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> 275a0e3ad6STejun Heo #include <linux/slab.h> 28c8f7a62cSLen Brown #include <linux/init.h> 29c8f7a62cSLen Brown #include <linux/types.h> 30c8f7a62cSLen Brown #include <linux/notifier.h> 31671adbecSKristen Carlson Accardi #include <linux/platform_device.h> 32914e2637SAl Viro #include <linux/jiffies.h> 3362a6d7fdSRandy Dunlap #include <linux/stddef.h> 34cd73018fSToshi Kani #include <linux/acpi.h> 35c8f7a62cSLen Brown #include <acpi/acpi_bus.h> 36c8f7a62cSLen Brown #include <acpi/acpi_drivers.h> 37c8f7a62cSLen Brown 38a192a958SLen Brown #define PREFIX "ACPI: " 39a192a958SLen Brown 407cda93e0SLen Brown #define ACPI_DOCK_DRIVER_DESCRIPTION "ACPI Dock Station Driver" 41c8f7a62cSLen Brown 42f52fd66dSLen Brown ACPI_MODULE_NAME("dock"); 43c8f7a62cSLen Brown MODULE_AUTHOR("Kristen Carlson Accardi"); 447cda93e0SLen Brown MODULE_DESCRIPTION(ACPI_DOCK_DRIVER_DESCRIPTION); 45c8f7a62cSLen Brown MODULE_LICENSE("GPL"); 46c8f7a62cSLen Brown 4790ab5ee9SRusty Russell static bool immediate_undock = 1; 48a0cd35fdSKristen Carlson Accardi module_param(immediate_undock, bool, 0644); 49a0cd35fdSKristen Carlson Accardi MODULE_PARM_DESC(immediate_undock, "1 (default) will cause the driver to " 50a0cd35fdSKristen Carlson Accardi "undock immediately when the undock button is pressed, 0 will cause" 51a0cd35fdSKristen Carlson Accardi " the driver to wait for userspace to write the undock sysfs file " 52a0cd35fdSKristen Carlson Accardi " before undocking"); 53a0cd35fdSKristen Carlson Accardi 54a340af14SFrank Seidel static const struct acpi_device_id dock_device_ids[] = { 55a340af14SFrank Seidel {"LNXDOCK", 0}, 56a340af14SFrank Seidel {"", 0}, 57a340af14SFrank Seidel }; 58a340af14SFrank Seidel MODULE_DEVICE_TABLE(acpi, dock_device_ids); 59a340af14SFrank Seidel 60c8f7a62cSLen Brown struct dock_station { 61c8f7a62cSLen Brown acpi_handle handle; 62c8f7a62cSLen Brown unsigned long last_dock_time; 63c8f7a62cSLen Brown u32 flags; 64c8f7a62cSLen Brown struct list_head dependent_devices; 65db350b08SShaohua Li 6650d716e4SAlex Chiang struct list_head sibling; 67db350b08SShaohua Li struct platform_device *dock_device; 68c8f7a62cSLen Brown }; 69db350b08SShaohua Li static LIST_HEAD(dock_stations); 70db350b08SShaohua Li static int dock_station_count; 7121a31013SRafael J. Wysocki static DEFINE_MUTEX(hotplug_lock); 72c8f7a62cSLen Brown 73c8f7a62cSLen Brown struct dock_dependent_device { 74c8f7a62cSLen Brown struct list_head list; 75c8f7a62cSLen Brown acpi_handle handle; 7621a31013SRafael J. Wysocki const struct acpi_dock_ops *hp_ops; 7721a31013SRafael J. Wysocki void *hp_context; 7821a31013SRafael J. Wysocki unsigned int hp_refcount; 7921a31013SRafael J. Wysocki void (*hp_release)(void *); 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 90f09ce741SRafael J. Wysocki enum dock_callback_type { 91f09ce741SRafael J. Wysocki DOCK_CALL_HANDLER, 92f09ce741SRafael J. Wysocki DOCK_CALL_FIXUP, 93f09ce741SRafael J. Wysocki DOCK_CALL_UEVENT, 94f09ce741SRafael J. Wysocki }; 95f09ce741SRafael J. Wysocki 96c8f7a62cSLen Brown /***************************************************************************** 97c8f7a62cSLen Brown * Dock Dependent device functions * 98c8f7a62cSLen Brown *****************************************************************************/ 99c8f7a62cSLen Brown /** 100f69cfdd2SAlex Chiang * add_dock_dependent_device - associate a device with the dock station 101f69cfdd2SAlex Chiang * @ds: The dock station 102f69cfdd2SAlex Chiang * @handle: handle of the dependent device 103c8f7a62cSLen Brown * 104f69cfdd2SAlex Chiang * Add the dependent device to the dock's dependent device list. 105c8f7a62cSLen Brown */ 106d423c083SJiang Liu static int __init 107f69cfdd2SAlex Chiang add_dock_dependent_device(struct dock_station *ds, acpi_handle handle) 108c8f7a62cSLen Brown { 109c8f7a62cSLen Brown struct dock_dependent_device *dd; 110c8f7a62cSLen Brown 111c8f7a62cSLen Brown dd = kzalloc(sizeof(*dd), GFP_KERNEL); 112f69cfdd2SAlex Chiang if (!dd) 113f69cfdd2SAlex Chiang return -ENOMEM; 114f69cfdd2SAlex Chiang 115c8f7a62cSLen Brown dd->handle = handle; 116c8f7a62cSLen Brown INIT_LIST_HEAD(&dd->list); 117c8f7a62cSLen Brown list_add_tail(&dd->list, &ds->dependent_devices); 118f69cfdd2SAlex Chiang 119f69cfdd2SAlex Chiang return 0; 120c8f7a62cSLen Brown } 121c8f7a62cSLen Brown 122a30c4c5eSRafael J. Wysocki static void remove_dock_dependent_devices(struct dock_station *ds) 123a30c4c5eSRafael J. Wysocki { 124a30c4c5eSRafael J. Wysocki struct dock_dependent_device *dd, *aux; 125a30c4c5eSRafael J. Wysocki 126a30c4c5eSRafael J. Wysocki list_for_each_entry_safe(dd, aux, &ds->dependent_devices, list) { 127a30c4c5eSRafael J. Wysocki list_del(&dd->list); 128a30c4c5eSRafael J. Wysocki kfree(dd); 129a30c4c5eSRafael J. Wysocki } 130a30c4c5eSRafael J. Wysocki } 131a30c4c5eSRafael J. Wysocki 132c8f7a62cSLen Brown /** 13321a31013SRafael J. Wysocki * dock_init_hotplug - Initialize a hotplug device on a docking station. 13421a31013SRafael J. Wysocki * @dd: Dock-dependent device. 13521a31013SRafael J. Wysocki * @ops: Dock operations to attach to the dependent device. 13621a31013SRafael J. Wysocki * @context: Data to pass to the @ops callbacks and @release. 13721a31013SRafael J. Wysocki * @init: Optional initialization routine to run after setting up context. 13821a31013SRafael J. Wysocki * @release: Optional release routine to run on removal. 139c8f7a62cSLen Brown */ 14021a31013SRafael J. Wysocki static int dock_init_hotplug(struct dock_dependent_device *dd, 14121a31013SRafael J. Wysocki const struct acpi_dock_ops *ops, void *context, 14221a31013SRafael J. Wysocki void (*init)(void *), void (*release)(void *)) 143c8f7a62cSLen Brown { 14421a31013SRafael J. Wysocki int ret = 0; 14521a31013SRafael J. Wysocki 14621a31013SRafael J. Wysocki mutex_lock(&hotplug_lock); 1474ec24065SRafael J. Wysocki if (WARN_ON(dd->hp_context)) { 14821a31013SRafael J. Wysocki ret = -EEXIST; 14921a31013SRafael J. Wysocki } else { 15021a31013SRafael J. Wysocki dd->hp_refcount = 1; 15121a31013SRafael J. Wysocki dd->hp_ops = ops; 15221a31013SRafael J. Wysocki dd->hp_context = context; 15321a31013SRafael J. Wysocki dd->hp_release = release; 1544ec24065SRafael J. Wysocki if (init) 15521a31013SRafael J. Wysocki init(context); 1564ec24065SRafael J. Wysocki } 15721a31013SRafael J. Wysocki mutex_unlock(&hotplug_lock); 15821a31013SRafael J. Wysocki return ret; 159c8f7a62cSLen Brown } 160c8f7a62cSLen Brown 161c8f7a62cSLen Brown /** 16221a31013SRafael J. Wysocki * dock_release_hotplug - Decrement hotplug reference counter of dock device. 16321a31013SRafael J. Wysocki * @dd: Dock-dependent device. 164c8f7a62cSLen Brown * 16521a31013SRafael J. Wysocki * Decrement the reference counter of @dd and if 0, detach its hotplug 16621a31013SRafael J. Wysocki * operations from it, reset its context pointer and run the optional release 16721a31013SRafael J. Wysocki * routine if present. 168c8f7a62cSLen Brown */ 16921a31013SRafael J. Wysocki static void dock_release_hotplug(struct dock_dependent_device *dd) 170c8f7a62cSLen Brown { 17121a31013SRafael J. Wysocki mutex_lock(&hotplug_lock); 17221a31013SRafael J. Wysocki if (dd->hp_context && !--dd->hp_refcount) { 1734ec24065SRafael J. Wysocki void (*release)(void *) = dd->hp_release; 1744ec24065SRafael J. Wysocki void *context = dd->hp_context; 1754ec24065SRafael J. Wysocki 17621a31013SRafael J. Wysocki dd->hp_ops = NULL; 17721a31013SRafael J. Wysocki dd->hp_context = NULL; 17821a31013SRafael J. Wysocki dd->hp_release = NULL; 1794ec24065SRafael J. Wysocki if (release) 18021a31013SRafael J. Wysocki release(context); 1814ec24065SRafael J. Wysocki } 18221a31013SRafael J. Wysocki mutex_unlock(&hotplug_lock); 18321a31013SRafael J. Wysocki } 18421a31013SRafael J. Wysocki 18521a31013SRafael J. Wysocki static void dock_hotplug_event(struct dock_dependent_device *dd, u32 event, 186f09ce741SRafael J. Wysocki enum dock_callback_type cb_type) 18721a31013SRafael J. Wysocki { 18821a31013SRafael J. Wysocki acpi_notify_handler cb = NULL; 18921a31013SRafael J. Wysocki bool run = false; 19021a31013SRafael J. Wysocki 19121a31013SRafael J. Wysocki mutex_lock(&hotplug_lock); 19221a31013SRafael J. Wysocki 19321a31013SRafael J. Wysocki if (dd->hp_context) { 19421a31013SRafael J. Wysocki run = true; 19521a31013SRafael J. Wysocki dd->hp_refcount++; 196f09ce741SRafael J. Wysocki if (dd->hp_ops) { 197f09ce741SRafael J. Wysocki switch (cb_type) { 198f09ce741SRafael J. Wysocki case DOCK_CALL_FIXUP: 199f09ce741SRafael J. Wysocki cb = dd->hp_ops->fixup; 200f09ce741SRafael J. Wysocki break; 201f09ce741SRafael J. Wysocki case DOCK_CALL_UEVENT: 202f09ce741SRafael J. Wysocki cb = dd->hp_ops->uevent; 203f09ce741SRafael J. Wysocki break; 204f09ce741SRafael J. Wysocki default: 205f09ce741SRafael J. Wysocki cb = dd->hp_ops->handler; 206f09ce741SRafael J. Wysocki } 207f09ce741SRafael J. Wysocki } 20821a31013SRafael J. Wysocki } 20921a31013SRafael J. Wysocki 21021a31013SRafael J. Wysocki mutex_unlock(&hotplug_lock); 21121a31013SRafael J. Wysocki 21221a31013SRafael J. Wysocki if (!run) 21321a31013SRafael J. Wysocki return; 21421a31013SRafael J. Wysocki 21521a31013SRafael J. Wysocki if (cb) 21621a31013SRafael J. Wysocki cb(dd->handle, event, dd->hp_context); 21721a31013SRafael J. Wysocki 21821a31013SRafael J. Wysocki dock_release_hotplug(dd); 219c8f7a62cSLen Brown } 220c8f7a62cSLen Brown 221c8f7a62cSLen Brown /** 222c8f7a62cSLen Brown * find_dock_dependent_device - get a device dependent on this dock 223c8f7a62cSLen Brown * @ds: the dock station 224c8f7a62cSLen Brown * @handle: the acpi_handle of the device we want 225c8f7a62cSLen Brown * 226c8f7a62cSLen Brown * iterate over the dependent device list for this dock. If the 227c8f7a62cSLen Brown * dependent device matches the handle, return. 228c8f7a62cSLen Brown */ 229c8f7a62cSLen Brown static struct dock_dependent_device * 230c8f7a62cSLen Brown find_dock_dependent_device(struct dock_station *ds, acpi_handle handle) 231c8f7a62cSLen Brown { 232c8f7a62cSLen Brown struct dock_dependent_device *dd; 233c8f7a62cSLen Brown 234ed633e70SJiang Liu list_for_each_entry(dd, &ds->dependent_devices, list) 235ed633e70SJiang Liu if (handle == dd->handle) 236c8f7a62cSLen Brown return dd; 237ed633e70SJiang Liu 238c8f7a62cSLen Brown return NULL; 239c8f7a62cSLen Brown } 240c8f7a62cSLen Brown 241c8f7a62cSLen Brown /***************************************************************************** 242c8f7a62cSLen Brown * Dock functions * 243c8f7a62cSLen Brown *****************************************************************************/ 244d423c083SJiang Liu static int __init is_battery(acpi_handle handle) 245db350b08SShaohua Li { 246db350b08SShaohua Li struct acpi_device_info *info; 247db350b08SShaohua Li int ret = 1; 248db350b08SShaohua Li 24915b8dd53SBob Moore if (!ACPI_SUCCESS(acpi_get_object_info(handle, &info))) 250db350b08SShaohua Li return 0; 251db350b08SShaohua Li if (!(info->valid & ACPI_VALID_HID)) 252db350b08SShaohua Li ret = 0; 253db350b08SShaohua Li else 25415b8dd53SBob Moore ret = !strcmp("PNP0C0A", info->hardware_id.string); 255db350b08SShaohua Li 25615b8dd53SBob Moore kfree(info); 257db350b08SShaohua Li return ret; 258db350b08SShaohua Li } 259db350b08SShaohua Li 260c9b5471fSJiang Liu /* Check whether ACPI object is an ejectable battery or disk bay */ 261c9b5471fSJiang Liu static bool __init is_ejectable_bay(acpi_handle handle) 262db350b08SShaohua Li { 263c9b5471fSJiang Liu if (acpi_has_method(handle, "_EJ0") && is_battery(handle)) 264c9b5471fSJiang Liu return true; 265747479a3SAlex Chiang 266c9b5471fSJiang Liu return acpi_bay_match(handle); 267db350b08SShaohua Li } 268db350b08SShaohua Li 269c8f7a62cSLen Brown /** 270c8f7a62cSLen Brown * is_dock_device - see if a device is on a dock station 271c8f7a62cSLen Brown * @handle: acpi handle of the device 272c8f7a62cSLen Brown * 273c8f7a62cSLen Brown * If this device is either the dock station itself, 274c8f7a62cSLen Brown * or is a device dependent on the dock station, then it 275c8f7a62cSLen Brown * is a dock device 276c8f7a62cSLen Brown */ 277c8f7a62cSLen Brown int is_dock_device(acpi_handle handle) 278c8f7a62cSLen Brown { 279db350b08SShaohua Li struct dock_station *dock_station; 280db350b08SShaohua Li 281db350b08SShaohua Li if (!dock_station_count) 282c8f7a62cSLen Brown return 0; 283c8f7a62cSLen Brown 284c9b5471fSJiang Liu if (acpi_dock_match(handle)) 285c8f7a62cSLen Brown return 1; 286747479a3SAlex Chiang 287747479a3SAlex Chiang list_for_each_entry(dock_station, &dock_stations, sibling) 288db350b08SShaohua Li if (find_dock_dependent_device(dock_station, handle)) 289db350b08SShaohua Li return 1; 290c8f7a62cSLen Brown 291c8f7a62cSLen Brown return 0; 292c8f7a62cSLen Brown } 293c8f7a62cSLen Brown EXPORT_SYMBOL_GPL(is_dock_device); 294c8f7a62cSLen Brown 295c8f7a62cSLen Brown /** 296c8f7a62cSLen Brown * dock_present - see if the dock station is present. 297c8f7a62cSLen Brown * @ds: the dock station 298c8f7a62cSLen Brown * 299c8f7a62cSLen Brown * execute the _STA method. note that present does not 300c8f7a62cSLen Brown * imply that we are docked. 301c8f7a62cSLen Brown */ 302c8f7a62cSLen Brown static int dock_present(struct dock_station *ds) 303c8f7a62cSLen Brown { 30427663c58SMatthew Wilcox unsigned long long sta; 305c8f7a62cSLen Brown acpi_status status; 306c8f7a62cSLen Brown 307c8f7a62cSLen Brown if (ds) { 308c8f7a62cSLen Brown status = acpi_evaluate_integer(ds->handle, "_STA", NULL, &sta); 309c8f7a62cSLen Brown if (ACPI_SUCCESS(status) && sta) 310c8f7a62cSLen Brown return 1; 311c8f7a62cSLen Brown } 312c8f7a62cSLen Brown return 0; 313c8f7a62cSLen Brown } 314c8f7a62cSLen Brown 315c8f7a62cSLen Brown /** 316c8f7a62cSLen Brown * dock_create_acpi_device - add new devices to acpi 317c8f7a62cSLen Brown * @handle - handle of the device to add 318c8f7a62cSLen Brown * 319c8f7a62cSLen Brown * This function will create a new acpi_device for the given 320c8f7a62cSLen Brown * handle if one does not exist already. This should cause 321c8f7a62cSLen Brown * acpi to scan for drivers for the given devices, and call 322c8f7a62cSLen Brown * matching driver's add routine. 323c8f7a62cSLen Brown */ 324472d963bSJiang Liu static void dock_create_acpi_device(acpi_handle handle) 325c8f7a62cSLen Brown { 326747479a3SAlex Chiang struct acpi_device *device; 327c8f7a62cSLen Brown int ret; 328c8f7a62cSLen Brown 329c8f7a62cSLen Brown if (acpi_bus_get_device(handle, &device)) { 330c8f7a62cSLen Brown /* 331c8f7a62cSLen Brown * no device created for this object, 332c8f7a62cSLen Brown * so we should create one. 333c8f7a62cSLen Brown */ 334b8bd759aSRafael J. Wysocki ret = acpi_bus_scan(handle); 335636458deSRafael J. Wysocki if (ret) 336747479a3SAlex Chiang pr_debug("error adding bus, %x\n", -ret); 337c8f7a62cSLen Brown } 338c8f7a62cSLen Brown } 339c8f7a62cSLen Brown 340c8f7a62cSLen Brown /** 341c8f7a62cSLen Brown * dock_remove_acpi_device - remove the acpi_device struct from acpi 342c8f7a62cSLen Brown * @handle - the handle of the device to remove 343c8f7a62cSLen Brown * 344c8f7a62cSLen Brown * Tell acpi to remove the acpi_device. This should cause any loaded 345c8f7a62cSLen Brown * driver to have it's remove routine called. 346c8f7a62cSLen Brown */ 347c8f7a62cSLen Brown static void dock_remove_acpi_device(acpi_handle handle) 348c8f7a62cSLen Brown { 349c8f7a62cSLen Brown struct acpi_device *device; 350c8f7a62cSLen Brown 351bfee26dbSRafael J. Wysocki if (!acpi_bus_get_device(handle, &device)) 352bfee26dbSRafael J. Wysocki acpi_bus_trim(device); 353c8f7a62cSLen Brown } 354c8f7a62cSLen Brown 355c8f7a62cSLen Brown /** 35637f90877SRafael J. Wysocki * hot_remove_dock_devices - Remove dock station devices. 35737f90877SRafael J. Wysocki * @ds: Dock station. 35837f90877SRafael J. Wysocki */ 35937f90877SRafael J. Wysocki static void hot_remove_dock_devices(struct dock_station *ds) 36037f90877SRafael J. Wysocki { 36137f90877SRafael J. Wysocki struct dock_dependent_device *dd; 36237f90877SRafael J. Wysocki 36337f90877SRafael J. Wysocki /* 36437f90877SRafael J. Wysocki * Walk the list in reverse order so that devices that have been added 36537f90877SRafael J. Wysocki * last are removed first (in case there are some indirect dependencies 36637f90877SRafael J. Wysocki * between them). 36737f90877SRafael J. Wysocki */ 36837f90877SRafael J. Wysocki list_for_each_entry_reverse(dd, &ds->dependent_devices, list) 36937f90877SRafael J. Wysocki dock_hotplug_event(dd, ACPI_NOTIFY_EJECT_REQUEST, false); 37037f90877SRafael J. Wysocki 37137f90877SRafael J. Wysocki list_for_each_entry_reverse(dd, &ds->dependent_devices, list) 37237f90877SRafael J. Wysocki dock_remove_acpi_device(dd->handle); 37337f90877SRafael J. Wysocki } 37437f90877SRafael J. Wysocki 37537f90877SRafael J. Wysocki /** 37637f90877SRafael J. Wysocki * hotplug_dock_devices - Insert devices on a dock station. 377c8f7a62cSLen Brown * @ds: the dock station 37837f90877SRafael J. Wysocki * @event: either bus check or device check request 379c8f7a62cSLen Brown * 380c8f7a62cSLen Brown * Some devices on the dock station need to have drivers called 381c8f7a62cSLen Brown * to perform hotplug operations after a dock event has occurred. 382c8f7a62cSLen Brown * Traverse the list of dock devices that have registered a 383c8f7a62cSLen Brown * hotplug handler, and call the handler. 384c8f7a62cSLen Brown */ 385c8f7a62cSLen Brown static void hotplug_dock_devices(struct dock_station *ds, u32 event) 386c8f7a62cSLen Brown { 387c8f7a62cSLen Brown struct dock_dependent_device *dd; 388c8f7a62cSLen Brown 389f09ce741SRafael J. Wysocki /* Call driver specific post-dock fixups. */ 390f09ce741SRafael J. Wysocki list_for_each_entry(dd, &ds->dependent_devices, list) 391f09ce741SRafael J. Wysocki dock_hotplug_event(dd, event, DOCK_CALL_FIXUP); 392f09ce741SRafael J. Wysocki 39337f90877SRafael J. Wysocki /* Call driver specific hotplug functions. */ 39421a31013SRafael J. Wysocki list_for_each_entry(dd, &ds->dependent_devices, list) 395f09ce741SRafael J. Wysocki dock_hotplug_event(dd, event, DOCK_CALL_HANDLER); 396c8f7a62cSLen Brown 397c8f7a62cSLen Brown /* 39837f90877SRafael J. Wysocki * Now make sure that an acpi_device is created for each dependent 39937f90877SRafael J. Wysocki * device. That will cause scan handlers to be attached to device 40037f90877SRafael J. Wysocki * objects or acpi_drivers to be stopped/started if they are present. 401c8f7a62cSLen Brown */ 40237f90877SRafael J. Wysocki list_for_each_entry(dd, &ds->dependent_devices, list) 403c8f7a62cSLen Brown dock_create_acpi_device(dd->handle); 404c8f7a62cSLen Brown } 405c8f7a62cSLen Brown 406c8f7a62cSLen Brown static void dock_event(struct dock_station *ds, u32 event, int num) 407c8f7a62cSLen Brown { 408db350b08SShaohua Li struct device *dev = &ds->dock_device->dev; 40966b56821SHolger Macht char event_string[13]; 41079a8f70bSKristen Carlson Accardi char *envp[] = { event_string, NULL }; 4111253f7aaSShaohua Li struct dock_dependent_device *dd; 41279a8f70bSKristen Carlson Accardi 41379a8f70bSKristen Carlson Accardi if (num == UNDOCK_EVENT) 41466b56821SHolger Macht sprintf(event_string, "EVENT=undock"); 41579a8f70bSKristen Carlson Accardi else 41666b56821SHolger Macht sprintf(event_string, "EVENT=dock"); 41779a8f70bSKristen Carlson Accardi 4185669021eSKristen Carlson Accardi /* 4198ea86e0bSKristen Carlson Accardi * Indicate that the status of the dock station has 4208ea86e0bSKristen Carlson Accardi * changed. 4215669021eSKristen Carlson Accardi */ 4221253f7aaSShaohua Li if (num == DOCK_EVENT) 4231253f7aaSShaohua Li kobject_uevent_env(&dev->kobj, KOBJ_CHANGE, envp); 4241253f7aaSShaohua Li 42521a31013SRafael J. Wysocki list_for_each_entry(dd, &ds->dependent_devices, list) 426f09ce741SRafael J. Wysocki dock_hotplug_event(dd, event, DOCK_CALL_UEVENT); 427747479a3SAlex Chiang 4281253f7aaSShaohua Li if (num != DOCK_EVENT) 42979a8f70bSKristen Carlson Accardi kobject_uevent_env(&dev->kobj, KOBJ_CHANGE, envp); 430c8f7a62cSLen Brown } 431c8f7a62cSLen Brown 432c8f7a62cSLen Brown /** 433c8f7a62cSLen Brown * handle_dock - handle a dock event 434c8f7a62cSLen Brown * @ds: the dock station 435c8f7a62cSLen Brown * @dock: to dock, or undock - that is the question 436c8f7a62cSLen Brown * 437c8f7a62cSLen Brown * Execute the _DCK method in response to an acpi event 438c8f7a62cSLen Brown */ 439c8f7a62cSLen Brown static void handle_dock(struct dock_station *ds, int dock) 440c8f7a62cSLen Brown { 441c8f7a62cSLen Brown acpi_status status; 442c8f7a62cSLen Brown struct acpi_object_list arg_list; 443c8f7a62cSLen Brown union acpi_object arg; 444c8f7a62cSLen Brown struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 445c8f7a62cSLen Brown 446cd73018fSToshi Kani acpi_handle_info(ds->handle, "%s\n", dock ? "docking" : "undocking"); 447c8f7a62cSLen Brown 448c8f7a62cSLen Brown /* _DCK method has one argument */ 449c8f7a62cSLen Brown arg_list.count = 1; 450c8f7a62cSLen Brown arg_list.pointer = &arg; 451c8f7a62cSLen Brown arg.type = ACPI_TYPE_INTEGER; 452c8f7a62cSLen Brown arg.integer.value = dock; 453c8f7a62cSLen Brown status = acpi_evaluate_object(ds->handle, "_DCK", &arg_list, &buffer); 454db350b08SShaohua Li if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) 455cd73018fSToshi Kani acpi_handle_err(ds->handle, "Failed to execute _DCK (0x%x)\n", 456cd73018fSToshi Kani status); 4570a918a94SThomas Renninger 458c8f7a62cSLen Brown kfree(buffer.pointer); 459c8f7a62cSLen Brown } 460c8f7a62cSLen Brown 461c8f7a62cSLen Brown static inline void dock(struct dock_station *ds) 462c8f7a62cSLen Brown { 463c8f7a62cSLen Brown handle_dock(ds, 1); 464c8f7a62cSLen Brown } 465c8f7a62cSLen Brown 466c8f7a62cSLen Brown static inline void undock(struct dock_station *ds) 467c8f7a62cSLen Brown { 468c8f7a62cSLen Brown handle_dock(ds, 0); 469c8f7a62cSLen Brown } 470c8f7a62cSLen Brown 471c8f7a62cSLen Brown static inline void begin_dock(struct dock_station *ds) 472c8f7a62cSLen Brown { 473c8f7a62cSLen Brown ds->flags |= DOCK_DOCKING; 474c8f7a62cSLen Brown } 475c8f7a62cSLen Brown 476c8f7a62cSLen Brown static inline void complete_dock(struct dock_station *ds) 477c8f7a62cSLen Brown { 478c8f7a62cSLen Brown ds->flags &= ~(DOCK_DOCKING); 479c8f7a62cSLen Brown ds->last_dock_time = jiffies; 480c8f7a62cSLen Brown } 481c8f7a62cSLen Brown 482a0cd35fdSKristen Carlson Accardi static inline void begin_undock(struct dock_station *ds) 483a0cd35fdSKristen Carlson Accardi { 484a0cd35fdSKristen Carlson Accardi ds->flags |= DOCK_UNDOCKING; 485a0cd35fdSKristen Carlson Accardi } 486a0cd35fdSKristen Carlson Accardi 487a0cd35fdSKristen Carlson Accardi static inline void complete_undock(struct dock_station *ds) 488a0cd35fdSKristen Carlson Accardi { 489a0cd35fdSKristen Carlson Accardi ds->flags &= ~(DOCK_UNDOCKING); 490a0cd35fdSKristen Carlson Accardi } 491a0cd35fdSKristen Carlson Accardi 492c8f7a62cSLen Brown /** 493c8f7a62cSLen Brown * dock_in_progress - see if we are in the middle of handling a dock event 494c8f7a62cSLen Brown * @ds: the dock station 495c8f7a62cSLen Brown * 496c8f7a62cSLen Brown * Sometimes while docking, false dock events can be sent to the driver 497c8f7a62cSLen Brown * because good connections aren't made or some other reason. Ignore these 498c8f7a62cSLen Brown * if we are in the middle of doing something. 499c8f7a62cSLen Brown */ 500c8f7a62cSLen Brown static int dock_in_progress(struct dock_station *ds) 501c8f7a62cSLen Brown { 502c8f7a62cSLen Brown if ((ds->flags & DOCK_DOCKING) || 503c8f7a62cSLen Brown time_before(jiffies, (ds->last_dock_time + HZ))) 504c8f7a62cSLen Brown return 1; 505c8f7a62cSLen Brown return 0; 506c8f7a62cSLen Brown } 507c8f7a62cSLen Brown 508c8f7a62cSLen Brown /** 509c8f7a62cSLen Brown * register_hotplug_dock_device - register a hotplug function 510c8f7a62cSLen Brown * @handle: the handle of the device 5111253f7aaSShaohua Li * @ops: handlers to call after docking 512c8f7a62cSLen Brown * @context: device specific data 51321a31013SRafael J. Wysocki * @init: Optional initialization routine to run after registration 51421a31013SRafael J. Wysocki * @release: Optional release routine to run on unregistration 515c8f7a62cSLen Brown * 516c8f7a62cSLen Brown * If a driver would like to perform a hotplug operation after a dock 517c8f7a62cSLen Brown * event, they can register an acpi_notifiy_handler to be called by 518c8f7a62cSLen Brown * the dock driver after _DCK is executed. 519c8f7a62cSLen Brown */ 52021a31013SRafael J. Wysocki int register_hotplug_dock_device(acpi_handle handle, 52121a31013SRafael J. Wysocki const struct acpi_dock_ops *ops, void *context, 52221a31013SRafael J. Wysocki void (*init)(void *), void (*release)(void *)) 523c8f7a62cSLen Brown { 524c8f7a62cSLen Brown struct dock_dependent_device *dd; 525db350b08SShaohua Li struct dock_station *dock_station; 52661b83695SShaohua Li int ret = -EINVAL; 527c8f7a62cSLen Brown 52821a31013SRafael J. Wysocki if (WARN_ON(!context)) 52921a31013SRafael J. Wysocki return -EINVAL; 53021a31013SRafael J. Wysocki 531db350b08SShaohua Li if (!dock_station_count) 532c8f7a62cSLen Brown return -ENODEV; 533c8f7a62cSLen Brown 534c8f7a62cSLen Brown /* 535c8f7a62cSLen Brown * make sure this handle is for a device dependent on the dock, 536c8f7a62cSLen Brown * this would include the dock station itself 537c8f7a62cSLen Brown */ 53850d716e4SAlex Chiang list_for_each_entry(dock_station, &dock_stations, sibling) { 53961b83695SShaohua Li /* 54061b83695SShaohua Li * An ATA bay can be in a dock and itself can be ejected 5413ad2f3fbSDaniel Mack * separately, so there are two 'dock stations' which need the 54261b83695SShaohua Li * ops 54361b83695SShaohua Li */ 544c8f7a62cSLen Brown dd = find_dock_dependent_device(dock_station, handle); 54521a31013SRafael J. Wysocki if (dd && !dock_init_hotplug(dd, ops, context, init, release)) 54661b83695SShaohua Li ret = 0; 547c8f7a62cSLen Brown } 548c8f7a62cSLen Brown 54961b83695SShaohua Li return ret; 550c8f7a62cSLen Brown } 551c8f7a62cSLen Brown EXPORT_SYMBOL_GPL(register_hotplug_dock_device); 552c8f7a62cSLen Brown 553c8f7a62cSLen Brown /** 554c8f7a62cSLen Brown * unregister_hotplug_dock_device - remove yourself from the hotplug list 555c8f7a62cSLen Brown * @handle: the acpi handle of the device 556c8f7a62cSLen Brown */ 557c8f7a62cSLen Brown void unregister_hotplug_dock_device(acpi_handle handle) 558c8f7a62cSLen Brown { 559c8f7a62cSLen Brown struct dock_dependent_device *dd; 560db350b08SShaohua Li struct dock_station *dock_station; 561c8f7a62cSLen Brown 562db350b08SShaohua Li if (!dock_station_count) 563c8f7a62cSLen Brown return; 564c8f7a62cSLen Brown 56550d716e4SAlex Chiang list_for_each_entry(dock_station, &dock_stations, sibling) { 566c8f7a62cSLen Brown dd = find_dock_dependent_device(dock_station, handle); 567c8f7a62cSLen Brown if (dd) 56821a31013SRafael J. Wysocki dock_release_hotplug(dd); 569c8f7a62cSLen Brown } 570db350b08SShaohua Li } 571c8f7a62cSLen Brown EXPORT_SYMBOL_GPL(unregister_hotplug_dock_device); 572c8f7a62cSLen Brown 573c8f7a62cSLen Brown /** 574c80fdbe8Sbrandon@ifup.org * handle_eject_request - handle an undock request checking for error conditions 575c80fdbe8Sbrandon@ifup.org * 576c80fdbe8Sbrandon@ifup.org * Check to make sure the dock device is still present, then undock and 577c80fdbe8Sbrandon@ifup.org * hotremove all the devices that may need removing. 578c80fdbe8Sbrandon@ifup.org */ 579c80fdbe8Sbrandon@ifup.org static int handle_eject_request(struct dock_station *ds, u32 event) 580c80fdbe8Sbrandon@ifup.org { 581c80fdbe8Sbrandon@ifup.org if (dock_in_progress(ds)) 582c80fdbe8Sbrandon@ifup.org return -EBUSY; 583c80fdbe8Sbrandon@ifup.org 584c80fdbe8Sbrandon@ifup.org /* 585c80fdbe8Sbrandon@ifup.org * here we need to generate the undock 586c80fdbe8Sbrandon@ifup.org * event prior to actually doing the undock 587c80fdbe8Sbrandon@ifup.org * so that the device struct still exists. 588afd7301dSHolger Macht * Also, even send the dock event if the 589afd7301dSHolger Macht * device is not present anymore 590c80fdbe8Sbrandon@ifup.org */ 591c80fdbe8Sbrandon@ifup.org dock_event(ds, event, UNDOCK_EVENT); 592afd7301dSHolger Macht 59337f90877SRafael J. Wysocki hot_remove_dock_devices(ds); 594c80fdbe8Sbrandon@ifup.org undock(ds); 595c9b5471fSJiang Liu acpi_evaluate_lck(ds->handle, 0); 596c9b5471fSJiang Liu acpi_evaluate_ej0(ds->handle); 597c80fdbe8Sbrandon@ifup.org if (dock_present(ds)) { 598cd73018fSToshi Kani acpi_handle_err(ds->handle, "Unable to undock!\n"); 599c80fdbe8Sbrandon@ifup.org return -EBUSY; 600c80fdbe8Sbrandon@ifup.org } 601a0cd35fdSKristen Carlson Accardi complete_undock(ds); 602c80fdbe8Sbrandon@ifup.org return 0; 603c80fdbe8Sbrandon@ifup.org } 604c80fdbe8Sbrandon@ifup.org 605c80fdbe8Sbrandon@ifup.org /** 606c8f7a62cSLen Brown * dock_notify - act upon an acpi dock notification 60759401cccSRafael J. Wysocki * @ds: dock station 608c8f7a62cSLen Brown * @event: the acpi event 609c8f7a62cSLen Brown * 610c8f7a62cSLen Brown * If we are notified to dock, then check to see if the dock is 611c8f7a62cSLen Brown * present and then dock. Notify all drivers of the dock event, 612c80fdbe8Sbrandon@ifup.org * and then hotplug and devices that may need hotplugging. 613c8f7a62cSLen Brown */ 61459401cccSRafael J. Wysocki static void dock_notify(struct dock_station *ds, u32 event) 615c8f7a62cSLen Brown { 61659401cccSRafael J. Wysocki acpi_handle handle = ds->handle; 61759401cccSRafael J. Wysocki struct acpi_device *ad; 618db350b08SShaohua Li int surprise_removal = 0; 619c8f7a62cSLen Brown 620db350b08SShaohua Li /* 621db350b08SShaohua Li * According to acpi spec 3.0a, if a DEVICE_CHECK notification 622db350b08SShaohua Li * is sent and _DCK is present, it is assumed to mean an undock 623db350b08SShaohua Li * request. 624db350b08SShaohua Li */ 625db350b08SShaohua Li if ((ds->flags & DOCK_IS_DOCK) && event == ACPI_NOTIFY_DEVICE_CHECK) 626db350b08SShaohua Li event = ACPI_NOTIFY_EJECT_REQUEST; 627db350b08SShaohua Li 628db350b08SShaohua Li /* 629db350b08SShaohua Li * dock station: BUS_CHECK - docked or surprise removal 630db350b08SShaohua Li * DEVICE_CHECK - undocked 631db350b08SShaohua Li * other device: BUS_CHECK/DEVICE_CHECK - added or surprise removal 632db350b08SShaohua Li * 633db350b08SShaohua Li * To simplify event handling, dock dependent device handler always 634db350b08SShaohua Li * get ACPI_NOTIFY_BUS_CHECK/ACPI_NOTIFY_DEVICE_CHECK for add and 635db350b08SShaohua Li * ACPI_NOTIFY_EJECT_REQUEST for removal 636db350b08SShaohua Li */ 637c8f7a62cSLen Brown switch (event) { 638c8f7a62cSLen Brown case ACPI_NOTIFY_BUS_CHECK: 639db350b08SShaohua Li case ACPI_NOTIFY_DEVICE_CHECK: 64059401cccSRafael J. Wysocki if (!dock_in_progress(ds) && acpi_bus_get_device(handle, &ad)) { 641c8f7a62cSLen Brown begin_dock(ds); 642c8f7a62cSLen Brown dock(ds); 643c8f7a62cSLen Brown if (!dock_present(ds)) { 644cd73018fSToshi Kani acpi_handle_err(handle, "Unable to dock!\n"); 6458b59560aSShaohua Li complete_dock(ds); 646c8f7a62cSLen Brown break; 647c8f7a62cSLen Brown } 648c8f7a62cSLen Brown hotplug_dock_devices(ds, event); 649c8f7a62cSLen Brown complete_dock(ds); 650c8f7a62cSLen Brown dock_event(ds, event, DOCK_EVENT); 651c9b5471fSJiang Liu acpi_evaluate_lck(ds->handle, 1); 6523a37898dSLin Ming acpi_update_all_gpes(); 653c8f7a62cSLen Brown break; 654db350b08SShaohua Li } 655db350b08SShaohua Li if (dock_present(ds) || dock_in_progress(ds)) 656db350b08SShaohua Li break; 657db350b08SShaohua Li /* This is a surprise removal */ 658db350b08SShaohua Li surprise_removal = 1; 659db350b08SShaohua Li event = ACPI_NOTIFY_EJECT_REQUEST; 660db350b08SShaohua Li /* Fall back */ 661c8f7a62cSLen Brown case ACPI_NOTIFY_EJECT_REQUEST: 662a0cd35fdSKristen Carlson Accardi begin_undock(ds); 663f730ae18SShaohua Li if ((immediate_undock && !(ds->flags & DOCK_IS_ATA)) 664f730ae18SShaohua Li || surprise_removal) 665c80fdbe8Sbrandon@ifup.org handle_eject_request(ds, event); 666a0cd35fdSKristen Carlson Accardi else 667a0cd35fdSKristen Carlson Accardi dock_event(ds, event, UNDOCK_EVENT); 668c8f7a62cSLen Brown break; 669c8f7a62cSLen Brown default: 670cd73018fSToshi Kani acpi_handle_err(handle, "Unknown dock event %d\n", event); 671c8f7a62cSLen Brown } 672c8f7a62cSLen Brown } 673c8f7a62cSLen Brown 67419cd847aSZhang Rui struct dock_data { 67519cd847aSZhang Rui struct dock_station *ds; 67659401cccSRafael J. Wysocki u32 event; 67719cd847aSZhang Rui }; 67819cd847aSZhang Rui 67919cd847aSZhang Rui static void acpi_dock_deferred_cb(void *context) 68019cd847aSZhang Rui { 681747479a3SAlex Chiang struct dock_data *data = context; 68219cd847aSZhang Rui 6833757b948SRafael J. Wysocki acpi_scan_lock_acquire(); 68459401cccSRafael J. Wysocki dock_notify(data->ds, data->event); 6853757b948SRafael J. Wysocki acpi_scan_lock_release(); 68619cd847aSZhang Rui kfree(data); 68719cd847aSZhang Rui } 68819cd847aSZhang Rui 68959401cccSRafael J. Wysocki static void dock_notify_handler(acpi_handle handle, u32 event, void *data) 6906bd00a61SShaohua Li { 69159401cccSRafael J. Wysocki struct dock_data *dd; 6926bd00a61SShaohua Li 6936bd00a61SShaohua Li if (event != ACPI_NOTIFY_BUS_CHECK && event != ACPI_NOTIFY_DEVICE_CHECK 6946bd00a61SShaohua Li && event != ACPI_NOTIFY_EJECT_REQUEST) 69559401cccSRafael J. Wysocki return; 69619cd847aSZhang Rui 697747479a3SAlex Chiang dd = kmalloc(sizeof(*dd), GFP_KERNEL); 69859401cccSRafael J. Wysocki if (dd) { 69959401cccSRafael J. Wysocki acpi_status status; 7003757b948SRafael J. Wysocki 70159401cccSRafael J. Wysocki dd->ds = data; 702747479a3SAlex Chiang dd->event = event; 70359401cccSRafael J. Wysocki status = acpi_os_hotplug_execute(acpi_dock_deferred_cb, dd); 7043757b948SRafael J. Wysocki if (ACPI_FAILURE(status)) 7053757b948SRafael J. Wysocki kfree(dd); 7066bd00a61SShaohua Li } 7076bd00a61SShaohua Li } 7083757b948SRafael J. Wysocki 709c8f7a62cSLen Brown /** 710c8f7a62cSLen Brown * find_dock_devices - find devices on the dock station 711c8f7a62cSLen Brown * @handle: the handle of the device we are examining 712c8f7a62cSLen Brown * @lvl: unused 713c8f7a62cSLen Brown * @context: the dock station private data 714c8f7a62cSLen Brown * @rv: unused 715c8f7a62cSLen Brown * 716c8f7a62cSLen Brown * This function is called by acpi_walk_namespace. It will 717c8f7a62cSLen Brown * check to see if an object has an _EJD method. If it does, then it 718c8f7a62cSLen Brown * will see if it is dependent on the dock station. 719c8f7a62cSLen Brown */ 72096c0a4d4SRafael J. Wysocki static acpi_status __init find_dock_devices(acpi_handle handle, u32 lvl, 72196c0a4d4SRafael J. Wysocki void *context, void **rv) 722c8f7a62cSLen Brown { 72350dd0969SJan Engelhardt struct dock_station *ds = context; 72496c0a4d4SRafael J. Wysocki acpi_handle ejd = NULL; 725c8f7a62cSLen Brown 72696c0a4d4SRafael J. Wysocki acpi_bus_get_ejd(handle, &ejd); 72796c0a4d4SRafael J. Wysocki if (ejd == ds->handle) 728f69cfdd2SAlex Chiang add_dock_dependent_device(ds, handle); 729f69cfdd2SAlex Chiang 730c8f7a62cSLen Brown return AE_OK; 731c8f7a62cSLen Brown } 732c8f7a62cSLen Brown 733c80fdbe8Sbrandon@ifup.org /* 734c80fdbe8Sbrandon@ifup.org * show_docked - read method for "docked" file in sysfs 735c80fdbe8Sbrandon@ifup.org */ 736c80fdbe8Sbrandon@ifup.org static ssize_t show_docked(struct device *dev, 737c80fdbe8Sbrandon@ifup.org struct device_attribute *attr, char *buf) 738c80fdbe8Sbrandon@ifup.org { 739fc5a9f88SHolger Macht struct acpi_device *tmp; 740fc5a9f88SHolger Macht 741fe06fba2SAlex Chiang struct dock_station *dock_station = dev->platform_data; 742c80fdbe8Sbrandon@ifup.org 74302df7349SYasuaki Ishimatsu if (!acpi_bus_get_device(dock_station->handle, &tmp)) 744fc5a9f88SHolger Macht return snprintf(buf, PAGE_SIZE, "1\n"); 745fc5a9f88SHolger Macht return snprintf(buf, PAGE_SIZE, "0\n"); 746c80fdbe8Sbrandon@ifup.org } 747e5685b9dSAdrian Bunk static DEVICE_ATTR(docked, S_IRUGO, show_docked, NULL); 748c80fdbe8Sbrandon@ifup.org 749c80fdbe8Sbrandon@ifup.org /* 750a0cd35fdSKristen Carlson Accardi * show_flags - read method for flags file in sysfs 751a0cd35fdSKristen Carlson Accardi */ 752a0cd35fdSKristen Carlson Accardi static ssize_t show_flags(struct device *dev, 753a0cd35fdSKristen Carlson Accardi struct device_attribute *attr, char *buf) 754a0cd35fdSKristen Carlson Accardi { 755fe06fba2SAlex Chiang struct dock_station *dock_station = dev->platform_data; 756a0cd35fdSKristen Carlson Accardi return snprintf(buf, PAGE_SIZE, "%d\n", dock_station->flags); 757a0cd35fdSKristen Carlson Accardi 758a0cd35fdSKristen Carlson Accardi } 759e5685b9dSAdrian Bunk static DEVICE_ATTR(flags, S_IRUGO, show_flags, NULL); 760a0cd35fdSKristen Carlson Accardi 761a0cd35fdSKristen Carlson Accardi /* 762c80fdbe8Sbrandon@ifup.org * write_undock - write method for "undock" file in sysfs 763c80fdbe8Sbrandon@ifup.org */ 764c80fdbe8Sbrandon@ifup.org static ssize_t write_undock(struct device *dev, struct device_attribute *attr, 765c80fdbe8Sbrandon@ifup.org const char *buf, size_t count) 766c80fdbe8Sbrandon@ifup.org { 767c80fdbe8Sbrandon@ifup.org int ret; 768fe06fba2SAlex Chiang struct dock_station *dock_station = dev->platform_data; 769c80fdbe8Sbrandon@ifup.org 770c80fdbe8Sbrandon@ifup.org if (!count) 771c80fdbe8Sbrandon@ifup.org return -EINVAL; 772c80fdbe8Sbrandon@ifup.org 7738112006fSRafael J. Wysocki acpi_scan_lock_acquire(); 7749171f834SHolger Macht begin_undock(dock_station); 775c80fdbe8Sbrandon@ifup.org ret = handle_eject_request(dock_station, ACPI_NOTIFY_EJECT_REQUEST); 7768112006fSRafael J. Wysocki acpi_scan_lock_release(); 777c80fdbe8Sbrandon@ifup.org return ret ? ret: count; 778c80fdbe8Sbrandon@ifup.org } 779e5685b9dSAdrian Bunk static DEVICE_ATTR(undock, S_IWUSR, NULL, write_undock); 780c80fdbe8Sbrandon@ifup.org 781ac122bb6SIlya A. Volynets-Evenbakh /* 782ac122bb6SIlya A. Volynets-Evenbakh * show_dock_uid - read method for "uid" file in sysfs 783ac122bb6SIlya A. Volynets-Evenbakh */ 784ac122bb6SIlya A. Volynets-Evenbakh static ssize_t show_dock_uid(struct device *dev, 785ac122bb6SIlya A. Volynets-Evenbakh struct device_attribute *attr, char *buf) 786ac122bb6SIlya A. Volynets-Evenbakh { 78727663c58SMatthew Wilcox unsigned long long lbuf; 788fe06fba2SAlex Chiang struct dock_station *dock_station = dev->platform_data; 78938ff4ffcSKristen Carlson Accardi acpi_status status = acpi_evaluate_integer(dock_station->handle, 79038ff4ffcSKristen Carlson Accardi "_UID", NULL, &lbuf); 79138ff4ffcSKristen Carlson Accardi if (ACPI_FAILURE(status)) 792ac122bb6SIlya A. Volynets-Evenbakh return 0; 79338ff4ffcSKristen Carlson Accardi 79427663c58SMatthew Wilcox return snprintf(buf, PAGE_SIZE, "%llx\n", lbuf); 795ac122bb6SIlya A. Volynets-Evenbakh } 796e5685b9dSAdrian Bunk static DEVICE_ATTR(uid, S_IRUGO, show_dock_uid, NULL); 797ac122bb6SIlya A. Volynets-Evenbakh 7988652b00fSShaohua Li static ssize_t show_dock_type(struct device *dev, 7998652b00fSShaohua Li struct device_attribute *attr, char *buf) 8008652b00fSShaohua Li { 801fe06fba2SAlex Chiang struct dock_station *dock_station = dev->platform_data; 8028652b00fSShaohua Li char *type; 8038652b00fSShaohua Li 8048652b00fSShaohua Li if (dock_station->flags & DOCK_IS_DOCK) 8058652b00fSShaohua Li type = "dock_station"; 8068652b00fSShaohua Li else if (dock_station->flags & DOCK_IS_ATA) 8078652b00fSShaohua Li type = "ata_bay"; 8088652b00fSShaohua Li else if (dock_station->flags & DOCK_IS_BAT) 8098652b00fSShaohua Li type = "battery_bay"; 8108652b00fSShaohua Li else 8118652b00fSShaohua Li type = "unknown"; 8128652b00fSShaohua Li 8138652b00fSShaohua Li return snprintf(buf, PAGE_SIZE, "%s\n", type); 8148652b00fSShaohua Li } 8158652b00fSShaohua Li static DEVICE_ATTR(type, S_IRUGO, show_dock_type, NULL); 8168652b00fSShaohua Li 8175f46c2f2SAlex Chiang static struct attribute *dock_attributes[] = { 8185f46c2f2SAlex Chiang &dev_attr_docked.attr, 8195f46c2f2SAlex Chiang &dev_attr_flags.attr, 8205f46c2f2SAlex Chiang &dev_attr_undock.attr, 8215f46c2f2SAlex Chiang &dev_attr_uid.attr, 8225f46c2f2SAlex Chiang &dev_attr_type.attr, 8235f46c2f2SAlex Chiang NULL 8245f46c2f2SAlex Chiang }; 8255f46c2f2SAlex Chiang 8265f46c2f2SAlex Chiang static struct attribute_group dock_attribute_group = { 8275f46c2f2SAlex Chiang .attrs = dock_attributes 8285f46c2f2SAlex Chiang }; 8295f46c2f2SAlex Chiang 830c8f7a62cSLen Brown /** 831c8f7a62cSLen Brown * dock_add - add a new dock station 832c8f7a62cSLen Brown * @handle: the dock station handle 833c8f7a62cSLen Brown * 834c8f7a62cSLen Brown * allocated and initialize a new dock station device. Find all devices 835c8f7a62cSLen Brown * that are on the dock station, and register for dock event notifications. 836c8f7a62cSLen Brown */ 837d38a5edfSUwe Kleine-König static int __init dock_add(acpi_handle handle) 838c8f7a62cSLen Brown { 8392efbca4dSRafael J. Wysocki struct dock_station *dock_station, ds = { NULL, }; 840747479a3SAlex Chiang struct platform_device *dd; 84159401cccSRafael J. Wysocki acpi_status status; 8422efbca4dSRafael J. Wysocki int ret; 843c8f7a62cSLen Brown 8442efbca4dSRafael J. Wysocki dd = platform_device_register_data(NULL, "dock", dock_station_count, 8452efbca4dSRafael J. Wysocki &ds, sizeof(ds)); 846747479a3SAlex Chiang if (IS_ERR(dd)) 847747479a3SAlex Chiang return PTR_ERR(dd); 8489751cb72SAlex Chiang 849747479a3SAlex Chiang dock_station = dd->dev.platform_data; 850747479a3SAlex Chiang 851c8f7a62cSLen Brown dock_station->handle = handle; 852747479a3SAlex Chiang dock_station->dock_device = dd; 853c8f7a62cSLen Brown dock_station->last_dock_time = jiffies - HZ; 854c8f7a62cSLen Brown 855747479a3SAlex Chiang INIT_LIST_HEAD(&dock_station->sibling); 856747479a3SAlex Chiang INIT_LIST_HEAD(&dock_station->dependent_devices); 857a0cd35fdSKristen Carlson Accardi 8589ef2a9a9SKristen Carlson Accardi /* we want the dock device to send uevents */ 859747479a3SAlex Chiang dev_set_uevent_suppress(&dd->dev, 0); 8609ef2a9a9SKristen Carlson Accardi 861c9b5471fSJiang Liu if (acpi_dock_match(handle)) 862db350b08SShaohua Li dock_station->flags |= DOCK_IS_DOCK; 863c9b5471fSJiang Liu if (acpi_ata_match(handle)) 864db350b08SShaohua Li dock_station->flags |= DOCK_IS_ATA; 865db350b08SShaohua Li if (is_battery(handle)) 866db350b08SShaohua Li dock_station->flags |= DOCK_IS_BAT; 867db350b08SShaohua Li 868747479a3SAlex Chiang ret = sysfs_create_group(&dd->dev.kobj, &dock_attribute_group); 8698652b00fSShaohua Li if (ret) 8705f46c2f2SAlex Chiang goto err_unregister; 871671adbecSKristen Carlson Accardi 872c8f7a62cSLen Brown /* Find dependent devices */ 873c8f7a62cSLen Brown acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, 8742263576cSLin Ming ACPI_UINT32_MAX, find_dock_devices, NULL, 8752263576cSLin Ming dock_station, NULL); 876c8f7a62cSLen Brown 877c8f7a62cSLen Brown /* add the dock station as a device dependent on itself */ 878f69cfdd2SAlex Chiang ret = add_dock_dependent_device(dock_station, handle); 879f69cfdd2SAlex Chiang if (ret) 8805f46c2f2SAlex Chiang goto err_rmgroup; 881c8f7a62cSLen Brown 88259401cccSRafael J. Wysocki status = acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY, 88359401cccSRafael J. Wysocki dock_notify_handler, dock_station); 88459401cccSRafael J. Wysocki if (ACPI_FAILURE(status)) 88559401cccSRafael J. Wysocki goto err_rmgroup; 88659401cccSRafael J. Wysocki 887db350b08SShaohua Li dock_station_count++; 88850d716e4SAlex Chiang list_add(&dock_station->sibling, &dock_stations); 889c8f7a62cSLen Brown return 0; 890c8f7a62cSLen Brown 8915f46c2f2SAlex Chiang err_rmgroup: 892a30c4c5eSRafael J. Wysocki remove_dock_dependent_devices(dock_station); 893747479a3SAlex Chiang sysfs_remove_group(&dd->dev.kobj, &dock_attribute_group); 8945f46c2f2SAlex Chiang err_unregister: 895747479a3SAlex Chiang platform_device_unregister(dd); 896cd73018fSToshi Kani acpi_handle_err(handle, "%s encountered error %d\n", __func__, ret); 897c8f7a62cSLen Brown return ret; 898c8f7a62cSLen Brown } 899c8f7a62cSLen Brown 900c8f7a62cSLen Brown /** 9018ab0ab25SToshi Kani * find_dock_and_bay - look for dock stations and bays 902c8f7a62cSLen Brown * @handle: acpi handle of a device 903c8f7a62cSLen Brown * @lvl: unused 9048ab0ab25SToshi Kani * @context: unused 905c8f7a62cSLen Brown * @rv: unused 906c8f7a62cSLen Brown * 9078ab0ab25SToshi Kani * This is called by acpi_walk_namespace to look for dock stations and bays. 908c8f7a62cSLen Brown */ 909d38a5edfSUwe Kleine-König static __init acpi_status 9108ab0ab25SToshi Kani find_dock_and_bay(acpi_handle handle, u32 lvl, void *context, void **rv) 911c8f7a62cSLen Brown { 912c9b5471fSJiang Liu if (acpi_dock_match(handle) || is_ejectable_bay(handle)) 9131ee4d61fSZhang Rui dock_add(handle); 914747479a3SAlex Chiang 9151ee4d61fSZhang Rui return AE_OK; 916c8f7a62cSLen Brown } 917c8f7a62cSLen Brown 9182ce65fe8SRafael J. Wysocki void __init acpi_dock_init(void) 919c8f7a62cSLen Brown { 920816c2edaSLen Brown if (acpi_disabled) 9212ce65fe8SRafael J. Wysocki return; 922816c2edaSLen Brown 9238ab0ab25SToshi Kani /* look for dock stations and bays */ 924c8f7a62cSLen Brown acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, 9258ab0ab25SToshi Kani ACPI_UINT32_MAX, find_dock_and_bay, NULL, NULL, NULL); 926c8f7a62cSLen Brown 927db350b08SShaohua Li if (!dock_station_count) { 928cd73018fSToshi Kani pr_info(PREFIX "No dock devices found.\n"); 9292ce65fe8SRafael J. Wysocki return; 930db350b08SShaohua Li } 931c8f7a62cSLen Brown 932cd73018fSToshi Kani pr_info(PREFIX "%s: %d docks/bays found\n", 933db350b08SShaohua Li ACPI_DOCK_DRIVER_DESCRIPTION, dock_station_count); 934c8f7a62cSLen Brown } 935