dock.c revision 0a918a9432cc30aede10f904253b66ea6ab485ac
1c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown/* 2c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * dock.c - ACPI dock station driver 3c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * 4c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * Copyright (C) 2006 Kristen Carlson Accardi <kristen.c.accardi@intel.com> 5c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * 6c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 7c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * 8c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * This program is free software; you can redistribute it and/or modify 9c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * it under the terms of the GNU General Public License as published by 10c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * the Free Software Foundation; either version 2 of the License, or (at 11c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * your option) any later version. 12c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * 13c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * This program is distributed in the hope that it will be useful, but 14c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * WITHOUT ANY WARRANTY; without even the implied warranty of 15c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 16c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * General Public License for more details. 17c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * 18c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * You should have received a copy of the GNU General Public License along 19c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * with this program; if not, write to the Free Software Foundation, Inc., 20c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. 21c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * 22c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 23c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown */ 24c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 25c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown#include <linux/kernel.h> 26c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown#include <linux/module.h> 27c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown#include <linux/init.h> 28c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown#include <linux/types.h> 29c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown#include <linux/notifier.h> 30671adbec210efc15cef81b4616adae8bcd667296Kristen Carlson Accardi#include <linux/platform_device.h> 31914e26379decf1fd984b22e51fd2e4209b7a7f1bAl Viro#include <linux/jiffies.h> 3262a6d7fd9bc1d85f9aae734c46234e88fa839db0Randy Dunlap#include <linux/stddef.h> 33c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown#include <acpi/acpi_bus.h> 34c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown#include <acpi/acpi_drivers.h> 35c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 367cda93e008e1a477970adbf82dba81a5d4f0ae40Len Brown#define ACPI_DOCK_DRIVER_DESCRIPTION "ACPI Dock Station Driver" 37c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 38f52fd66d2ea794010c2d7536cf8e6abed0ac4947Len BrownACPI_MODULE_NAME("dock"); 39c8f7a62cdde461914c6457d5f4362538ed810bf4Len BrownMODULE_AUTHOR("Kristen Carlson Accardi"); 407cda93e008e1a477970adbf82dba81a5d4f0ae40Len BrownMODULE_DESCRIPTION(ACPI_DOCK_DRIVER_DESCRIPTION); 41c8f7a62cdde461914c6457d5f4362538ed810bf4Len BrownMODULE_LICENSE("GPL"); 42c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 43a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardistatic int immediate_undock = 1; 44a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardimodule_param(immediate_undock, bool, 0644); 45a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson AccardiMODULE_PARM_DESC(immediate_undock, "1 (default) will cause the driver to " 46a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardi "undock immediately when the undock button is pressed, 0 will cause" 47a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardi " the driver to wait for userspace to write the undock sysfs file " 48a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardi " before undocking"); 49a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardi 50c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brownstatic struct atomic_notifier_head dock_notifier_list; 51671adbec210efc15cef81b4616adae8bcd667296Kristen Carlson Accardistatic char dock_device_name[] = "dock"; 52c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 53a340af14b4c08a53c5f7d821d8bd910e17403384Frank Seidelstatic const struct acpi_device_id dock_device_ids[] = { 54a340af14b4c08a53c5f7d821d8bd910e17403384Frank Seidel {"LNXDOCK", 0}, 55a340af14b4c08a53c5f7d821d8bd910e17403384Frank Seidel {"", 0}, 56a340af14b4c08a53c5f7d821d8bd910e17403384Frank Seidel}; 57a340af14b4c08a53c5f7d821d8bd910e17403384Frank SeidelMODULE_DEVICE_TABLE(acpi, dock_device_ids); 58a340af14b4c08a53c5f7d821d8bd910e17403384Frank Seidel 59c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brownstruct dock_station { 60c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown acpi_handle handle; 61c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown unsigned long last_dock_time; 62c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown u32 flags; 63c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown spinlock_t dd_lock; 648b0dc866dd9b8d10a53cb3537385a51b7ee54b62Kristen Carlson Accardi struct mutex hp_lock; 65c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown struct list_head dependent_devices; 66c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown struct list_head hotplug_devices; 67db350b084dc2cf816288643861ce07b0562dd723Shaohua Li 68db350b084dc2cf816288643861ce07b0562dd723Shaohua Li struct list_head sibiling; 69db350b084dc2cf816288643861ce07b0562dd723Shaohua Li struct platform_device *dock_device; 70c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown}; 71db350b084dc2cf816288643861ce07b0562dd723Shaohua Listatic LIST_HEAD(dock_stations); 72db350b084dc2cf816288643861ce07b0562dd723Shaohua Listatic int dock_station_count; 73c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 74c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brownstruct dock_dependent_device { 75c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown struct list_head list; 76c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown struct list_head hotplug_list; 77c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown acpi_handle handle; 781253f7aabfebc51446dbec5c8895c5c8846dfe06Shaohua Li struct acpi_dock_ops *ops; 79c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown void *context; 80c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown}; 81c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 82c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown#define DOCK_DOCKING 0x00000001 83a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardi#define DOCK_UNDOCKING 0x00000002 84db350b084dc2cf816288643861ce07b0562dd723Shaohua Li#define DOCK_IS_DOCK 0x00000010 85db350b084dc2cf816288643861ce07b0562dd723Shaohua Li#define DOCK_IS_ATA 0x00000020 86db350b084dc2cf816288643861ce07b0562dd723Shaohua Li#define DOCK_IS_BAT 0x00000040 875669021e40964303994a20633548732c6bb26636Kristen Carlson Accardi#define DOCK_EVENT 3 885669021e40964303994a20633548732c6bb26636Kristen Carlson Accardi#define UNDOCK_EVENT 2 89c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 90c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown/***************************************************************************** 91c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * Dock Dependent device functions * 92c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown *****************************************************************************/ 93c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown/** 94c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * alloc_dock_dependent_device - allocate and init a dependent device 95c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * @handle: the acpi_handle of the dependent device 96c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * 97c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * Allocate memory for a dependent device structure for a device referenced 98c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * by the acpi handle 99c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown */ 100c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brownstatic struct dock_dependent_device * 101c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brownalloc_dock_dependent_device(acpi_handle handle) 102c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown{ 103c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown struct dock_dependent_device *dd; 104c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 105c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown dd = kzalloc(sizeof(*dd), GFP_KERNEL); 106c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown if (dd) { 107c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown dd->handle = handle; 108c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown INIT_LIST_HEAD(&dd->list); 109c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown INIT_LIST_HEAD(&dd->hotplug_list); 110c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown } 111c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown return dd; 112c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown} 113c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 114c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown/** 115c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * add_dock_dependent_device - associate a device with the dock station 116c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * @ds: The dock station 117c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * @dd: The dependent device 118c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * 119c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * Add the dependent device to the dock's dependent device list. 120c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown */ 121c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brownstatic void 122c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brownadd_dock_dependent_device(struct dock_station *ds, 123c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown struct dock_dependent_device *dd) 124c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown{ 125c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown spin_lock(&ds->dd_lock); 126c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown list_add_tail(&dd->list, &ds->dependent_devices); 127c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown spin_unlock(&ds->dd_lock); 128c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown} 129c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 130c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown/** 131c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * dock_add_hotplug_device - associate a hotplug handler with the dock station 132c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * @ds: The dock station 133c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * @dd: The dependent device struct 134c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * 135c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * Add the dependent device to the dock's hotplug device list 136c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown */ 137c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brownstatic void 138c8f7a62cdde461914c6457d5f4362538ed810bf4Len Browndock_add_hotplug_device(struct dock_station *ds, 139c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown struct dock_dependent_device *dd) 140c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown{ 1418b0dc866dd9b8d10a53cb3537385a51b7ee54b62Kristen Carlson Accardi mutex_lock(&ds->hp_lock); 142c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown list_add_tail(&dd->hotplug_list, &ds->hotplug_devices); 1438b0dc866dd9b8d10a53cb3537385a51b7ee54b62Kristen Carlson Accardi mutex_unlock(&ds->hp_lock); 144c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown} 145c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 146c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown/** 147c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * dock_del_hotplug_device - remove a hotplug handler from the dock station 148c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * @ds: The dock station 149c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * @dd: the dependent device struct 150c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * 151c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * Delete the dependent device from the dock's hotplug device list 152c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown */ 153c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brownstatic void 154c8f7a62cdde461914c6457d5f4362538ed810bf4Len Browndock_del_hotplug_device(struct dock_station *ds, 155c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown struct dock_dependent_device *dd) 156c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown{ 1578b0dc866dd9b8d10a53cb3537385a51b7ee54b62Kristen Carlson Accardi mutex_lock(&ds->hp_lock); 158c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown list_del(&dd->hotplug_list); 1598b0dc866dd9b8d10a53cb3537385a51b7ee54b62Kristen Carlson Accardi mutex_unlock(&ds->hp_lock); 160c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown} 161c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 162c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown/** 163c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * find_dock_dependent_device - get a device dependent on this dock 164c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * @ds: the dock station 165c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * @handle: the acpi_handle of the device we want 166c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * 167c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * iterate over the dependent device list for this dock. If the 168c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * dependent device matches the handle, return. 169c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown */ 170c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brownstatic struct dock_dependent_device * 171c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brownfind_dock_dependent_device(struct dock_station *ds, acpi_handle handle) 172c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown{ 173c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown struct dock_dependent_device *dd; 174c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 175c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown spin_lock(&ds->dd_lock); 176c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown list_for_each_entry(dd, &ds->dependent_devices, list) { 177c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown if (handle == dd->handle) { 178c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown spin_unlock(&ds->dd_lock); 179c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown return dd; 180c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown } 181c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown } 182c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown spin_unlock(&ds->dd_lock); 183c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown return NULL; 184c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown} 185c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 186c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown/***************************************************************************** 187c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * Dock functions * 188c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown *****************************************************************************/ 189c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown/** 190c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * is_dock - see if a device is a dock station 191c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * @handle: acpi handle of the device 192c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * 193c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * If an acpi object has a _DCK method, then it is by definition a dock 194c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * station, so return true. 195c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown */ 196c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brownstatic int is_dock(acpi_handle handle) 197c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown{ 198c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown acpi_status status; 199c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown acpi_handle tmp; 200c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 201c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown status = acpi_get_handle(handle, "_DCK", &tmp); 202c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown if (ACPI_FAILURE(status)) 203c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown return 0; 204c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown return 1; 205c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown} 206c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 207db350b084dc2cf816288643861ce07b0562dd723Shaohua Listatic int is_ejectable(acpi_handle handle) 208db350b084dc2cf816288643861ce07b0562dd723Shaohua Li{ 209db350b084dc2cf816288643861ce07b0562dd723Shaohua Li acpi_status status; 210db350b084dc2cf816288643861ce07b0562dd723Shaohua Li acpi_handle tmp; 211db350b084dc2cf816288643861ce07b0562dd723Shaohua Li 212db350b084dc2cf816288643861ce07b0562dd723Shaohua Li status = acpi_get_handle(handle, "_EJ0", &tmp); 213db350b084dc2cf816288643861ce07b0562dd723Shaohua Li if (ACPI_FAILURE(status)) 214db350b084dc2cf816288643861ce07b0562dd723Shaohua Li return 0; 215db350b084dc2cf816288643861ce07b0562dd723Shaohua Li return 1; 216db350b084dc2cf816288643861ce07b0562dd723Shaohua Li} 217db350b084dc2cf816288643861ce07b0562dd723Shaohua Li 218db350b084dc2cf816288643861ce07b0562dd723Shaohua Listatic int is_ata(acpi_handle handle) 219db350b084dc2cf816288643861ce07b0562dd723Shaohua Li{ 220db350b084dc2cf816288643861ce07b0562dd723Shaohua Li acpi_handle tmp; 221db350b084dc2cf816288643861ce07b0562dd723Shaohua Li 222db350b084dc2cf816288643861ce07b0562dd723Shaohua Li if ((ACPI_SUCCESS(acpi_get_handle(handle, "_GTF", &tmp))) || 223db350b084dc2cf816288643861ce07b0562dd723Shaohua Li (ACPI_SUCCESS(acpi_get_handle(handle, "_GTM", &tmp))) || 224db350b084dc2cf816288643861ce07b0562dd723Shaohua Li (ACPI_SUCCESS(acpi_get_handle(handle, "_STM", &tmp))) || 225db350b084dc2cf816288643861ce07b0562dd723Shaohua Li (ACPI_SUCCESS(acpi_get_handle(handle, "_SDD", &tmp)))) 226db350b084dc2cf816288643861ce07b0562dd723Shaohua Li return 1; 227db350b084dc2cf816288643861ce07b0562dd723Shaohua Li 228db350b084dc2cf816288643861ce07b0562dd723Shaohua Li return 0; 229db350b084dc2cf816288643861ce07b0562dd723Shaohua Li} 230db350b084dc2cf816288643861ce07b0562dd723Shaohua Li 231db350b084dc2cf816288643861ce07b0562dd723Shaohua Listatic int is_battery(acpi_handle handle) 232db350b084dc2cf816288643861ce07b0562dd723Shaohua Li{ 233db350b084dc2cf816288643861ce07b0562dd723Shaohua Li struct acpi_device_info *info; 234db350b084dc2cf816288643861ce07b0562dd723Shaohua Li struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; 235db350b084dc2cf816288643861ce07b0562dd723Shaohua Li int ret = 1; 236db350b084dc2cf816288643861ce07b0562dd723Shaohua Li 237db350b084dc2cf816288643861ce07b0562dd723Shaohua Li if (!ACPI_SUCCESS(acpi_get_object_info(handle, &buffer))) 238db350b084dc2cf816288643861ce07b0562dd723Shaohua Li return 0; 239db350b084dc2cf816288643861ce07b0562dd723Shaohua Li info = buffer.pointer; 240db350b084dc2cf816288643861ce07b0562dd723Shaohua Li if (!(info->valid & ACPI_VALID_HID)) 241db350b084dc2cf816288643861ce07b0562dd723Shaohua Li ret = 0; 242db350b084dc2cf816288643861ce07b0562dd723Shaohua Li else 243db350b084dc2cf816288643861ce07b0562dd723Shaohua Li ret = !strcmp("PNP0C0A", info->hardware_id.value); 244db350b084dc2cf816288643861ce07b0562dd723Shaohua Li 245db350b084dc2cf816288643861ce07b0562dd723Shaohua Li kfree(buffer.pointer); 246db350b084dc2cf816288643861ce07b0562dd723Shaohua Li return ret; 247db350b084dc2cf816288643861ce07b0562dd723Shaohua Li} 248db350b084dc2cf816288643861ce07b0562dd723Shaohua Li 249db350b084dc2cf816288643861ce07b0562dd723Shaohua Listatic int is_ejectable_bay(acpi_handle handle) 250db350b084dc2cf816288643861ce07b0562dd723Shaohua Li{ 251db350b084dc2cf816288643861ce07b0562dd723Shaohua Li acpi_handle phandle; 252db350b084dc2cf816288643861ce07b0562dd723Shaohua Li if (!is_ejectable(handle)) 253db350b084dc2cf816288643861ce07b0562dd723Shaohua Li return 0; 254db350b084dc2cf816288643861ce07b0562dd723Shaohua Li if (is_battery(handle) || is_ata(handle)) 255db350b084dc2cf816288643861ce07b0562dd723Shaohua Li return 1; 256db350b084dc2cf816288643861ce07b0562dd723Shaohua Li if (!acpi_get_parent(handle, &phandle) && is_ata(phandle)) 257db350b084dc2cf816288643861ce07b0562dd723Shaohua Li return 1; 258db350b084dc2cf816288643861ce07b0562dd723Shaohua Li return 0; 259db350b084dc2cf816288643861ce07b0562dd723Shaohua Li} 260db350b084dc2cf816288643861ce07b0562dd723Shaohua Li 261c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown/** 262c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * is_dock_device - see if a device is on a dock station 263c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * @handle: acpi handle of the device 264c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * 265c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * If this device is either the dock station itself, 266c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * or is a device dependent on the dock station, then it 267c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * is a dock device 268c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown */ 269c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brownint is_dock_device(acpi_handle handle) 270c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown{ 271db350b084dc2cf816288643861ce07b0562dd723Shaohua Li struct dock_station *dock_station; 272db350b084dc2cf816288643861ce07b0562dd723Shaohua Li 273db350b084dc2cf816288643861ce07b0562dd723Shaohua Li if (!dock_station_count) 274c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown return 0; 275c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 276db350b084dc2cf816288643861ce07b0562dd723Shaohua Li if (is_dock(handle)) 277c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown return 1; 278db350b084dc2cf816288643861ce07b0562dd723Shaohua Li list_for_each_entry(dock_station, &dock_stations, sibiling) { 279db350b084dc2cf816288643861ce07b0562dd723Shaohua Li if (find_dock_dependent_device(dock_station, handle)) 280db350b084dc2cf816288643861ce07b0562dd723Shaohua Li return 1; 281db350b084dc2cf816288643861ce07b0562dd723Shaohua Li } 282c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 283c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown return 0; 284c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown} 285c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 286c8f7a62cdde461914c6457d5f4362538ed810bf4Len BrownEXPORT_SYMBOL_GPL(is_dock_device); 287c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 288c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown/** 289c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * dock_present - see if the dock station is present. 290c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * @ds: the dock station 291c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * 292c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * execute the _STA method. note that present does not 293c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * imply that we are docked. 294c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown */ 295c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brownstatic int dock_present(struct dock_station *ds) 296c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown{ 297c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown unsigned long sta; 298c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown acpi_status status; 299c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 300c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown if (ds) { 301c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown status = acpi_evaluate_integer(ds->handle, "_STA", NULL, &sta); 302c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown if (ACPI_SUCCESS(status) && sta) 303c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown return 1; 304c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown } 305c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown return 0; 306c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown} 307c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 308c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 309c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 310c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown/** 311c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * dock_create_acpi_device - add new devices to acpi 312c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * @handle - handle of the device to add 313c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * 314c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * This function will create a new acpi_device for the given 315c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * handle if one does not exist already. This should cause 316c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * acpi to scan for drivers for the given devices, and call 317c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * matching driver's add routine. 318c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * 319c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * Returns a pointer to the acpi_device corresponding to the handle. 320c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown */ 321c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brownstatic struct acpi_device * dock_create_acpi_device(acpi_handle handle) 322c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown{ 323c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown struct acpi_device *device = NULL; 324c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown struct acpi_device *parent_device; 325c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown acpi_handle parent; 326c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown int ret; 327c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 328c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown if (acpi_bus_get_device(handle, &device)) { 329c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown /* 330c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * no device created for this object, 331c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * so we should create one. 332c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown */ 333c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown acpi_get_parent(handle, &parent); 334c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown if (acpi_bus_get_device(parent, &parent_device)) 335c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown parent_device = NULL; 336c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 337c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown ret = acpi_bus_add(&device, parent_device, handle, 338c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown ACPI_BUS_TYPE_DEVICE); 339c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown if (ret) { 340c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown pr_debug("error adding bus, %x\n", 341c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown -ret); 342c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown return NULL; 343c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown } 344c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown } 345c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown return device; 346c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown} 347c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 348c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown/** 349c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * dock_remove_acpi_device - remove the acpi_device struct from acpi 350c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * @handle - the handle of the device to remove 351c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * 352c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * Tell acpi to remove the acpi_device. This should cause any loaded 353c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * driver to have it's remove routine called. 354c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown */ 355c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brownstatic void dock_remove_acpi_device(acpi_handle handle) 356c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown{ 357c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown struct acpi_device *device; 358c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown int ret; 359c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 360c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown if (!acpi_bus_get_device(handle, &device)) { 361c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown ret = acpi_bus_trim(device, 1); 362c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown if (ret) 363c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown pr_debug("error removing bus, %x\n", -ret); 364c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown } 365c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown} 366c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 367c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 368c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown/** 369c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * hotplug_dock_devices - insert or remove devices on the dock station 370c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * @ds: the dock station 371c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * @event: either bus check or eject request 372c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * 373c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * Some devices on the dock station need to have drivers called 374c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * to perform hotplug operations after a dock event has occurred. 375c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * Traverse the list of dock devices that have registered a 376c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * hotplug handler, and call the handler. 377c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown */ 378c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brownstatic void hotplug_dock_devices(struct dock_station *ds, u32 event) 379c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown{ 380c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown struct dock_dependent_device *dd; 381c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 3828b0dc866dd9b8d10a53cb3537385a51b7ee54b62Kristen Carlson Accardi mutex_lock(&ds->hp_lock); 383c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 384c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown /* 385c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * First call driver specific hotplug functions 386c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown */ 387c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown list_for_each_entry(dd, &ds->hotplug_devices, hotplug_list) { 3881253f7aabfebc51446dbec5c8895c5c8846dfe06Shaohua Li if (dd->ops && dd->ops->handler) 3891253f7aabfebc51446dbec5c8895c5c8846dfe06Shaohua Li dd->ops->handler(dd->handle, event, dd->context); 390c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown } 391c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 392c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown /* 393c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * Now make sure that an acpi_device is created for each 394c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * dependent device, or removed if this is an eject request. 395c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * This will cause acpi_drivers to be stopped/started if they 396c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * exist 397c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown */ 398c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown list_for_each_entry(dd, &ds->dependent_devices, list) { 399c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown if (event == ACPI_NOTIFY_EJECT_REQUEST) 400c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown dock_remove_acpi_device(dd->handle); 401c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown else 402c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown dock_create_acpi_device(dd->handle); 403c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown } 4048b0dc866dd9b8d10a53cb3537385a51b7ee54b62Kristen Carlson Accardi mutex_unlock(&ds->hp_lock); 405c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown} 406c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 407c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brownstatic void dock_event(struct dock_station *ds, u32 event, int num) 408c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown{ 409db350b084dc2cf816288643861ce07b0562dd723Shaohua Li struct device *dev = &ds->dock_device->dev; 41066b568218ab73be161dc109b913e6fa7dda44e16Holger Macht char event_string[13]; 41179a8f70b4b9127eacfc91dd1436c4a7be05e62abKristen Carlson Accardi char *envp[] = { event_string, NULL }; 4121253f7aabfebc51446dbec5c8895c5c8846dfe06Shaohua Li struct dock_dependent_device *dd; 41379a8f70b4b9127eacfc91dd1436c4a7be05e62abKristen Carlson Accardi 41479a8f70b4b9127eacfc91dd1436c4a7be05e62abKristen Carlson Accardi if (num == UNDOCK_EVENT) 41566b568218ab73be161dc109b913e6fa7dda44e16Holger Macht sprintf(event_string, "EVENT=undock"); 41679a8f70b4b9127eacfc91dd1436c4a7be05e62abKristen Carlson Accardi else 41766b568218ab73be161dc109b913e6fa7dda44e16Holger Macht sprintf(event_string, "EVENT=dock"); 41879a8f70b4b9127eacfc91dd1436c4a7be05e62abKristen Carlson Accardi 4195669021e40964303994a20633548732c6bb26636Kristen Carlson Accardi /* 4208ea86e0ba7c9d16ae0f35cb0c4165194fa573f7aKristen Carlson Accardi * Indicate that the status of the dock station has 4218ea86e0ba7c9d16ae0f35cb0c4165194fa573f7aKristen Carlson Accardi * changed. 4225669021e40964303994a20633548732c6bb26636Kristen Carlson Accardi */ 4231253f7aabfebc51446dbec5c8895c5c8846dfe06Shaohua Li if (num == DOCK_EVENT) 4241253f7aabfebc51446dbec5c8895c5c8846dfe06Shaohua Li kobject_uevent_env(&dev->kobj, KOBJ_CHANGE, envp); 4251253f7aabfebc51446dbec5c8895c5c8846dfe06Shaohua Li 4261253f7aabfebc51446dbec5c8895c5c8846dfe06Shaohua Li list_for_each_entry(dd, &ds->hotplug_devices, hotplug_list) 4271253f7aabfebc51446dbec5c8895c5c8846dfe06Shaohua Li if (dd->ops && dd->ops->uevent) 4281253f7aabfebc51446dbec5c8895c5c8846dfe06Shaohua Li dd->ops->uevent(dd->handle, event, dd->context); 4291253f7aabfebc51446dbec5c8895c5c8846dfe06Shaohua Li if (num != DOCK_EVENT) 4301253f7aabfebc51446dbec5c8895c5c8846dfe06Shaohua Li kobject_uevent_env(&dev->kobj, KOBJ_CHANGE, envp); 431c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown} 432c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 433c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown/** 434c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * eject_dock - respond to a dock eject request 435c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * @ds: the dock station 436c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * 437c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * This is called after _DCK is called, to execute the dock station's 438c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * _EJ0 method. 439c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown */ 440c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brownstatic void eject_dock(struct dock_station *ds) 441c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown{ 442c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown struct acpi_object_list arg_list; 443c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown union acpi_object arg; 444c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown acpi_status status; 445c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown acpi_handle tmp; 446c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 447c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown /* all dock devices should have _EJ0, but check anyway */ 448c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown status = acpi_get_handle(ds->handle, "_EJ0", &tmp); 449c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown if (ACPI_FAILURE(status)) { 450c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown pr_debug("No _EJ0 support for dock device\n"); 451c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown return; 452c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown } 453c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 454c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown arg_list.count = 1; 455c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown arg_list.pointer = &arg; 456c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown arg.type = ACPI_TYPE_INTEGER; 457c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown arg.integer.value = 1; 458c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 459c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown if (ACPI_FAILURE(acpi_evaluate_object(ds->handle, "_EJ0", 460c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown &arg_list, NULL))) 461c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown pr_debug("Failed to evaluate _EJ0!\n"); 462c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown} 463c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 464c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown/** 465c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * handle_dock - handle a dock event 466c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * @ds: the dock station 467c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * @dock: to dock, or undock - that is the question 468c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * 469c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * Execute the _DCK method in response to an acpi event 470c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown */ 471c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brownstatic void handle_dock(struct dock_station *ds, int dock) 472c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown{ 473c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown acpi_status status; 474c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown struct acpi_object_list arg_list; 475c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown union acpi_object arg; 476c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 477c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown struct acpi_buffer name_buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 478c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 479c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown acpi_get_name(ds->handle, ACPI_FULL_PATHNAME, &name_buffer); 480c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 4819254bc845db90a123cf992e983539d0ee409f22aDmitry Torokhov printk(KERN_INFO PREFIX "%s - %s\n", 4829254bc845db90a123cf992e983539d0ee409f22aDmitry Torokhov (char *)name_buffer.pointer, dock ? "docking" : "undocking"); 483c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 484c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown /* _DCK method has one argument */ 485c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown arg_list.count = 1; 486c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown arg_list.pointer = &arg; 487c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown arg.type = ACPI_TYPE_INTEGER; 488c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown arg.integer.value = dock; 489c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown status = acpi_evaluate_object(ds->handle, "_DCK", &arg_list, &buffer); 490db350b084dc2cf816288643861ce07b0562dd723Shaohua Li if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) 4910a918a9432cc30aede10f904253b66ea6ab485acThomas Renninger ACPI_EXCEPTION((AE_INFO, status, "%s - failed to execute" 4920a918a9432cc30aede10f904253b66ea6ab485acThomas Renninger " _DCK\n", (char *)name_buffer.pointer)); 4930a918a9432cc30aede10f904253b66ea6ab485acThomas Renninger 494c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown kfree(buffer.pointer); 495c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown kfree(name_buffer.pointer); 496c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown} 497c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 498c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brownstatic inline void dock(struct dock_station *ds) 499c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown{ 500c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown handle_dock(ds, 1); 501c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown} 502c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 503c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brownstatic inline void undock(struct dock_station *ds) 504c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown{ 505c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown handle_dock(ds, 0); 506c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown} 507c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 508c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brownstatic inline void begin_dock(struct dock_station *ds) 509c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown{ 510c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown ds->flags |= DOCK_DOCKING; 511c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown} 512c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 513c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brownstatic inline void complete_dock(struct dock_station *ds) 514c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown{ 515c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown ds->flags &= ~(DOCK_DOCKING); 516c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown ds->last_dock_time = jiffies; 517c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown} 518c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 519a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardistatic inline void begin_undock(struct dock_station *ds) 520a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardi{ 521a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardi ds->flags |= DOCK_UNDOCKING; 522a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardi} 523a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardi 524a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardistatic inline void complete_undock(struct dock_station *ds) 525a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardi{ 526a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardi ds->flags &= ~(DOCK_UNDOCKING); 527a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardi} 528a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardi 529406f692d0803d73acd3984c1e11719d3a913fd5eShaohua Listatic void dock_lock(struct dock_station *ds, int lock) 530406f692d0803d73acd3984c1e11719d3a913fd5eShaohua Li{ 531406f692d0803d73acd3984c1e11719d3a913fd5eShaohua Li struct acpi_object_list arg_list; 532406f692d0803d73acd3984c1e11719d3a913fd5eShaohua Li union acpi_object arg; 533406f692d0803d73acd3984c1e11719d3a913fd5eShaohua Li acpi_status status; 534406f692d0803d73acd3984c1e11719d3a913fd5eShaohua Li 535406f692d0803d73acd3984c1e11719d3a913fd5eShaohua Li arg_list.count = 1; 536406f692d0803d73acd3984c1e11719d3a913fd5eShaohua Li arg_list.pointer = &arg; 537406f692d0803d73acd3984c1e11719d3a913fd5eShaohua Li arg.type = ACPI_TYPE_INTEGER; 538406f692d0803d73acd3984c1e11719d3a913fd5eShaohua Li arg.integer.value = !!lock; 539406f692d0803d73acd3984c1e11719d3a913fd5eShaohua Li status = acpi_evaluate_object(ds->handle, "_LCK", &arg_list, NULL); 540406f692d0803d73acd3984c1e11719d3a913fd5eShaohua Li if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { 541406f692d0803d73acd3984c1e11719d3a913fd5eShaohua Li if (lock) 542406f692d0803d73acd3984c1e11719d3a913fd5eShaohua Li printk(KERN_WARNING PREFIX "Locking device failed\n"); 543406f692d0803d73acd3984c1e11719d3a913fd5eShaohua Li else 544406f692d0803d73acd3984c1e11719d3a913fd5eShaohua Li printk(KERN_WARNING PREFIX "Unlocking device failed\n"); 545406f692d0803d73acd3984c1e11719d3a913fd5eShaohua Li } 546406f692d0803d73acd3984c1e11719d3a913fd5eShaohua Li} 547406f692d0803d73acd3984c1e11719d3a913fd5eShaohua Li 548c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown/** 549c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * dock_in_progress - see if we are in the middle of handling a dock event 550c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * @ds: the dock station 551c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * 552c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * Sometimes while docking, false dock events can be sent to the driver 553c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * because good connections aren't made or some other reason. Ignore these 554c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * if we are in the middle of doing something. 555c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown */ 556c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brownstatic int dock_in_progress(struct dock_station *ds) 557c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown{ 558c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown if ((ds->flags & DOCK_DOCKING) || 559c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown time_before(jiffies, (ds->last_dock_time + HZ))) 560c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown return 1; 561c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown return 0; 562c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown} 563c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 564c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown/** 565c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * register_dock_notifier - add yourself to the dock notifier list 566c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * @nb: the callers notifier block 567c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * 568c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * If a driver wishes to be notified about dock events, they can 569c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * use this function to put a notifier block on the dock notifier list. 570c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * this notifier call chain will be called after a dock event, but 571c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * before hotplugging any new devices. 572c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown */ 573c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brownint register_dock_notifier(struct notifier_block *nb) 574c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown{ 575db350b084dc2cf816288643861ce07b0562dd723Shaohua Li if (!dock_station_count) 5762548c06b72396e28abdb5dd572ab589c3c22f4b9Prarit Bhargava return -ENODEV; 5772548c06b72396e28abdb5dd572ab589c3c22f4b9Prarit Bhargava 578c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown return atomic_notifier_chain_register(&dock_notifier_list, nb); 579c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown} 580c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 581c8f7a62cdde461914c6457d5f4362538ed810bf4Len BrownEXPORT_SYMBOL_GPL(register_dock_notifier); 582c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 583c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown/** 584c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * unregister_dock_notifier - remove yourself from the dock notifier list 585c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * @nb: the callers notifier block 586c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown */ 587c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brownvoid unregister_dock_notifier(struct notifier_block *nb) 588c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown{ 589db350b084dc2cf816288643861ce07b0562dd723Shaohua Li if (!dock_station_count) 5902548c06b72396e28abdb5dd572ab589c3c22f4b9Prarit Bhargava return; 5912548c06b72396e28abdb5dd572ab589c3c22f4b9Prarit Bhargava 592c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown atomic_notifier_chain_unregister(&dock_notifier_list, nb); 593c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown} 594c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 595c8f7a62cdde461914c6457d5f4362538ed810bf4Len BrownEXPORT_SYMBOL_GPL(unregister_dock_notifier); 596c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 597c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown/** 598c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * register_hotplug_dock_device - register a hotplug function 599c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * @handle: the handle of the device 6001253f7aabfebc51446dbec5c8895c5c8846dfe06Shaohua Li * @ops: handlers to call after docking 601c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * @context: device specific data 602c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * 603c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * If a driver would like to perform a hotplug operation after a dock 604c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * event, they can register an acpi_notifiy_handler to be called by 605c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * the dock driver after _DCK is executed. 606c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown */ 607c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brownint 6081253f7aabfebc51446dbec5c8895c5c8846dfe06Shaohua Liregister_hotplug_dock_device(acpi_handle handle, struct acpi_dock_ops *ops, 609c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown void *context) 610c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown{ 611c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown struct dock_dependent_device *dd; 612db350b084dc2cf816288643861ce07b0562dd723Shaohua Li struct dock_station *dock_station; 61361b836958371c717d1e6d4fea1d2c512969ad20bShaohua Li int ret = -EINVAL; 614c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 615db350b084dc2cf816288643861ce07b0562dd723Shaohua Li if (!dock_station_count) 616c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown return -ENODEV; 617c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 618c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown /* 619c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * make sure this handle is for a device dependent on the dock, 620c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * this would include the dock station itself 621c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown */ 622db350b084dc2cf816288643861ce07b0562dd723Shaohua Li list_for_each_entry(dock_station, &dock_stations, sibiling) { 62361b836958371c717d1e6d4fea1d2c512969ad20bShaohua Li /* 62461b836958371c717d1e6d4fea1d2c512969ad20bShaohua Li * An ATA bay can be in a dock and itself can be ejected 62561b836958371c717d1e6d4fea1d2c512969ad20bShaohua Li * seperately, so there are two 'dock stations' which need the 62661b836958371c717d1e6d4fea1d2c512969ad20bShaohua Li * ops 62761b836958371c717d1e6d4fea1d2c512969ad20bShaohua Li */ 628db350b084dc2cf816288643861ce07b0562dd723Shaohua Li dd = find_dock_dependent_device(dock_station, handle); 629db350b084dc2cf816288643861ce07b0562dd723Shaohua Li if (dd) { 6301253f7aabfebc51446dbec5c8895c5c8846dfe06Shaohua Li dd->ops = ops; 631db350b084dc2cf816288643861ce07b0562dd723Shaohua Li dd->context = context; 632db350b084dc2cf816288643861ce07b0562dd723Shaohua Li dock_add_hotplug_device(dock_station, dd); 63361b836958371c717d1e6d4fea1d2c512969ad20bShaohua Li ret = 0; 634db350b084dc2cf816288643861ce07b0562dd723Shaohua Li } 635c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown } 636c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 63761b836958371c717d1e6d4fea1d2c512969ad20bShaohua Li return ret; 638c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown} 639c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 640c8f7a62cdde461914c6457d5f4362538ed810bf4Len BrownEXPORT_SYMBOL_GPL(register_hotplug_dock_device); 641c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 642c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown/** 643c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * unregister_hotplug_dock_device - remove yourself from the hotplug list 644c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * @handle: the acpi handle of the device 645c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown */ 646c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brownvoid unregister_hotplug_dock_device(acpi_handle handle) 647c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown{ 648c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown struct dock_dependent_device *dd; 649db350b084dc2cf816288643861ce07b0562dd723Shaohua Li struct dock_station *dock_station; 650c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 651db350b084dc2cf816288643861ce07b0562dd723Shaohua Li if (!dock_station_count) 652c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown return; 653c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 654db350b084dc2cf816288643861ce07b0562dd723Shaohua Li list_for_each_entry(dock_station, &dock_stations, sibiling) { 655db350b084dc2cf816288643861ce07b0562dd723Shaohua Li dd = find_dock_dependent_device(dock_station, handle); 656db350b084dc2cf816288643861ce07b0562dd723Shaohua Li if (dd) 657db350b084dc2cf816288643861ce07b0562dd723Shaohua Li dock_del_hotplug_device(dock_station, dd); 658db350b084dc2cf816288643861ce07b0562dd723Shaohua Li } 659c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown} 660c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 661c8f7a62cdde461914c6457d5f4362538ed810bf4Len BrownEXPORT_SYMBOL_GPL(unregister_hotplug_dock_device); 662c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 663c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown/** 664c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org * handle_eject_request - handle an undock request checking for error conditions 665c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org * 666c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org * Check to make sure the dock device is still present, then undock and 667c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org * hotremove all the devices that may need removing. 668c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org */ 669c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.orgstatic int handle_eject_request(struct dock_station *ds, u32 event) 670c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org{ 671c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org if (dock_in_progress(ds)) 672c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org return -EBUSY; 673c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org 674c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org /* 675c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org * here we need to generate the undock 676c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org * event prior to actually doing the undock 677c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org * so that the device struct still exists. 678afd7301ddb762b66bf1831b0820b402e5d2c439dHolger Macht * Also, even send the dock event if the 679afd7301ddb762b66bf1831b0820b402e5d2c439dHolger Macht * device is not present anymore 680c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org */ 681c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org dock_event(ds, event, UNDOCK_EVENT); 682afd7301ddb762b66bf1831b0820b402e5d2c439dHolger Macht 683c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org hotplug_dock_devices(ds, ACPI_NOTIFY_EJECT_REQUEST); 684c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org undock(ds); 685406f692d0803d73acd3984c1e11719d3a913fd5eShaohua Li dock_lock(ds, 0); 686c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org eject_dock(ds); 687c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org if (dock_present(ds)) { 688c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org printk(KERN_ERR PREFIX "Unable to undock!\n"); 689c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org return -EBUSY; 690c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org } 691a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardi complete_undock(ds); 692c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org return 0; 693c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org} 694c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org 695c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org/** 696c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * dock_notify - act upon an acpi dock notification 697c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * @handle: the dock station handle 698c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * @event: the acpi event 699c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * @data: our driver data struct 700c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * 701c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * If we are notified to dock, then check to see if the dock is 702c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * present and then dock. Notify all drivers of the dock event, 703c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org * and then hotplug and devices that may need hotplugging. 704c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown */ 705c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brownstatic void dock_notify(acpi_handle handle, u32 event, void *data) 706c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown{ 70750dd096973f1d95aa03c6a6d9e148d706b62b68eJan Engelhardt struct dock_station *ds = data; 7088b59560a3baf2e7c24e0fb92ea5d09eca92805dbShaohua Li struct acpi_device *tmp; 709db350b084dc2cf816288643861ce07b0562dd723Shaohua Li int surprise_removal = 0; 710c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 711db350b084dc2cf816288643861ce07b0562dd723Shaohua Li /* 712db350b084dc2cf816288643861ce07b0562dd723Shaohua Li * According to acpi spec 3.0a, if a DEVICE_CHECK notification 713db350b084dc2cf816288643861ce07b0562dd723Shaohua Li * is sent and _DCK is present, it is assumed to mean an undock 714db350b084dc2cf816288643861ce07b0562dd723Shaohua Li * request. 715db350b084dc2cf816288643861ce07b0562dd723Shaohua Li */ 716db350b084dc2cf816288643861ce07b0562dd723Shaohua Li if ((ds->flags & DOCK_IS_DOCK) && event == ACPI_NOTIFY_DEVICE_CHECK) 717db350b084dc2cf816288643861ce07b0562dd723Shaohua Li event = ACPI_NOTIFY_EJECT_REQUEST; 718db350b084dc2cf816288643861ce07b0562dd723Shaohua Li 719db350b084dc2cf816288643861ce07b0562dd723Shaohua Li /* 720db350b084dc2cf816288643861ce07b0562dd723Shaohua Li * dock station: BUS_CHECK - docked or surprise removal 721db350b084dc2cf816288643861ce07b0562dd723Shaohua Li * DEVICE_CHECK - undocked 722db350b084dc2cf816288643861ce07b0562dd723Shaohua Li * other device: BUS_CHECK/DEVICE_CHECK - added or surprise removal 723db350b084dc2cf816288643861ce07b0562dd723Shaohua Li * 724db350b084dc2cf816288643861ce07b0562dd723Shaohua Li * To simplify event handling, dock dependent device handler always 725db350b084dc2cf816288643861ce07b0562dd723Shaohua Li * get ACPI_NOTIFY_BUS_CHECK/ACPI_NOTIFY_DEVICE_CHECK for add and 726db350b084dc2cf816288643861ce07b0562dd723Shaohua Li * ACPI_NOTIFY_EJECT_REQUEST for removal 727db350b084dc2cf816288643861ce07b0562dd723Shaohua Li */ 728c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown switch (event) { 729c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown case ACPI_NOTIFY_BUS_CHECK: 730db350b084dc2cf816288643861ce07b0562dd723Shaohua Li case ACPI_NOTIFY_DEVICE_CHECK: 7318b59560a3baf2e7c24e0fb92ea5d09eca92805dbShaohua Li if (!dock_in_progress(ds) && acpi_bus_get_device(ds->handle, 7328b59560a3baf2e7c24e0fb92ea5d09eca92805dbShaohua Li &tmp)) { 733c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown begin_dock(ds); 734c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown dock(ds); 735c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown if (!dock_present(ds)) { 736c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown printk(KERN_ERR PREFIX "Unable to dock!\n"); 7378b59560a3baf2e7c24e0fb92ea5d09eca92805dbShaohua Li complete_dock(ds); 738c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown break; 739c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown } 740c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown atomic_notifier_call_chain(&dock_notifier_list, 741c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown event, NULL); 742c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown hotplug_dock_devices(ds, event); 743c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown complete_dock(ds); 744c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown dock_event(ds, event, DOCK_EVENT); 745406f692d0803d73acd3984c1e11719d3a913fd5eShaohua Li dock_lock(ds, 1); 746db350b084dc2cf816288643861ce07b0562dd723Shaohua Li break; 747c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown } 748db350b084dc2cf816288643861ce07b0562dd723Shaohua Li if (dock_present(ds) || dock_in_progress(ds)) 749db350b084dc2cf816288643861ce07b0562dd723Shaohua Li break; 750db350b084dc2cf816288643861ce07b0562dd723Shaohua Li /* This is a surprise removal */ 751db350b084dc2cf816288643861ce07b0562dd723Shaohua Li surprise_removal = 1; 752db350b084dc2cf816288643861ce07b0562dd723Shaohua Li event = ACPI_NOTIFY_EJECT_REQUEST; 753db350b084dc2cf816288643861ce07b0562dd723Shaohua Li /* Fall back */ 754c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown case ACPI_NOTIFY_EJECT_REQUEST: 755a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardi begin_undock(ds); 756f730ae1838635a02aa60834762c61566911d004cShaohua Li if ((immediate_undock && !(ds->flags & DOCK_IS_ATA)) 757f730ae1838635a02aa60834762c61566911d004cShaohua Li || surprise_removal) 758a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardi handle_eject_request(ds, event); 759a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardi else 760a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardi dock_event(ds, event, UNDOCK_EVENT); 761c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown break; 762c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown default: 763c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown printk(KERN_ERR PREFIX "Unknown dock event %d\n", event); 764c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown } 765c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown} 766c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 76719cd847ab24fefe9e50101ec94479e0400a08650Zhang Ruistruct dock_data { 76819cd847ab24fefe9e50101ec94479e0400a08650Zhang Rui acpi_handle handle; 76919cd847ab24fefe9e50101ec94479e0400a08650Zhang Rui unsigned long event; 77019cd847ab24fefe9e50101ec94479e0400a08650Zhang Rui struct dock_station *ds; 77119cd847ab24fefe9e50101ec94479e0400a08650Zhang Rui}; 77219cd847ab24fefe9e50101ec94479e0400a08650Zhang Rui 77319cd847ab24fefe9e50101ec94479e0400a08650Zhang Ruistatic void acpi_dock_deferred_cb(void *context) 77419cd847ab24fefe9e50101ec94479e0400a08650Zhang Rui{ 77519cd847ab24fefe9e50101ec94479e0400a08650Zhang Rui struct dock_data *data = (struct dock_data *)context; 77619cd847ab24fefe9e50101ec94479e0400a08650Zhang Rui 77719cd847ab24fefe9e50101ec94479e0400a08650Zhang Rui dock_notify(data->handle, data->event, data->ds); 77819cd847ab24fefe9e50101ec94479e0400a08650Zhang Rui kfree(data); 77919cd847ab24fefe9e50101ec94479e0400a08650Zhang Rui} 78019cd847ab24fefe9e50101ec94479e0400a08650Zhang Rui 7816bd00a61ab63d4ceb635ae0316353c11c900b8d8Shaohua Listatic int acpi_dock_notifier_call(struct notifier_block *this, 7826bd00a61ab63d4ceb635ae0316353c11c900b8d8Shaohua Li unsigned long event, void *data) 7836bd00a61ab63d4ceb635ae0316353c11c900b8d8Shaohua Li{ 7846bd00a61ab63d4ceb635ae0316353c11c900b8d8Shaohua Li struct dock_station *dock_station; 7856bd00a61ab63d4ceb635ae0316353c11c900b8d8Shaohua Li acpi_handle handle = (acpi_handle)data; 7866bd00a61ab63d4ceb635ae0316353c11c900b8d8Shaohua Li 7876bd00a61ab63d4ceb635ae0316353c11c900b8d8Shaohua Li if (event != ACPI_NOTIFY_BUS_CHECK && event != ACPI_NOTIFY_DEVICE_CHECK 7886bd00a61ab63d4ceb635ae0316353c11c900b8d8Shaohua Li && event != ACPI_NOTIFY_EJECT_REQUEST) 7896bd00a61ab63d4ceb635ae0316353c11c900b8d8Shaohua Li return 0; 7906bd00a61ab63d4ceb635ae0316353c11c900b8d8Shaohua Li list_for_each_entry(dock_station, &dock_stations, sibiling) { 7916bd00a61ab63d4ceb635ae0316353c11c900b8d8Shaohua Li if (dock_station->handle == handle) { 79219cd847ab24fefe9e50101ec94479e0400a08650Zhang Rui struct dock_data *dock_data; 79319cd847ab24fefe9e50101ec94479e0400a08650Zhang Rui 79419cd847ab24fefe9e50101ec94479e0400a08650Zhang Rui dock_data = kmalloc(sizeof(*dock_data), GFP_KERNEL); 79519cd847ab24fefe9e50101ec94479e0400a08650Zhang Rui if (!dock_data) 79619cd847ab24fefe9e50101ec94479e0400a08650Zhang Rui return 0; 79719cd847ab24fefe9e50101ec94479e0400a08650Zhang Rui dock_data->handle = handle; 79819cd847ab24fefe9e50101ec94479e0400a08650Zhang Rui dock_data->event = event; 79919cd847ab24fefe9e50101ec94479e0400a08650Zhang Rui dock_data->ds = dock_station; 80019cd847ab24fefe9e50101ec94479e0400a08650Zhang Rui acpi_os_hotplug_execute(acpi_dock_deferred_cb, 80119cd847ab24fefe9e50101ec94479e0400a08650Zhang Rui dock_data); 8026bd00a61ab63d4ceb635ae0316353c11c900b8d8Shaohua Li return 0 ; 8036bd00a61ab63d4ceb635ae0316353c11c900b8d8Shaohua Li } 8046bd00a61ab63d4ceb635ae0316353c11c900b8d8Shaohua Li } 8056bd00a61ab63d4ceb635ae0316353c11c900b8d8Shaohua Li return 0; 8066bd00a61ab63d4ceb635ae0316353c11c900b8d8Shaohua Li} 8076bd00a61ab63d4ceb635ae0316353c11c900b8d8Shaohua Li 8086bd00a61ab63d4ceb635ae0316353c11c900b8d8Shaohua Listatic struct notifier_block dock_acpi_notifier = { 8096bd00a61ab63d4ceb635ae0316353c11c900b8d8Shaohua Li .notifier_call = acpi_dock_notifier_call, 8106bd00a61ab63d4ceb635ae0316353c11c900b8d8Shaohua Li}; 8116bd00a61ab63d4ceb635ae0316353c11c900b8d8Shaohua Li 812c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown/** 813c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * find_dock_devices - find devices on the dock station 814c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * @handle: the handle of the device we are examining 815c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * @lvl: unused 816c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * @context: the dock station private data 817c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * @rv: unused 818c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * 819c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * This function is called by acpi_walk_namespace. It will 820c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * check to see if an object has an _EJD method. If it does, then it 821c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * will see if it is dependent on the dock station. 822c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown */ 823c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brownstatic acpi_status 824c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brownfind_dock_devices(acpi_handle handle, u32 lvl, void *context, void **rv) 825c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown{ 826c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown acpi_status status; 827fe9a2f77e5ad508b18671571c0b3f6f79ea709a8Kristen Carlson Accardi acpi_handle tmp, parent; 82850dd096973f1d95aa03c6a6d9e148d706b62b68eJan Engelhardt struct dock_station *ds = context; 829c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown struct dock_dependent_device *dd; 830c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 831c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown status = acpi_bus_get_ejd(handle, &tmp); 832fe9a2f77e5ad508b18671571c0b3f6f79ea709a8Kristen Carlson Accardi if (ACPI_FAILURE(status)) { 833fe9a2f77e5ad508b18671571c0b3f6f79ea709a8Kristen Carlson Accardi /* try the parent device as well */ 834fe9a2f77e5ad508b18671571c0b3f6f79ea709a8Kristen Carlson Accardi status = acpi_get_parent(handle, &parent); 835fe9a2f77e5ad508b18671571c0b3f6f79ea709a8Kristen Carlson Accardi if (ACPI_FAILURE(status)) 836fe9a2f77e5ad508b18671571c0b3f6f79ea709a8Kristen Carlson Accardi goto fdd_out; 837fe9a2f77e5ad508b18671571c0b3f6f79ea709a8Kristen Carlson Accardi /* see if parent is dependent on dock */ 838fe9a2f77e5ad508b18671571c0b3f6f79ea709a8Kristen Carlson Accardi status = acpi_bus_get_ejd(parent, &tmp); 839fe9a2f77e5ad508b18671571c0b3f6f79ea709a8Kristen Carlson Accardi if (ACPI_FAILURE(status)) 840fe9a2f77e5ad508b18671571c0b3f6f79ea709a8Kristen Carlson Accardi goto fdd_out; 841fe9a2f77e5ad508b18671571c0b3f6f79ea709a8Kristen Carlson Accardi } 842c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 843c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown if (tmp == ds->handle) { 844c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown dd = alloc_dock_dependent_device(handle); 845c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown if (dd) 846c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown add_dock_dependent_device(ds, dd); 847c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown } 848fe9a2f77e5ad508b18671571c0b3f6f79ea709a8Kristen Carlson Accardifdd_out: 849c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown return AE_OK; 850c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown} 851c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 852c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org/* 853c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org * show_docked - read method for "docked" file in sysfs 854c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org */ 855c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.orgstatic ssize_t show_docked(struct device *dev, 856c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org struct device_attribute *attr, char *buf) 857c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org{ 858db350b084dc2cf816288643861ce07b0562dd723Shaohua Li struct dock_station *dock_station = *((struct dock_station **) 859db350b084dc2cf816288643861ce07b0562dd723Shaohua Li dev->platform_data); 860c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org return snprintf(buf, PAGE_SIZE, "%d\n", dock_present(dock_station)); 861c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org 862c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org} 863e5685b9d35c2cc0a98425b05df30cb837dd1e632Adrian Bunkstatic DEVICE_ATTR(docked, S_IRUGO, show_docked, NULL); 864c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org 865c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org/* 866a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardi * show_flags - read method for flags file in sysfs 867a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardi */ 868a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardistatic ssize_t show_flags(struct device *dev, 869a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardi struct device_attribute *attr, char *buf) 870a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardi{ 871db350b084dc2cf816288643861ce07b0562dd723Shaohua Li struct dock_station *dock_station = *((struct dock_station **) 872db350b084dc2cf816288643861ce07b0562dd723Shaohua Li dev->platform_data); 873a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardi return snprintf(buf, PAGE_SIZE, "%d\n", dock_station->flags); 874a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardi 875a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardi} 876e5685b9d35c2cc0a98425b05df30cb837dd1e632Adrian Bunkstatic DEVICE_ATTR(flags, S_IRUGO, show_flags, NULL); 877a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardi 878a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardi/* 879c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org * write_undock - write method for "undock" file in sysfs 880c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org */ 881c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.orgstatic ssize_t write_undock(struct device *dev, struct device_attribute *attr, 882c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org const char *buf, size_t count) 883c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org{ 884c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org int ret; 885db350b084dc2cf816288643861ce07b0562dd723Shaohua Li struct dock_station *dock_station = *((struct dock_station **) 886db350b084dc2cf816288643861ce07b0562dd723Shaohua Li dev->platform_data); 887c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org 888c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org if (!count) 889c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org return -EINVAL; 890c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org 8919171f83488940e4ff85f1b7137773eb1f306cdefHolger Macht begin_undock(dock_station); 892c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org ret = handle_eject_request(dock_station, ACPI_NOTIFY_EJECT_REQUEST); 893c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org return ret ? ret: count; 894c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org} 895e5685b9d35c2cc0a98425b05df30cb837dd1e632Adrian Bunkstatic DEVICE_ATTR(undock, S_IWUSR, NULL, write_undock); 896c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org 897ac122bb64b0d51f0512185d3522a75f3f3a80bc9Ilya A. Volynets-Evenbakh/* 898ac122bb64b0d51f0512185d3522a75f3f3a80bc9Ilya A. Volynets-Evenbakh * show_dock_uid - read method for "uid" file in sysfs 899ac122bb64b0d51f0512185d3522a75f3f3a80bc9Ilya A. Volynets-Evenbakh */ 900ac122bb64b0d51f0512185d3522a75f3f3a80bc9Ilya A. Volynets-Evenbakhstatic ssize_t show_dock_uid(struct device *dev, 901ac122bb64b0d51f0512185d3522a75f3f3a80bc9Ilya A. Volynets-Evenbakh struct device_attribute *attr, char *buf) 902ac122bb64b0d51f0512185d3522a75f3f3a80bc9Ilya A. Volynets-Evenbakh{ 903ac122bb64b0d51f0512185d3522a75f3f3a80bc9Ilya A. Volynets-Evenbakh unsigned long lbuf; 904db350b084dc2cf816288643861ce07b0562dd723Shaohua Li struct dock_station *dock_station = *((struct dock_station **) 905db350b084dc2cf816288643861ce07b0562dd723Shaohua Li dev->platform_data); 90638ff4ffc039ba5a5878f2dcbb03d87c3a1f02f1bKristen Carlson Accardi acpi_status status = acpi_evaluate_integer(dock_station->handle, 90738ff4ffc039ba5a5878f2dcbb03d87c3a1f02f1bKristen Carlson Accardi "_UID", NULL, &lbuf); 90838ff4ffc039ba5a5878f2dcbb03d87c3a1f02f1bKristen Carlson Accardi if (ACPI_FAILURE(status)) 909ac122bb64b0d51f0512185d3522a75f3f3a80bc9Ilya A. Volynets-Evenbakh return 0; 91038ff4ffc039ba5a5878f2dcbb03d87c3a1f02f1bKristen Carlson Accardi 911ac122bb64b0d51f0512185d3522a75f3f3a80bc9Ilya A. Volynets-Evenbakh return snprintf(buf, PAGE_SIZE, "%lx\n", lbuf); 912ac122bb64b0d51f0512185d3522a75f3f3a80bc9Ilya A. Volynets-Evenbakh} 913e5685b9d35c2cc0a98425b05df30cb837dd1e632Adrian Bunkstatic DEVICE_ATTR(uid, S_IRUGO, show_dock_uid, NULL); 914ac122bb64b0d51f0512185d3522a75f3f3a80bc9Ilya A. Volynets-Evenbakh 9158652b00fd6416773f113dab3dfa0d4509def825bShaohua Listatic ssize_t show_dock_type(struct device *dev, 9168652b00fd6416773f113dab3dfa0d4509def825bShaohua Li struct device_attribute *attr, char *buf) 9178652b00fd6416773f113dab3dfa0d4509def825bShaohua Li{ 9188652b00fd6416773f113dab3dfa0d4509def825bShaohua Li struct dock_station *dock_station = *((struct dock_station **) 9198652b00fd6416773f113dab3dfa0d4509def825bShaohua Li dev->platform_data); 9208652b00fd6416773f113dab3dfa0d4509def825bShaohua Li char *type; 9218652b00fd6416773f113dab3dfa0d4509def825bShaohua Li 9228652b00fd6416773f113dab3dfa0d4509def825bShaohua Li if (dock_station->flags & DOCK_IS_DOCK) 9238652b00fd6416773f113dab3dfa0d4509def825bShaohua Li type = "dock_station"; 9248652b00fd6416773f113dab3dfa0d4509def825bShaohua Li else if (dock_station->flags & DOCK_IS_ATA) 9258652b00fd6416773f113dab3dfa0d4509def825bShaohua Li type = "ata_bay"; 9268652b00fd6416773f113dab3dfa0d4509def825bShaohua Li else if (dock_station->flags & DOCK_IS_BAT) 9278652b00fd6416773f113dab3dfa0d4509def825bShaohua Li type = "battery_bay"; 9288652b00fd6416773f113dab3dfa0d4509def825bShaohua Li else 9298652b00fd6416773f113dab3dfa0d4509def825bShaohua Li type = "unknown"; 9308652b00fd6416773f113dab3dfa0d4509def825bShaohua Li 9318652b00fd6416773f113dab3dfa0d4509def825bShaohua Li return snprintf(buf, PAGE_SIZE, "%s\n", type); 9328652b00fd6416773f113dab3dfa0d4509def825bShaohua Li} 9338652b00fd6416773f113dab3dfa0d4509def825bShaohua Listatic DEVICE_ATTR(type, S_IRUGO, show_dock_type, NULL); 9348652b00fd6416773f113dab3dfa0d4509def825bShaohua Li 935c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown/** 936c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * dock_add - add a new dock station 937c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * @handle: the dock station handle 938c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * 939c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * allocated and initialize a new dock station device. Find all devices 940c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * that are on the dock station, and register for dock event notifications. 941c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown */ 942c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brownstatic int dock_add(acpi_handle handle) 943c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown{ 944c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown int ret; 945c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown struct dock_dependent_device *dd; 946db350b084dc2cf816288643861ce07b0562dd723Shaohua Li struct dock_station *dock_station; 947db350b084dc2cf816288643861ce07b0562dd723Shaohua Li struct platform_device *dock_device; 948c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 949c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown /* allocate & initialize the dock_station private data */ 950c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown dock_station = kzalloc(sizeof(*dock_station), GFP_KERNEL); 951c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown if (!dock_station) 952c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown return -ENOMEM; 953c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown dock_station->handle = handle; 954c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown dock_station->last_dock_time = jiffies - HZ; 955c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown INIT_LIST_HEAD(&dock_station->dependent_devices); 956c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown INIT_LIST_HEAD(&dock_station->hotplug_devices); 957db350b084dc2cf816288643861ce07b0562dd723Shaohua Li INIT_LIST_HEAD(&dock_station->sibiling); 958c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown spin_lock_init(&dock_station->dd_lock); 9598b0dc866dd9b8d10a53cb3537385a51b7ee54b62Kristen Carlson Accardi mutex_init(&dock_station->hp_lock); 96007a18684c92c0156f87ea158b5adc3022485f82aKristen Accardi ATOMIC_INIT_NOTIFIER_HEAD(&dock_notifier_list); 961c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 962671adbec210efc15cef81b4616adae8bcd667296Kristen Carlson Accardi /* initialize platform device stuff */ 963db350b084dc2cf816288643861ce07b0562dd723Shaohua Li dock_station->dock_device = 964db350b084dc2cf816288643861ce07b0562dd723Shaohua Li platform_device_register_simple(dock_device_name, 965db350b084dc2cf816288643861ce07b0562dd723Shaohua Li dock_station_count, NULL, 0); 966db350b084dc2cf816288643861ce07b0562dd723Shaohua Li dock_device = dock_station->dock_device; 9670f6f2804563eee64f0fc7cbcb009b98b6f332af6Kristen Carlson Accardi if (IS_ERR(dock_device)) { 968671adbec210efc15cef81b4616adae8bcd667296Kristen Carlson Accardi kfree(dock_station); 96922fe4c2114e29477ca6738729c074ee8f60d3b73Chuck Ebbert dock_station = NULL; 9700f6f2804563eee64f0fc7cbcb009b98b6f332af6Kristen Carlson Accardi return PTR_ERR(dock_device); 971671adbec210efc15cef81b4616adae8bcd667296Kristen Carlson Accardi } 972db350b084dc2cf816288643861ce07b0562dd723Shaohua Li platform_device_add_data(dock_device, &dock_station, 973db350b084dc2cf816288643861ce07b0562dd723Shaohua Li sizeof(struct dock_station *)); 974a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardi 9759ef2a9a9f08722998540ed2ff38bccd0c54344c8Kristen Carlson Accardi /* we want the dock device to send uevents */ 9769ef2a9a9f08722998540ed2ff38bccd0c54344c8Kristen Carlson Accardi dock_device->dev.uevent_suppress = 0; 9779ef2a9a9f08722998540ed2ff38bccd0c54344c8Kristen Carlson Accardi 978db350b084dc2cf816288643861ce07b0562dd723Shaohua Li if (is_dock(handle)) 979db350b084dc2cf816288643861ce07b0562dd723Shaohua Li dock_station->flags |= DOCK_IS_DOCK; 980db350b084dc2cf816288643861ce07b0562dd723Shaohua Li if (is_ata(handle)) 981db350b084dc2cf816288643861ce07b0562dd723Shaohua Li dock_station->flags |= DOCK_IS_ATA; 982db350b084dc2cf816288643861ce07b0562dd723Shaohua Li if (is_battery(handle)) 983db350b084dc2cf816288643861ce07b0562dd723Shaohua Li dock_station->flags |= DOCK_IS_BAT; 984db350b084dc2cf816288643861ce07b0562dd723Shaohua Li 9850f6f2804563eee64f0fc7cbcb009b98b6f332af6Kristen Carlson Accardi ret = device_create_file(&dock_device->dev, &dev_attr_docked); 986c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org if (ret) { 987c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org printk("Error %d adding sysfs file\n", ret); 9880f6f2804563eee64f0fc7cbcb009b98b6f332af6Kristen Carlson Accardi platform_device_unregister(dock_device); 989c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org kfree(dock_station); 99022fe4c2114e29477ca6738729c074ee8f60d3b73Chuck Ebbert dock_station = NULL; 991c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org return ret; 992c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org } 9930f6f2804563eee64f0fc7cbcb009b98b6f332af6Kristen Carlson Accardi ret = device_create_file(&dock_device->dev, &dev_attr_undock); 994c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org if (ret) { 995c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org printk("Error %d adding sysfs file\n", ret); 9960f6f2804563eee64f0fc7cbcb009b98b6f332af6Kristen Carlson Accardi device_remove_file(&dock_device->dev, &dev_attr_docked); 9970f6f2804563eee64f0fc7cbcb009b98b6f332af6Kristen Carlson Accardi platform_device_unregister(dock_device); 998c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org kfree(dock_station); 99922fe4c2114e29477ca6738729c074ee8f60d3b73Chuck Ebbert dock_station = NULL; 1000c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org return ret; 1001c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org } 10020f6f2804563eee64f0fc7cbcb009b98b6f332af6Kristen Carlson Accardi ret = device_create_file(&dock_device->dev, &dev_attr_uid); 1003ac122bb64b0d51f0512185d3522a75f3f3a80bc9Ilya A. Volynets-Evenbakh if (ret) { 1004ac122bb64b0d51f0512185d3522a75f3f3a80bc9Ilya A. Volynets-Evenbakh printk("Error %d adding sysfs file\n", ret); 10050f6f2804563eee64f0fc7cbcb009b98b6f332af6Kristen Carlson Accardi device_remove_file(&dock_device->dev, &dev_attr_docked); 10060f6f2804563eee64f0fc7cbcb009b98b6f332af6Kristen Carlson Accardi device_remove_file(&dock_device->dev, &dev_attr_undock); 10070f6f2804563eee64f0fc7cbcb009b98b6f332af6Kristen Carlson Accardi platform_device_unregister(dock_device); 1008ac122bb64b0d51f0512185d3522a75f3f3a80bc9Ilya A. Volynets-Evenbakh kfree(dock_station); 100922fe4c2114e29477ca6738729c074ee8f60d3b73Chuck Ebbert dock_station = NULL; 1010ac122bb64b0d51f0512185d3522a75f3f3a80bc9Ilya A. Volynets-Evenbakh return ret; 1011ac122bb64b0d51f0512185d3522a75f3f3a80bc9Ilya A. Volynets-Evenbakh } 1012a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardi ret = device_create_file(&dock_device->dev, &dev_attr_flags); 1013a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardi if (ret) { 1014a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardi printk("Error %d adding sysfs file\n", ret); 1015a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardi device_remove_file(&dock_device->dev, &dev_attr_docked); 1016a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardi device_remove_file(&dock_device->dev, &dev_attr_undock); 1017a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardi device_remove_file(&dock_device->dev, &dev_attr_uid); 1018a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardi platform_device_unregister(dock_device); 1019a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardi kfree(dock_station); 1020a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardi dock_station = NULL; 1021a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardi return ret; 1022a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardi } 10238652b00fd6416773f113dab3dfa0d4509def825bShaohua Li ret = device_create_file(&dock_device->dev, &dev_attr_type); 10248652b00fd6416773f113dab3dfa0d4509def825bShaohua Li if (ret) 10258652b00fd6416773f113dab3dfa0d4509def825bShaohua Li printk(KERN_ERR"Error %d adding sysfs file\n", ret); 1026671adbec210efc15cef81b4616adae8bcd667296Kristen Carlson Accardi 1027c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown /* Find dependent devices */ 1028c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, 1029c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown ACPI_UINT32_MAX, find_dock_devices, dock_station, 1030c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown NULL); 1031c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 1032c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown /* add the dock station as a device dependent on itself */ 1033c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown dd = alloc_dock_dependent_device(handle); 1034c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown if (!dd) { 1035c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown kfree(dock_station); 103622fe4c2114e29477ca6738729c074ee8f60d3b73Chuck Ebbert dock_station = NULL; 1037671adbec210efc15cef81b4616adae8bcd667296Kristen Carlson Accardi ret = -ENOMEM; 1038671adbec210efc15cef81b4616adae8bcd667296Kristen Carlson Accardi goto dock_add_err_unregister; 1039c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown } 1040c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown add_dock_dependent_device(dock_station, dd); 1041c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 1042db350b084dc2cf816288643861ce07b0562dd723Shaohua Li dock_station_count++; 1043db350b084dc2cf816288643861ce07b0562dd723Shaohua Li list_add(&dock_station->sibiling, &dock_stations); 1044c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown return 0; 1045c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 1046671adbec210efc15cef81b4616adae8bcd667296Kristen Carlson Accardidock_add_err_unregister: 10478652b00fd6416773f113dab3dfa0d4509def825bShaohua Li device_remove_file(&dock_device->dev, &dev_attr_type); 10480f6f2804563eee64f0fc7cbcb009b98b6f332af6Kristen Carlson Accardi device_remove_file(&dock_device->dev, &dev_attr_docked); 10490f6f2804563eee64f0fc7cbcb009b98b6f332af6Kristen Carlson Accardi device_remove_file(&dock_device->dev, &dev_attr_undock); 10500f6f2804563eee64f0fc7cbcb009b98b6f332af6Kristen Carlson Accardi device_remove_file(&dock_device->dev, &dev_attr_uid); 1051a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardi device_remove_file(&dock_device->dev, &dev_attr_flags); 10520f6f2804563eee64f0fc7cbcb009b98b6f332af6Kristen Carlson Accardi platform_device_unregister(dock_device); 1053671adbec210efc15cef81b4616adae8bcd667296Kristen Carlson Accardi kfree(dock_station); 105422fe4c2114e29477ca6738729c074ee8f60d3b73Chuck Ebbert dock_station = NULL; 1055c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown return ret; 1056c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown} 1057c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 1058c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown/** 1059c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * dock_remove - free up resources related to the dock station 1060c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown */ 1061db350b084dc2cf816288643861ce07b0562dd723Shaohua Listatic int dock_remove(struct dock_station *dock_station) 1062c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown{ 1063c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown struct dock_dependent_device *dd, *tmp; 1064db350b084dc2cf816288643861ce07b0562dd723Shaohua Li struct platform_device *dock_device = dock_station->dock_device; 1065c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 1066db350b084dc2cf816288643861ce07b0562dd723Shaohua Li if (!dock_station_count) 1067c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown return 0; 1068c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 1069c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown /* remove dependent devices */ 1070c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown list_for_each_entry_safe(dd, tmp, &dock_station->dependent_devices, 1071c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown list) 1072c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown kfree(dd); 1073c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 1074671adbec210efc15cef81b4616adae8bcd667296Kristen Carlson Accardi /* cleanup sysfs */ 10758652b00fd6416773f113dab3dfa0d4509def825bShaohua Li device_remove_file(&dock_device->dev, &dev_attr_type); 10760f6f2804563eee64f0fc7cbcb009b98b6f332af6Kristen Carlson Accardi device_remove_file(&dock_device->dev, &dev_attr_docked); 10770f6f2804563eee64f0fc7cbcb009b98b6f332af6Kristen Carlson Accardi device_remove_file(&dock_device->dev, &dev_attr_undock); 10780f6f2804563eee64f0fc7cbcb009b98b6f332af6Kristen Carlson Accardi device_remove_file(&dock_device->dev, &dev_attr_uid); 1079a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardi device_remove_file(&dock_device->dev, &dev_attr_flags); 10800f6f2804563eee64f0fc7cbcb009b98b6f332af6Kristen Carlson Accardi platform_device_unregister(dock_device); 1081671adbec210efc15cef81b4616adae8bcd667296Kristen Carlson Accardi 1082c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown /* free dock station memory */ 1083c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown kfree(dock_station); 108422fe4c2114e29477ca6738729c074ee8f60d3b73Chuck Ebbert dock_station = NULL; 1085c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown return 0; 1086c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown} 1087c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 1088c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown/** 1089c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * find_dock - look for a dock station 1090c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * @handle: acpi handle of a device 1091c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * @lvl: unused 1092c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * @context: counter of dock stations found 1093c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * @rv: unused 1094c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * 1095c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * This is called by acpi_walk_namespace to look for dock stations. 1096c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown */ 1097c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brownstatic acpi_status 1098c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brownfind_dock(acpi_handle handle, u32 lvl, void *context, void **rv) 1099c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown{ 1100c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown acpi_status status = AE_OK; 1101c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 1102c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown if (is_dock(handle)) { 1103c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown if (dock_add(handle) >= 0) { 1104c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown status = AE_CTRL_TERMINATE; 1105c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown } 1106c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown } 1107c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown return status; 1108c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown} 1109c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 1110db350b084dc2cf816288643861ce07b0562dd723Shaohua Listatic acpi_status 1111db350b084dc2cf816288643861ce07b0562dd723Shaohua Lifind_bay(acpi_handle handle, u32 lvl, void *context, void **rv) 1112c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown{ 111361b836958371c717d1e6d4fea1d2c512969ad20bShaohua Li /* If bay is a dock, it's already handled */ 111461b836958371c717d1e6d4fea1d2c512969ad20bShaohua Li if (is_ejectable_bay(handle) && !is_dock(handle)) 1115db350b084dc2cf816288643861ce07b0562dd723Shaohua Li dock_add(handle); 1116db350b084dc2cf816288643861ce07b0562dd723Shaohua Li return AE_OK; 1117db350b084dc2cf816288643861ce07b0562dd723Shaohua Li} 1118c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 1119db350b084dc2cf816288643861ce07b0562dd723Shaohua Listatic int __init dock_init(void) 1120db350b084dc2cf816288643861ce07b0562dd723Shaohua Li{ 1121816c2eda3ce8fa7eb62f22e01e2ec7a3f7d677c0Len Brown if (acpi_disabled) 1122816c2eda3ce8fa7eb62f22e01e2ec7a3f7d677c0Len Brown return 0; 1123816c2eda3ce8fa7eb62f22e01e2ec7a3f7d677c0Len Brown 1124c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown /* look for a dock station */ 1125c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, 1126db350b084dc2cf816288643861ce07b0562dd723Shaohua Li ACPI_UINT32_MAX, find_dock, NULL, NULL); 1127c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 1128db350b084dc2cf816288643861ce07b0562dd723Shaohua Li /* look for bay */ 1129db350b084dc2cf816288643861ce07b0562dd723Shaohua Li acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, 1130db350b084dc2cf816288643861ce07b0562dd723Shaohua Li ACPI_UINT32_MAX, find_bay, NULL, NULL); 1131db350b084dc2cf816288643861ce07b0562dd723Shaohua Li if (!dock_station_count) { 1132db350b084dc2cf816288643861ce07b0562dd723Shaohua Li printk(KERN_INFO PREFIX "No dock devices found.\n"); 1133db350b084dc2cf816288643861ce07b0562dd723Shaohua Li return 0; 1134db350b084dc2cf816288643861ce07b0562dd723Shaohua Li } 1135c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 11366bd00a61ab63d4ceb635ae0316353c11c900b8d8Shaohua Li register_acpi_bus_notifier(&dock_acpi_notifier); 1137db350b084dc2cf816288643861ce07b0562dd723Shaohua Li printk(KERN_INFO PREFIX "%s: %d docks/bays found\n", 1138db350b084dc2cf816288643861ce07b0562dd723Shaohua Li ACPI_DOCK_DRIVER_DESCRIPTION, dock_station_count); 1139c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown return 0; 1140c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown} 1141c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 1142c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brownstatic void __exit dock_exit(void) 1143c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown{ 1144db350b084dc2cf816288643861ce07b0562dd723Shaohua Li struct dock_station *dock_station; 1145db350b084dc2cf816288643861ce07b0562dd723Shaohua Li 11466bd00a61ab63d4ceb635ae0316353c11c900b8d8Shaohua Li unregister_acpi_bus_notifier(&dock_acpi_notifier); 1147db350b084dc2cf816288643861ce07b0562dd723Shaohua Li list_for_each_entry(dock_station, &dock_stations, sibiling) 1148db350b084dc2cf816288643861ce07b0562dd723Shaohua Li dock_remove(dock_station); 1149c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown} 1150c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 1151db350b084dc2cf816288643861ce07b0562dd723Shaohua Li/* 1152db350b084dc2cf816288643861ce07b0562dd723Shaohua Li * Must be called before drivers of devices in dock, otherwise we can't know 1153db350b084dc2cf816288643861ce07b0562dd723Shaohua Li * which devices are in a dock 1154db350b084dc2cf816288643861ce07b0562dd723Shaohua Li */ 1155db350b084dc2cf816288643861ce07b0562dd723Shaohua Lisubsys_initcall(dock_init); 1156c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brownmodule_exit(dock_exit); 1157