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> 275a0e3ad6af8660be21ca98a971cd00f331318c05Tejun Heo#include <linux/slab.h> 28c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown#include <linux/init.h> 29c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown#include <linux/types.h> 30c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown#include <linux/notifier.h> 31671adbec210efc15cef81b4616adae8bcd667296Kristen Carlson Accardi#include <linux/platform_device.h> 32914e26379decf1fd984b22e51fd2e4209b7a7f1bAl Viro#include <linux/jiffies.h> 3362a6d7fd9bc1d85f9aae734c46234e88fa839db0Randy Dunlap#include <linux/stddef.h> 34c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown#include <acpi/acpi_bus.h> 35c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown#include <acpi/acpi_drivers.h> 36c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 37a192a9580bcc41692be1f36b77c3b681827f566aLen Brown#define PREFIX "ACPI: " 38a192a9580bcc41692be1f36b77c3b681827f566aLen Brown 397cda93e008e1a477970adbf82dba81a5d4f0ae40Len Brown#define ACPI_DOCK_DRIVER_DESCRIPTION "ACPI Dock Station Driver" 40c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 41f52fd66d2ea794010c2d7536cf8e6abed0ac4947Len BrownACPI_MODULE_NAME("dock"); 42c8f7a62cdde461914c6457d5f4362538ed810bf4Len BrownMODULE_AUTHOR("Kristen Carlson Accardi"); 437cda93e008e1a477970adbf82dba81a5d4f0ae40Len BrownMODULE_DESCRIPTION(ACPI_DOCK_DRIVER_DESCRIPTION); 44c8f7a62cdde461914c6457d5f4362538ed810bf4Len BrownMODULE_LICENSE("GPL"); 45c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 4690ab5ee94171b3e28de6bb42ee30b527014e0be7Rusty Russellstatic bool immediate_undock = 1; 47a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardimodule_param(immediate_undock, bool, 0644); 48a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson AccardiMODULE_PARM_DESC(immediate_undock, "1 (default) will cause the driver to " 49a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardi "undock immediately when the undock button is pressed, 0 will cause" 50a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardi " the driver to wait for userspace to write the undock sysfs file " 51a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardi " before undocking"); 52a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardi 53c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brownstatic struct atomic_notifier_head dock_notifier_list; 54c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 55a340af14b4c08a53c5f7d821d8bd910e17403384Frank Seidelstatic const struct acpi_device_id dock_device_ids[] = { 56a340af14b4c08a53c5f7d821d8bd910e17403384Frank Seidel {"LNXDOCK", 0}, 57a340af14b4c08a53c5f7d821d8bd910e17403384Frank Seidel {"", 0}, 58a340af14b4c08a53c5f7d821d8bd910e17403384Frank Seidel}; 59a340af14b4c08a53c5f7d821d8bd910e17403384Frank SeidelMODULE_DEVICE_TABLE(acpi, dock_device_ids); 60a340af14b4c08a53c5f7d821d8bd910e17403384Frank Seidel 61c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brownstruct dock_station { 62c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown acpi_handle handle; 63c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown unsigned long last_dock_time; 64c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown u32 flags; 65c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown spinlock_t dd_lock; 668b0dc866dd9b8d10a53cb3537385a51b7ee54b62Kristen Carlson Accardi struct mutex hp_lock; 67c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown struct list_head dependent_devices; 68c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown struct list_head hotplug_devices; 69db350b084dc2cf816288643861ce07b0562dd723Shaohua Li 7050d716e477a456f6ef8ef05f06a34f3d96b66e80Alex Chiang struct list_head sibling; 71db350b084dc2cf816288643861ce07b0562dd723Shaohua Li struct platform_device *dock_device; 72c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown}; 73db350b084dc2cf816288643861ce07b0562dd723Shaohua Listatic LIST_HEAD(dock_stations); 74db350b084dc2cf816288643861ce07b0562dd723Shaohua Listatic int dock_station_count; 75c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 76c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brownstruct dock_dependent_device { 77c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown struct list_head list; 78c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown struct list_head hotplug_list; 79c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown acpi_handle handle; 809c8b04be443b33939f374a811c82abeebe0a61d1Vasiliy Kulikov const struct acpi_dock_ops *ops; 81c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown void *context; 82c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown}; 83c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 84c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown#define DOCK_DOCKING 0x00000001 85a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardi#define DOCK_UNDOCKING 0x00000002 86db350b084dc2cf816288643861ce07b0562dd723Shaohua Li#define DOCK_IS_DOCK 0x00000010 87db350b084dc2cf816288643861ce07b0562dd723Shaohua Li#define DOCK_IS_ATA 0x00000020 88db350b084dc2cf816288643861ce07b0562dd723Shaohua Li#define DOCK_IS_BAT 0x00000040 895669021e40964303994a20633548732c6bb26636Kristen Carlson Accardi#define DOCK_EVENT 3 905669021e40964303994a20633548732c6bb26636Kristen Carlson Accardi#define UNDOCK_EVENT 2 91c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 92c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown/***************************************************************************** 93c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * Dock Dependent device functions * 94c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown *****************************************************************************/ 95c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown/** 96f69cfdd24ac40ab7bbd00d6ad85e003da755e3a0Alex Chiang * add_dock_dependent_device - associate a device with the dock station 97f69cfdd24ac40ab7bbd00d6ad85e003da755e3a0Alex Chiang * @ds: The dock station 98f69cfdd24ac40ab7bbd00d6ad85e003da755e3a0Alex Chiang * @handle: handle of the dependent device 99c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * 100f69cfdd24ac40ab7bbd00d6ad85e003da755e3a0Alex Chiang * Add the dependent device to the dock's dependent device list. 101c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown */ 102f69cfdd24ac40ab7bbd00d6ad85e003da755e3a0Alex Chiangstatic int 103f69cfdd24ac40ab7bbd00d6ad85e003da755e3a0Alex Chiangadd_dock_dependent_device(struct dock_station *ds, acpi_handle handle) 104c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown{ 105c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown struct dock_dependent_device *dd; 106c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 107c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown dd = kzalloc(sizeof(*dd), GFP_KERNEL); 108f69cfdd24ac40ab7bbd00d6ad85e003da755e3a0Alex Chiang if (!dd) 109f69cfdd24ac40ab7bbd00d6ad85e003da755e3a0Alex Chiang return -ENOMEM; 110f69cfdd24ac40ab7bbd00d6ad85e003da755e3a0Alex Chiang 111f69cfdd24ac40ab7bbd00d6ad85e003da755e3a0Alex Chiang dd->handle = handle; 112f69cfdd24ac40ab7bbd00d6ad85e003da755e3a0Alex Chiang INIT_LIST_HEAD(&dd->list); 113f69cfdd24ac40ab7bbd00d6ad85e003da755e3a0Alex Chiang INIT_LIST_HEAD(&dd->hotplug_list); 114c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 115c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown spin_lock(&ds->dd_lock); 116c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown list_add_tail(&dd->list, &ds->dependent_devices); 117c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown spin_unlock(&ds->dd_lock); 118f69cfdd24ac40ab7bbd00d6ad85e003da755e3a0Alex Chiang 119f69cfdd24ac40ab7bbd00d6ad85e003da755e3a0Alex Chiang return 0; 120c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown} 121c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 122c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown/** 123c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * dock_add_hotplug_device - associate a hotplug handler with the dock station 124c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * @ds: The dock station 125c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * @dd: The dependent device struct 126c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * 127c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * Add the dependent device to the dock's hotplug device list 128c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown */ 129c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brownstatic void 130c8f7a62cdde461914c6457d5f4362538ed810bf4Len Browndock_add_hotplug_device(struct dock_station *ds, 131c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown struct dock_dependent_device *dd) 132c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown{ 1338b0dc866dd9b8d10a53cb3537385a51b7ee54b62Kristen Carlson Accardi mutex_lock(&ds->hp_lock); 134c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown list_add_tail(&dd->hotplug_list, &ds->hotplug_devices); 1358b0dc866dd9b8d10a53cb3537385a51b7ee54b62Kristen Carlson Accardi mutex_unlock(&ds->hp_lock); 136c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown} 137c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 138c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown/** 139c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * dock_del_hotplug_device - remove a hotplug handler from the dock station 140c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * @ds: The dock station 141c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * @dd: the dependent device struct 142c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * 143c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * Delete the dependent device from the dock's hotplug device list 144c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown */ 145c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brownstatic void 146c8f7a62cdde461914c6457d5f4362538ed810bf4Len Browndock_del_hotplug_device(struct dock_station *ds, 147c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown struct dock_dependent_device *dd) 148c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown{ 1498b0dc866dd9b8d10a53cb3537385a51b7ee54b62Kristen Carlson Accardi mutex_lock(&ds->hp_lock); 150c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown list_del(&dd->hotplug_list); 1518b0dc866dd9b8d10a53cb3537385a51b7ee54b62Kristen Carlson Accardi mutex_unlock(&ds->hp_lock); 152c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown} 153c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 154c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown/** 155c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * find_dock_dependent_device - get a device dependent on this dock 156c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * @ds: the dock station 157c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * @handle: the acpi_handle of the device we want 158c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * 159c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * iterate over the dependent device list for this dock. If the 160c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * dependent device matches the handle, return. 161c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown */ 162c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brownstatic struct dock_dependent_device * 163c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brownfind_dock_dependent_device(struct dock_station *ds, acpi_handle handle) 164c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown{ 165c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown struct dock_dependent_device *dd; 166c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 167c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown spin_lock(&ds->dd_lock); 168c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown list_for_each_entry(dd, &ds->dependent_devices, list) { 169c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown if (handle == dd->handle) { 170c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown spin_unlock(&ds->dd_lock); 171c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown return dd; 172c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown } 173c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown } 174c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown spin_unlock(&ds->dd_lock); 175c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown return NULL; 176c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown} 177c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 178c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown/***************************************************************************** 179c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * Dock functions * 180c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown *****************************************************************************/ 181c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown/** 182c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * is_dock - see if a device is a dock station 183c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * @handle: acpi handle of the device 184c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * 185c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * If an acpi object has a _DCK method, then it is by definition a dock 186c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * station, so return true. 187c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown */ 188c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brownstatic int is_dock(acpi_handle handle) 189c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown{ 190c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown acpi_status status; 191c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown acpi_handle tmp; 192c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 193c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown status = acpi_get_handle(handle, "_DCK", &tmp); 194c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown if (ACPI_FAILURE(status)) 195c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown return 0; 196c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown return 1; 197c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown} 198c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 199db350b084dc2cf816288643861ce07b0562dd723Shaohua Listatic int is_ejectable(acpi_handle handle) 200db350b084dc2cf816288643861ce07b0562dd723Shaohua Li{ 201db350b084dc2cf816288643861ce07b0562dd723Shaohua Li acpi_status status; 202db350b084dc2cf816288643861ce07b0562dd723Shaohua Li acpi_handle tmp; 203db350b084dc2cf816288643861ce07b0562dd723Shaohua Li 204db350b084dc2cf816288643861ce07b0562dd723Shaohua Li status = acpi_get_handle(handle, "_EJ0", &tmp); 205db350b084dc2cf816288643861ce07b0562dd723Shaohua Li if (ACPI_FAILURE(status)) 206db350b084dc2cf816288643861ce07b0562dd723Shaohua Li return 0; 207db350b084dc2cf816288643861ce07b0562dd723Shaohua Li return 1; 208db350b084dc2cf816288643861ce07b0562dd723Shaohua Li} 209db350b084dc2cf816288643861ce07b0562dd723Shaohua Li 210db350b084dc2cf816288643861ce07b0562dd723Shaohua Listatic int is_ata(acpi_handle handle) 211db350b084dc2cf816288643861ce07b0562dd723Shaohua Li{ 212db350b084dc2cf816288643861ce07b0562dd723Shaohua Li acpi_handle tmp; 213db350b084dc2cf816288643861ce07b0562dd723Shaohua Li 214db350b084dc2cf816288643861ce07b0562dd723Shaohua Li if ((ACPI_SUCCESS(acpi_get_handle(handle, "_GTF", &tmp))) || 215db350b084dc2cf816288643861ce07b0562dd723Shaohua Li (ACPI_SUCCESS(acpi_get_handle(handle, "_GTM", &tmp))) || 216db350b084dc2cf816288643861ce07b0562dd723Shaohua Li (ACPI_SUCCESS(acpi_get_handle(handle, "_STM", &tmp))) || 217db350b084dc2cf816288643861ce07b0562dd723Shaohua Li (ACPI_SUCCESS(acpi_get_handle(handle, "_SDD", &tmp)))) 218db350b084dc2cf816288643861ce07b0562dd723Shaohua Li return 1; 219db350b084dc2cf816288643861ce07b0562dd723Shaohua Li 220db350b084dc2cf816288643861ce07b0562dd723Shaohua Li return 0; 221db350b084dc2cf816288643861ce07b0562dd723Shaohua Li} 222db350b084dc2cf816288643861ce07b0562dd723Shaohua Li 223db350b084dc2cf816288643861ce07b0562dd723Shaohua Listatic int is_battery(acpi_handle handle) 224db350b084dc2cf816288643861ce07b0562dd723Shaohua Li{ 225db350b084dc2cf816288643861ce07b0562dd723Shaohua Li struct acpi_device_info *info; 226db350b084dc2cf816288643861ce07b0562dd723Shaohua Li int ret = 1; 227db350b084dc2cf816288643861ce07b0562dd723Shaohua Li 22815b8dd53f5ffaf8e2d9095c423f713423f576c0fBob Moore if (!ACPI_SUCCESS(acpi_get_object_info(handle, &info))) 229db350b084dc2cf816288643861ce07b0562dd723Shaohua Li return 0; 230db350b084dc2cf816288643861ce07b0562dd723Shaohua Li if (!(info->valid & ACPI_VALID_HID)) 231db350b084dc2cf816288643861ce07b0562dd723Shaohua Li ret = 0; 232db350b084dc2cf816288643861ce07b0562dd723Shaohua Li else 23315b8dd53f5ffaf8e2d9095c423f713423f576c0fBob Moore ret = !strcmp("PNP0C0A", info->hardware_id.string); 234db350b084dc2cf816288643861ce07b0562dd723Shaohua Li 23515b8dd53f5ffaf8e2d9095c423f713423f576c0fBob Moore kfree(info); 236db350b084dc2cf816288643861ce07b0562dd723Shaohua Li return ret; 237db350b084dc2cf816288643861ce07b0562dd723Shaohua Li} 238db350b084dc2cf816288643861ce07b0562dd723Shaohua Li 239db350b084dc2cf816288643861ce07b0562dd723Shaohua Listatic int is_ejectable_bay(acpi_handle handle) 240db350b084dc2cf816288643861ce07b0562dd723Shaohua Li{ 241db350b084dc2cf816288643861ce07b0562dd723Shaohua Li acpi_handle phandle; 242747479a3fb42849fe73b9b1f7545d751bde7d632Alex Chiang 243db350b084dc2cf816288643861ce07b0562dd723Shaohua Li if (!is_ejectable(handle)) 244db350b084dc2cf816288643861ce07b0562dd723Shaohua Li return 0; 245db350b084dc2cf816288643861ce07b0562dd723Shaohua Li if (is_battery(handle) || is_ata(handle)) 246db350b084dc2cf816288643861ce07b0562dd723Shaohua Li return 1; 247db350b084dc2cf816288643861ce07b0562dd723Shaohua Li if (!acpi_get_parent(handle, &phandle) && is_ata(phandle)) 248db350b084dc2cf816288643861ce07b0562dd723Shaohua Li return 1; 249db350b084dc2cf816288643861ce07b0562dd723Shaohua Li return 0; 250db350b084dc2cf816288643861ce07b0562dd723Shaohua Li} 251db350b084dc2cf816288643861ce07b0562dd723Shaohua Li 252c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown/** 253c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * is_dock_device - see if a device is on a dock station 254c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * @handle: acpi handle of the device 255c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * 256c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * If this device is either the dock station itself, 257c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * or is a device dependent on the dock station, then it 258c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * is a dock device 259c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown */ 260c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brownint is_dock_device(acpi_handle handle) 261c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown{ 262db350b084dc2cf816288643861ce07b0562dd723Shaohua Li struct dock_station *dock_station; 263db350b084dc2cf816288643861ce07b0562dd723Shaohua Li 264db350b084dc2cf816288643861ce07b0562dd723Shaohua Li if (!dock_station_count) 265c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown return 0; 266c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 267db350b084dc2cf816288643861ce07b0562dd723Shaohua Li if (is_dock(handle)) 268c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown return 1; 269747479a3fb42849fe73b9b1f7545d751bde7d632Alex Chiang 270747479a3fb42849fe73b9b1f7545d751bde7d632Alex Chiang list_for_each_entry(dock_station, &dock_stations, sibling) 271db350b084dc2cf816288643861ce07b0562dd723Shaohua Li if (find_dock_dependent_device(dock_station, handle)) 272db350b084dc2cf816288643861ce07b0562dd723Shaohua Li return 1; 273c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 274c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown return 0; 275c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown} 276c8f7a62cdde461914c6457d5f4362538ed810bf4Len BrownEXPORT_SYMBOL_GPL(is_dock_device); 277c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 278c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown/** 279c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * dock_present - see if the dock station is present. 280c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * @ds: the dock station 281c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * 282c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * execute the _STA method. note that present does not 283c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * imply that we are docked. 284c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown */ 285c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brownstatic int dock_present(struct dock_station *ds) 286c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown{ 28727663c5855b10af9ec67bc7dfba001426ba21222Matthew Wilcox unsigned long long sta; 288c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown acpi_status status; 289c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 290c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown if (ds) { 291c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown status = acpi_evaluate_integer(ds->handle, "_STA", NULL, &sta); 292c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown if (ACPI_SUCCESS(status) && sta) 293c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown return 1; 294c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown } 295c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown return 0; 296c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown} 297c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 298c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown/** 299c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * dock_create_acpi_device - add new devices to acpi 300c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * @handle - handle of the device to add 301c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * 302c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * This function will create a new acpi_device for the given 303c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * handle if one does not exist already. This should cause 304c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * acpi to scan for drivers for the given devices, and call 305c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * matching driver's add routine. 306c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * 307c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * Returns a pointer to the acpi_device corresponding to the handle. 308c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown */ 309c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brownstatic struct acpi_device * dock_create_acpi_device(acpi_handle handle) 310c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown{ 311747479a3fb42849fe73b9b1f7545d751bde7d632Alex Chiang struct acpi_device *device; 312c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown struct acpi_device *parent_device; 313c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown acpi_handle parent; 314c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown int ret; 315c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 316c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown if (acpi_bus_get_device(handle, &device)) { 317c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown /* 318c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * no device created for this object, 319c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * so we should create one. 320c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown */ 321c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown acpi_get_parent(handle, &parent); 322c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown if (acpi_bus_get_device(parent, &parent_device)) 323c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown parent_device = NULL; 324c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 325c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown ret = acpi_bus_add(&device, parent_device, handle, 326c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown ACPI_BUS_TYPE_DEVICE); 327c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown if (ret) { 328747479a3fb42849fe73b9b1f7545d751bde7d632Alex Chiang pr_debug("error adding bus, %x\n", -ret); 329c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown return NULL; 330c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown } 331c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown } 332c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown return device; 333c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown} 334c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 335c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown/** 336c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * dock_remove_acpi_device - remove the acpi_device struct from acpi 337c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * @handle - the handle of the device to remove 338c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * 339c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * Tell acpi to remove the acpi_device. This should cause any loaded 340c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * driver to have it's remove routine called. 341c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown */ 342c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brownstatic void dock_remove_acpi_device(acpi_handle handle) 343c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown{ 344c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown struct acpi_device *device; 345c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown int ret; 346c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 347c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown if (!acpi_bus_get_device(handle, &device)) { 348c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown ret = acpi_bus_trim(device, 1); 349c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown if (ret) 350c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown pr_debug("error removing bus, %x\n", -ret); 351c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown } 352c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown} 353c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 354c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown/** 355c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * hotplug_dock_devices - insert or remove devices on the dock station 356c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * @ds: the dock station 357c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * @event: either bus check or eject request 358c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * 359c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * Some devices on the dock station need to have drivers called 360c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * to perform hotplug operations after a dock event has occurred. 361c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * Traverse the list of dock devices that have registered a 362c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * hotplug handler, and call the handler. 363c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown */ 364c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brownstatic void hotplug_dock_devices(struct dock_station *ds, u32 event) 365c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown{ 366c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown struct dock_dependent_device *dd; 367c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 3688b0dc866dd9b8d10a53cb3537385a51b7ee54b62Kristen Carlson Accardi mutex_lock(&ds->hp_lock); 369c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 370c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown /* 371c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * First call driver specific hotplug functions 372c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown */ 373747479a3fb42849fe73b9b1f7545d751bde7d632Alex Chiang list_for_each_entry(dd, &ds->hotplug_devices, hotplug_list) 3741253f7aabfebc51446dbec5c8895c5c8846dfe06Shaohua Li if (dd->ops && dd->ops->handler) 3751253f7aabfebc51446dbec5c8895c5c8846dfe06Shaohua Li dd->ops->handler(dd->handle, event, dd->context); 376c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 377c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown /* 378c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * Now make sure that an acpi_device is created for each 379c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * dependent device, or removed if this is an eject request. 380c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * This will cause acpi_drivers to be stopped/started if they 381c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * exist 382c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown */ 383c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown list_for_each_entry(dd, &ds->dependent_devices, list) { 384c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown if (event == ACPI_NOTIFY_EJECT_REQUEST) 385c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown dock_remove_acpi_device(dd->handle); 386c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown else 387c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown dock_create_acpi_device(dd->handle); 388c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown } 3898b0dc866dd9b8d10a53cb3537385a51b7ee54b62Kristen Carlson Accardi mutex_unlock(&ds->hp_lock); 390c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown} 391c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 392c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brownstatic void dock_event(struct dock_station *ds, u32 event, int num) 393c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown{ 394db350b084dc2cf816288643861ce07b0562dd723Shaohua Li struct device *dev = &ds->dock_device->dev; 39566b568218ab73be161dc109b913e6fa7dda44e16Holger Macht char event_string[13]; 39679a8f70b4b9127eacfc91dd1436c4a7be05e62abKristen Carlson Accardi char *envp[] = { event_string, NULL }; 3971253f7aabfebc51446dbec5c8895c5c8846dfe06Shaohua Li struct dock_dependent_device *dd; 39879a8f70b4b9127eacfc91dd1436c4a7be05e62abKristen Carlson Accardi 39979a8f70b4b9127eacfc91dd1436c4a7be05e62abKristen Carlson Accardi if (num == UNDOCK_EVENT) 40066b568218ab73be161dc109b913e6fa7dda44e16Holger Macht sprintf(event_string, "EVENT=undock"); 40179a8f70b4b9127eacfc91dd1436c4a7be05e62abKristen Carlson Accardi else 40266b568218ab73be161dc109b913e6fa7dda44e16Holger Macht sprintf(event_string, "EVENT=dock"); 40379a8f70b4b9127eacfc91dd1436c4a7be05e62abKristen Carlson Accardi 4045669021e40964303994a20633548732c6bb26636Kristen Carlson Accardi /* 4058ea86e0ba7c9d16ae0f35cb0c4165194fa573f7aKristen Carlson Accardi * Indicate that the status of the dock station has 4068ea86e0ba7c9d16ae0f35cb0c4165194fa573f7aKristen Carlson Accardi * changed. 4075669021e40964303994a20633548732c6bb26636Kristen Carlson Accardi */ 4081253f7aabfebc51446dbec5c8895c5c8846dfe06Shaohua Li if (num == DOCK_EVENT) 4091253f7aabfebc51446dbec5c8895c5c8846dfe06Shaohua Li kobject_uevent_env(&dev->kobj, KOBJ_CHANGE, envp); 4101253f7aabfebc51446dbec5c8895c5c8846dfe06Shaohua Li 4111253f7aabfebc51446dbec5c8895c5c8846dfe06Shaohua Li list_for_each_entry(dd, &ds->hotplug_devices, hotplug_list) 4121253f7aabfebc51446dbec5c8895c5c8846dfe06Shaohua Li if (dd->ops && dd->ops->uevent) 4131253f7aabfebc51446dbec5c8895c5c8846dfe06Shaohua Li dd->ops->uevent(dd->handle, event, dd->context); 414747479a3fb42849fe73b9b1f7545d751bde7d632Alex Chiang 4151253f7aabfebc51446dbec5c8895c5c8846dfe06Shaohua Li if (num != DOCK_EVENT) 4161253f7aabfebc51446dbec5c8895c5c8846dfe06Shaohua Li kobject_uevent_env(&dev->kobj, KOBJ_CHANGE, envp); 417c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown} 418c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 419c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown/** 420c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * eject_dock - respond to a dock eject request 421c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * @ds: the dock station 422c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * 423c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * This is called after _DCK is called, to execute the dock station's 424c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * _EJ0 method. 425c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown */ 426c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brownstatic void eject_dock(struct dock_station *ds) 427c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown{ 428c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown struct acpi_object_list arg_list; 429c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown union acpi_object arg; 430c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown acpi_status status; 431c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown acpi_handle tmp; 432c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 433c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown /* all dock devices should have _EJ0, but check anyway */ 434c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown status = acpi_get_handle(ds->handle, "_EJ0", &tmp); 435c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown if (ACPI_FAILURE(status)) { 436c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown pr_debug("No _EJ0 support for dock device\n"); 437c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown return; 438c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown } 439c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 440c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown arg_list.count = 1; 441c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown arg_list.pointer = &arg; 442c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown arg.type = ACPI_TYPE_INTEGER; 443c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown arg.integer.value = 1; 444c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 445747479a3fb42849fe73b9b1f7545d751bde7d632Alex Chiang status = acpi_evaluate_object(ds->handle, "_EJ0", &arg_list, NULL); 446747479a3fb42849fe73b9b1f7545d751bde7d632Alex Chiang if (ACPI_FAILURE(status)) 447c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown pr_debug("Failed to evaluate _EJ0!\n"); 448c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown} 449c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 450c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown/** 451c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * handle_dock - handle a dock event 452c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * @ds: the dock station 453c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * @dock: to dock, or undock - that is the question 454c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * 455c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * Execute the _DCK method in response to an acpi event 456c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown */ 457c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brownstatic void handle_dock(struct dock_station *ds, int dock) 458c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown{ 459c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown acpi_status status; 460c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown struct acpi_object_list arg_list; 461c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown union acpi_object arg; 462c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 463c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown struct acpi_buffer name_buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 464c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 465c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown acpi_get_name(ds->handle, ACPI_FULL_PATHNAME, &name_buffer); 466c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 4679254bc845db90a123cf992e983539d0ee409f22aDmitry Torokhov printk(KERN_INFO PREFIX "%s - %s\n", 4689254bc845db90a123cf992e983539d0ee409f22aDmitry Torokhov (char *)name_buffer.pointer, dock ? "docking" : "undocking"); 469c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 470c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown /* _DCK method has one argument */ 471c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown arg_list.count = 1; 472c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown arg_list.pointer = &arg; 473c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown arg.type = ACPI_TYPE_INTEGER; 474c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown arg.integer.value = dock; 475c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown status = acpi_evaluate_object(ds->handle, "_DCK", &arg_list, &buffer); 476db350b084dc2cf816288643861ce07b0562dd723Shaohua Li if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) 4770a918a9432cc30aede10f904253b66ea6ab485acThomas Renninger ACPI_EXCEPTION((AE_INFO, status, "%s - failed to execute" 4780a918a9432cc30aede10f904253b66ea6ab485acThomas Renninger " _DCK\n", (char *)name_buffer.pointer)); 4790a918a9432cc30aede10f904253b66ea6ab485acThomas Renninger 480c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown kfree(buffer.pointer); 481c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown kfree(name_buffer.pointer); 482c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown} 483c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 484c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brownstatic inline void dock(struct dock_station *ds) 485c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown{ 486c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown handle_dock(ds, 1); 487c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown} 488c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 489c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brownstatic inline void undock(struct dock_station *ds) 490c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown{ 491c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown handle_dock(ds, 0); 492c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown} 493c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 494c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brownstatic inline void begin_dock(struct dock_station *ds) 495c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown{ 496c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown ds->flags |= DOCK_DOCKING; 497c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown} 498c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 499c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brownstatic inline void complete_dock(struct dock_station *ds) 500c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown{ 501c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown ds->flags &= ~(DOCK_DOCKING); 502c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown ds->last_dock_time = jiffies; 503c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown} 504c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 505a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardistatic inline void begin_undock(struct dock_station *ds) 506a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardi{ 507a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardi ds->flags |= DOCK_UNDOCKING; 508a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardi} 509a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardi 510a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardistatic inline void complete_undock(struct dock_station *ds) 511a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardi{ 512a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardi ds->flags &= ~(DOCK_UNDOCKING); 513a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardi} 514a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardi 515406f692d0803d73acd3984c1e11719d3a913fd5eShaohua Listatic void dock_lock(struct dock_station *ds, int lock) 516406f692d0803d73acd3984c1e11719d3a913fd5eShaohua Li{ 517406f692d0803d73acd3984c1e11719d3a913fd5eShaohua Li struct acpi_object_list arg_list; 518406f692d0803d73acd3984c1e11719d3a913fd5eShaohua Li union acpi_object arg; 519406f692d0803d73acd3984c1e11719d3a913fd5eShaohua Li acpi_status status; 520406f692d0803d73acd3984c1e11719d3a913fd5eShaohua Li 521406f692d0803d73acd3984c1e11719d3a913fd5eShaohua Li arg_list.count = 1; 522406f692d0803d73acd3984c1e11719d3a913fd5eShaohua Li arg_list.pointer = &arg; 523406f692d0803d73acd3984c1e11719d3a913fd5eShaohua Li arg.type = ACPI_TYPE_INTEGER; 524406f692d0803d73acd3984c1e11719d3a913fd5eShaohua Li arg.integer.value = !!lock; 525406f692d0803d73acd3984c1e11719d3a913fd5eShaohua Li status = acpi_evaluate_object(ds->handle, "_LCK", &arg_list, NULL); 526406f692d0803d73acd3984c1e11719d3a913fd5eShaohua Li if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { 527406f692d0803d73acd3984c1e11719d3a913fd5eShaohua Li if (lock) 528406f692d0803d73acd3984c1e11719d3a913fd5eShaohua Li printk(KERN_WARNING PREFIX "Locking device failed\n"); 529406f692d0803d73acd3984c1e11719d3a913fd5eShaohua Li else 530406f692d0803d73acd3984c1e11719d3a913fd5eShaohua Li printk(KERN_WARNING PREFIX "Unlocking device failed\n"); 531406f692d0803d73acd3984c1e11719d3a913fd5eShaohua Li } 532406f692d0803d73acd3984c1e11719d3a913fd5eShaohua Li} 533406f692d0803d73acd3984c1e11719d3a913fd5eShaohua Li 534c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown/** 535c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * dock_in_progress - see if we are in the middle of handling a dock event 536c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * @ds: the dock station 537c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * 538c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * Sometimes while docking, false dock events can be sent to the driver 539c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * because good connections aren't made or some other reason. Ignore these 540c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * if we are in the middle of doing something. 541c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown */ 542c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brownstatic int dock_in_progress(struct dock_station *ds) 543c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown{ 544c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown if ((ds->flags & DOCK_DOCKING) || 545c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown time_before(jiffies, (ds->last_dock_time + HZ))) 546c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown return 1; 547c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown return 0; 548c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown} 549c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 550c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown/** 551c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * register_dock_notifier - add yourself to the dock notifier list 552c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * @nb: the callers notifier block 553c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * 554c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * If a driver wishes to be notified about dock events, they can 555c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * use this function to put a notifier block on the dock notifier list. 556c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * this notifier call chain will be called after a dock event, but 557c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * before hotplugging any new devices. 558c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown */ 559c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brownint register_dock_notifier(struct notifier_block *nb) 560c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown{ 561db350b084dc2cf816288643861ce07b0562dd723Shaohua Li if (!dock_station_count) 5622548c06b72396e28abdb5dd572ab589c3c22f4b9Prarit Bhargava return -ENODEV; 5632548c06b72396e28abdb5dd572ab589c3c22f4b9Prarit Bhargava 564c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown return atomic_notifier_chain_register(&dock_notifier_list, nb); 565c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown} 566c8f7a62cdde461914c6457d5f4362538ed810bf4Len BrownEXPORT_SYMBOL_GPL(register_dock_notifier); 567c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 568c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown/** 569c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * unregister_dock_notifier - remove yourself from the dock notifier list 570c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * @nb: the callers notifier block 571c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown */ 572c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brownvoid unregister_dock_notifier(struct notifier_block *nb) 573c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown{ 574db350b084dc2cf816288643861ce07b0562dd723Shaohua Li if (!dock_station_count) 5752548c06b72396e28abdb5dd572ab589c3c22f4b9Prarit Bhargava return; 5762548c06b72396e28abdb5dd572ab589c3c22f4b9Prarit Bhargava 577c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown atomic_notifier_chain_unregister(&dock_notifier_list, nb); 578c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown} 579c8f7a62cdde461914c6457d5f4362538ed810bf4Len BrownEXPORT_SYMBOL_GPL(unregister_dock_notifier); 580c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 581c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown/** 582c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * register_hotplug_dock_device - register a hotplug function 583c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * @handle: the handle of the device 5841253f7aabfebc51446dbec5c8895c5c8846dfe06Shaohua Li * @ops: handlers to call after docking 585c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * @context: device specific data 586c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * 587c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * If a driver would like to perform a hotplug operation after a dock 588c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * event, they can register an acpi_notifiy_handler to be called by 589c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * the dock driver after _DCK is executed. 590c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown */ 591c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brownint 5929c8b04be443b33939f374a811c82abeebe0a61d1Vasiliy Kulikovregister_hotplug_dock_device(acpi_handle handle, const struct acpi_dock_ops *ops, 593c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown void *context) 594c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown{ 595c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown struct dock_dependent_device *dd; 596db350b084dc2cf816288643861ce07b0562dd723Shaohua Li struct dock_station *dock_station; 59761b836958371c717d1e6d4fea1d2c512969ad20bShaohua Li int ret = -EINVAL; 598c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 599db350b084dc2cf816288643861ce07b0562dd723Shaohua Li if (!dock_station_count) 600c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown return -ENODEV; 601c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 602c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown /* 603c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * make sure this handle is for a device dependent on the dock, 604c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * this would include the dock station itself 605c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown */ 60650d716e477a456f6ef8ef05f06a34f3d96b66e80Alex Chiang list_for_each_entry(dock_station, &dock_stations, sibling) { 60761b836958371c717d1e6d4fea1d2c512969ad20bShaohua Li /* 60861b836958371c717d1e6d4fea1d2c512969ad20bShaohua Li * An ATA bay can be in a dock and itself can be ejected 6093ad2f3fbb961429d2aa627465ae4829758bc7e07Daniel Mack * separately, so there are two 'dock stations' which need the 61061b836958371c717d1e6d4fea1d2c512969ad20bShaohua Li * ops 61161b836958371c717d1e6d4fea1d2c512969ad20bShaohua Li */ 612db350b084dc2cf816288643861ce07b0562dd723Shaohua Li dd = find_dock_dependent_device(dock_station, handle); 613db350b084dc2cf816288643861ce07b0562dd723Shaohua Li if (dd) { 6141253f7aabfebc51446dbec5c8895c5c8846dfe06Shaohua Li dd->ops = ops; 615db350b084dc2cf816288643861ce07b0562dd723Shaohua Li dd->context = context; 616db350b084dc2cf816288643861ce07b0562dd723Shaohua Li dock_add_hotplug_device(dock_station, dd); 61761b836958371c717d1e6d4fea1d2c512969ad20bShaohua Li ret = 0; 618db350b084dc2cf816288643861ce07b0562dd723Shaohua Li } 619c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown } 620c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 62161b836958371c717d1e6d4fea1d2c512969ad20bShaohua Li return ret; 622c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown} 623c8f7a62cdde461914c6457d5f4362538ed810bf4Len BrownEXPORT_SYMBOL_GPL(register_hotplug_dock_device); 624c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 625c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown/** 626c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * unregister_hotplug_dock_device - remove yourself from the hotplug list 627c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * @handle: the acpi handle of the device 628c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown */ 629c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brownvoid unregister_hotplug_dock_device(acpi_handle handle) 630c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown{ 631c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown struct dock_dependent_device *dd; 632db350b084dc2cf816288643861ce07b0562dd723Shaohua Li struct dock_station *dock_station; 633c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 634db350b084dc2cf816288643861ce07b0562dd723Shaohua Li if (!dock_station_count) 635c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown return; 636c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 63750d716e477a456f6ef8ef05f06a34f3d96b66e80Alex Chiang list_for_each_entry(dock_station, &dock_stations, sibling) { 638db350b084dc2cf816288643861ce07b0562dd723Shaohua Li dd = find_dock_dependent_device(dock_station, handle); 639db350b084dc2cf816288643861ce07b0562dd723Shaohua Li if (dd) 640db350b084dc2cf816288643861ce07b0562dd723Shaohua Li dock_del_hotplug_device(dock_station, dd); 641db350b084dc2cf816288643861ce07b0562dd723Shaohua Li } 642c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown} 643c8f7a62cdde461914c6457d5f4362538ed810bf4Len BrownEXPORT_SYMBOL_GPL(unregister_hotplug_dock_device); 644c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 645c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown/** 646c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org * handle_eject_request - handle an undock request checking for error conditions 647c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org * 648c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org * Check to make sure the dock device is still present, then undock and 649c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org * hotremove all the devices that may need removing. 650c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org */ 651c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.orgstatic int handle_eject_request(struct dock_station *ds, u32 event) 652c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org{ 653c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org if (dock_in_progress(ds)) 654c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org return -EBUSY; 655c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org 656c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org /* 657c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org * here we need to generate the undock 658c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org * event prior to actually doing the undock 659c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org * so that the device struct still exists. 660afd7301ddb762b66bf1831b0820b402e5d2c439dHolger Macht * Also, even send the dock event if the 661afd7301ddb762b66bf1831b0820b402e5d2c439dHolger Macht * device is not present anymore 662c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org */ 663c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org dock_event(ds, event, UNDOCK_EVENT); 664afd7301ddb762b66bf1831b0820b402e5d2c439dHolger Macht 665c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org hotplug_dock_devices(ds, ACPI_NOTIFY_EJECT_REQUEST); 666c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org undock(ds); 667406f692d0803d73acd3984c1e11719d3a913fd5eShaohua Li dock_lock(ds, 0); 668c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org eject_dock(ds); 669c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org if (dock_present(ds)) { 670c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org printk(KERN_ERR PREFIX "Unable to undock!\n"); 671c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org return -EBUSY; 672c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org } 673a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardi complete_undock(ds); 674c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org return 0; 675c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org} 676c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org 677c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org/** 678c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * dock_notify - act upon an acpi dock notification 679c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * @handle: the dock station handle 680c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * @event: the acpi event 681c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * @data: our driver data struct 682c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * 683c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * If we are notified to dock, then check to see if the dock is 684c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * present and then dock. Notify all drivers of the dock event, 685c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org * and then hotplug and devices that may need hotplugging. 686c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown */ 687c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brownstatic void dock_notify(acpi_handle handle, u32 event, void *data) 688c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown{ 68950dd096973f1d95aa03c6a6d9e148d706b62b68eJan Engelhardt struct dock_station *ds = data; 6908b59560a3baf2e7c24e0fb92ea5d09eca92805dbShaohua Li struct acpi_device *tmp; 691db350b084dc2cf816288643861ce07b0562dd723Shaohua Li int surprise_removal = 0; 692c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 693db350b084dc2cf816288643861ce07b0562dd723Shaohua Li /* 694db350b084dc2cf816288643861ce07b0562dd723Shaohua Li * According to acpi spec 3.0a, if a DEVICE_CHECK notification 695db350b084dc2cf816288643861ce07b0562dd723Shaohua Li * is sent and _DCK is present, it is assumed to mean an undock 696db350b084dc2cf816288643861ce07b0562dd723Shaohua Li * request. 697db350b084dc2cf816288643861ce07b0562dd723Shaohua Li */ 698db350b084dc2cf816288643861ce07b0562dd723Shaohua Li if ((ds->flags & DOCK_IS_DOCK) && event == ACPI_NOTIFY_DEVICE_CHECK) 699db350b084dc2cf816288643861ce07b0562dd723Shaohua Li event = ACPI_NOTIFY_EJECT_REQUEST; 700db350b084dc2cf816288643861ce07b0562dd723Shaohua Li 701db350b084dc2cf816288643861ce07b0562dd723Shaohua Li /* 702db350b084dc2cf816288643861ce07b0562dd723Shaohua Li * dock station: BUS_CHECK - docked or surprise removal 703db350b084dc2cf816288643861ce07b0562dd723Shaohua Li * DEVICE_CHECK - undocked 704db350b084dc2cf816288643861ce07b0562dd723Shaohua Li * other device: BUS_CHECK/DEVICE_CHECK - added or surprise removal 705db350b084dc2cf816288643861ce07b0562dd723Shaohua Li * 706db350b084dc2cf816288643861ce07b0562dd723Shaohua Li * To simplify event handling, dock dependent device handler always 707db350b084dc2cf816288643861ce07b0562dd723Shaohua Li * get ACPI_NOTIFY_BUS_CHECK/ACPI_NOTIFY_DEVICE_CHECK for add and 708db350b084dc2cf816288643861ce07b0562dd723Shaohua Li * ACPI_NOTIFY_EJECT_REQUEST for removal 709db350b084dc2cf816288643861ce07b0562dd723Shaohua Li */ 710c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown switch (event) { 711c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown case ACPI_NOTIFY_BUS_CHECK: 712db350b084dc2cf816288643861ce07b0562dd723Shaohua Li case ACPI_NOTIFY_DEVICE_CHECK: 7138b59560a3baf2e7c24e0fb92ea5d09eca92805dbShaohua Li if (!dock_in_progress(ds) && acpi_bus_get_device(ds->handle, 7148b59560a3baf2e7c24e0fb92ea5d09eca92805dbShaohua Li &tmp)) { 715c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown begin_dock(ds); 716c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown dock(ds); 717c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown if (!dock_present(ds)) { 718c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown printk(KERN_ERR PREFIX "Unable to dock!\n"); 7198b59560a3baf2e7c24e0fb92ea5d09eca92805dbShaohua Li complete_dock(ds); 720c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown break; 721c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown } 722c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown atomic_notifier_call_chain(&dock_notifier_list, 723c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown event, NULL); 724c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown hotplug_dock_devices(ds, event); 725c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown complete_dock(ds); 726c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown dock_event(ds, event, DOCK_EVENT); 727406f692d0803d73acd3984c1e11719d3a913fd5eShaohua Li dock_lock(ds, 1); 7283a37898d507794cfc68a092303e02651d3f01308Lin Ming acpi_update_all_gpes(); 729db350b084dc2cf816288643861ce07b0562dd723Shaohua Li break; 730c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown } 731db350b084dc2cf816288643861ce07b0562dd723Shaohua Li if (dock_present(ds) || dock_in_progress(ds)) 732db350b084dc2cf816288643861ce07b0562dd723Shaohua Li break; 733db350b084dc2cf816288643861ce07b0562dd723Shaohua Li /* This is a surprise removal */ 734db350b084dc2cf816288643861ce07b0562dd723Shaohua Li surprise_removal = 1; 735db350b084dc2cf816288643861ce07b0562dd723Shaohua Li event = ACPI_NOTIFY_EJECT_REQUEST; 736db350b084dc2cf816288643861ce07b0562dd723Shaohua Li /* Fall back */ 737c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown case ACPI_NOTIFY_EJECT_REQUEST: 738a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardi begin_undock(ds); 739f730ae1838635a02aa60834762c61566911d004cShaohua Li if ((immediate_undock && !(ds->flags & DOCK_IS_ATA)) 740f730ae1838635a02aa60834762c61566911d004cShaohua Li || surprise_removal) 741a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardi handle_eject_request(ds, event); 742a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardi else 743a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardi dock_event(ds, event, UNDOCK_EVENT); 744c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown break; 745c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown default: 746c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown printk(KERN_ERR PREFIX "Unknown dock event %d\n", event); 747c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown } 748c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown} 749c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 75019cd847ab24fefe9e50101ec94479e0400a08650Zhang Ruistruct dock_data { 75119cd847ab24fefe9e50101ec94479e0400a08650Zhang Rui acpi_handle handle; 75219cd847ab24fefe9e50101ec94479e0400a08650Zhang Rui unsigned long event; 75319cd847ab24fefe9e50101ec94479e0400a08650Zhang Rui struct dock_station *ds; 75419cd847ab24fefe9e50101ec94479e0400a08650Zhang Rui}; 75519cd847ab24fefe9e50101ec94479e0400a08650Zhang Rui 75619cd847ab24fefe9e50101ec94479e0400a08650Zhang Ruistatic void acpi_dock_deferred_cb(void *context) 75719cd847ab24fefe9e50101ec94479e0400a08650Zhang Rui{ 758747479a3fb42849fe73b9b1f7545d751bde7d632Alex Chiang struct dock_data *data = context; 75919cd847ab24fefe9e50101ec94479e0400a08650Zhang Rui 76019cd847ab24fefe9e50101ec94479e0400a08650Zhang Rui dock_notify(data->handle, data->event, data->ds); 76119cd847ab24fefe9e50101ec94479e0400a08650Zhang Rui kfree(data); 76219cd847ab24fefe9e50101ec94479e0400a08650Zhang Rui} 76319cd847ab24fefe9e50101ec94479e0400a08650Zhang Rui 7646bd00a61ab63d4ceb635ae0316353c11c900b8d8Shaohua Listatic int acpi_dock_notifier_call(struct notifier_block *this, 7656bd00a61ab63d4ceb635ae0316353c11c900b8d8Shaohua Li unsigned long event, void *data) 7666bd00a61ab63d4ceb635ae0316353c11c900b8d8Shaohua Li{ 7676bd00a61ab63d4ceb635ae0316353c11c900b8d8Shaohua Li struct dock_station *dock_station; 768747479a3fb42849fe73b9b1f7545d751bde7d632Alex Chiang acpi_handle handle = data; 7696bd00a61ab63d4ceb635ae0316353c11c900b8d8Shaohua Li 7706bd00a61ab63d4ceb635ae0316353c11c900b8d8Shaohua Li if (event != ACPI_NOTIFY_BUS_CHECK && event != ACPI_NOTIFY_DEVICE_CHECK 7716bd00a61ab63d4ceb635ae0316353c11c900b8d8Shaohua Li && event != ACPI_NOTIFY_EJECT_REQUEST) 7726bd00a61ab63d4ceb635ae0316353c11c900b8d8Shaohua Li return 0; 77350d716e477a456f6ef8ef05f06a34f3d96b66e80Alex Chiang list_for_each_entry(dock_station, &dock_stations, sibling) { 7746bd00a61ab63d4ceb635ae0316353c11c900b8d8Shaohua Li if (dock_station->handle == handle) { 775747479a3fb42849fe73b9b1f7545d751bde7d632Alex Chiang struct dock_data *dd; 77619cd847ab24fefe9e50101ec94479e0400a08650Zhang Rui 777747479a3fb42849fe73b9b1f7545d751bde7d632Alex Chiang dd = kmalloc(sizeof(*dd), GFP_KERNEL); 778747479a3fb42849fe73b9b1f7545d751bde7d632Alex Chiang if (!dd) 77919cd847ab24fefe9e50101ec94479e0400a08650Zhang Rui return 0; 780747479a3fb42849fe73b9b1f7545d751bde7d632Alex Chiang dd->handle = handle; 781747479a3fb42849fe73b9b1f7545d751bde7d632Alex Chiang dd->event = event; 782747479a3fb42849fe73b9b1f7545d751bde7d632Alex Chiang dd->ds = dock_station; 783747479a3fb42849fe73b9b1f7545d751bde7d632Alex Chiang acpi_os_hotplug_execute(acpi_dock_deferred_cb, dd); 7846bd00a61ab63d4ceb635ae0316353c11c900b8d8Shaohua Li return 0 ; 7856bd00a61ab63d4ceb635ae0316353c11c900b8d8Shaohua Li } 7866bd00a61ab63d4ceb635ae0316353c11c900b8d8Shaohua Li } 7876bd00a61ab63d4ceb635ae0316353c11c900b8d8Shaohua Li return 0; 7886bd00a61ab63d4ceb635ae0316353c11c900b8d8Shaohua Li} 7896bd00a61ab63d4ceb635ae0316353c11c900b8d8Shaohua Li 7906bd00a61ab63d4ceb635ae0316353c11c900b8d8Shaohua Listatic struct notifier_block dock_acpi_notifier = { 7916bd00a61ab63d4ceb635ae0316353c11c900b8d8Shaohua Li .notifier_call = acpi_dock_notifier_call, 7926bd00a61ab63d4ceb635ae0316353c11c900b8d8Shaohua Li}; 7936bd00a61ab63d4ceb635ae0316353c11c900b8d8Shaohua Li 794c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown/** 795c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * find_dock_devices - find devices on the dock station 796c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * @handle: the handle of the device we are examining 797c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * @lvl: unused 798c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * @context: the dock station private data 799c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * @rv: unused 800c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * 801c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * This function is called by acpi_walk_namespace. It will 802c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * check to see if an object has an _EJD method. If it does, then it 803c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * will see if it is dependent on the dock station. 804c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown */ 805c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brownstatic acpi_status 806c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brownfind_dock_devices(acpi_handle handle, u32 lvl, void *context, void **rv) 807c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown{ 808c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown acpi_status status; 809fe9a2f77e5ad508b18671571c0b3f6f79ea709a8Kristen Carlson Accardi acpi_handle tmp, parent; 81050dd096973f1d95aa03c6a6d9e148d706b62b68eJan Engelhardt struct dock_station *ds = context; 811c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 812c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown status = acpi_bus_get_ejd(handle, &tmp); 813fe9a2f77e5ad508b18671571c0b3f6f79ea709a8Kristen Carlson Accardi if (ACPI_FAILURE(status)) { 814fe9a2f77e5ad508b18671571c0b3f6f79ea709a8Kristen Carlson Accardi /* try the parent device as well */ 815fe9a2f77e5ad508b18671571c0b3f6f79ea709a8Kristen Carlson Accardi status = acpi_get_parent(handle, &parent); 816fe9a2f77e5ad508b18671571c0b3f6f79ea709a8Kristen Carlson Accardi if (ACPI_FAILURE(status)) 817fe9a2f77e5ad508b18671571c0b3f6f79ea709a8Kristen Carlson Accardi goto fdd_out; 818fe9a2f77e5ad508b18671571c0b3f6f79ea709a8Kristen Carlson Accardi /* see if parent is dependent on dock */ 819fe9a2f77e5ad508b18671571c0b3f6f79ea709a8Kristen Carlson Accardi status = acpi_bus_get_ejd(parent, &tmp); 820fe9a2f77e5ad508b18671571c0b3f6f79ea709a8Kristen Carlson Accardi if (ACPI_FAILURE(status)) 821fe9a2f77e5ad508b18671571c0b3f6f79ea709a8Kristen Carlson Accardi goto fdd_out; 822fe9a2f77e5ad508b18671571c0b3f6f79ea709a8Kristen Carlson Accardi } 823c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 824f69cfdd24ac40ab7bbd00d6ad85e003da755e3a0Alex Chiang if (tmp == ds->handle) 825f69cfdd24ac40ab7bbd00d6ad85e003da755e3a0Alex Chiang add_dock_dependent_device(ds, handle); 826f69cfdd24ac40ab7bbd00d6ad85e003da755e3a0Alex Chiang 827fe9a2f77e5ad508b18671571c0b3f6f79ea709a8Kristen Carlson Accardifdd_out: 828c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown return AE_OK; 829c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown} 830c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 831c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org/* 832c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org * show_docked - read method for "docked" file in sysfs 833c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org */ 834c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.orgstatic ssize_t show_docked(struct device *dev, 835c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org struct device_attribute *attr, char *buf) 836c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org{ 837fc5a9f8841ee87d93376ada5d73117d4d6a373eaHolger Macht struct acpi_device *tmp; 838fc5a9f8841ee87d93376ada5d73117d4d6a373eaHolger Macht 839fe06fba292af5ed5c1c6ad9af3a9ef68da7a5088Alex Chiang struct dock_station *dock_station = dev->platform_data; 840c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org 841fc5a9f8841ee87d93376ada5d73117d4d6a373eaHolger Macht if (ACPI_SUCCESS(acpi_bus_get_device(dock_station->handle, &tmp))) 842fc5a9f8841ee87d93376ada5d73117d4d6a373eaHolger Macht return snprintf(buf, PAGE_SIZE, "1\n"); 843fc5a9f8841ee87d93376ada5d73117d4d6a373eaHolger Macht return snprintf(buf, PAGE_SIZE, "0\n"); 844c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org} 845e5685b9d35c2cc0a98425b05df30cb837dd1e632Adrian Bunkstatic DEVICE_ATTR(docked, S_IRUGO, show_docked, NULL); 846c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org 847c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org/* 848a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardi * show_flags - read method for flags file in sysfs 849a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardi */ 850a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardistatic ssize_t show_flags(struct device *dev, 851a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardi struct device_attribute *attr, char *buf) 852a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardi{ 853fe06fba292af5ed5c1c6ad9af3a9ef68da7a5088Alex Chiang struct dock_station *dock_station = dev->platform_data; 854a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardi return snprintf(buf, PAGE_SIZE, "%d\n", dock_station->flags); 855a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardi 856a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardi} 857e5685b9d35c2cc0a98425b05df30cb837dd1e632Adrian Bunkstatic DEVICE_ATTR(flags, S_IRUGO, show_flags, NULL); 858a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardi 859a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardi/* 860c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org * write_undock - write method for "undock" file in sysfs 861c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org */ 862c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.orgstatic ssize_t write_undock(struct device *dev, struct device_attribute *attr, 863c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org const char *buf, size_t count) 864c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org{ 865c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org int ret; 866fe06fba292af5ed5c1c6ad9af3a9ef68da7a5088Alex Chiang struct dock_station *dock_station = dev->platform_data; 867c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org 868c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org if (!count) 869c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org return -EINVAL; 870c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org 8719171f83488940e4ff85f1b7137773eb1f306cdefHolger Macht begin_undock(dock_station); 872c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org ret = handle_eject_request(dock_station, ACPI_NOTIFY_EJECT_REQUEST); 873c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org return ret ? ret: count; 874c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org} 875e5685b9d35c2cc0a98425b05df30cb837dd1e632Adrian Bunkstatic DEVICE_ATTR(undock, S_IWUSR, NULL, write_undock); 876c80fdbe81a617c82e2f95233f8ddcf046ffe21b3brandon@ifup.org 877ac122bb64b0d51f0512185d3522a75f3f3a80bc9Ilya A. Volynets-Evenbakh/* 878ac122bb64b0d51f0512185d3522a75f3f3a80bc9Ilya A. Volynets-Evenbakh * show_dock_uid - read method for "uid" file in sysfs 879ac122bb64b0d51f0512185d3522a75f3f3a80bc9Ilya A. Volynets-Evenbakh */ 880ac122bb64b0d51f0512185d3522a75f3f3a80bc9Ilya A. Volynets-Evenbakhstatic ssize_t show_dock_uid(struct device *dev, 881ac122bb64b0d51f0512185d3522a75f3f3a80bc9Ilya A. Volynets-Evenbakh struct device_attribute *attr, char *buf) 882ac122bb64b0d51f0512185d3522a75f3f3a80bc9Ilya A. Volynets-Evenbakh{ 88327663c5855b10af9ec67bc7dfba001426ba21222Matthew Wilcox unsigned long long lbuf; 884fe06fba292af5ed5c1c6ad9af3a9ef68da7a5088Alex Chiang struct dock_station *dock_station = dev->platform_data; 88538ff4ffc039ba5a5878f2dcbb03d87c3a1f02f1bKristen Carlson Accardi acpi_status status = acpi_evaluate_integer(dock_station->handle, 88638ff4ffc039ba5a5878f2dcbb03d87c3a1f02f1bKristen Carlson Accardi "_UID", NULL, &lbuf); 88738ff4ffc039ba5a5878f2dcbb03d87c3a1f02f1bKristen Carlson Accardi if (ACPI_FAILURE(status)) 888ac122bb64b0d51f0512185d3522a75f3f3a80bc9Ilya A. Volynets-Evenbakh return 0; 88938ff4ffc039ba5a5878f2dcbb03d87c3a1f02f1bKristen Carlson Accardi 89027663c5855b10af9ec67bc7dfba001426ba21222Matthew Wilcox return snprintf(buf, PAGE_SIZE, "%llx\n", lbuf); 891ac122bb64b0d51f0512185d3522a75f3f3a80bc9Ilya A. Volynets-Evenbakh} 892e5685b9d35c2cc0a98425b05df30cb837dd1e632Adrian Bunkstatic DEVICE_ATTR(uid, S_IRUGO, show_dock_uid, NULL); 893ac122bb64b0d51f0512185d3522a75f3f3a80bc9Ilya A. Volynets-Evenbakh 8948652b00fd6416773f113dab3dfa0d4509def825bShaohua Listatic ssize_t show_dock_type(struct device *dev, 8958652b00fd6416773f113dab3dfa0d4509def825bShaohua Li struct device_attribute *attr, char *buf) 8968652b00fd6416773f113dab3dfa0d4509def825bShaohua Li{ 897fe06fba292af5ed5c1c6ad9af3a9ef68da7a5088Alex Chiang struct dock_station *dock_station = dev->platform_data; 8988652b00fd6416773f113dab3dfa0d4509def825bShaohua Li char *type; 8998652b00fd6416773f113dab3dfa0d4509def825bShaohua Li 9008652b00fd6416773f113dab3dfa0d4509def825bShaohua Li if (dock_station->flags & DOCK_IS_DOCK) 9018652b00fd6416773f113dab3dfa0d4509def825bShaohua Li type = "dock_station"; 9028652b00fd6416773f113dab3dfa0d4509def825bShaohua Li else if (dock_station->flags & DOCK_IS_ATA) 9038652b00fd6416773f113dab3dfa0d4509def825bShaohua Li type = "ata_bay"; 9048652b00fd6416773f113dab3dfa0d4509def825bShaohua Li else if (dock_station->flags & DOCK_IS_BAT) 9058652b00fd6416773f113dab3dfa0d4509def825bShaohua Li type = "battery_bay"; 9068652b00fd6416773f113dab3dfa0d4509def825bShaohua Li else 9078652b00fd6416773f113dab3dfa0d4509def825bShaohua Li type = "unknown"; 9088652b00fd6416773f113dab3dfa0d4509def825bShaohua Li 9098652b00fd6416773f113dab3dfa0d4509def825bShaohua Li return snprintf(buf, PAGE_SIZE, "%s\n", type); 9108652b00fd6416773f113dab3dfa0d4509def825bShaohua Li} 9118652b00fd6416773f113dab3dfa0d4509def825bShaohua Listatic DEVICE_ATTR(type, S_IRUGO, show_dock_type, NULL); 9128652b00fd6416773f113dab3dfa0d4509def825bShaohua Li 9135f46c2f25cfbb5faca7550738ac42c4d1491ddc8Alex Chiangstatic struct attribute *dock_attributes[] = { 9145f46c2f25cfbb5faca7550738ac42c4d1491ddc8Alex Chiang &dev_attr_docked.attr, 9155f46c2f25cfbb5faca7550738ac42c4d1491ddc8Alex Chiang &dev_attr_flags.attr, 9165f46c2f25cfbb5faca7550738ac42c4d1491ddc8Alex Chiang &dev_attr_undock.attr, 9175f46c2f25cfbb5faca7550738ac42c4d1491ddc8Alex Chiang &dev_attr_uid.attr, 9185f46c2f25cfbb5faca7550738ac42c4d1491ddc8Alex Chiang &dev_attr_type.attr, 9195f46c2f25cfbb5faca7550738ac42c4d1491ddc8Alex Chiang NULL 9205f46c2f25cfbb5faca7550738ac42c4d1491ddc8Alex Chiang}; 9215f46c2f25cfbb5faca7550738ac42c4d1491ddc8Alex Chiang 9225f46c2f25cfbb5faca7550738ac42c4d1491ddc8Alex Chiangstatic struct attribute_group dock_attribute_group = { 9235f46c2f25cfbb5faca7550738ac42c4d1491ddc8Alex Chiang .attrs = dock_attributes 9245f46c2f25cfbb5faca7550738ac42c4d1491ddc8Alex Chiang}; 9255f46c2f25cfbb5faca7550738ac42c4d1491ddc8Alex Chiang 926c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown/** 927c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * dock_add - add a new dock station 928c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * @handle: the dock station handle 929c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * 930c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * allocated and initialize a new dock station device. Find all devices 931c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * that are on the dock station, and register for dock event notifications. 932c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown */ 933d38a5edf812c2f715242aa20b6beb785939a0096Uwe Kleine-Königstatic int __init dock_add(acpi_handle handle) 934c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown{ 935fe06fba292af5ed5c1c6ad9af3a9ef68da7a5088Alex Chiang int ret, id; 936fe06fba292af5ed5c1c6ad9af3a9ef68da7a5088Alex Chiang struct dock_station ds, *dock_station; 937747479a3fb42849fe73b9b1f7545d751bde7d632Alex Chiang struct platform_device *dd; 938c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 939fe06fba292af5ed5c1c6ad9af3a9ef68da7a5088Alex Chiang id = dock_station_count; 94049c6fb2e41d41c4c0c5c753b6960bc81fe658d20Alex Chiang memset(&ds, 0, sizeof(ds)); 941747479a3fb42849fe73b9b1f7545d751bde7d632Alex Chiang dd = platform_device_register_data(NULL, "dock", id, &ds, sizeof(ds)); 942747479a3fb42849fe73b9b1f7545d751bde7d632Alex Chiang if (IS_ERR(dd)) 943747479a3fb42849fe73b9b1f7545d751bde7d632Alex Chiang return PTR_ERR(dd); 944747479a3fb42849fe73b9b1f7545d751bde7d632Alex Chiang 945747479a3fb42849fe73b9b1f7545d751bde7d632Alex Chiang dock_station = dd->dev.platform_data; 946c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 947c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown dock_station->handle = handle; 948747479a3fb42849fe73b9b1f7545d751bde7d632Alex Chiang dock_station->dock_device = dd; 949c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown dock_station->last_dock_time = jiffies - HZ; 950747479a3fb42849fe73b9b1f7545d751bde7d632Alex Chiang 9518b0dc866dd9b8d10a53cb3537385a51b7ee54b62Kristen Carlson Accardi mutex_init(&dock_station->hp_lock); 952747479a3fb42849fe73b9b1f7545d751bde7d632Alex Chiang spin_lock_init(&dock_station->dd_lock); 953747479a3fb42849fe73b9b1f7545d751bde7d632Alex Chiang INIT_LIST_HEAD(&dock_station->sibling); 954747479a3fb42849fe73b9b1f7545d751bde7d632Alex Chiang INIT_LIST_HEAD(&dock_station->hotplug_devices); 95507a18684c92c0156f87ea158b5adc3022485f82aKristen Accardi ATOMIC_INIT_NOTIFIER_HEAD(&dock_notifier_list); 956747479a3fb42849fe73b9b1f7545d751bde7d632Alex Chiang INIT_LIST_HEAD(&dock_station->dependent_devices); 957a0cd35fdca0bb711854edeaf016cec6cdf82eecaKristen Carlson Accardi 9589ef2a9a9f08722998540ed2ff38bccd0c54344c8Kristen Carlson Accardi /* we want the dock device to send uevents */ 959747479a3fb42849fe73b9b1f7545d751bde7d632Alex Chiang dev_set_uevent_suppress(&dd->dev, 0); 9609ef2a9a9f08722998540ed2ff38bccd0c54344c8Kristen Carlson Accardi 961db350b084dc2cf816288643861ce07b0562dd723Shaohua Li if (is_dock(handle)) 962db350b084dc2cf816288643861ce07b0562dd723Shaohua Li dock_station->flags |= DOCK_IS_DOCK; 963db350b084dc2cf816288643861ce07b0562dd723Shaohua Li if (is_ata(handle)) 964db350b084dc2cf816288643861ce07b0562dd723Shaohua Li dock_station->flags |= DOCK_IS_ATA; 965db350b084dc2cf816288643861ce07b0562dd723Shaohua Li if (is_battery(handle)) 966db350b084dc2cf816288643861ce07b0562dd723Shaohua Li dock_station->flags |= DOCK_IS_BAT; 967db350b084dc2cf816288643861ce07b0562dd723Shaohua Li 968747479a3fb42849fe73b9b1f7545d751bde7d632Alex Chiang ret = sysfs_create_group(&dd->dev.kobj, &dock_attribute_group); 9698652b00fd6416773f113dab3dfa0d4509def825bShaohua Li if (ret) 9705f46c2f25cfbb5faca7550738ac42c4d1491ddc8Alex Chiang goto err_unregister; 971671adbec210efc15cef81b4616adae8bcd667296Kristen Carlson Accardi 972c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown /* Find dependent devices */ 973c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, 9742263576cfc6e8f6ab038126c3254404b9fcb1c33Lin Ming ACPI_UINT32_MAX, find_dock_devices, NULL, 9752263576cfc6e8f6ab038126c3254404b9fcb1c33Lin Ming dock_station, NULL); 976c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 977c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown /* add the dock station as a device dependent on itself */ 978f69cfdd24ac40ab7bbd00d6ad85e003da755e3a0Alex Chiang ret = add_dock_dependent_device(dock_station, handle); 979f69cfdd24ac40ab7bbd00d6ad85e003da755e3a0Alex Chiang if (ret) 9805f46c2f25cfbb5faca7550738ac42c4d1491ddc8Alex Chiang goto err_rmgroup; 981c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 982db350b084dc2cf816288643861ce07b0562dd723Shaohua Li dock_station_count++; 98350d716e477a456f6ef8ef05f06a34f3d96b66e80Alex Chiang list_add(&dock_station->sibling, &dock_stations); 984c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown return 0; 985c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 9865f46c2f25cfbb5faca7550738ac42c4d1491ddc8Alex Chiangerr_rmgroup: 987747479a3fb42849fe73b9b1f7545d751bde7d632Alex Chiang sysfs_remove_group(&dd->dev.kobj, &dock_attribute_group); 9885f46c2f25cfbb5faca7550738ac42c4d1491ddc8Alex Chiangerr_unregister: 989747479a3fb42849fe73b9b1f7545d751bde7d632Alex Chiang platform_device_unregister(dd); 9905f46c2f25cfbb5faca7550738ac42c4d1491ddc8Alex Chiang printk(KERN_ERR "%s encountered error %d\n", __func__, ret); 991c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown return ret; 992c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown} 993c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 994c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown/** 995c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * dock_remove - free up resources related to the dock station 996c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown */ 997747479a3fb42849fe73b9b1f7545d751bde7d632Alex Chiangstatic int dock_remove(struct dock_station *ds) 998c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown{ 999c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown struct dock_dependent_device *dd, *tmp; 1000747479a3fb42849fe73b9b1f7545d751bde7d632Alex Chiang struct platform_device *dock_device = ds->dock_device; 1001c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 1002db350b084dc2cf816288643861ce07b0562dd723Shaohua Li if (!dock_station_count) 1003c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown return 0; 1004c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 1005c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown /* remove dependent devices */ 1006747479a3fb42849fe73b9b1f7545d751bde7d632Alex Chiang list_for_each_entry_safe(dd, tmp, &ds->dependent_devices, list) 1007747479a3fb42849fe73b9b1f7545d751bde7d632Alex Chiang kfree(dd); 1008c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 1009747479a3fb42849fe73b9b1f7545d751bde7d632Alex Chiang list_del(&ds->sibling); 1010c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 1011671adbec210efc15cef81b4616adae8bcd667296Kristen Carlson Accardi /* cleanup sysfs */ 10125f46c2f25cfbb5faca7550738ac42c4d1491ddc8Alex Chiang sysfs_remove_group(&dock_device->dev.kobj, &dock_attribute_group); 10130f6f2804563eee64f0fc7cbcb009b98b6f332af6Kristen Carlson Accardi platform_device_unregister(dock_device); 1014671adbec210efc15cef81b4616adae8bcd667296Kristen Carlson Accardi 1015c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown return 0; 1016c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown} 1017c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 1018c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown/** 1019c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * find_dock - look for a dock station 1020c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * @handle: acpi handle of a device 1021c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * @lvl: unused 1022c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * @context: counter of dock stations found 1023c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * @rv: unused 1024c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * 1025c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown * This is called by acpi_walk_namespace to look for dock stations. 1026c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown */ 1027d38a5edf812c2f715242aa20b6beb785939a0096Uwe Kleine-Königstatic __init acpi_status 1028c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brownfind_dock(acpi_handle handle, u32 lvl, void *context, void **rv) 1029c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown{ 1030747479a3fb42849fe73b9b1f7545d751bde7d632Alex Chiang if (is_dock(handle)) 10311ee4d61fd9822fb89e63b88a66848477087cd82eZhang Rui dock_add(handle); 1032747479a3fb42849fe73b9b1f7545d751bde7d632Alex Chiang 10331ee4d61fd9822fb89e63b88a66848477087cd82eZhang Rui return AE_OK; 1034c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown} 1035c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 1036d38a5edf812c2f715242aa20b6beb785939a0096Uwe Kleine-Königstatic __init acpi_status 1037db350b084dc2cf816288643861ce07b0562dd723Shaohua Lifind_bay(acpi_handle handle, u32 lvl, void *context, void **rv) 1038c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown{ 103961b836958371c717d1e6d4fea1d2c512969ad20bShaohua Li /* If bay is a dock, it's already handled */ 104061b836958371c717d1e6d4fea1d2c512969ad20bShaohua Li if (is_ejectable_bay(handle) && !is_dock(handle)) 1041db350b084dc2cf816288643861ce07b0562dd723Shaohua Li dock_add(handle); 1042db350b084dc2cf816288643861ce07b0562dd723Shaohua Li return AE_OK; 1043db350b084dc2cf816288643861ce07b0562dd723Shaohua Li} 1044c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 1045db350b084dc2cf816288643861ce07b0562dd723Shaohua Listatic int __init dock_init(void) 1046db350b084dc2cf816288643861ce07b0562dd723Shaohua Li{ 1047816c2eda3ce8fa7eb62f22e01e2ec7a3f7d677c0Len Brown if (acpi_disabled) 1048816c2eda3ce8fa7eb62f22e01e2ec7a3f7d677c0Len Brown return 0; 1049816c2eda3ce8fa7eb62f22e01e2ec7a3f7d677c0Len Brown 1050c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown /* look for a dock station */ 1051c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, 10522263576cfc6e8f6ab038126c3254404b9fcb1c33Lin Ming ACPI_UINT32_MAX, find_dock, NULL, NULL, NULL); 1053c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 1054db350b084dc2cf816288643861ce07b0562dd723Shaohua Li /* look for bay */ 1055db350b084dc2cf816288643861ce07b0562dd723Shaohua Li acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, 10562263576cfc6e8f6ab038126c3254404b9fcb1c33Lin Ming ACPI_UINT32_MAX, find_bay, NULL, NULL, NULL); 1057db350b084dc2cf816288643861ce07b0562dd723Shaohua Li if (!dock_station_count) { 1058db350b084dc2cf816288643861ce07b0562dd723Shaohua Li printk(KERN_INFO PREFIX "No dock devices found.\n"); 1059db350b084dc2cf816288643861ce07b0562dd723Shaohua Li return 0; 1060db350b084dc2cf816288643861ce07b0562dd723Shaohua Li } 1061c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 10626bd00a61ab63d4ceb635ae0316353c11c900b8d8Shaohua Li register_acpi_bus_notifier(&dock_acpi_notifier); 1063db350b084dc2cf816288643861ce07b0562dd723Shaohua Li printk(KERN_INFO PREFIX "%s: %d docks/bays found\n", 1064db350b084dc2cf816288643861ce07b0562dd723Shaohua Li ACPI_DOCK_DRIVER_DESCRIPTION, dock_station_count); 1065c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown return 0; 1066c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown} 1067c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 1068c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brownstatic void __exit dock_exit(void) 1069c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown{ 1070747479a3fb42849fe73b9b1f7545d751bde7d632Alex Chiang struct dock_station *tmp, *dock_station; 1071db350b084dc2cf816288643861ce07b0562dd723Shaohua Li 10726bd00a61ab63d4ceb635ae0316353c11c900b8d8Shaohua Li unregister_acpi_bus_notifier(&dock_acpi_notifier); 107350d716e477a456f6ef8ef05f06a34f3d96b66e80Alex Chiang list_for_each_entry_safe(dock_station, tmp, &dock_stations, sibling) 1074db350b084dc2cf816288643861ce07b0562dd723Shaohua Li dock_remove(dock_station); 1075c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown} 1076c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brown 1077db350b084dc2cf816288643861ce07b0562dd723Shaohua Li/* 1078db350b084dc2cf816288643861ce07b0562dd723Shaohua Li * Must be called before drivers of devices in dock, otherwise we can't know 1079db350b084dc2cf816288643861ce07b0562dd723Shaohua Li * which devices are in a dock 1080db350b084dc2cf816288643861ce07b0562dd723Shaohua Li */ 1081db350b084dc2cf816288643861ce07b0562dd723Shaohua Lisubsys_initcall(dock_init); 1082c8f7a62cdde461914c6457d5f4362538ed810bf4Len Brownmodule_exit(dock_exit); 1083