^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * dock.c - ACPI dock station driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2006, 2014, Intel Corp.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Author: Kristen Carlson Accardi <kristen.c.accardi@intel.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Rafael J. Wysocki <rafael.j.wysocki@intel.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/moduleparam.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/notifier.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/jiffies.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/stddef.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/acpi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include "internal.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) static bool immediate_undock = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) module_param(immediate_undock, bool, 0644);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) MODULE_PARM_DESC(immediate_undock, "1 (default) will cause the driver to "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) "undock immediately when the undock button is pressed, 0 will cause"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) " the driver to wait for userspace to write the undock sysfs file "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) " before undocking");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) struct dock_station {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) acpi_handle handle;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) unsigned long last_dock_time;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) u32 flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) struct list_head dependent_devices;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) struct list_head sibling;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) struct platform_device *dock_device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) static LIST_HEAD(dock_stations);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) static int dock_station_count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) struct dock_dependent_device {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) struct list_head list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) struct acpi_device *adev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) #define DOCK_DOCKING 0x00000001
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) #define DOCK_UNDOCKING 0x00000002
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) #define DOCK_IS_DOCK 0x00000010
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) #define DOCK_IS_ATA 0x00000020
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) #define DOCK_IS_BAT 0x00000040
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) #define DOCK_EVENT 3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) #define UNDOCK_EVENT 2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) enum dock_callback_type {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) DOCK_CALL_HANDLER,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) DOCK_CALL_FIXUP,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) DOCK_CALL_UEVENT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) /*****************************************************************************
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) * Dock Dependent device functions *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) *****************************************************************************/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) * add_dock_dependent_device - associate a device with the dock station
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) * @ds: Dock station.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) * @adev: Dependent ACPI device object.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) * Add the dependent device to the dock's dependent device list.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) static int add_dock_dependent_device(struct dock_station *ds,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) struct acpi_device *adev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) struct dock_dependent_device *dd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) dd = kzalloc(sizeof(*dd), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) if (!dd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) dd->adev = adev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) INIT_LIST_HEAD(&dd->list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) list_add_tail(&dd->list, &ds->dependent_devices);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) static void dock_hotplug_event(struct dock_dependent_device *dd, u32 event,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) enum dock_callback_type cb_type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) struct acpi_device *adev = dd->adev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) acpi_lock_hp_context();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) if (!adev->hp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) if (cb_type == DOCK_CALL_FIXUP) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) void (*fixup)(struct acpi_device *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) fixup = adev->hp->fixup;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) if (fixup) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) acpi_unlock_hp_context();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) fixup(adev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) } else if (cb_type == DOCK_CALL_UEVENT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) void (*uevent)(struct acpi_device *, u32);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) uevent = adev->hp->uevent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) if (uevent) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) acpi_unlock_hp_context();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) uevent(adev, event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) int (*notify)(struct acpi_device *, u32);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) notify = adev->hp->notify;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) if (notify) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) acpi_unlock_hp_context();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) notify(adev, event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) acpi_unlock_hp_context();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) static struct dock_station *find_dock_station(acpi_handle handle)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) struct dock_station *ds;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) list_for_each_entry(ds, &dock_stations, sibling)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) if (ds->handle == handle)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) return ds;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) * find_dock_dependent_device - get a device dependent on this dock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) * @ds: the dock station
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) * @adev: ACPI device object to find.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) * iterate over the dependent device list for this dock. If the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) * dependent device matches the handle, return.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) static struct dock_dependent_device *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) find_dock_dependent_device(struct dock_station *ds, struct acpi_device *adev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) struct dock_dependent_device *dd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) list_for_each_entry(dd, &ds->dependent_devices, list)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) if (adev == dd->adev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) return dd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) void register_dock_dependent_device(struct acpi_device *adev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) acpi_handle dshandle)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) struct dock_station *ds = find_dock_station(dshandle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) if (ds && !find_dock_dependent_device(ds, adev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) add_dock_dependent_device(ds, adev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) /*****************************************************************************
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) * Dock functions *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) *****************************************************************************/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) * is_dock_device - see if a device is on a dock station
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) * @adev: ACPI device object to check.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) * If this device is either the dock station itself,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) * or is a device dependent on the dock station, then it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) * is a dock device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) int is_dock_device(struct acpi_device *adev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) struct dock_station *dock_station;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) if (!dock_station_count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) if (acpi_dock_match(adev->handle))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) list_for_each_entry(dock_station, &dock_stations, sibling)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) if (find_dock_dependent_device(dock_station, adev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) EXPORT_SYMBOL_GPL(is_dock_device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) * dock_present - see if the dock station is present.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) * @ds: the dock station
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) * execute the _STA method. note that present does not
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) * imply that we are docked.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) static int dock_present(struct dock_station *ds)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) unsigned long long sta;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) acpi_status status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) if (ds) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) status = acpi_evaluate_integer(ds->handle, "_STA", NULL, &sta);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) if (ACPI_SUCCESS(status) && sta)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) * hot_remove_dock_devices - Remove dock station devices.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) * @ds: Dock station.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) static void hot_remove_dock_devices(struct dock_station *ds)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) struct dock_dependent_device *dd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) * Walk the list in reverse order so that devices that have been added
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) * last are removed first (in case there are some indirect dependencies
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) * between them).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) list_for_each_entry_reverse(dd, &ds->dependent_devices, list)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) dock_hotplug_event(dd, ACPI_NOTIFY_EJECT_REQUEST,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) DOCK_CALL_HANDLER);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) list_for_each_entry_reverse(dd, &ds->dependent_devices, list)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) acpi_bus_trim(dd->adev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) * hotplug_dock_devices - Insert devices on a dock station.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) * @ds: the dock station
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) * @event: either bus check or device check request
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) * Some devices on the dock station need to have drivers called
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) * to perform hotplug operations after a dock event has occurred.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) * Traverse the list of dock devices that have registered a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) * hotplug handler, and call the handler.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) static void hotplug_dock_devices(struct dock_station *ds, u32 event)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) struct dock_dependent_device *dd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) /* Call driver specific post-dock fixups. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) list_for_each_entry(dd, &ds->dependent_devices, list)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) dock_hotplug_event(dd, event, DOCK_CALL_FIXUP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) /* Call driver specific hotplug functions. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) list_for_each_entry(dd, &ds->dependent_devices, list)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) dock_hotplug_event(dd, event, DOCK_CALL_HANDLER);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) * Check if all devices have been enumerated already. If not, run
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) * acpi_bus_scan() for them and that will cause scan handlers to be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) * attached to device objects or acpi_drivers to be stopped/started if
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) * they are present.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) list_for_each_entry(dd, &ds->dependent_devices, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) struct acpi_device *adev = dd->adev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) if (!acpi_device_enumerated(adev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) int ret = acpi_bus_scan(adev->handle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) dev_dbg(&adev->dev, "scan error %d\n", -ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) static void dock_event(struct dock_station *ds, u32 event, int num)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) struct device *dev = &ds->dock_device->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) char event_string[13];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) char *envp[] = { event_string, NULL };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) struct dock_dependent_device *dd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) if (num == UNDOCK_EVENT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) sprintf(event_string, "EVENT=undock");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) sprintf(event_string, "EVENT=dock");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) * Indicate that the status of the dock station has
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) * changed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) if (num == DOCK_EVENT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) kobject_uevent_env(&dev->kobj, KOBJ_CHANGE, envp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) list_for_each_entry(dd, &ds->dependent_devices, list)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) dock_hotplug_event(dd, event, DOCK_CALL_UEVENT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) if (num != DOCK_EVENT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) kobject_uevent_env(&dev->kobj, KOBJ_CHANGE, envp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) * handle_dock - handle a dock event
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) * @ds: the dock station
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) * @dock: to dock, or undock - that is the question
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) * Execute the _DCK method in response to an acpi event
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) static void handle_dock(struct dock_station *ds, int dock)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) acpi_status status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) struct acpi_object_list arg_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) union acpi_object arg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) unsigned long long value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) acpi_handle_info(ds->handle, "%s\n", dock ? "docking" : "undocking");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) /* _DCK method has one argument */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) arg_list.count = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) arg_list.pointer = &arg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) arg.type = ACPI_TYPE_INTEGER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) arg.integer.value = dock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) status = acpi_evaluate_integer(ds->handle, "_DCK", &arg_list, &value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) if (ACPI_FAILURE(status) && status != AE_NOT_FOUND)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) acpi_handle_err(ds->handle, "Failed to execute _DCK (0x%x)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) static inline void dock(struct dock_station *ds)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) handle_dock(ds, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) static inline void undock(struct dock_station *ds)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) handle_dock(ds, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) static inline void begin_dock(struct dock_station *ds)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) ds->flags |= DOCK_DOCKING;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) static inline void complete_dock(struct dock_station *ds)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) ds->flags &= ~(DOCK_DOCKING);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) ds->last_dock_time = jiffies;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) static inline void begin_undock(struct dock_station *ds)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) ds->flags |= DOCK_UNDOCKING;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) static inline void complete_undock(struct dock_station *ds)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) ds->flags &= ~(DOCK_UNDOCKING);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) * dock_in_progress - see if we are in the middle of handling a dock event
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) * @ds: the dock station
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) * Sometimes while docking, false dock events can be sent to the driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) * because good connections aren't made or some other reason. Ignore these
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) * if we are in the middle of doing something.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) static int dock_in_progress(struct dock_station *ds)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) if ((ds->flags & DOCK_DOCKING) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) time_before(jiffies, (ds->last_dock_time + HZ)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) * handle_eject_request - handle an undock request checking for error conditions
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) * Check to make sure the dock device is still present, then undock and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) * hotremove all the devices that may need removing.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) static int handle_eject_request(struct dock_station *ds, u32 event)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) if (dock_in_progress(ds))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) return -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) * here we need to generate the undock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) * event prior to actually doing the undock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) * so that the device struct still exists.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) * Also, even send the dock event if the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) * device is not present anymore
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) dock_event(ds, event, UNDOCK_EVENT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) hot_remove_dock_devices(ds);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) undock(ds);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) acpi_evaluate_lck(ds->handle, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) acpi_evaluate_ej0(ds->handle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) if (dock_present(ds)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) acpi_handle_err(ds->handle, "Unable to undock!\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) return -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) complete_undock(ds);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) * dock_notify - Handle ACPI dock notification.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) * @adev: Dock station's ACPI device object.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) * @event: Event code.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) * If we are notified to dock, then check to see if the dock is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) * present and then dock. Notify all drivers of the dock event,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) * and then hotplug and devices that may need hotplugging.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) int dock_notify(struct acpi_device *adev, u32 event)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) acpi_handle handle = adev->handle;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) struct dock_station *ds = find_dock_station(handle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) int surprise_removal = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) if (!ds)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) * According to acpi spec 3.0a, if a DEVICE_CHECK notification
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) * is sent and _DCK is present, it is assumed to mean an undock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) * request.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) if ((ds->flags & DOCK_IS_DOCK) && event == ACPI_NOTIFY_DEVICE_CHECK)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) event = ACPI_NOTIFY_EJECT_REQUEST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) * dock station: BUS_CHECK - docked or surprise removal
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) * DEVICE_CHECK - undocked
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) * other device: BUS_CHECK/DEVICE_CHECK - added or surprise removal
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) * To simplify event handling, dock dependent device handler always
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) * get ACPI_NOTIFY_BUS_CHECK/ACPI_NOTIFY_DEVICE_CHECK for add and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) * ACPI_NOTIFY_EJECT_REQUEST for removal
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) switch (event) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) case ACPI_NOTIFY_BUS_CHECK:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) case ACPI_NOTIFY_DEVICE_CHECK:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) if (!dock_in_progress(ds) && !acpi_device_enumerated(adev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) begin_dock(ds);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) dock(ds);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) if (!dock_present(ds)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) acpi_handle_err(handle, "Unable to dock!\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) complete_dock(ds);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) hotplug_dock_devices(ds, event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) complete_dock(ds);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) dock_event(ds, event, DOCK_EVENT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) acpi_evaluate_lck(ds->handle, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) acpi_update_all_gpes();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) if (dock_present(ds) || dock_in_progress(ds))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) /* This is a surprise removal */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) surprise_removal = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) event = ACPI_NOTIFY_EJECT_REQUEST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) /* Fall back */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) fallthrough;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) case ACPI_NOTIFY_EJECT_REQUEST:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) begin_undock(ds);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) if ((immediate_undock && !(ds->flags & DOCK_IS_ATA))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) || surprise_removal)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) handle_eject_request(ds, event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) dock_event(ds, event, UNDOCK_EVENT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) * show_docked - read method for "docked" file in sysfs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) static ssize_t docked_show(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) struct device_attribute *attr, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) struct dock_station *dock_station = dev->platform_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) struct acpi_device *adev = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) acpi_bus_get_device(dock_station->handle, &adev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) return snprintf(buf, PAGE_SIZE, "%u\n", acpi_device_enumerated(adev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) static DEVICE_ATTR_RO(docked);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) * show_flags - read method for flags file in sysfs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) static ssize_t flags_show(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) struct device_attribute *attr, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) struct dock_station *dock_station = dev->platform_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) return snprintf(buf, PAGE_SIZE, "%d\n", dock_station->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) static DEVICE_ATTR_RO(flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) * write_undock - write method for "undock" file in sysfs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) static ssize_t undock_store(struct device *dev, struct device_attribute *attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) const char *buf, size_t count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) struct dock_station *dock_station = dev->platform_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) if (!count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) acpi_scan_lock_acquire();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) begin_undock(dock_station);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) ret = handle_eject_request(dock_station, ACPI_NOTIFY_EJECT_REQUEST);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) acpi_scan_lock_release();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) return ret ? ret: count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) static DEVICE_ATTR_WO(undock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) * show_dock_uid - read method for "uid" file in sysfs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) static ssize_t uid_show(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) struct device_attribute *attr, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) unsigned long long lbuf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) struct dock_station *dock_station = dev->platform_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) acpi_status status = acpi_evaluate_integer(dock_station->handle,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) "_UID", NULL, &lbuf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) if (ACPI_FAILURE(status))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) return snprintf(buf, PAGE_SIZE, "%llx\n", lbuf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) static DEVICE_ATTR_RO(uid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) static ssize_t type_show(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) struct device_attribute *attr, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) struct dock_station *dock_station = dev->platform_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) char *type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) if (dock_station->flags & DOCK_IS_DOCK)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) type = "dock_station";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) else if (dock_station->flags & DOCK_IS_ATA)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) type = "ata_bay";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) else if (dock_station->flags & DOCK_IS_BAT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) type = "battery_bay";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) type = "unknown";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) return snprintf(buf, PAGE_SIZE, "%s\n", type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) static DEVICE_ATTR_RO(type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) static struct attribute *dock_attributes[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) &dev_attr_docked.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) &dev_attr_flags.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) &dev_attr_undock.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) &dev_attr_uid.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) &dev_attr_type.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) static const struct attribute_group dock_attribute_group = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) .attrs = dock_attributes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) * acpi_dock_add - Add a new dock station
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) * @adev: Dock station ACPI device object.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) * allocated and initialize a new dock station device.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) void acpi_dock_add(struct acpi_device *adev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) struct dock_station *dock_station, ds = { NULL, };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) struct platform_device_info pdevinfo;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) acpi_handle handle = adev->handle;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) struct platform_device *dd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) memset(&pdevinfo, 0, sizeof(pdevinfo));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) pdevinfo.name = "dock";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) pdevinfo.id = dock_station_count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) pdevinfo.fwnode = acpi_fwnode_handle(adev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) pdevinfo.data = &ds;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) pdevinfo.size_data = sizeof(ds);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) dd = platform_device_register_full(&pdevinfo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) if (IS_ERR(dd))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) dock_station = dd->dev.platform_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) dock_station->handle = handle;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) dock_station->dock_device = dd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) dock_station->last_dock_time = jiffies - HZ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) INIT_LIST_HEAD(&dock_station->sibling);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) INIT_LIST_HEAD(&dock_station->dependent_devices);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) /* we want the dock device to send uevents */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) dev_set_uevent_suppress(&dd->dev, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) if (acpi_dock_match(handle))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) dock_station->flags |= DOCK_IS_DOCK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) if (acpi_ata_match(handle))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) dock_station->flags |= DOCK_IS_ATA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) if (acpi_device_is_battery(adev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) dock_station->flags |= DOCK_IS_BAT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) ret = sysfs_create_group(&dd->dev.kobj, &dock_attribute_group);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) goto err_unregister;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) /* add the dock station as a device dependent on itself */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) ret = add_dock_dependent_device(dock_station, adev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) goto err_rmgroup;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) dock_station_count++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) list_add(&dock_station->sibling, &dock_stations);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) adev->flags.is_dock_station = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) dev_info(&adev->dev, "ACPI dock station (docks/bays count: %d)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) dock_station_count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) err_rmgroup:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) sysfs_remove_group(&dd->dev.kobj, &dock_attribute_group);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) err_unregister:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) platform_device_unregister(dd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) acpi_handle_err(handle, "%s encountered error %d\n", __func__, ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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