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 363f9eed5cSRashika #include "internal.h" 373f9eed5cSRashika 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; 753b52b21fSRafael J. Wysocki struct acpi_device *adev; 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 1013b52b21fSRafael J. Wysocki * @ds: Dock station. 1023b52b21fSRafael J. Wysocki * @adev: Dependent ACPI device object. 103c8f7a62cSLen Brown * 104f69cfdd2SAlex Chiang * Add the dependent device to the dock's dependent device list. 105c8f7a62cSLen Brown */ 1063b52b21fSRafael J. Wysocki static int add_dock_dependent_device(struct dock_station *ds, 1073b52b21fSRafael J. Wysocki struct acpi_device *adev) 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 1153b52b21fSRafael J. Wysocki dd->adev = adev; 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 { 188edf5bf34SRafael J. Wysocki struct acpi_device *adev = dd->adev; 18921a31013SRafael J. Wysocki acpi_notify_handler cb = NULL; 19021a31013SRafael J. Wysocki bool run = false; 19121a31013SRafael J. Wysocki 192edf5bf34SRafael J. Wysocki acpi_lock_hp_context(); 193edf5bf34SRafael J. Wysocki 194edf5bf34SRafael J. Wysocki if (!adev->hp) 195edf5bf34SRafael J. Wysocki goto no_context; 196edf5bf34SRafael J. Wysocki 197edf5bf34SRafael J. Wysocki if (cb_type == DOCK_CALL_FIXUP) { 198edf5bf34SRafael J. Wysocki void (*fixup)(struct acpi_device *); 199edf5bf34SRafael J. Wysocki 200edf5bf34SRafael J. Wysocki fixup = adev->hp->fixup; 201edf5bf34SRafael J. Wysocki if (fixup) { 202edf5bf34SRafael J. Wysocki acpi_unlock_hp_context(); 203edf5bf34SRafael J. Wysocki fixup(adev); 204edf5bf34SRafael J. Wysocki return; 205edf5bf34SRafael J. Wysocki } 206edf5bf34SRafael J. Wysocki } else { 207edf5bf34SRafael J. Wysocki int (*notify)(struct acpi_device *, u32); 208edf5bf34SRafael J. Wysocki 209edf5bf34SRafael J. Wysocki notify = adev->hp->event; 210edf5bf34SRafael J. Wysocki if (notify) { 211edf5bf34SRafael J. Wysocki acpi_unlock_hp_context(); 212edf5bf34SRafael J. Wysocki notify(adev, event); 213edf5bf34SRafael J. Wysocki return; 214edf5bf34SRafael J. Wysocki } 215edf5bf34SRafael J. Wysocki } 216edf5bf34SRafael J. Wysocki 217edf5bf34SRafael J. Wysocki no_context: 218edf5bf34SRafael J. Wysocki acpi_unlock_hp_context(); 219edf5bf34SRafael J. Wysocki 22021a31013SRafael J. Wysocki mutex_lock(&hotplug_lock); 22121a31013SRafael J. Wysocki 22221a31013SRafael J. Wysocki if (dd->hp_context) { 22321a31013SRafael J. Wysocki run = true; 22421a31013SRafael J. Wysocki dd->hp_refcount++; 225f09ce741SRafael J. Wysocki if (dd->hp_ops) { 226f09ce741SRafael J. Wysocki switch (cb_type) { 227f09ce741SRafael J. Wysocki case DOCK_CALL_FIXUP: 228f09ce741SRafael J. Wysocki cb = dd->hp_ops->fixup; 229f09ce741SRafael J. Wysocki break; 230f09ce741SRafael J. Wysocki case DOCK_CALL_UEVENT: 231f09ce741SRafael J. Wysocki cb = dd->hp_ops->uevent; 232f09ce741SRafael J. Wysocki break; 233f09ce741SRafael J. Wysocki default: 234f09ce741SRafael J. Wysocki cb = dd->hp_ops->handler; 235f09ce741SRafael J. Wysocki } 236f09ce741SRafael J. Wysocki } 23721a31013SRafael J. Wysocki } 23821a31013SRafael J. Wysocki 23921a31013SRafael J. Wysocki mutex_unlock(&hotplug_lock); 24021a31013SRafael J. Wysocki 24121a31013SRafael J. Wysocki if (!run) 24221a31013SRafael J. Wysocki return; 24321a31013SRafael J. Wysocki 24421a31013SRafael J. Wysocki if (cb) 2453b52b21fSRafael J. Wysocki cb(dd->adev->handle, event, dd->hp_context); 24621a31013SRafael J. Wysocki 24721a31013SRafael J. Wysocki dock_release_hotplug(dd); 248c8f7a62cSLen Brown } 249c8f7a62cSLen Brown 2501e2380cdSRafael J. Wysocki static struct dock_station *find_dock_station(acpi_handle handle) 2511e2380cdSRafael J. Wysocki { 2521e2380cdSRafael J. Wysocki struct dock_station *ds; 2531e2380cdSRafael J. Wysocki 2541e2380cdSRafael J. Wysocki list_for_each_entry(ds, &dock_stations, sibling) 2551e2380cdSRafael J. Wysocki if (ds->handle == handle) 2561e2380cdSRafael J. Wysocki return ds; 2571e2380cdSRafael J. Wysocki 2581e2380cdSRafael J. Wysocki return NULL; 2591e2380cdSRafael J. Wysocki } 2601e2380cdSRafael J. Wysocki 261c8f7a62cSLen Brown /** 262c8f7a62cSLen Brown * find_dock_dependent_device - get a device dependent on this dock 263c8f7a62cSLen Brown * @ds: the dock station 2643b52b21fSRafael J. Wysocki * @adev: ACPI device object to find. 265c8f7a62cSLen Brown * 266c8f7a62cSLen Brown * iterate over the dependent device list for this dock. If the 267c8f7a62cSLen Brown * dependent device matches the handle, return. 268c8f7a62cSLen Brown */ 269c8f7a62cSLen Brown static struct dock_dependent_device * 2703b52b21fSRafael J. Wysocki find_dock_dependent_device(struct dock_station *ds, struct acpi_device *adev) 271c8f7a62cSLen Brown { 272c8f7a62cSLen Brown struct dock_dependent_device *dd; 273c8f7a62cSLen Brown 274ed633e70SJiang Liu list_for_each_entry(dd, &ds->dependent_devices, list) 2753b52b21fSRafael J. Wysocki if (adev == dd->adev) 276c8f7a62cSLen Brown return dd; 277ed633e70SJiang Liu 278c8f7a62cSLen Brown return NULL; 279c8f7a62cSLen Brown } 280c8f7a62cSLen Brown 2811e2380cdSRafael J. Wysocki void register_dock_dependent_device(struct acpi_device *adev, 2821e2380cdSRafael J. Wysocki acpi_handle dshandle) 2831e2380cdSRafael J. Wysocki { 2841e2380cdSRafael J. Wysocki struct dock_station *ds = find_dock_station(dshandle); 2851e2380cdSRafael J. Wysocki 2863b52b21fSRafael J. Wysocki if (ds && !find_dock_dependent_device(ds, adev)) 2873b52b21fSRafael J. Wysocki add_dock_dependent_device(ds, adev); 2881e2380cdSRafael J. Wysocki } 2891e2380cdSRafael J. Wysocki 290c8f7a62cSLen Brown /***************************************************************************** 291c8f7a62cSLen Brown * Dock functions * 292c8f7a62cSLen Brown *****************************************************************************/ 293db350b08SShaohua Li 294c8f7a62cSLen Brown /** 295c8f7a62cSLen Brown * is_dock_device - see if a device is on a dock station 2963b52b21fSRafael J. Wysocki * @adev: ACPI device object to check. 297c8f7a62cSLen Brown * 298c8f7a62cSLen Brown * If this device is either the dock station itself, 299c8f7a62cSLen Brown * or is a device dependent on the dock station, then it 300c8f7a62cSLen Brown * is a dock device 301c8f7a62cSLen Brown */ 3023b52b21fSRafael J. Wysocki int is_dock_device(struct acpi_device *adev) 303c8f7a62cSLen Brown { 304db350b08SShaohua Li struct dock_station *dock_station; 305db350b08SShaohua Li 306db350b08SShaohua Li if (!dock_station_count) 307c8f7a62cSLen Brown return 0; 308c8f7a62cSLen Brown 3093b52b21fSRafael J. Wysocki if (acpi_dock_match(adev->handle)) 310c8f7a62cSLen Brown return 1; 311747479a3SAlex Chiang 312747479a3SAlex Chiang list_for_each_entry(dock_station, &dock_stations, sibling) 3133b52b21fSRafael J. Wysocki if (find_dock_dependent_device(dock_station, adev)) 314db350b08SShaohua Li return 1; 315c8f7a62cSLen Brown 316c8f7a62cSLen Brown return 0; 317c8f7a62cSLen Brown } 318c8f7a62cSLen Brown EXPORT_SYMBOL_GPL(is_dock_device); 319c8f7a62cSLen Brown 320c8f7a62cSLen Brown /** 321c8f7a62cSLen Brown * dock_present - see if the dock station is present. 322c8f7a62cSLen Brown * @ds: the dock station 323c8f7a62cSLen Brown * 324c8f7a62cSLen Brown * execute the _STA method. note that present does not 325c8f7a62cSLen Brown * imply that we are docked. 326c8f7a62cSLen Brown */ 327c8f7a62cSLen Brown static int dock_present(struct dock_station *ds) 328c8f7a62cSLen Brown { 32927663c58SMatthew Wilcox unsigned long long sta; 330c8f7a62cSLen Brown acpi_status status; 331c8f7a62cSLen Brown 332c8f7a62cSLen Brown if (ds) { 333c8f7a62cSLen Brown status = acpi_evaluate_integer(ds->handle, "_STA", NULL, &sta); 334c8f7a62cSLen Brown if (ACPI_SUCCESS(status) && sta) 335c8f7a62cSLen Brown return 1; 336c8f7a62cSLen Brown } 337c8f7a62cSLen Brown return 0; 338c8f7a62cSLen Brown } 339c8f7a62cSLen Brown 340c8f7a62cSLen Brown /** 34137f90877SRafael J. Wysocki * hot_remove_dock_devices - Remove dock station devices. 34237f90877SRafael J. Wysocki * @ds: Dock station. 34337f90877SRafael J. Wysocki */ 34437f90877SRafael J. Wysocki static void hot_remove_dock_devices(struct dock_station *ds) 34537f90877SRafael J. Wysocki { 34637f90877SRafael J. Wysocki struct dock_dependent_device *dd; 34737f90877SRafael J. Wysocki 34837f90877SRafael J. Wysocki /* 34937f90877SRafael J. Wysocki * Walk the list in reverse order so that devices that have been added 35037f90877SRafael J. Wysocki * last are removed first (in case there are some indirect dependencies 35137f90877SRafael J. Wysocki * between them). 35237f90877SRafael J. Wysocki */ 35337f90877SRafael J. Wysocki list_for_each_entry_reverse(dd, &ds->dependent_devices, list) 35437f90877SRafael J. Wysocki dock_hotplug_event(dd, ACPI_NOTIFY_EJECT_REQUEST, false); 35537f90877SRafael J. Wysocki 35637f90877SRafael J. Wysocki list_for_each_entry_reverse(dd, &ds->dependent_devices, list) 3573b52b21fSRafael J. Wysocki acpi_bus_trim(dd->adev); 35837f90877SRafael J. Wysocki } 35937f90877SRafael J. Wysocki 36037f90877SRafael J. Wysocki /** 36137f90877SRafael J. Wysocki * hotplug_dock_devices - Insert devices on a dock station. 362c8f7a62cSLen Brown * @ds: the dock station 36337f90877SRafael J. Wysocki * @event: either bus check or device check request 364c8f7a62cSLen Brown * 365c8f7a62cSLen Brown * Some devices on the dock station need to have drivers called 366c8f7a62cSLen Brown * to perform hotplug operations after a dock event has occurred. 367c8f7a62cSLen Brown * Traverse the list of dock devices that have registered a 368c8f7a62cSLen Brown * hotplug handler, and call the handler. 369c8f7a62cSLen Brown */ 370c8f7a62cSLen Brown static void hotplug_dock_devices(struct dock_station *ds, u32 event) 371c8f7a62cSLen Brown { 372c8f7a62cSLen Brown struct dock_dependent_device *dd; 373c8f7a62cSLen Brown 374f09ce741SRafael J. Wysocki /* Call driver specific post-dock fixups. */ 375f09ce741SRafael J. Wysocki list_for_each_entry(dd, &ds->dependent_devices, list) 376f09ce741SRafael J. Wysocki dock_hotplug_event(dd, event, DOCK_CALL_FIXUP); 377f09ce741SRafael J. Wysocki 37837f90877SRafael J. Wysocki /* Call driver specific hotplug functions. */ 37921a31013SRafael J. Wysocki list_for_each_entry(dd, &ds->dependent_devices, list) 380f09ce741SRafael J. Wysocki dock_hotplug_event(dd, event, DOCK_CALL_HANDLER); 381c8f7a62cSLen Brown 382c8f7a62cSLen Brown /* 3833b52b21fSRafael J. Wysocki * Check if all devices have been enumerated already. If not, run 3843b52b21fSRafael J. Wysocki * acpi_bus_scan() for them and that will cause scan handlers to be 3853b52b21fSRafael J. Wysocki * attached to device objects or acpi_drivers to be stopped/started if 3863b52b21fSRafael J. Wysocki * they are present. 387c8f7a62cSLen Brown */ 3883b52b21fSRafael J. Wysocki list_for_each_entry(dd, &ds->dependent_devices, list) { 3893b52b21fSRafael J. Wysocki struct acpi_device *adev = dd->adev; 3903b52b21fSRafael J. Wysocki 3913b52b21fSRafael J. Wysocki if (!acpi_device_enumerated(adev)) { 3923b52b21fSRafael J. Wysocki int ret = acpi_bus_scan(adev->handle); 3933b52b21fSRafael J. Wysocki if (ret) 3943b52b21fSRafael J. Wysocki dev_dbg(&adev->dev, "scan error %d\n", -ret); 3953b52b21fSRafael J. Wysocki } 3963b52b21fSRafael J. Wysocki } 397c8f7a62cSLen Brown } 398c8f7a62cSLen Brown 399c8f7a62cSLen Brown static void dock_event(struct dock_station *ds, u32 event, int num) 400c8f7a62cSLen Brown { 401db350b08SShaohua Li struct device *dev = &ds->dock_device->dev; 40266b56821SHolger Macht char event_string[13]; 40379a8f70bSKristen Carlson Accardi char *envp[] = { event_string, NULL }; 4041253f7aaSShaohua Li struct dock_dependent_device *dd; 40579a8f70bSKristen Carlson Accardi 40679a8f70bSKristen Carlson Accardi if (num == UNDOCK_EVENT) 40766b56821SHolger Macht sprintf(event_string, "EVENT=undock"); 40879a8f70bSKristen Carlson Accardi else 40966b56821SHolger Macht sprintf(event_string, "EVENT=dock"); 41079a8f70bSKristen Carlson Accardi 4115669021eSKristen Carlson Accardi /* 4128ea86e0bSKristen Carlson Accardi * Indicate that the status of the dock station has 4138ea86e0bSKristen Carlson Accardi * changed. 4145669021eSKristen Carlson Accardi */ 4151253f7aaSShaohua Li if (num == DOCK_EVENT) 4161253f7aaSShaohua Li kobject_uevent_env(&dev->kobj, KOBJ_CHANGE, envp); 4171253f7aaSShaohua Li 41821a31013SRafael J. Wysocki list_for_each_entry(dd, &ds->dependent_devices, list) 419f09ce741SRafael J. Wysocki dock_hotplug_event(dd, event, DOCK_CALL_UEVENT); 420747479a3SAlex Chiang 4211253f7aaSShaohua Li if (num != DOCK_EVENT) 42279a8f70bSKristen Carlson Accardi kobject_uevent_env(&dev->kobj, KOBJ_CHANGE, envp); 423c8f7a62cSLen Brown } 424c8f7a62cSLen Brown 425c8f7a62cSLen Brown /** 426c8f7a62cSLen Brown * handle_dock - handle a dock event 427c8f7a62cSLen Brown * @ds: the dock station 428c8f7a62cSLen Brown * @dock: to dock, or undock - that is the question 429c8f7a62cSLen Brown * 430c8f7a62cSLen Brown * Execute the _DCK method in response to an acpi event 431c8f7a62cSLen Brown */ 432c8f7a62cSLen Brown static void handle_dock(struct dock_station *ds, int dock) 433c8f7a62cSLen Brown { 434c8f7a62cSLen Brown acpi_status status; 435c8f7a62cSLen Brown struct acpi_object_list arg_list; 436c8f7a62cSLen Brown union acpi_object arg; 4376a868e17SZhang Rui unsigned long long value; 438c8f7a62cSLen Brown 439cd73018fSToshi Kani acpi_handle_info(ds->handle, "%s\n", dock ? "docking" : "undocking"); 440c8f7a62cSLen Brown 441c8f7a62cSLen Brown /* _DCK method has one argument */ 442c8f7a62cSLen Brown arg_list.count = 1; 443c8f7a62cSLen Brown arg_list.pointer = &arg; 444c8f7a62cSLen Brown arg.type = ACPI_TYPE_INTEGER; 445c8f7a62cSLen Brown arg.integer.value = dock; 4466a868e17SZhang Rui status = acpi_evaluate_integer(ds->handle, "_DCK", &arg_list, &value); 447db350b08SShaohua Li if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) 448cd73018fSToshi Kani acpi_handle_err(ds->handle, "Failed to execute _DCK (0x%x)\n", 449cd73018fSToshi Kani status); 450c8f7a62cSLen Brown } 451c8f7a62cSLen Brown 452c8f7a62cSLen Brown static inline void dock(struct dock_station *ds) 453c8f7a62cSLen Brown { 454c8f7a62cSLen Brown handle_dock(ds, 1); 455c8f7a62cSLen Brown } 456c8f7a62cSLen Brown 457c8f7a62cSLen Brown static inline void undock(struct dock_station *ds) 458c8f7a62cSLen Brown { 459c8f7a62cSLen Brown handle_dock(ds, 0); 460c8f7a62cSLen Brown } 461c8f7a62cSLen Brown 462c8f7a62cSLen Brown static inline void begin_dock(struct dock_station *ds) 463c8f7a62cSLen Brown { 464c8f7a62cSLen Brown ds->flags |= DOCK_DOCKING; 465c8f7a62cSLen Brown } 466c8f7a62cSLen Brown 467c8f7a62cSLen Brown static inline void complete_dock(struct dock_station *ds) 468c8f7a62cSLen Brown { 469c8f7a62cSLen Brown ds->flags &= ~(DOCK_DOCKING); 470c8f7a62cSLen Brown ds->last_dock_time = jiffies; 471c8f7a62cSLen Brown } 472c8f7a62cSLen Brown 473a0cd35fdSKristen Carlson Accardi static inline void begin_undock(struct dock_station *ds) 474a0cd35fdSKristen Carlson Accardi { 475a0cd35fdSKristen Carlson Accardi ds->flags |= DOCK_UNDOCKING; 476a0cd35fdSKristen Carlson Accardi } 477a0cd35fdSKristen Carlson Accardi 478a0cd35fdSKristen Carlson Accardi static inline void complete_undock(struct dock_station *ds) 479a0cd35fdSKristen Carlson Accardi { 480a0cd35fdSKristen Carlson Accardi ds->flags &= ~(DOCK_UNDOCKING); 481a0cd35fdSKristen Carlson Accardi } 482a0cd35fdSKristen Carlson Accardi 483c8f7a62cSLen Brown /** 484c8f7a62cSLen Brown * dock_in_progress - see if we are in the middle of handling a dock event 485c8f7a62cSLen Brown * @ds: the dock station 486c8f7a62cSLen Brown * 487c8f7a62cSLen Brown * Sometimes while docking, false dock events can be sent to the driver 488c8f7a62cSLen Brown * because good connections aren't made or some other reason. Ignore these 489c8f7a62cSLen Brown * if we are in the middle of doing something. 490c8f7a62cSLen Brown */ 491c8f7a62cSLen Brown static int dock_in_progress(struct dock_station *ds) 492c8f7a62cSLen Brown { 493c8f7a62cSLen Brown if ((ds->flags & DOCK_DOCKING) || 494c8f7a62cSLen Brown time_before(jiffies, (ds->last_dock_time + HZ))) 495c8f7a62cSLen Brown return 1; 496c8f7a62cSLen Brown return 0; 497c8f7a62cSLen Brown } 498c8f7a62cSLen Brown 499c8f7a62cSLen Brown /** 500c8f7a62cSLen Brown * register_hotplug_dock_device - register a hotplug function 501c8f7a62cSLen Brown * @handle: the handle of the device 5021253f7aaSShaohua Li * @ops: handlers to call after docking 503c8f7a62cSLen Brown * @context: device specific data 50421a31013SRafael J. Wysocki * @init: Optional initialization routine to run after registration 50521a31013SRafael J. Wysocki * @release: Optional release routine to run on unregistration 506c8f7a62cSLen Brown * 507c8f7a62cSLen Brown * If a driver would like to perform a hotplug operation after a dock 508c8f7a62cSLen Brown * event, they can register an acpi_notifiy_handler to be called by 509c8f7a62cSLen Brown * the dock driver after _DCK is executed. 510c8f7a62cSLen Brown */ 51121a31013SRafael J. Wysocki int register_hotplug_dock_device(acpi_handle handle, 51221a31013SRafael J. Wysocki const struct acpi_dock_ops *ops, void *context, 51321a31013SRafael J. Wysocki void (*init)(void *), void (*release)(void *)) 514c8f7a62cSLen Brown { 515c8f7a62cSLen Brown struct dock_dependent_device *dd; 516db350b08SShaohua Li struct dock_station *dock_station; 5173b52b21fSRafael J. Wysocki struct acpi_device *adev; 51861b83695SShaohua Li int ret = -EINVAL; 519c8f7a62cSLen Brown 52021a31013SRafael J. Wysocki if (WARN_ON(!context)) 52121a31013SRafael J. Wysocki return -EINVAL; 52221a31013SRafael J. Wysocki 523db350b08SShaohua Li if (!dock_station_count) 524c8f7a62cSLen Brown return -ENODEV; 525c8f7a62cSLen Brown 5263b52b21fSRafael J. Wysocki ret = acpi_bus_get_device(handle, &adev); 5273b52b21fSRafael J. Wysocki if (ret) 5283b52b21fSRafael J. Wysocki return ret; 5293b52b21fSRafael J. Wysocki 530c8f7a62cSLen Brown /* 531c8f7a62cSLen Brown * make sure this handle is for a device dependent on the dock, 532c8f7a62cSLen Brown * this would include the dock station itself 533c8f7a62cSLen Brown */ 53450d716e4SAlex Chiang list_for_each_entry(dock_station, &dock_stations, sibling) { 53561b83695SShaohua Li /* 53661b83695SShaohua Li * An ATA bay can be in a dock and itself can be ejected 5373ad2f3fbSDaniel Mack * separately, so there are two 'dock stations' which need the 53861b83695SShaohua Li * ops 53961b83695SShaohua Li */ 5403b52b21fSRafael J. Wysocki dd = find_dock_dependent_device(dock_station, adev); 54121a31013SRafael J. Wysocki if (dd && !dock_init_hotplug(dd, ops, context, init, release)) 54261b83695SShaohua Li ret = 0; 543c8f7a62cSLen Brown } 544c8f7a62cSLen Brown 54561b83695SShaohua Li return ret; 546c8f7a62cSLen Brown } 547c8f7a62cSLen Brown EXPORT_SYMBOL_GPL(register_hotplug_dock_device); 548c8f7a62cSLen Brown 549c8f7a62cSLen Brown /** 550c8f7a62cSLen Brown * unregister_hotplug_dock_device - remove yourself from the hotplug list 551c8f7a62cSLen Brown * @handle: the acpi handle of the device 552c8f7a62cSLen Brown */ 553c8f7a62cSLen Brown void unregister_hotplug_dock_device(acpi_handle handle) 554c8f7a62cSLen Brown { 555c8f7a62cSLen Brown struct dock_dependent_device *dd; 556db350b08SShaohua Li struct dock_station *dock_station; 5573b52b21fSRafael J. Wysocki struct acpi_device *adev; 558c8f7a62cSLen Brown 559db350b08SShaohua Li if (!dock_station_count) 560c8f7a62cSLen Brown return; 561c8f7a62cSLen Brown 5623b52b21fSRafael J. Wysocki if (acpi_bus_get_device(handle, &adev)) 5633b52b21fSRafael J. Wysocki return; 5643b52b21fSRafael J. Wysocki 56550d716e4SAlex Chiang list_for_each_entry(dock_station, &dock_stations, sibling) { 5663b52b21fSRafael J. Wysocki dd = find_dock_dependent_device(dock_station, adev); 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 /** 6061e2380cdSRafael J. Wysocki * dock_notify - Handle ACPI dock notification. 6071e2380cdSRafael J. Wysocki * @adev: Dock station's ACPI device object. 6081e2380cdSRafael J. Wysocki * @event: Event code. 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 */ 6141e2380cdSRafael J. Wysocki int dock_notify(struct acpi_device *adev, u32 event) 615c8f7a62cSLen Brown { 6161e2380cdSRafael J. Wysocki acpi_handle handle = adev->handle; 6171e2380cdSRafael J. Wysocki struct dock_station *ds = find_dock_station(handle); 618db350b08SShaohua Li int surprise_removal = 0; 619c8f7a62cSLen Brown 6201e2380cdSRafael J. Wysocki if (!ds) 6211e2380cdSRafael J. Wysocki return -ENODEV; 6221e2380cdSRafael J. Wysocki 623db350b08SShaohua Li /* 624db350b08SShaohua Li * According to acpi spec 3.0a, if a DEVICE_CHECK notification 625db350b08SShaohua Li * is sent and _DCK is present, it is assumed to mean an undock 626db350b08SShaohua Li * request. 627db350b08SShaohua Li */ 628db350b08SShaohua Li if ((ds->flags & DOCK_IS_DOCK) && event == ACPI_NOTIFY_DEVICE_CHECK) 629db350b08SShaohua Li event = ACPI_NOTIFY_EJECT_REQUEST; 630db350b08SShaohua Li 631db350b08SShaohua Li /* 632db350b08SShaohua Li * dock station: BUS_CHECK - docked or surprise removal 633db350b08SShaohua Li * DEVICE_CHECK - undocked 634db350b08SShaohua Li * other device: BUS_CHECK/DEVICE_CHECK - added or surprise removal 635db350b08SShaohua Li * 636db350b08SShaohua Li * To simplify event handling, dock dependent device handler always 637db350b08SShaohua Li * get ACPI_NOTIFY_BUS_CHECK/ACPI_NOTIFY_DEVICE_CHECK for add and 638db350b08SShaohua Li * ACPI_NOTIFY_EJECT_REQUEST for removal 639db350b08SShaohua Li */ 640c8f7a62cSLen Brown switch (event) { 641c8f7a62cSLen Brown case ACPI_NOTIFY_BUS_CHECK: 642db350b08SShaohua Li case ACPI_NOTIFY_DEVICE_CHECK: 6430a8e5c3dSRafael J. Wysocki if (!dock_in_progress(ds) && !acpi_device_enumerated(adev)) { 644c8f7a62cSLen Brown begin_dock(ds); 645c8f7a62cSLen Brown dock(ds); 646c8f7a62cSLen Brown if (!dock_present(ds)) { 647cd73018fSToshi Kani acpi_handle_err(handle, "Unable to dock!\n"); 6488b59560aSShaohua Li complete_dock(ds); 649c8f7a62cSLen Brown break; 650c8f7a62cSLen Brown } 651c8f7a62cSLen Brown hotplug_dock_devices(ds, event); 652c8f7a62cSLen Brown complete_dock(ds); 653c8f7a62cSLen Brown dock_event(ds, event, DOCK_EVENT); 654c9b5471fSJiang Liu acpi_evaluate_lck(ds->handle, 1); 6553a37898dSLin Ming acpi_update_all_gpes(); 656c8f7a62cSLen Brown break; 657db350b08SShaohua Li } 658db350b08SShaohua Li if (dock_present(ds) || dock_in_progress(ds)) 659db350b08SShaohua Li break; 660db350b08SShaohua Li /* This is a surprise removal */ 661db350b08SShaohua Li surprise_removal = 1; 662db350b08SShaohua Li event = ACPI_NOTIFY_EJECT_REQUEST; 663db350b08SShaohua Li /* Fall back */ 664c8f7a62cSLen Brown case ACPI_NOTIFY_EJECT_REQUEST: 665a0cd35fdSKristen Carlson Accardi begin_undock(ds); 666f730ae18SShaohua Li if ((immediate_undock && !(ds->flags & DOCK_IS_ATA)) 667f730ae18SShaohua Li || surprise_removal) 668c80fdbe8Sbrandon@ifup.org handle_eject_request(ds, event); 669a0cd35fdSKristen Carlson Accardi else 670a0cd35fdSKristen Carlson Accardi dock_event(ds, event, UNDOCK_EVENT); 671c8f7a62cSLen Brown break; 672c8f7a62cSLen Brown } 6731e2380cdSRafael J. Wysocki return 0; 674c8f7a62cSLen Brown } 675c8f7a62cSLen Brown 676c80fdbe8Sbrandon@ifup.org /* 677c80fdbe8Sbrandon@ifup.org * show_docked - read method for "docked" file in sysfs 678c80fdbe8Sbrandon@ifup.org */ 679c80fdbe8Sbrandon@ifup.org static ssize_t show_docked(struct device *dev, 680c80fdbe8Sbrandon@ifup.org struct device_attribute *attr, char *buf) 681c80fdbe8Sbrandon@ifup.org { 682fe06fba2SAlex Chiang struct dock_station *dock_station = dev->platform_data; 683ab62f9cdSRafael J. Wysocki struct acpi_device *adev = NULL; 684c80fdbe8Sbrandon@ifup.org 685ab62f9cdSRafael J. Wysocki acpi_bus_get_device(dock_station->handle, &adev); 686ab62f9cdSRafael J. Wysocki return snprintf(buf, PAGE_SIZE, "%u\n", acpi_device_enumerated(adev)); 687c80fdbe8Sbrandon@ifup.org } 688e5685b9dSAdrian Bunk static DEVICE_ATTR(docked, S_IRUGO, show_docked, NULL); 689c80fdbe8Sbrandon@ifup.org 690c80fdbe8Sbrandon@ifup.org /* 691a0cd35fdSKristen Carlson Accardi * show_flags - read method for flags file in sysfs 692a0cd35fdSKristen Carlson Accardi */ 693a0cd35fdSKristen Carlson Accardi static ssize_t show_flags(struct device *dev, 694a0cd35fdSKristen Carlson Accardi struct device_attribute *attr, char *buf) 695a0cd35fdSKristen Carlson Accardi { 696fe06fba2SAlex Chiang struct dock_station *dock_station = dev->platform_data; 697a0cd35fdSKristen Carlson Accardi return snprintf(buf, PAGE_SIZE, "%d\n", dock_station->flags); 698a0cd35fdSKristen Carlson Accardi 699a0cd35fdSKristen Carlson Accardi } 700e5685b9dSAdrian Bunk static DEVICE_ATTR(flags, S_IRUGO, show_flags, NULL); 701a0cd35fdSKristen Carlson Accardi 702a0cd35fdSKristen Carlson Accardi /* 703c80fdbe8Sbrandon@ifup.org * write_undock - write method for "undock" file in sysfs 704c80fdbe8Sbrandon@ifup.org */ 705c80fdbe8Sbrandon@ifup.org static ssize_t write_undock(struct device *dev, struct device_attribute *attr, 706c80fdbe8Sbrandon@ifup.org const char *buf, size_t count) 707c80fdbe8Sbrandon@ifup.org { 708c80fdbe8Sbrandon@ifup.org int ret; 709fe06fba2SAlex Chiang struct dock_station *dock_station = dev->platform_data; 710c80fdbe8Sbrandon@ifup.org 711c80fdbe8Sbrandon@ifup.org if (!count) 712c80fdbe8Sbrandon@ifup.org return -EINVAL; 713c80fdbe8Sbrandon@ifup.org 7148112006fSRafael J. Wysocki acpi_scan_lock_acquire(); 7159171f834SHolger Macht begin_undock(dock_station); 716c80fdbe8Sbrandon@ifup.org ret = handle_eject_request(dock_station, ACPI_NOTIFY_EJECT_REQUEST); 7178112006fSRafael J. Wysocki acpi_scan_lock_release(); 718c80fdbe8Sbrandon@ifup.org return ret ? ret: count; 719c80fdbe8Sbrandon@ifup.org } 720e5685b9dSAdrian Bunk static DEVICE_ATTR(undock, S_IWUSR, NULL, write_undock); 721c80fdbe8Sbrandon@ifup.org 722ac122bb6SIlya A. Volynets-Evenbakh /* 723ac122bb6SIlya A. Volynets-Evenbakh * show_dock_uid - read method for "uid" file in sysfs 724ac122bb6SIlya A. Volynets-Evenbakh */ 725ac122bb6SIlya A. Volynets-Evenbakh static ssize_t show_dock_uid(struct device *dev, 726ac122bb6SIlya A. Volynets-Evenbakh struct device_attribute *attr, char *buf) 727ac122bb6SIlya A. Volynets-Evenbakh { 72827663c58SMatthew Wilcox unsigned long long lbuf; 729fe06fba2SAlex Chiang struct dock_station *dock_station = dev->platform_data; 73038ff4ffcSKristen Carlson Accardi acpi_status status = acpi_evaluate_integer(dock_station->handle, 73138ff4ffcSKristen Carlson Accardi "_UID", NULL, &lbuf); 73238ff4ffcSKristen Carlson Accardi if (ACPI_FAILURE(status)) 733ac122bb6SIlya A. Volynets-Evenbakh return 0; 73438ff4ffcSKristen Carlson Accardi 73527663c58SMatthew Wilcox return snprintf(buf, PAGE_SIZE, "%llx\n", lbuf); 736ac122bb6SIlya A. Volynets-Evenbakh } 737e5685b9dSAdrian Bunk static DEVICE_ATTR(uid, S_IRUGO, show_dock_uid, NULL); 738ac122bb6SIlya A. Volynets-Evenbakh 7398652b00fSShaohua Li static ssize_t show_dock_type(struct device *dev, 7408652b00fSShaohua Li struct device_attribute *attr, char *buf) 7418652b00fSShaohua Li { 742fe06fba2SAlex Chiang struct dock_station *dock_station = dev->platform_data; 7438652b00fSShaohua Li char *type; 7448652b00fSShaohua Li 7458652b00fSShaohua Li if (dock_station->flags & DOCK_IS_DOCK) 7468652b00fSShaohua Li type = "dock_station"; 7478652b00fSShaohua Li else if (dock_station->flags & DOCK_IS_ATA) 7488652b00fSShaohua Li type = "ata_bay"; 7498652b00fSShaohua Li else if (dock_station->flags & DOCK_IS_BAT) 7508652b00fSShaohua Li type = "battery_bay"; 7518652b00fSShaohua Li else 7528652b00fSShaohua Li type = "unknown"; 7538652b00fSShaohua Li 7548652b00fSShaohua Li return snprintf(buf, PAGE_SIZE, "%s\n", type); 7558652b00fSShaohua Li } 7568652b00fSShaohua Li static DEVICE_ATTR(type, S_IRUGO, show_dock_type, NULL); 7578652b00fSShaohua Li 7585f46c2f2SAlex Chiang static struct attribute *dock_attributes[] = { 7595f46c2f2SAlex Chiang &dev_attr_docked.attr, 7605f46c2f2SAlex Chiang &dev_attr_flags.attr, 7615f46c2f2SAlex Chiang &dev_attr_undock.attr, 7625f46c2f2SAlex Chiang &dev_attr_uid.attr, 7635f46c2f2SAlex Chiang &dev_attr_type.attr, 7645f46c2f2SAlex Chiang NULL 7655f46c2f2SAlex Chiang }; 7665f46c2f2SAlex Chiang 7675f46c2f2SAlex Chiang static struct attribute_group dock_attribute_group = { 7685f46c2f2SAlex Chiang .attrs = dock_attributes 7695f46c2f2SAlex Chiang }; 7705f46c2f2SAlex Chiang 771c8f7a62cSLen Brown /** 7721e2380cdSRafael J. Wysocki * acpi_dock_add - Add a new dock station 7731e2380cdSRafael J. Wysocki * @adev: Dock station ACPI device object. 774c8f7a62cSLen Brown * 7751e2380cdSRafael J. Wysocki * allocated and initialize a new dock station device. 776c8f7a62cSLen Brown */ 7771e2380cdSRafael J. Wysocki void acpi_dock_add(struct acpi_device *adev) 778c8f7a62cSLen Brown { 7792efbca4dSRafael J. Wysocki struct dock_station *dock_station, ds = { NULL, }; 780af887449SRafael J. Wysocki struct platform_device_info pdevinfo; 7811e2380cdSRafael J. Wysocki acpi_handle handle = adev->handle; 782747479a3SAlex Chiang struct platform_device *dd; 7832efbca4dSRafael J. Wysocki int ret; 784c8f7a62cSLen Brown 785af887449SRafael J. Wysocki memset(&pdevinfo, 0, sizeof(pdevinfo)); 786af887449SRafael J. Wysocki pdevinfo.name = "dock"; 787af887449SRafael J. Wysocki pdevinfo.id = dock_station_count; 788af887449SRafael J. Wysocki pdevinfo.acpi_node.companion = adev; 789af887449SRafael J. Wysocki pdevinfo.data = &ds; 790af887449SRafael J. Wysocki pdevinfo.size_data = sizeof(ds); 791af887449SRafael J. Wysocki dd = platform_device_register_full(&pdevinfo); 792747479a3SAlex Chiang if (IS_ERR(dd)) 7931e2380cdSRafael J. Wysocki return; 7949751cb72SAlex Chiang 795747479a3SAlex Chiang dock_station = dd->dev.platform_data; 796747479a3SAlex Chiang 797c8f7a62cSLen Brown dock_station->handle = handle; 798747479a3SAlex Chiang dock_station->dock_device = dd; 799c8f7a62cSLen Brown dock_station->last_dock_time = jiffies - HZ; 800c8f7a62cSLen Brown 801747479a3SAlex Chiang INIT_LIST_HEAD(&dock_station->sibling); 802747479a3SAlex Chiang INIT_LIST_HEAD(&dock_station->dependent_devices); 803a0cd35fdSKristen Carlson Accardi 8049ef2a9a9SKristen Carlson Accardi /* we want the dock device to send uevents */ 805747479a3SAlex Chiang dev_set_uevent_suppress(&dd->dev, 0); 8069ef2a9a9SKristen Carlson Accardi 807c9b5471fSJiang Liu if (acpi_dock_match(handle)) 808db350b08SShaohua Li dock_station->flags |= DOCK_IS_DOCK; 809c9b5471fSJiang Liu if (acpi_ata_match(handle)) 810db350b08SShaohua Li dock_station->flags |= DOCK_IS_ATA; 811b43109faSRafael J. Wysocki if (acpi_device_is_battery(adev)) 812db350b08SShaohua Li dock_station->flags |= DOCK_IS_BAT; 813db350b08SShaohua Li 814747479a3SAlex Chiang ret = sysfs_create_group(&dd->dev.kobj, &dock_attribute_group); 8158652b00fSShaohua Li if (ret) 8165f46c2f2SAlex Chiang goto err_unregister; 817671adbecSKristen Carlson Accardi 818c8f7a62cSLen Brown /* add the dock station as a device dependent on itself */ 8193b52b21fSRafael J. Wysocki ret = add_dock_dependent_device(dock_station, adev); 820f69cfdd2SAlex Chiang if (ret) 8215f46c2f2SAlex Chiang goto err_rmgroup; 822c8f7a62cSLen Brown 823db350b08SShaohua Li dock_station_count++; 82450d716e4SAlex Chiang list_add(&dock_station->sibling, &dock_stations); 8251e2380cdSRafael J. Wysocki adev->flags.is_dock_station = true; 8261e2380cdSRafael J. Wysocki dev_info(&adev->dev, "ACPI dock station (docks/bays count: %d)\n", 8271e2380cdSRafael J. Wysocki dock_station_count); 8281e2380cdSRafael J. Wysocki return; 829c8f7a62cSLen Brown 8305f46c2f2SAlex Chiang err_rmgroup: 831a30c4c5eSRafael J. Wysocki remove_dock_dependent_devices(dock_station); 832747479a3SAlex Chiang sysfs_remove_group(&dd->dev.kobj, &dock_attribute_group); 8335f46c2f2SAlex Chiang err_unregister: 834747479a3SAlex Chiang platform_device_unregister(dd); 835cd73018fSToshi Kani acpi_handle_err(handle, "%s encountered error %d\n", __func__, ret); 836c8f7a62cSLen Brown } 837