7a62cSLen Brown * Returns a pointer to the acpi_device corresponding to the handle. 320c8f7a62cSLen Brown */ 321c8f7a62cSLen Brown static struct acpi_device * dock_create_acpi_device(acpi_handle handle) 322c8f7a62cSLen Brown { 323c8f7a62cSLen Brown struct acpi_device *device = NULL; 324c8f7a62cSLen Brown struct acpi_device *parent_device; 325c8f7a62cSLen Brown acpi_handle parent; 326c8f7a62cSLen Brown int ret; 327c8f7a62cSLen Brown 328c8f7a62cSLen Brown if (acpi_bus_get_device(handle, &device)) { 329c8f7a62cSLen Brown /* 330c8f7a62cSLen Brown * no device created for this object, 331c8f7a62cSLen Brown * so we should create one. 332c8f7a62cSLen Brown */ 333c8f7a62cSLen Brown acpi_get_parent(handle, &parent); 334c8f7a62cSLen Brown if (acpi_bus_get_device(parent, &parent_device)) 335c8f7a62cSLen Brown parent_device = NULL; 336c8f7a62cSLen Brown 337c8f7a62cSLen Brown ret = acpi_bus_add(&device, parent_device, handle, 338c8f7a62cSLen Brown ACPI_BUS_TYPE_DEVICE); 339c8f7a62cSLen Brown if (ret) { 340c8f7a62cSLen Brown pr_debug("error adding bus, %x\n", 341c8f7a62cSLen Brown -ret); 342c8f7a62cSLen Brown return NULL; 343c8f7a62cSLen Brown } 344c8f7a62cSLen Brown } 345c8f7a62cSLen Brown return device; 346c8f7a62cSLen Brown } 347c8f7a62cSLen Brown 348c8f7a62cSLen Brown /** 349c8f7a62cSLen Brown * dock_remove_acpi_device - remove the acpi_device struct from acpi 350c8f7a62cSLen Brown * @handle - the handle of the device to remove 351c8f7a62cSLen Brown * 352c8f7a62cSLen Brown * Tell acpi to remove the acpi_device. This should cause any loaded 353c8f7a62cSLen Brown * driver to have it's remove routine called. 354c8f7a62cSLen Brown */ 355c8f7a62cSLen Brown static void dock_remove_acpi_device(acpi_handle handle) 356c8f7a62cSLen Brown { 357c8f7a62cSLen Brown struct acpi_device *device; 358c8f7a62cSLen Brown int ret; 359c8f7a62cSLen Brown 360c8f7a62cSLen Brown if (!acpi_bus_get_device(handle, &device)) { 361c8f7a62cSLen Brown ret = acpi_bus_trim(device, 1); 362c8f7a62cSLen Brown if (ret) 363c8f7a62cSLen Brown pr_debug("error removing bus, %x\n", -ret); 364c8f7a62cSLen Brown } 365c8f7a62cSLen Brown } 366c8f7a62cSLen Brown 367c8f7a62cSLen Brown 368c8f7a62cSLen Brown /** 369c8f7a62cSLen Brown * hotplug_dock_devices - insert or remove devices on the dock station 370c8f7a62cSLen Brown * @ds: the dock station 371c8f7a62cSLen Brown * @event: either bus check or eject request 372c8f7a62cSLen Brown * 373c8f7a62cSLen Brown * Some devices on the dock station need to have drivers called 374c8f7a62cSLen Brown * to perform hotplug operations after a dock event has occurred. 375c8f7a62cSLen Brown * Traverse the list of dock devices that have registered a 376c8f7a62cSLen Brown * hotplug handler, and call the handler. 377c8f7a62cSLen Brown */ 378c8f7a62cSLen Brown static void hotplug_dock_devices(struct dock_station *ds, u32 event) 379c8f7a62cSLen Brown { 380c8f7a62cSLen Brown struct dock_dependent_device *dd; 381c8f7a62cSLen Brown 3828b0dc866SKristen Carlson Accardi mutex_lock(&ds->hp_lock); 383c8f7a62cSLen Brown 384c8f7a62cSLen Brown /* 385c8f7a62cSLen Brown * First call driver specific hotplug functions 386c8f7a62cSLen Brown */ 387c8f7a62cSLen Brown list_for_each_entry(dd, &ds->hotplug_devices, hotplug_list) { 3881253f7aaSShaohua Li if (dd->ops && dd->ops->handler) 3891253f7aaSShaohua Li dd->ops->handler(dd->handle, event, dd->context); 390c8f7a62cSLen Brown } 391c8f7a62cSLen Brown 392c8f7a62cSLen Brown /* 393c8f7a62cSLen Brown * Now make sure that an acpi_device is created for each 394c8f7a62cSLen Brown * dependent device, or removed if this is an eject request. 395c8f7a62cSLen Brown * This will cause acpi_drivers to be stopped/started if they 396c8f7a62cSLen Brown * exist 397c8f7a62cSLen Brown */ 398c8f7a62cSLen Brown list_for_each_entry(dd, &ds->dependent_devices, list) { 399c8f7a62cSLen Brown if (event == ACPI_NOTIFY_EJECT_REQUEST) 400c8f7a62cSLen Brown dock_remove_acpi_device(dd->handle); 401c8f7a62cSLen Brown else 402c8f7a62cSLen Brown dock_create_acpi_device(dd->handle); 403c8f7a62cSLen Brown } 4048b0dc866SKristen Carlson Accardi mutex_unlock(&ds->hp_lock); 405c8f7a62cSLen Brown } 406c8f7a62cSLen Brown 407c8f7a62cSLen Brown static void dock_event(struct dock_station *ds, u32 event, int num) 408c8f7a62cSLen Brown { 409db350b08SShaohua Li struct device *dev = &ds->dock_device->dev; 41066b56821SHolger Macht char event_string[13]; 41179a8f70bSKristen Carlson Accardi char *envp[] = { event_string, NULL }; 4121253f7aaSShaohua Li struct dock_dependent_device *dd; 41379a8f70bSKristen Carlson Accardi 41479a8f70bSKristen Carlson Accardi if (num == UNDOCK_EVENT) 41566b56821SHolger Macht sprintf(event_string, "EVENT=undock"); 41679a8f70bSKristen Carlson Accardi else 41766b56821SHolger Macht sprintf(event_string, "EVENT=dock"); 41879a8f70bSKristen Carlson Accardi 4195669021eSKristen Carlson Accardi /* 4208ea86e0bSKristen Carlson Accardi * Indicate that the status of the dock station has 4218ea86e0bSKristen Carlson Accardi * changed. 4225669021eSKristen Carlson Accardi */ 4231253f7aaSShaohua Li if (num == DOCK_EVENT) 4241253f7aaSShaohua Li kobject_uevent_env(&dev->kobj, KOBJ_CHANGE, envp); 4251253f7aaSShaohua Li 4261253f7aaSShaohua Li list_for_each_entry(dd, &ds->hotplug_devices, hotplug_list) 4271253f7aaSShaohua Li if (dd->ops && dd->ops->uevent) 4281253f7aaSShaohua Li dd->ops->uevent(dd->handle, event, dd->context); 4291253f7aaSShaohua Li if (num != DOCK_EVENT) 43079a8f70bSKristen Carlson Accardi kobject_uevent_env(&dev->kobj, KOBJ_CHANGE, envp); 431c8f7a62cSLen Brown } 432c8f7a62cSLen Brown 433c8f7a62cSLen Brown /** 434c8f7a62cSLen Brown * eject_dock - respond to a dock eject request 435c8f7a62cSLen Brown * @ds: the dock station 436c8f7a62cSLen Brown * 437c8f7a62cSLen Brown * This is called after _DCK is called, to execute the dock station's 438c8f7a62cSLen Brown * _EJ0 method. 439c8f7a62cSLen Brown */ 440c8f7a62cSLen Brown static void eject_dock(struct dock_station *ds) 441c8f7a62cSLen Brown { 442c8f7a62cSLen Brown struct acpi_object_list arg_list; 443c8f7a62cSLen Brown union acpi_object arg; 444c8f7a62cSLen Brown acpi_status status; 445c8f7a62cSLen Brown acpi_handle tmp; 446c8f7a62cSLen Brown 447c8f7a62cSLen Brown /* all dock devices should have _EJ0, but check anyway */ 448c8f7a62cSLen Brown status = acpi_get_handle(ds->handle, "_EJ0", &tmp); 449c8f7a62cSLen Brown if (ACPI_FAILURE(status)) { 450c8f7a62cSLen Brown pr_debug("No _EJ0 support for dock device\n"); 451c8f7a62cSLen Brown return; 452c8f7a62cSLen Brown } 453c8f7a62cSLen Brown 454c8f7a62cSLen Brown arg_list.count = 1; 455c8f7a62cSLen Brown arg_list.pointer = &arg; 456c8f7a62cSLen Brown arg.type = ACPI_TYPE_INTEGER; 457c8f7a62cSLen Brown arg.integer.value = 1; 458c8f7a62cSLen Brown 459c8f7a62cSLen Brown if (ACPI_FAILURE(acpi_evaluate_object(ds->handle, "_EJ0", 460c8f7a62cSLen Brown &arg_list, NULL))) 461c8f7a62cSLen Brown pr_debug("Failed to evaluate _EJ0!\n"); 462c8f7a62cSLen Brown } 463c8f7a62cSLen Brown 464c8f7a62cSLen Brown /** 465c8f7a62cSLen Brown * handle_dock - handle a dock event 466c8f7a62cSLen Brown * @ds: the dock station 467c8f7a62cSLen Brown * @dock: to dock, or undock - that is the question 468c8f7a62cSLen Brown * 469c8f7a62cSLen Brown * Execute the _DCK method in response to an acpi event 470c8f7a62cSLen Brown */ 471c8f7a62cSLen Brown static void handle_dock(struct dock_station *ds, int dock) 472c8f7a62cSLen Brown { 473c8f7a62cSLen Brown acpi_status status; 474c8f7a62cSLen Brown struct acpi_object_list arg_list; 475c8f7a62cSLen Brown union acpi_object arg; 476c8f7a62cSLen Brown struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 477c8f7a62cSLen Brown struct acpi_buffer name_buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 478c8f7a62cSLen Brown 479c8f7a62cSLen Brown acpi_get_name(ds->handle, ACPI_FULL_PATHNAME, &name_buffer); 480c8f7a62cSLen Brown 4819254bc84SDmitry Torokhov printk(KERN_INFO PREFIX "%s - %s\n", 4829254bc84SDmitry Torokhov (char *)name_buffer.pointer, dock ? "docking" : "undocking"); 483c8f7a62cSLen Brown 484c8f7a62cSLen Brown /* _DCK method has one argument */ 485c8f7a62cSLen Brown arg_list.count = 1; 486c8f7a62cSLen Brown arg_list.pointer = &arg; 487c8f7a62cSLen Brown arg.type = ACPI_TYPE_INTEGER; 488c8f7a62cSLen Brown arg.integer.value = dock; 489c8f7a62cSLen Brown status = acpi_evaluate_object(ds->handle, "_DCK", &arg_list, &buffer); 490db350b08SShaohua Li if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) 4919254bc84SDmitry Torokhov printk(KERN_ERR PREFIX "%s - failed to execute _DCK\n", 4929254bc84SDmitry Torokhov (char *)name_buffer.pointer); 493c8f7a62cSLen Brown kfree(buffer.pointer); 494c8f7a62cSLen Brown kfree(name_buffer.pointer); 495c8f7a62cSLen Brown } 496c8f7a62cSLen Brown 497c8f7a62cSLen Brown static inline void dock(struct dock_station *ds) 498c8f7a62cSLen Brown { 499c8f7a62cSLen Brown handle_dock(ds, 1); 500c8f7a62cSLen Brown } 501c8f7a62cSLen Brown 502c8f7a62cSLen Brown static inline void undock(struct dock_station *ds) 503c8f7a62cSLen Brown { 504c8f7a62cSLen Brown handle_dock(ds, 0); 505c8f7a62cSLen Brown } 506c8f7a62cSLen Brown 507c8f7a62cSLen Brown static inline void begin_dock(struct dock_station *ds) 508c8f7a62cSLen Brown { 509c8f7a62cSLen Brown ds->flags |= DOCK_DOCKING; 510c8f7a62cSLen Brown } 511c8f7a62cSLen Brown 512c8f7a62cSLen Brown static inline void complete_dock(struct dock_station *ds) 513c8f7a62cSLen Brown { 514c8f7a62cSLen Brown ds->flags &= ~(DOCK_DOCKING); 515c8f7a62cSLen Brown ds->last_dock_time = jiffies; 516c8f7a62cSLen Brown } 517c8f7a62cSLen Brown 518a0cd35fdSKristen Carlson Accardi static inline void begin_undock(struct dock_station *ds) 519a0cd35fdSKristen Carlson Accardi { 520a0cd35fdSKristen Carlson Accardi ds->flags |= DOCK_UNDOCKING; 521a0cd35fdSKristen Carlson Accardi } 522a0cd35fdSKristen Carlson Accardi 523a0cd35fdSKristen Carlson Accardi static inline void complete_undock(struct dock_station *ds) 524a0cd35fdSKristen Carlson Accardi { 525a0cd35fdSKristen Carlson Accardi ds->flags &= ~(DOCK_UNDOCKING); 526a0cd35fdSKristen Carlson Accardi } 527a0cd35fdSKristen Carlson Accardi 528406f692dSShaohua Li static void dock_lock(struct dock_station *ds, int lock) 529406f692dSShaohua Li { 530406f692dSShaohua Li struct acpi_object_list arg_list; 531406f692dSShaohua Li union acpi_object arg; 532406f692dSShaohua Li acpi_status status; 533406f692dSShaohua Li 534406f692dSShaohua Li arg_list.count = 1; 535406f692dSShaohua Li arg_list.pointer = &arg; 536406f692dSShaohua Li arg.type = ACPI_TYPE_INTEGER; 537406f692dSShaohua Li arg.integer.value = !!lock; 538406f692dSShaohua Li status = acpi_evaluate_object(ds->handle, "_LCK", &arg_list, NULL); 539406f692dSShaohua Li if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { 540406f692dSShaohua Li if (lock) 541406f692dSShaohua Li printk(KERN_WARNING PREFIX "Locking device failed\n"); 542406f692dSShaohua Li else 543406f692dSShaohua Li printk(KERN_WARNING PREFIX "Unlocking device failed\n"); 544406f692dSShaohua Li } 545406f692dSShaohua Li } 546406f692dSShaohua Li 547c8f7a62cSLen Brown /** 548c8f7a62cSLen Brown * dock_in_progress - see if we are in the middle of handling a dock event 549c8f7a62cSLen Brown * @ds: the dock station 550c8f7a62cSLen Brown * 551c8f7a62cSLen Brown * Sometimes while docking, false dock events can be sent to the driver 552c8f7a62cSLen Brown * because good connections aren't made or some other reason. Ignore these 553c8f7a62cSLen Brown * if we are in the middle of doing something. 554c8f7a62cSLen Brown */ 555c8f7a62cSLen Brown static int dock_in_progress(struct dock_station *ds) 556c8f7a62cSLen Brown { 557c8f7a62cSLen Brown if ((ds->flags & DOCK_DOCKING) || 558c8f7a62cSLen Brown time_before(jiffies, (ds->last_dock_time + HZ))) 559c8f7a62cSLen Brown return 1; 560c8f7a62cSLen Brown return 0; 561c8f7a62cSLen Brown } 562c8f7a62cSLen Brown 563c8f7a62cSLen Brown /** 564c8f7a62cSLen Brown * register_dock_notifier - add yourself to the dock notifier list 565c8f7a62cSLen Brown * @nb: the callers notifier block 566c8f7a62cSLen Brown * 567c8f7a62cSLen Brown * If a driver wishes to be notified about dock events, they can 568c8f7a62cSLen Brown * use this function to put a notifier block on the dock notifier list. 569c8f7a62cSLen Brown * this notifier call chain will be called after a dock event, but 570c8f7a62cSLen Brown * before hotplugging any new devices. 571c8f7a62cSLen Brown */ 572c8f7a62cSLen Brown int register_dock_notifier(struct notifier_block *nb) 573c8f7a62cSLen Brown { 574db350b08SShaohua Li if (!dock_station_count) 5752548c06bSPrarit Bhargava return -ENODEV; 5762548c06bSPrarit Bhargava 577c8f7a62cSLen Brown return atomic_notifier_chain_register(&dock_notifier_list, nb); 578c8f7a62cSLen Brown } 579c8f7a62cSLen Brown 580c8f7a62cSLen Brown EXPORT_SYMBOL_GPL(register_dock_notifier); 581c8f7a62cSLen Brown 582c8f7a62cSLen Brown /** 583c8f7a62cSLen Brown * unregister_dock_notifier - remove yourself from the dock notifier list 584c8f7a62cSLen Brown * @nb: the callers notifier block 585c8f7a62cSLen Brown */ 586c8f7a62cSLen Brown void unregister_dock_notifier(struct notifier_block *nb) 587c8f7a62cSLen Brown { 588db350b08SShaohua Li if (!dock_station_count) 5892548c06bSPrarit Bhargava return; 5902548c06bSPrarit Bhargava 591c8f7a62cSLen Brown atomic_notifier_chain_unregister(&dock_notifier_list, nb); 592c8f7a62cSLen Brown } 593c8f7a62cSLen Brown 594c8f7a62cSLen Brown EXPORT_SYMBOL_GPL(unregister_dock_notifier); 595c8f7a62cSLen Brown 596c8f7a62cSLen Brown /** 597c8f7a62cSLen Brown * register_hotplug_dock_device - register a hotplug function 598c8f7a62cSLen Brown * @handle: the handle of the device 5991253f7aaSShaohua Li * @ops: handlers to call after docking 600c8f7a62cSLen Brown * @context: device specific data 601c8f7a62cSLen Brown * 602c8f7a62cSLen Brown * If a driver would like to perform a hotplug operation after a dock 603c8f7a62cSLen Brown * event, they can register an acpi_notifiy_handler to be called by 604c8f7a62cSLen Brown * the dock driver after _DCK is executed. 605c8f7a62cSLen Brown */ 606c8f7a62cSLen Brown int 6071253f7aaSShaohua Li register_hotplug_dock_device(acpi_handle handle, struct acpi_dock_ops *ops, 608c8f7a62cSLen Brown void *context) 609c8f7a62cSLen Brown { 610c8f7a62cSLen Brown struct dock_dependent_device *dd; 611db350b08SShaohua Li struct dock_station *dock_station; 612c8f7a62cSLen Brown 613db350b08SShaohua Li if (!dock_station_count) 614c8f7a62cSLen Brown return -ENODEV; 615c8f7a62cSLen Brown 616c8f7a62cSLen Brown /* 617c8f7a62cSLen Brown * make sure this handle is for a device dependent on the dock, 618c8f7a62cSLen Brown * this would include the dock station itself 619c8f7a62cSLen Brown */ 620db350b08SShaohua Li list_for_each_entry(dock_station, &dock_stations, sibiling) { 621c8f7a62cSLen Brown dd = find_dock_dependent_device(dock_station, handle); 622c8f7a62cSLen Brown if (dd) { 6231253f7aaSShaohua Li dd->ops = ops; 624c8f7a62cSLen Brown dd->context = context; 625c8f7a62cSLen Brown dock_add_hotplug_device(dock_station, dd); 626c8f7a62cSLen Brown return 0; 627c8f7a62cSLen Brown } 628db350b08SShaohua Li } 629c8f7a62cSLen Brown 630c8f7a62cSLen Brown return -EINVAL; 631c8f7a62cSLen Brown } 632c8f7a62cSLen Brown 633c8f7a62cSLen Brown EXPORT_SYMBOL_GPL(register_hotplug_dock_device); 634c8f7a62cSLen Brown 635c8f7a62cSLen Brown /** 636c8f7a62cSLen Brown * unregister_hotplug_dock_device - remove yourself from the hotplug list 637c8f7a62cSLen Brown * @handle: the acpi handle of the device 638c8f7a62cSLen Brown */ 639c8f7a62cSLen Brown void unregister_hotplug_dock_device(acpi_handle handle) 640c8f7a62cSLen Brown { 641c8f7a62cSLen Brown struct dock_dependent_device *dd; 642db350b08SShaohua Li struct dock_station *dock_station; 643c8f7a62cSLen Brown 644db350b08SShaohua Li if (!dock_station_count) 645c8f7a62cSLen Brown return; 646c8f7a62cSLen Brown 647db350b08SShaohua Li list_for_each_entry(dock_station, &dock_stations, sibiling) { 648c8f7a62cSLen Brown dd = find_dock_dependent_device(dock_station, handle); 649c8f7a62cSLen Brown if (dd) 650c8f7a62cSLen Brown dock_del_hotplug_device(dock_station, dd); 651c8f7a62cSLen Brown } 652db350b08SShaohua Li } 653c8f7a62cSLen Brown 654c8f7a62cSLen Brown EXPORT_SYMBOL_GPL(unregister_hotplug_dock_device); 655c8f7a62cSLen Brown 656c8f7a62cSLen Brown /** 657c80fdbe8Sbrandon@ifup.org * handle_eject_request - handle an undock request checking for error conditions 658c80fdbe8Sbrandon@ifup.org * 659c80fdbe8Sbrandon@ifup.org * Check to make sure the dock device is still present, then undock and 660c80fdbe8Sbrandon@ifup.org * hotremove all the devices that may need removing. 661c80fdbe8Sbrandon@ifup.org */ 662c80fdbe8Sbrandon@ifup.org static int handle_eject_request(struct dock_station *ds, u32 event) 663c80fdbe8Sbrandon@ifup.org { 664c80fdbe8Sbrandon@ifup.org if (dock_in_progress(ds)) 665c80fdbe8Sbrandon@ifup.org return -EBUSY; 666c80fdbe8Sbrandon@ifup.org 667c80fdbe8Sbrandon@ifup.org /* 668c80fdbe8Sbrandon@ifup.org * here we need to generate the undock 669c80fdbe8Sbrandon@ifup.org * event prior to actually doing the undock 670c80fdbe8Sbrandon@ifup.org * so that the device struct still exists. 671afd7301dSHolger Macht * Also, even send the dock event if the 672afd7301dSHolger Macht * device is not present anymore 673c80fdbe8Sbrandon@ifup.org */ 674c80fdbe8Sbrandon@ifup.org dock_event(ds, event, UNDOCK_EVENT); 675afd7301dSHolger Macht 676c80fdbe8Sbrandon@ifup.org hotplug_dock_devices(ds, ACPI_NOTIFY_EJECT_REQUEST); 677c80fdbe8Sbrandon@ifup.org undock(ds); 678406f692dSShaohua Li dock_lock(ds, 0); 679c80fdbe8Sbrandon@ifup.org eject_dock(ds); 680c80fdbe8Sbrandon@ifup.org if (dock_present(ds)) { 681c80fdbe8Sbrandon@ifup.org printk(KERN_ERR PREFIX "Unable to undock!\n"); 682c80fdbe8Sbrandon@ifup.org return -EBUSY; 683c80fdbe8Sbrandon@ifup.org } 684a0cd35fdSKristen Carlson Accardi complete_undock(ds); 685c80fdbe8Sbrandon@ifup.org return 0; 686c80fdbe8Sbrandon@ifup.org } 687c80fdbe8Sbrandon@ifup.org 688c80fdbe8Sbrandon@ifup.org /** 689c8f7a62cSLen Brown * dock_notify - act upon an acpi dock notification 690c8f7a62cSLen Brown * @handle: the dock station handle 691c8f7a62cSLen Brown * @event: the acpi event 692c8f7a62cSLen Brown * @data: our driver data struct 693c8f7a62cSLen Brown * 694c8f7a62cSLen Brown * If we are notified to dock, then check to see if the dock is 695c8f7a62cSLen Brown * present and then dock. Notify all drivers of the dock event, 696c80fdbe8Sbrandon@ifup.org * and then hotplug and devices that may need hotplugging. 697c8f7a62cSLen Brown */ 698c8f7a62cSLen Brown static void dock_notify(acpi_handle handle, u32 event, void *data) 699c8f7a62cSLen Brown { 70050dd0969SJan Engelhardt struct dock_station *ds = data; 7018b59560aSShaohua Li struct acpi_device *tmp; 702db350b08SShaohua Li int surprise_removal = 0; 703c8f7a62cSLen Brown 704db350b08SShaohua Li /* 705db350b08SShaohua Li * According to acpi spec 3.0a, if a DEVICE_CHECK notification 706db350b08SShaohua Li * is sent and _DCK is present, it is assumed to mean an undock 707db350b08SShaohua Li * request. 708db350b08SShaohua Li */ 709db350b08SShaohua Li if ((ds->flags & DOCK_IS_DOCK) && event == ACPI_NOTIFY_DEVICE_CHECK) 710db350b08SShaohua Li event = ACPI_NOTIFY_EJECT_REQUEST; 711db350b08SShaohua Li 712db350b08SShaohua Li /* 713db350b08SShaohua Li * dock station: BUS_CHECK - docked or surprise removal 714db350b08SShaohua Li * DEVICE_CHECK - undocked 715db350b08SShaohua Li * other device: BUS_CHECK/DEVICE_CHECK - added or surprise removal 716db350b08SShaohua Li * 717db350b08SShaohua Li * To simplify event handling, dock dependent device handler always 718db350b08SShaohua Li * get ACPI_NOTIFY_BUS_CHECK/ACPI_NOTIFY_DEVICE_CHECK for add and 719db350b08SShaohua Li * ACPI_NOTIFY_EJECT_REQUEST for removal 720db350b08SShaohua Li */ 721c8f7a62cSLen Brown switch (event) { 722c8f7a62cSLen Brown case ACPI_NOTIFY_BUS_CHECK: 723db350b08SShaohua Li case ACPI_NOTIFY_DEVICE_CHECK: 7248b59560aSShaohua Li if (!dock_in_progress(ds) && acpi_bus_get_device(ds->handle, 7258b59560aSShaohua Li &tmp)) { 726c8f7a62cSLen Brown begin_dock(ds); 727c8f7a62cSLen Brown dock(ds); 728c8f7a62cSLen Brown if (!dock_present(ds)) { 729c8f7a62cSLen Brown printk(KERN_ERR PREFIX "Unable to dock!\n"); 7308b59560aSShaohua Li complete_dock(ds); 731c8f7a62cSLen Brown break; 732c8f7a62cSLen Brown } 733c8f7a62cSLen Brown atomic_notifier_call_chain(&dock_notifier_list, 734c8f7a62cSLen Brown event, NULL); 735c8f7a62cSLen Brown hotplug_dock_devices(ds, event); 736c8f7a62cSLen Brown complete_dock(ds); 737c8f7a62cSLen Brown dock_event(ds, event, DOCK_EVENT); 738406f692dSShaohua Li dock_lock(ds, 1); 739c8f7a62cSLen Brown break; 740db350b08SShaohua Li } 741db350b08SShaohua Li if (dock_present(ds) || dock_in_progress(ds)) 742db350b08SShaohua Li break; 743db350b08SShaohua Li /* This is a surprise removal */ 744db350b08SShaohua Li surprise_removal = 1; 745db350b08SShaohua Li event = ACPI_NOTIFY_EJECT_REQUEST; 746db350b08SShaohua Li /* Fall back */ 747c8f7a62cSLen Brown case ACPI_NOTIFY_EJECT_REQUEST: 748a0cd35fdSKristen Carlson Accardi begin_undock(ds); 749f730ae18SShaohua Li if ((immediate_undock && !(ds->flags & DOCK_IS_ATA)) 750f730ae18SShaohua Li || surprise_removal) 751c80fdbe8Sbrandon@ifup.org handle_eject_request(ds, event); 752a0cd35fdSKristen Carlson Accardi else 753a0cd35fdSKristen Carlson Accardi dock_event(ds, event, UNDOCK_EVENT); 754c8f7a62cSLen Brown break; 755c8f7a62cSLen Brown default: 756c8f7a62cSLen Brown printk(KERN_ERR PREFIX "Unknown dock event %d\n", event); 757c8f7a62cSLen Brown } 758c8f7a62cSLen Brown } 759c8f7a62cSLen Brown 76019cd847aSZhang Rui struct dock_data { 76119cd847aSZhang Rui acpi_handle handle; 76219cd847aSZhang Rui unsigned long event; 76319cd847aSZhang Rui struct dock_station *ds; 76419cd847aSZhang Rui }; 76519cd847aSZhang Rui 76619cd847aSZhang Rui static void acpi_dock_deferred_cb(void *context) 76719cd847aSZhang Rui { 76819cd847aSZhang Rui struct dock_data *data = (struct dock_data *)context; 76919cd847aSZhang Rui 77019cd847aSZhang Rui dock_notify(data->handle, data->event, data->ds); 77119cd847aSZhang Rui kfree(data); 77219cd847aSZhang Rui } 77319cd847aSZhang Rui 7746bd00a61SShaohua Li static int acpi_dock_notifier_call(struct notifier_block *this, 7756bd00a61SShaohua Li unsigned long event, void *data) 7766bd00a61SShaohua Li { 7776bd00a61SShaohua Li struct dock_station *dock_station; 7786bd00a61SShaohua Li acpi_handle handle = (acpi_handle)data; 7796bd00a61SShaohua Li 7806bd00a61SShaohua Li if (event != ACPI_NOTIFY_BUS_CHECK && event != ACPI_NOTIFY_DEVICE_CHECK 7816bd00a61SShaohua Li && event != ACPI_NOTIFY_EJECT_REQUEST) 7826bd00a61SShaohua Li return 0; 7836bd00a61SShaohua Li list_for_each_entry(dock_station, &dock_stations, sibiling) { 7846bd00a61SShaohua Li if (dock_station->handle == handle) { 78519cd847aSZhang Rui struct dock_data *dock_data; 78619cd847aSZhang Rui 78719cd847aSZhang Rui dock_data = kmalloc(sizeof(*dock_data), GFP_KERNEL); 78819cd847aSZhang Rui if (!dock_data) 78919cd847aSZhang Rui return 0; 79019cd847aSZhang Rui dock_data->handle = handle; 79119cd847aSZhang Rui dock_data->event = event; 79219cd847aSZhang Rui dock_data->ds = dock_station; 79319cd847aSZhang Rui acpi_os_hotplug_execute(acpi_dock_deferred_cb, 79419cd847aSZhang Rui dock_data); 7956bd00a61SShaohua Li return 0 ; 7966bd00a61SShaohua Li } 7976bd00a61SShaohua Li } 7986bd00a61SShaohua Li return 0; 7996bd00a61SShaohua Li } 8006bd00a61SShaohua Li 8016bd00a61SShaohua Li static struct notifier_block dock_acpi_notifier = { 8026bd00a61SShaohua Li .notifier_call = acpi_dock_notifier_call, 8036bd00a61SShaohua Li }; 8046bd00a61SShaohua Li 805c8f7a62cSLen Brown /** 806c8f7a62cSLen Brown * find_dock_devices - find devices on the dock station 807c8f7a62cSLen Brown * @handle: the handle of the device we are examining 808c8f7a62cSLen Brown * @lvl: unused 809c8f7a62cSLen Brown * @context: the dock station private data 810c8f7a62cSLen Brown * @rv: unused 811c8f7a62cSLen Brown * 812c8f7a62cSLen Brown * This function is called by acpi_walk_namespace. It will 813c8f7a62cSLen Brown * check to see if an object has an _EJD method. If it does, then it 814c8f7a62cSLen Brown * will see if it is dependent on the dock station. 815c8f7a62cSLen Brown */ 816c8f7a62cSLen Brown static acpi_status 817c8f7a62cSLen Brown find_dock_devices(acpi_handle handle, u32 lvl, void *context, void **rv) 818c8f7a62cSLen Brown { 819c8f7a62cSLen Brown acpi_status status; 820fe9a2f77SKristen Carlson Accardi acpi_handle tmp, parent; 82150dd0969SJan Engelhardt struct dock_station *ds = context; 822c8f7a62cSLen Brown struct dock_dependent_device *dd; 823c8f7a62cSLen Brown 824c8f7a62cSLen Brown status = acpi_bus_get_ejd(handle, &tmp); 825fe9a2f77SKristen Carlson Accardi if (ACPI_FAILURE(status)) { 826fe9a2f77SKristen Carlson Accardi /* try the parent device as well */ 827fe9a2f77SKristen Carlson Accardi status = acpi_get_parent(handle, &parent); 828c8f7a62cSLen Brown if (ACPI_FAILURE(status)) 829fe9a2f77SKristen Carlson Accardi goto fdd_out; 830fe9a2f77SKristen Carlson Accardi /* see if parent is dependent on dock */ 831fe9a2f77SKristen Carlson Accardi status = acpi_bus_get_ejd(parent, &tmp); 832fe9a2f77SKristen Carlson Accardi if (ACPI_FAILURE(status)) 833fe9a2f77SKristen Carlson Accardi goto fdd_out; 834fe9a2f77SKristen Carlson Accardi } 835c8f7a62cSLen Brown 836c8f7a62cSLen Brown if (tmp == ds->handle) { 837c8f7a62cSLen Brown dd = alloc_dock_dependent_device(handle); 838c8f7a62cSLen Brown if (dd) 839c8f7a62cSLen Brown add_dock_dependent_device(ds, dd); 840c8f7a62cSLen Brown } 841fe9a2f77SKristen Carlson Accardi fdd_out: 842c8f7a62cSLen Brown return AE_OK; 843c8f7a62cSLen Brown } 844c8f7a62cSLen Brown 845c80fdbe8Sbrandon@ifup.org /* 846c80fdbe8Sbrandon@ifup.org * show_docked - read method for "docked" file in sysfs 847c80fdbe8Sbrandon@ifup.org */ 848c80fdbe8Sbrandon@ifup.org static ssize_t show_docked(struct device *dev, 849c80fdbe8Sbrandon@ifup.org struct device_attribute *attr, char *buf) 850c80fdbe8Sbrandon@ifup.org { 851db350b08SShaohua Li struct dock_station *dock_station = *((struct dock_station **) 852db350b08SShaohua Li dev->platform_data); 853c80fdbe8Sbrandon@ifup.org return snprintf(buf, PAGE_SIZE, "%d\n", dock_present(dock_station)); 854c80fdbe8Sbrandon@ifup.org 855c80fdbe8Sbrandon@ifup.org } 856e5685b9dSAdrian Bunk static DEVICE_ATTR(docked, S_IRUGO, show_docked, NULL); 857c80fdbe8Sbrandon@ifup.org 858c80fdbe8Sbrandon@ifup.org /* 859a0cd35fdSKristen Carlson Accardi * show_flags - read method for flags file in sysfs 860a0cd35fdSKristen Carlson Accardi */ 861a0cd35fdSKristen Carlson Accardi static ssize_t show_flags(struct device *dev, 862a0cd35fdSKristen Carlson Accardi struct device_attribute *attr, char *buf) 863a0cd35fdSKristen Carlson Accardi { 864db350b08SShaohua Li struct dock_station *dock_station = *((struct dock_station **) 865db350b08SShaohua Li dev->platform_data); 866a0cd35fdSKristen Carlson Accardi return snprintf(buf, PAGE_SIZE, "%d\n", dock_station->flags); 867a0cd35fdSKristen Carlson Accardi 868a0cd35fdSKristen Carlson Accardi } 869e5685b9dSAdrian Bunk static DEVICE_ATTR(flags, S_IRUGO, show_flags, NULL); 870a0cd35fdSKristen Carlson Accardi 871a0cd35fdSKristen Carlson Accardi /* 872c80fdbe8Sbrandon@ifup.org * write_undock - write method for "undock" file in sysfs 873c80fdbe8Sbrandon@ifup.org */ 874c80fdbe8Sbrandon@ifup.org static ssize_t write_undock(struct device *dev, struct device_attribute *attr, 875c80fdbe8Sbrandon@ifup.org const char *buf, size_t count) 876c80fdbe8Sbrandon@ifup.org { 877c80fdbe8Sbrandon@ifup.org int ret; 878db350b08SShaohua Li struct dock_station *dock_station = *((struct dock_station **) 879db350b08SShaohua Li dev->platform_data); 880c80fdbe8Sbrandon@ifup.org 881c80fdbe8Sbrandon@ifup.org if (!count) 882c80fdbe8Sbrandon@ifup.org return -EINVAL; 883c80fdbe8Sbrandon@ifup.org 8849171f834SHolger Macht begin_undock(dock_station); 885c80fdbe8Sbrandon@ifup.org ret = handle_eject_request(dock_station, ACPI_NOTIFY_EJECT_REQUEST); 886c80fdbe8Sbrandon@ifup.org return ret ? ret: count; 887c80fdbe8Sbrandon@ifup.org } 888e5685b9dSAdrian Bunk static DEVICE_ATTR(undock, S_IWUSR, NULL, write_undock); 889c80fdbe8Sbrandon@ifup.org 890ac122bb6SIlya A. Volynets-Evenbakh /* 891ac122bb6SIlya A. Volynets-Evenbakh * show_dock_uid - read method for "uid" file in sysfs 892ac122bb6SIlya A. Volynets-Evenbakh */ 893ac122bb6SIlya A. Volynets-Evenbakh static ssize_t show_dock_uid(struct device *dev, 894ac122bb6SIlya A. Volynets-Evenbakh struct device_attribute *attr, char *buf) 895ac122bb6SIlya A. Volynets-Evenbakh { 896ac122bb6SIlya A. Volynets-Evenbakh unsigned long lbuf; 897db350b08SShaohua Li struct dock_station *dock_station = *((struct dock_station **) 898db350b08SShaohua Li dev->platform_data); 89938ff4ffcSKristen Carlson Accardi acpi_status status = acpi_evaluate_integer(dock_station->handle, 90038ff4ffcSKristen Carlson Accardi "_UID", NULL, &lbuf); 90138ff4ffcSKristen Carlson Accardi if (ACPI_FAILURE(status)) 902ac122bb6SIlya A. Volynets-Evenbakh return 0; 90338ff4ffcSKristen Carlson Accardi 904ac122bb6SIlya A. Volynets-Evenbakh return snprintf(buf, PAGE_SIZE, "%lx\n", lbuf); 905ac122bb6SIlya A. Volynets-Evenbakh } 906e5685b9dSAdrian Bunk static DEVICE_ATTR(uid, S_IRUGO, show_dock_uid, NULL); 907ac122bb6SIlya A. Volynets-Evenbakh 908c8f7a62cSLen Brown /** 909c8f7a62cSLen Brown * dock_add - add a new dock station 910c8f7a62cSLen Brown * @handle: the dock station handle 911c8f7a62cSLen Brown * 912c8f7a62cSLen Brown * allocated and initialize a new dock station device. Find all devices 913c8f7a62cSLen Brown * that are on the dock station, and register for dock event notifications. 914c8f7a62cSLen Brown */ 915c8f7a62cSLen Brown static int dock_add(acpi_handle handle) 916c8f7a62cSLen Brown { 917c8f7a62cSLen Brown int ret; 918c8f7a62cSLen Brown struct dock_dependent_device *dd; 919db350b08SShaohua Li struct dock_station *dock_station; 920db350b08SShaohua Li struct platform_device *dock_device; 921c8f7a62cSLen Brown 922c8f7a62cSLen Brown /* allocate & initialize the dock_station private data */ 923c8f7a62cSLen Brown dock_station = kzalloc(sizeof(*dock_station), GFP_KERNEL); 924c8f7a62cSLen Brown if (!dock_station) 925c8f7a62cSLen Brown return -ENOMEM; 926c8f7a62cSLen Brown dock_station->handle = handle; 927c8f7a62cSLen Brown dock_station->last_dock_time = jiffies - HZ; 928c8f7a62cSLen Brown INIT_LIST_HEAD(&dock_station->dependent_devices); 929c8f7a62cSLen Brown INIT_LIST_HEAD(&dock_station->hotplug_devices); 930db350b08SShaohua Li INIT_LIST_HEAD(&dock_station->sibiling); 931c8f7a62cSLen Brown spin_lock_init(&dock_station->dd_lock); 9328b0dc866SKristen Carlson Accardi mutex_init(&dock_station->hp_lock); 93307a18684SKristen Accardi ATOMIC_INIT_NOTIFIER_HEAD(&dock_notifier_list); 934c8f7a62cSLen Brown 935671adbecSKristen Carlson Accardi /* initialize platform device stuff */ 936db350b08SShaohua Li dock_station->dock_device = 937db350b08SShaohua Li platform_device_register_simple(dock_device_name, 938db350b08SShaohua Li dock_station_count, NULL, 0); 939db350b08SShaohua Li dock_device = dock_station->dock_device; 9400f6f2804SKristen Carlson Accardi if (IS_ERR(dock_device)) { 9410f6f2804SKristen Carlson Accardi kfree(dock_station); 9420f6f2804SKristen Carlson Accardi dock_station = NULL; 9430f6f2804SKristen Carlson Accardi return PTR_ERR(dock_device); 9440f6f2804SKristen Carlson Accardi } 945db350b08SShaohua Li platform_device_add_data(dock_device, &dock_station, 946db350b08SShaohua Li sizeof(struct dock_station *)); 947a0cd35fdSKristen Carlson Accardi 9489ef2a9a9SKristen Carlson Accardi /* we want the dock device to send uevents */ 9499ef2a9a9SKristen Carlson Accardi dock_device->dev.uevent_suppress = 0; 9509ef2a9a9SKristen Carlson Accardi 951db350b08SShaohua Li if (is_dock(handle)) 952db350b08SShaohua Li dock_station->flags |= DOCK_IS_DOCK; 953db350b08SShaohua Li if (is_ata(handle)) 954db350b08SShaohua Li dock_station->flags |= DOCK_IS_ATA; 955db350b08SShaohua Li if (is_battery(handle)) 956db350b08SShaohua Li dock_station->flags |= DOCK_IS_BAT; 957db350b08SShaohua Li 9580f6f2804SKristen Carlson Accardi ret = device_create_file(&dock_device->dev, &dev_attr_docked); 959671adbecSKristen Carlson Accardi if (ret) { 9600f6f2804SKristen Carlson Accardi printk("Error %d adding sysfs file\n", ret); 9610f6f2804SKristen Carlson Accardi platform_device_unregister(dock_device); 962671adbecSKristen Carlson Accardi kfree(dock_station); 96322fe4c21SChuck Ebbert dock_station = NULL; 964671adbecSKristen Carlson Accardi return ret; 965671adbecSKristen Carlson Accardi } 9660f6f2804SKristen Carlson Accardi ret = device_create_file(&dock_device->dev, &dev_attr_undock); 967c80fdbe8Sbrandon@ifup.org if (ret) { 968c80fdbe8Sbrandon@ifup.org printk("Error %d adding sysfs file\n", ret); 9690f6f2804SKristen Carlson Accardi device_remove_file(&dock_device->dev, &dev_attr_docked); 9700f6f2804SKristen Carlson Accardi platform_device_unregister(dock_device); 971c80fdbe8Sbrandon@ifup.org kfree(dock_station); 97222fe4c21SChuck Ebbert dock_station = NULL; 973c80fdbe8Sbrandon@ifup.org return ret; 974c80fdbe8Sbrandon@ifup.org } 9750f6f2804SKristen Carlson Accardi ret = device_create_file(&dock_device->dev, &dev_attr_uid); 976c80fdbe8Sbrandon@ifup.org if (ret) { 977c80fdbe8Sbrandon@ifup.org printk("Error %d adding sysfs file\n", ret); 9780f6f2804SKristen Carlson Accardi device_remove_file(&dock_device->dev, &dev_attr_docked); 9790f6f2804SKristen Carlson Accardi device_remove_file(&dock_device->dev, &dev_attr_undock); 9800f6f2804SKristen Carlson Accardi platform_device_unregister(dock_device); 981ac122bb6SIlya A. Volynets-Evenbakh kfree(dock_station); 98222fe4c21SChuck Ebbert dock_station = NULL; 983ac122bb6SIlya A. Volynets-Evenbakh return ret; 984ac122bb6SIlya A. Volynets-Evenbakh } 985a0cd35fdSKristen Carlson Accardi ret = device_create_file(&dock_device->dev, &dev_attr_flags); 986a0cd35fdSKristen Carlson Accardi if (ret) { 987a0cd35fdSKristen Carlson Accardi printk("Error %d adding sysfs file\n", ret); 988a0cd35fdSKristen Carlson Accardi device_remove_file(&dock_device->dev, &dev_attr_docked); 989a0cd35fdSKristen Carlson Accardi device_remove_file(&dock_device->dev, &dev_attr_undock); 990a0cd35fdSKristen Carlson Accardi device_remove_file(&dock_device->dev, &dev_attr_uid); 991a0cd35fdSKristen Carlson Accardi platform_device_unregister(dock_device); 992a0cd35fdSKristen Carlson Accardi kfree(dock_station); 993a0cd35fdSKristen Carlson Accardi dock_station = NULL; 994a0cd35fdSKristen Carlson Accardi return ret; 995a0cd35fdSKristen Carlson Accardi } 996671adbecSKristen Carlson Accardi 997c8f7a62cSLen Brown /* Find dependent devices */ 998c8f7a62cSLen Brown acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, 999c8f7a62cSLen Brown ACPI_UINT32_MAX, find_dock_devices, dock_station, 1000c8f7a62cSLen Brown NULL); 1001c8f7a62cSLen Brown 1002c8f7a62cSLen Brown /* add the dock station as a device dependent on itself */ 1003c8f7a62cSLen Brown dd = alloc_dock_dependent_device(handle); 1004c8f7a62cSLen Brown if (!dd) { 1005c8f7a62cSLen Brown kfree(dock_station); 100622fe4c21SChuck Ebbert dock_station = NULL; 1007671adbecSKristen Carlson Accardi ret = -ENOMEM; 1008671adbecSKristen Carlson Accardi goto dock_add_err_unregister; 1009c8f7a62cSLen Brown } 1010c8f7a62cSLen Brown add_dock_dependent_device(dock_station, dd); 1011c8f7a62cSLen Brown 1012db350b08SShaohua Li dock_station_count++; 1013db350b08SShaohua Li list_add(&dock_station->sibiling, &dock_stations); 1014c8f7a62cSLen Brown return 0; 1015c8f7a62cSLen Brown 1016671adbecSKristen Carlson Accardi dock_add_err_unregister: 10170f6f2804SKristen Carlson Accardi device_remove_file(&dock_device->dev, &dev_attr_docked); 10180f6f2804SKristen Carlson Accardi device_remove_file(&dock_device->dev, &dev_attr_undock); 10190f6f2804SKristen Carlson Accardi device_remove_file(&dock_device->dev, &dev_attr_uid); 1020a0cd35fdSKristen Carlson Accardi device_remove_file(&dock_device->dev, &dev_attr_flags); 10210f6f2804SKristen Carlson Accardi platform_device_unregister(dock_device); 1022671adbecSKristen Carlson Accardi kfree(dock_station); 102322fe4c21SChuck Ebbert dock_station = NULL; 1024c8f7a62cSLen Brown return ret; 1025c8f7a62cSLen Brown } 1026c8f7a62cSLen Brown 1027c8f7a62cSLen Brown /** 1028c8f7a62cSLen Brown * dock_remove - free up resources related to the dock station 1029c8f7a62cSLen Brown */ 1030db350b08SShaohua Li static int dock_remove(struct dock_station *dock_station) 1031c8f7a62cSLen Brown { 1032c8f7a62cSLen Brown struct dock_dependent_device *dd, *tmp; 1033db350b08SShaohua Li struct platform_device *dock_device = dock_station->dock_device; 1034c8f7a62cSLen Brown 1035db350b08SShaohua Li if (!dock_station_count) 1036c8f7a62cSLen Brown return 0; 1037c8f7a62cSLen Brown 1038c8f7a62cSLen Brown /* remove dependent devices */ 1039c8f7a62cSLen Brown list_for_each_entry_safe(dd, tmp, &dock_station->dependent_devices, 1040c8f7a62cSLen Brown list) 1041c8f7a62cSLen Brown kfree(dd); 1042c8f7a62cSLen Brown 1043671adbecSKristen Carlson Accardi /* cleanup sysfs */ 10440f6f2804SKristen Carlson Accardi device_remove_file(&dock_device->dev, &dev_attr_docked); 10450f6f2804SKristen Carlson Accardi device_remove_file(&dock_device->dev, &dev_attr_undock); 10460f6f2804SKristen Carlson Accardi device_remove_file(&dock_device->dev, &dev_attr_uid); 1047a0cd35fdSKristen Carlson Accardi device_remove_file(&dock_device->dev, &dev_attr_flags); 10480f6f2804SKristen Carlson Accardi platform_device_unregister(dock_device); 1049671adbecSKristen Carlson Accardi 1050c8f7a62cSLen Brown /* free dock station memory */ 1051c8f7a62cSLen Brown kfree(dock_station); 105222fe4c21SChuck Ebbert dock_station = NULL; 1053c8f7a62cSLen Brown return 0; 1054c8f7a62cSLen Brown } 1055c8f7a62cSLen Brown 1056c8f7a62cSLen Brown /** 1057c8f7a62cSLen Brown * find_dock - look for a dock station 1058c8f7a62cSLen Brown * @handle: acpi handle of a device 1059c8f7a62cSLen Brown * @lvl: unused 1060c8f7a62cSLen Brown * @context: counter of dock stations found 1061c8f7a62cSLen Brown * @rv: unused 1062c8f7a62cSLen Brown * 1063c8f7a62cSLen Brown * This is called by acpi_walk_namespace to look for dock stations. 1064c8f7a62cSLen Brown */ 1065c8f7a62cSLen Brown static acpi_status 1066c8f7a62cSLen Brown find_dock(acpi_handle handle, u32 lvl, void *context, void **rv) 1067c8f7a62cSLen Brown { 1068c8f7a62cSLen Brown acpi_status status = AE_OK; 1069c8f7a62cSLen Brown 1070c8f7a62cSLen Brown if (is_dock(handle)) { 1071c8f7a62cSLen Brown if (dock_add(handle) >= 0) { 1072c8f7a62cSLen Brown status = AE_CTRL_TERMINATE; 1073c8f7a62cSLen Brown } 1074c8f7a62cSLen Brown } 1075c8f7a62cSLen Brown return status; 1076c8f7a62cSLen Brown } 1077c8f7a62cSLen Brown 1078db350b08SShaohua Li static acpi_status 1079db350b08SShaohua Li find_bay(acpi_handle handle, u32 lvl, void *context, void **rv) 1080db350b08SShaohua Li { 1081db350b08SShaohua Li /* If bay is in a dock, it's already handled */ 1082db350b08SShaohua Li if (is_ejectable_bay(handle) && !is_dock_device(handle)) 1083db350b08SShaohua Li dock_add(handle); 1084db350b08SShaohua Li return AE_OK; 1085db350b08SShaohua Li } 1086db350b08SShaohua Li 1087c8f7a62cSLen Brown static int __init dock_init(void) 1088c8f7a62cSLen Brown { 1089816c2edaSLen Brown if (acpi_disabled) 1090816c2edaSLen Brown return 0; 1091816c2edaSLen Brown 1092c8f7a62cSLen Brown /* look for a dock station */ 1093c8f7a62cSLen Brown acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, 1094db350b08SShaohua Li ACPI_UINT32_MAX, find_dock, NULL, NULL); 1095c8f7a62cSLen Brown 1096db350b08SShaohua Li /* look for bay */ 1097db350b08SShaohua Li acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, 1098db350b08SShaohua Li ACPI_UINT32_MAX, find_bay, NULL, NULL); 1099db350b08SShaohua Li if (!dock_station_count) { 1100db350b08SShaohua Li printk(KERN_INFO PREFIX "No dock devices found.\n"); 1101db350b08SShaohua Li return 0; 1102db350b08SShaohua Li } 1103c8f7a62cSLen Brown 11046bd00a61SShaohua Li register_acpi_bus_notifier(&dock_acpi_notifier); 1105db350b08SShaohua Li printk(KERN_INFO PREFIX "%s: %d docks/bays found\n", 1106db350b08SShaohua Li ACPI_DOCK_DRIVER_DESCRIPTION, dock_station_count); 1107c8f7a62cSLen Brown return 0; 1108c8f7a62cSLen Brown } 1109c8f7a62cSLen Brown 1110c8f7a62cSLen Brown static void __exit dock_exit(void) 1111c8f7a62cSLen Brown { 1112db350b08SShaohua Li struct dock_station *dock_station; 1113db350b08SShaohua Li 11146bd00a61SShaohua Li unregister_acpi_bus_notifier(&dock_acpi_notifier); 1115db350b08SShaohua Li list_for_each_entry(dock_station, &dock_stations, sibiling) 1116db350b08SShaohua Li dock_remove(dock_station); 1117c8f7a62cSLen Brown } 1118c8f7a62cSLen Brown 1119db350b08SShaohua Li /* 1120db350b08SShaohua Li * Must be called before drivers of devices in dock, otherwise we can't know 1121db350b08SShaohua Li * which devices are in a dock 1122db350b08SShaohua Li */ 1123db350b08SShaohua Li subsys_initcall(dock_init); 1124c8f7a62cSLen Brown module_exit(dock_exit); 1125