diff options
Diffstat (limited to 'drivers/acpi/dock.c')
| -rw-r--r-- | drivers/acpi/dock.c | 223 |
1 files changed, 175 insertions, 48 deletions
diff --git a/drivers/acpi/dock.c b/drivers/acpi/dock.c index 7bdf93b7469..799a0fdbb62 100644 --- a/drivers/acpi/dock.c +++ b/drivers/acpi/dock.c @@ -48,7 +48,6 @@ MODULE_PARM_DESC(immediate_undock, "1 (default) will cause the driver to " " before undocking"); static struct atomic_notifier_head dock_notifier_list; -static struct platform_device *dock_device; static char dock_device_name[] = "dock"; static const struct acpi_device_id dock_device_ids[] = { @@ -65,7 +64,12 @@ struct dock_station { struct mutex hp_lock; struct list_head dependent_devices; struct list_head hotplug_devices; + + struct list_head sibiling; + struct platform_device *dock_device; }; +static LIST_HEAD(dock_stations); +static int dock_station_count; struct dock_dependent_device { struct list_head list; @@ -77,11 +81,12 @@ struct dock_dependent_device { #define DOCK_DOCKING 0x00000001 #define DOCK_UNDOCKING 0x00000002 +#define DOCK_IS_DOCK 0x00000010 +#define DOCK_IS_ATA 0x00000020 +#define DOCK_IS_BAT 0x00000040 #define DOCK_EVENT 3 #define UNDOCK_EVENT 2 -static struct dock_station *dock_station; - /***************************************************************************** * Dock Dependent device functions * *****************************************************************************/ @@ -199,6 +204,60 @@ static int is_dock(acpi_handle handle) return 1; } +static int is_ejectable(acpi_handle handle) +{ + acpi_status status; + acpi_handle tmp; + + status = acpi_get_handle(handle, "_EJ0", &tmp); + if (ACPI_FAILURE(status)) + return 0; + return 1; +} + +static int is_ata(acpi_handle handle) +{ + acpi_handle tmp; + + if ((ACPI_SUCCESS(acpi_get_handle(handle, "_GTF", &tmp))) || + (ACPI_SUCCESS(acpi_get_handle(handle, "_GTM", &tmp))) || + (ACPI_SUCCESS(acpi_get_handle(handle, "_STM", &tmp))) || + (ACPI_SUCCESS(acpi_get_handle(handle, "_SDD", &tmp)))) + return 1; + + return 0; +} + +static int is_battery(acpi_handle handle) +{ + struct acpi_device_info *info; + struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; + int ret = 1; + + if (!ACPI_SUCCESS(acpi_get_object_info(handle, &buffer))) + return 0; + info = buffer.pointer; + if (!(info->valid & ACPI_VALID_HID)) + ret = 0; + else + ret = !strcmp("PNP0C0A", info->hardware_id.value); + + kfree(buffer.pointer); + return ret; +} + +static int is_ejectable_bay(acpi_handle handle) +{ + acpi_handle phandle; + if (!is_ejectable(handle)) + return 0; + if (is_battery(handle) || is_ata(handle)) + return 1; + if (!acpi_get_parent(handle, &phandle) && is_ata(phandle)) + return 1; + return 0; +} + /** * is_dock_device - see if a device is on a dock station * @handle: acpi handle of the device @@ -209,11 +268,17 @@ static int is_dock(acpi_handle handle) */ int is_dock_device(acpi_handle handle) { - if (!dock_station) + struct dock_station *dock_station; + + if (!dock_station_count) return 0; - if (is_dock(handle) || find_dock_dependent_device(dock_station, handle)) + if (is_dock(handle)) return 1; + list_for_each_entry(dock_station, &dock_stations, sibiling) { + if (find_dock_dependent_device(dock_station, handle)) + return 1; + } return 0; } @@ -341,7 +406,7 @@ static void hotplug_dock_devices(struct dock_station *ds, u32 event) static void dock_event(struct dock_station *ds, u32 event, int num) { - struct device *dev = &dock_device->dev; + struct device *dev = &ds->dock_device->dev; char event_string[13]; char *envp[] = { event_string, NULL }; @@ -414,7 +479,7 @@ static void handle_dock(struct dock_station *ds, int dock) arg.type = ACPI_TYPE_INTEGER; arg.integer.value = dock; status = acpi_evaluate_object(ds->handle, "_DCK", &arg_list, &buffer); - if (ACPI_FAILURE(status)) + if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) printk(KERN_ERR PREFIX "%s - failed to execute _DCK\n", (char *)name_buffer.pointer); kfree(buffer.pointer); @@ -498,7 +563,7 @@ static int dock_in_progress(struct dock_station *ds) */ int register_dock_notifier(struct notifier_block *nb) { - if (!dock_station) + if (!dock_station_count) return -ENODEV; return atomic_notifier_chain_register(&dock_notifier_list, nb); @@ -512,7 +577,7 @@ EXPORT_SYMBOL_GPL(register_dock_notifier); */ void unregister_dock_notifier(struct notifier_block *nb) { - if (!dock_station) + if (!dock_station_count) return; atomic_notifier_chain_unregister(&dock_notifier_list, nb); @@ -535,20 +600,23 @@ register_hotplug_dock_device(acpi_handle handle, acpi_notify_handler handler, void *context) { struct dock_dependent_device *dd; + struct dock_station *dock_station; - if (!dock_station) + if (!dock_station_count) return -ENODEV; /* * make sure this handle is for a device dependent on the dock, * this would include the dock station itself */ - dd = find_dock_dependent_device(dock_station, handle); - if (dd) { - dd->handler = handler; - dd->context = context; - dock_add_hotplug_device(dock_station, dd); - return 0; + list_for_each_entry(dock_station, &dock_stations, sibiling) { + dd = find_dock_dependent_device(dock_station, handle); + if (dd) { + dd->handler = handler; + dd->context = context; + dock_add_hotplug_device(dock_station, dd); + return 0; + } } return -EINVAL; @@ -563,13 +631,16 @@ EXPORT_SYMBOL_GPL(register_hotplug_dock_device); void unregister_hotplug_dock_device(acpi_handle handle) { struct dock_dependent_device *dd; + struct dock_station *dock_station; - if (!dock_station) + if (!dock_station_count) return; - dd = find_dock_dependent_device(dock_station, handle); - if (dd) - dock_del_hotplug_device(dock_station, dd); + list_for_each_entry(dock_station, &dock_stations, sibiling) { + dd = find_dock_dependent_device(dock_station, handle); + if (dd) + dock_del_hotplug_device(dock_station, dd); + } } EXPORT_SYMBOL_GPL(unregister_hotplug_dock_device); @@ -620,9 +691,28 @@ static void dock_notify(acpi_handle handle, u32 event, void *data) { struct dock_station *ds = data; struct acpi_device *tmp; + int surprise_removal = 0; + /* + * According to acpi spec 3.0a, if a DEVICE_CHECK notification + * is sent and _DCK is present, it is assumed to mean an undock + * request. + */ + if ((ds->flags & DOCK_IS_DOCK) && event == ACPI_NOTIFY_DEVICE_CHECK) + event = ACPI_NOTIFY_EJECT_REQUEST; + + /* + * dock station: BUS_CHECK - docked or surprise removal + * DEVICE_CHECK - undocked + * other device: BUS_CHECK/DEVICE_CHECK - added or surprise removal + * + * To simplify event handling, dock dependent device handler always + * get ACPI_NOTIFY_BUS_CHECK/ACPI_NOTIFY_DEVICE_CHECK for add and + * ACPI_NOTIFY_EJECT_REQUEST for removal + */ switch (event) { case ACPI_NOTIFY_BUS_CHECK: + case ACPI_NOTIFY_DEVICE_CHECK: if (!dock_in_progress(ds) && acpi_bus_get_device(ds->handle, &tmp)) { begin_dock(ds); @@ -638,20 +728,17 @@ static void dock_notify(acpi_handle handle, u32 event, void *data) complete_dock(ds); dock_event(ds, event, DOCK_EVENT); dock_lock(ds, 1); + break; } - break; - case ACPI_NOTIFY_DEVICE_CHECK: - /* - * According to acpi spec 3.0a, if a DEVICE_CHECK notification - * is sent and _DCK is present, it is assumed to mean an - * undock request. This notify routine will only be called - * for objects defining _DCK, so we will fall through to eject - * request here. However, we will pass an eject request through - * to the driver who wish to hotplug. - */ + if (dock_present(ds) || dock_in_progress(ds)) + break; + /* This is a surprise removal */ + surprise_removal = 1; + event = ACPI_NOTIFY_EJECT_REQUEST; + /* Fall back */ case ACPI_NOTIFY_EJECT_REQUEST: begin_undock(ds); - if (immediate_undock) + if (immediate_undock || surprise_removal) handle_eject_request(ds, event); else dock_event(ds, event, UNDOCK_EVENT); @@ -707,6 +794,8 @@ fdd_out: static ssize_t show_docked(struct device *dev, struct device_attribute *attr, char *buf) { + struct dock_station *dock_station = *((struct dock_station **) + dev->platform_data); return snprintf(buf, PAGE_SIZE, "%d\n", dock_present(dock_station)); } @@ -718,6 +807,8 @@ static DEVICE_ATTR(docked, S_IRUGO, show_docked, NULL); static ssize_t show_flags(struct device *dev, struct device_attribute *attr, char *buf) { + struct dock_station *dock_station = *((struct dock_station **) + dev->platform_data); return snprintf(buf, PAGE_SIZE, "%d\n", dock_station->flags); } @@ -730,6 +821,8 @@ static ssize_t write_undock(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { int ret; + struct dock_station *dock_station = *((struct dock_station **) + dev->platform_data); if (!count) return -EINVAL; @@ -747,6 +840,8 @@ static ssize_t show_dock_uid(struct device *dev, struct device_attribute *attr, char *buf) { unsigned long lbuf; + struct dock_station *dock_station = *((struct dock_station **) + dev->platform_data); acpi_status status = acpi_evaluate_integer(dock_station->handle, "_UID", NULL, &lbuf); if (ACPI_FAILURE(status)) @@ -768,6 +863,8 @@ static int dock_add(acpi_handle handle) int ret; acpi_status status; struct dock_dependent_device *dd; + struct dock_station *dock_station; + struct platform_device *dock_device; /* allocate & initialize the dock_station private data */ dock_station = kzalloc(sizeof(*dock_station), GFP_KERNEL); @@ -777,22 +874,34 @@ static int dock_add(acpi_handle handle) dock_station->last_dock_time = jiffies - HZ; INIT_LIST_HEAD(&dock_station->dependent_devices); INIT_LIST_HEAD(&dock_station->hotplug_devices); + INIT_LIST_HEAD(&dock_station->sibiling); spin_lock_init(&dock_station->dd_lock); mutex_init(&dock_station->hp_lock); ATOMIC_INIT_NOTIFIER_HEAD(&dock_notifier_list); /* initialize platform device stuff */ - dock_device = - platform_device_register_simple(dock_device_name, 0, NULL, 0); + dock_station->dock_device = + platform_device_register_simple(dock_device_name, + dock_station_count, NULL, 0); + dock_device = dock_station->dock_device; if (IS_ERR(dock_device)) { kfree(dock_station); dock_station = NULL; return PTR_ERR(dock_device); } + platform_device_add_data(dock_device, &dock_station, + sizeof(struct dock_station *)); /* we want the dock device to send uevents */ dock_device->dev.uevent_suppress = 0; + if (is_dock(handle)) + dock_station->flags |= DOCK_IS_DOCK; + if (is_ata(handle)) + dock_station->flags |= DOCK_IS_ATA; + if (is_battery(handle)) + dock_station->flags |= DOCK_IS_BAT; + ret = device_create_file(&dock_device->dev, &dev_attr_docked); if (ret) { printk("Error %d adding sysfs file\n", ret); @@ -858,8 +967,8 @@ static int dock_add(acpi_handle handle) goto dock_add_err; } - printk(KERN_INFO PREFIX "%s\n", ACPI_DOCK_DRIVER_DESCRIPTION); - + dock_station_count++; + list_add(&dock_station->sibiling, &dock_stations); return 0; dock_add_err: @@ -878,12 +987,13 @@ dock_add_err_unregister: /** * dock_remove - free up resources related to the dock station */ -static int dock_remove(void) +static int dock_remove(struct dock_station *dock_station) { struct dock_dependent_device *dd, *tmp; acpi_status status; + struct platform_device *dock_device = dock_station->dock_device; - if (!dock_station) + if (!dock_station_count) return 0; /* remove dependent devices */ @@ -923,41 +1033,58 @@ static int dock_remove(void) static acpi_status find_dock(acpi_handle handle, u32 lvl, void *context, void **rv) { - int *count = context; acpi_status status = AE_OK; if (is_dock(handle)) { if (dock_add(handle) >= 0) { - (*count)++; status = AE_CTRL_TERMINATE; } } return status; } -static int __init dock_init(void) +static acpi_status +find_bay(acpi_handle handle, u32 lvl, void *context, void **rv) { - int num = 0; - - dock_station = NULL; + /* If bay is in a dock, it's already handled */ + if (is_ejectable_bay(handle) && !is_dock_device(handle)) + dock_add(handle); + return AE_OK; +} +static int __init dock_init(void) +{ if (acpi_disabled) return 0; /* look for a dock station */ acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, - ACPI_UINT32_MAX, find_dock, &num, NULL); + ACPI_UINT32_MAX, find_dock, NULL, NULL); - if (!num) - printk(KERN_INFO "No dock devices found.\n"); + /* look for bay */ + acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, + ACPI_UINT32_MAX, find_bay, NULL, NULL); + if (!dock_station_count) { + printk(KERN_INFO PREFIX "No dock devices found.\n"); + return 0; + } + printk(KERN_INFO PREFIX "%s: %d docks/bays found\n", + ACPI_DOCK_DRIVER_DESCRIPTION, dock_station_count); return 0; } static void __exit dock_exit(void) { - dock_remove(); + struct dock_station *dock_station; + + list_for_each_entry(dock_station, &dock_stations, sibiling) + dock_remove(dock_station); } -postcore_initcall(dock_init); +/* + * Must be called before drivers of devices in dock, otherwise we can't know + * which devices are in a dock + */ +subsys_initcall(dock_init); module_exit(dock_exit); |