![Len Brown](/assets/img/avatar_default.png)
add acpidump utility intel_idle driver now supports IVB Xeon turbostat can now count SMIs ACPI can now bind to USB3 hubs misc fixes
1685 lines
42 KiB
C
1685 lines
42 KiB
C
/*
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* scan.c - support for transforming the ACPI namespace into individual objects
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/kernel.h>
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#include <linux/acpi.h>
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#include <linux/signal.h>
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#include <linux/kthread.h>
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#include <linux/dmi.h>
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#include <linux/nls.h>
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#include <acpi/acpi_drivers.h>
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#include "internal.h"
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#define _COMPONENT ACPI_BUS_COMPONENT
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ACPI_MODULE_NAME("scan");
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#define STRUCT_TO_INT(s) (*((int*)&s))
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extern struct acpi_device *acpi_root;
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#define ACPI_BUS_CLASS "system_bus"
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#define ACPI_BUS_HID "LNXSYBUS"
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#define ACPI_BUS_DEVICE_NAME "System Bus"
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#define ACPI_IS_ROOT_DEVICE(device) (!(device)->parent)
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static const char *dummy_hid = "device";
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static LIST_HEAD(acpi_device_list);
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static LIST_HEAD(acpi_bus_id_list);
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DEFINE_MUTEX(acpi_device_lock);
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LIST_HEAD(acpi_wakeup_device_list);
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struct acpi_device_bus_id{
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char bus_id[15];
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unsigned int instance_no;
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struct list_head node;
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};
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/*
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* Creates hid/cid(s) string needed for modalias and uevent
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* e.g. on a device with hid:IBM0001 and cid:ACPI0001 you get:
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* char *modalias: "acpi:IBM0001:ACPI0001"
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*/
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static int create_modalias(struct acpi_device *acpi_dev, char *modalias,
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int size)
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{
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int len;
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int count;
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struct acpi_hardware_id *id;
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if (list_empty(&acpi_dev->pnp.ids))
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return 0;
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len = snprintf(modalias, size, "acpi:");
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size -= len;
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list_for_each_entry(id, &acpi_dev->pnp.ids, list) {
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count = snprintf(&modalias[len], size, "%s:", id->id);
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if (count < 0 || count >= size)
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return -EINVAL;
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len += count;
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size -= count;
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}
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modalias[len] = '\0';
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return len;
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}
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static ssize_t
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acpi_device_modalias_show(struct device *dev, struct device_attribute *attr, char *buf) {
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struct acpi_device *acpi_dev = to_acpi_device(dev);
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int len;
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/* Device has no HID and no CID or string is >1024 */
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len = create_modalias(acpi_dev, buf, 1024);
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if (len <= 0)
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return 0;
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buf[len++] = '\n';
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return len;
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}
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static DEVICE_ATTR(modalias, 0444, acpi_device_modalias_show, NULL);
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/**
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* acpi_bus_hot_remove_device: hot-remove a device and its children
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* @context: struct acpi_eject_event pointer (freed in this func)
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*
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* Hot-remove a device and its children. This function frees up the
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* memory space passed by arg context, so that the caller may call
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* this function asynchronously through acpi_os_hotplug_execute().
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*/
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void acpi_bus_hot_remove_device(void *context)
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{
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struct acpi_eject_event *ej_event = (struct acpi_eject_event *) context;
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struct acpi_device *device;
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acpi_handle handle = ej_event->handle;
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struct acpi_object_list arg_list;
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union acpi_object arg;
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acpi_status status = AE_OK;
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u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; /* default */
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if (acpi_bus_get_device(handle, &device))
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goto err_out;
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if (!device)
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goto err_out;
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ACPI_DEBUG_PRINT((ACPI_DB_INFO,
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"Hot-removing device %s...\n", dev_name(&device->dev)));
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if (acpi_bus_trim(device, 1)) {
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printk(KERN_ERR PREFIX
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"Removing device failed\n");
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goto err_out;
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}
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/* power off device */
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status = acpi_evaluate_object(handle, "_PS3", NULL, NULL);
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if (ACPI_FAILURE(status) && status != AE_NOT_FOUND)
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printk(KERN_WARNING PREFIX
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"Power-off device failed\n");
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if (device->flags.lockable) {
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arg_list.count = 1;
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arg_list.pointer = &arg;
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arg.type = ACPI_TYPE_INTEGER;
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arg.integer.value = 0;
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acpi_evaluate_object(handle, "_LCK", &arg_list, NULL);
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}
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arg_list.count = 1;
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arg_list.pointer = &arg;
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arg.type = ACPI_TYPE_INTEGER;
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arg.integer.value = 1;
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/*
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* TBD: _EJD support.
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*/
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status = acpi_evaluate_object(handle, "_EJ0", &arg_list, NULL);
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if (ACPI_FAILURE(status)) {
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if (status != AE_NOT_FOUND)
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printk(KERN_WARNING PREFIX
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"Eject device failed\n");
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goto err_out;
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}
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kfree(context);
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return;
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err_out:
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/* Inform firmware the hot-remove operation has completed w/ error */
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(void) acpi_evaluate_hotplug_ost(handle,
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ej_event->event, ost_code, NULL);
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kfree(context);
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return;
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}
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static ssize_t
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acpi_eject_store(struct device *d, struct device_attribute *attr,
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const char *buf, size_t count)
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{
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int ret = count;
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acpi_status status;
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acpi_object_type type = 0;
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struct acpi_device *acpi_device = to_acpi_device(d);
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struct acpi_eject_event *ej_event;
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if ((!count) || (buf[0] != '1')) {
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return -EINVAL;
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}
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#ifndef FORCE_EJECT
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if (acpi_device->driver == NULL) {
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ret = -ENODEV;
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goto err;
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}
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#endif
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status = acpi_get_type(acpi_device->handle, &type);
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if (ACPI_FAILURE(status) || (!acpi_device->flags.ejectable)) {
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ret = -ENODEV;
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goto err;
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}
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ej_event = kmalloc(sizeof(*ej_event), GFP_KERNEL);
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if (!ej_event) {
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ret = -ENOMEM;
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goto err;
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}
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ej_event->handle = acpi_device->handle;
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if (acpi_device->flags.eject_pending) {
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/* event originated from ACPI eject notification */
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ej_event->event = ACPI_NOTIFY_EJECT_REQUEST;
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acpi_device->flags.eject_pending = 0;
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} else {
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/* event originated from user */
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ej_event->event = ACPI_OST_EC_OSPM_EJECT;
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(void) acpi_evaluate_hotplug_ost(ej_event->handle,
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ej_event->event, ACPI_OST_SC_EJECT_IN_PROGRESS, NULL);
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}
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acpi_os_hotplug_execute(acpi_bus_hot_remove_device, (void *)ej_event);
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err:
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return ret;
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}
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static DEVICE_ATTR(eject, 0200, NULL, acpi_eject_store);
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static ssize_t
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acpi_device_hid_show(struct device *dev, struct device_attribute *attr, char *buf) {
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struct acpi_device *acpi_dev = to_acpi_device(dev);
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return sprintf(buf, "%s\n", acpi_device_hid(acpi_dev));
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}
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static DEVICE_ATTR(hid, 0444, acpi_device_hid_show, NULL);
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static ssize_t
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acpi_device_path_show(struct device *dev, struct device_attribute *attr, char *buf) {
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struct acpi_device *acpi_dev = to_acpi_device(dev);
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struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL};
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int result;
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result = acpi_get_name(acpi_dev->handle, ACPI_FULL_PATHNAME, &path);
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if (result)
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goto end;
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result = sprintf(buf, "%s\n", (char*)path.pointer);
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kfree(path.pointer);
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end:
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return result;
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}
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static DEVICE_ATTR(path, 0444, acpi_device_path_show, NULL);
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/* sysfs file that shows description text from the ACPI _STR method */
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static ssize_t description_show(struct device *dev,
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struct device_attribute *attr,
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char *buf) {
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struct acpi_device *acpi_dev = to_acpi_device(dev);
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int result;
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if (acpi_dev->pnp.str_obj == NULL)
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return 0;
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/*
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* The _STR object contains a Unicode identifier for a device.
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* We need to convert to utf-8 so it can be displayed.
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*/
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result = utf16s_to_utf8s(
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(wchar_t *)acpi_dev->pnp.str_obj->buffer.pointer,
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acpi_dev->pnp.str_obj->buffer.length,
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UTF16_LITTLE_ENDIAN, buf,
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PAGE_SIZE);
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buf[result++] = '\n';
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return result;
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}
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static DEVICE_ATTR(description, 0444, description_show, NULL);
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static int acpi_device_setup_files(struct acpi_device *dev)
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{
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struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
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acpi_status status;
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acpi_handle temp;
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int result = 0;
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/*
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* Devices gotten from FADT don't have a "path" attribute
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*/
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if (dev->handle) {
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result = device_create_file(&dev->dev, &dev_attr_path);
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if (result)
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goto end;
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}
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if (!list_empty(&dev->pnp.ids)) {
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result = device_create_file(&dev->dev, &dev_attr_hid);
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if (result)
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goto end;
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result = device_create_file(&dev->dev, &dev_attr_modalias);
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if (result)
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goto end;
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}
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/*
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* If device has _STR, 'description' file is created
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*/
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status = acpi_get_handle(dev->handle, "_STR", &temp);
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if (ACPI_SUCCESS(status)) {
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status = acpi_evaluate_object(dev->handle, "_STR",
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NULL, &buffer);
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if (ACPI_FAILURE(status))
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buffer.pointer = NULL;
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dev->pnp.str_obj = buffer.pointer;
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result = device_create_file(&dev->dev, &dev_attr_description);
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if (result)
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goto end;
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}
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/*
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* If device has _EJ0, 'eject' file is created that is used to trigger
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* hot-removal function from userland.
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*/
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status = acpi_get_handle(dev->handle, "_EJ0", &temp);
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if (ACPI_SUCCESS(status))
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result = device_create_file(&dev->dev, &dev_attr_eject);
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end:
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return result;
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}
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static void acpi_device_remove_files(struct acpi_device *dev)
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{
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acpi_status status;
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acpi_handle temp;
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/*
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* If device has _STR, remove 'description' file
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*/
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status = acpi_get_handle(dev->handle, "_STR", &temp);
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if (ACPI_SUCCESS(status)) {
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kfree(dev->pnp.str_obj);
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device_remove_file(&dev->dev, &dev_attr_description);
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}
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/*
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* If device has _EJ0, remove 'eject' file.
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*/
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status = acpi_get_handle(dev->handle, "_EJ0", &temp);
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if (ACPI_SUCCESS(status))
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device_remove_file(&dev->dev, &dev_attr_eject);
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device_remove_file(&dev->dev, &dev_attr_modalias);
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device_remove_file(&dev->dev, &dev_attr_hid);
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if (dev->handle)
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device_remove_file(&dev->dev, &dev_attr_path);
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}
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/* --------------------------------------------------------------------------
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ACPI Bus operations
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-------------------------------------------------------------------------- */
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int acpi_match_device_ids(struct acpi_device *device,
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const struct acpi_device_id *ids)
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{
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const struct acpi_device_id *id;
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struct acpi_hardware_id *hwid;
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/*
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* If the device is not present, it is unnecessary to load device
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* driver for it.
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*/
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if (!device->status.present)
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return -ENODEV;
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for (id = ids; id->id[0]; id++)
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list_for_each_entry(hwid, &device->pnp.ids, list)
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if (!strcmp((char *) id->id, hwid->id))
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return 0;
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return -ENOENT;
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}
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EXPORT_SYMBOL(acpi_match_device_ids);
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static void acpi_free_ids(struct acpi_device *device)
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{
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struct acpi_hardware_id *id, *tmp;
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list_for_each_entry_safe(id, tmp, &device->pnp.ids, list) {
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kfree(id->id);
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kfree(id);
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}
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}
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static void acpi_device_release(struct device *dev)
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{
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struct acpi_device *acpi_dev = to_acpi_device(dev);
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acpi_free_ids(acpi_dev);
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kfree(acpi_dev);
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}
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static int acpi_bus_match(struct device *dev, struct device_driver *drv)
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{
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struct acpi_device *acpi_dev = to_acpi_device(dev);
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struct acpi_driver *acpi_drv = to_acpi_driver(drv);
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return !acpi_match_device_ids(acpi_dev, acpi_drv->ids);
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}
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static int acpi_device_uevent(struct device *dev, struct kobj_uevent_env *env)
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{
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struct acpi_device *acpi_dev = to_acpi_device(dev);
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int len;
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if (list_empty(&acpi_dev->pnp.ids))
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return 0;
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if (add_uevent_var(env, "MODALIAS="))
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return -ENOMEM;
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len = create_modalias(acpi_dev, &env->buf[env->buflen - 1],
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sizeof(env->buf) - env->buflen);
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if (len >= (sizeof(env->buf) - env->buflen))
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return -ENOMEM;
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env->buflen += len;
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return 0;
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}
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static void acpi_device_notify(acpi_handle handle, u32 event, void *data)
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{
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struct acpi_device *device = data;
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device->driver->ops.notify(device, event);
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}
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static acpi_status acpi_device_notify_fixed(void *data)
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{
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struct acpi_device *device = data;
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/* Fixed hardware devices have no handles */
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acpi_device_notify(NULL, ACPI_FIXED_HARDWARE_EVENT, device);
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return AE_OK;
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}
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static int acpi_device_install_notify_handler(struct acpi_device *device)
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{
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acpi_status status;
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if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON)
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status =
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acpi_install_fixed_event_handler(ACPI_EVENT_POWER_BUTTON,
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acpi_device_notify_fixed,
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device);
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else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON)
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status =
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acpi_install_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON,
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acpi_device_notify_fixed,
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device);
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else
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status = acpi_install_notify_handler(device->handle,
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ACPI_DEVICE_NOTIFY,
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acpi_device_notify,
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device);
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if (ACPI_FAILURE(status))
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return -EINVAL;
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return 0;
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}
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|
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static void acpi_device_remove_notify_handler(struct acpi_device *device)
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{
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if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON)
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acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON,
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acpi_device_notify_fixed);
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else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON)
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acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON,
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acpi_device_notify_fixed);
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else
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acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY,
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acpi_device_notify);
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}
|
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|
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static int acpi_bus_driver_init(struct acpi_device *, struct acpi_driver *);
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static int acpi_start_single_object(struct acpi_device *);
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static int acpi_device_probe(struct device * dev)
|
|
{
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struct acpi_device *acpi_dev = to_acpi_device(dev);
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struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver);
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int ret;
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|
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ret = acpi_bus_driver_init(acpi_dev, acpi_drv);
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if (!ret) {
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if (acpi_dev->bus_ops.acpi_op_start)
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acpi_start_single_object(acpi_dev);
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|
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if (acpi_drv->ops.notify) {
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ret = acpi_device_install_notify_handler(acpi_dev);
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if (ret) {
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if (acpi_drv->ops.remove)
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acpi_drv->ops.remove(acpi_dev,
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acpi_dev->removal_type);
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return ret;
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}
|
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}
|
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|
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ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
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"Found driver [%s] for device [%s]\n",
|
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acpi_drv->name, acpi_dev->pnp.bus_id));
|
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get_device(dev);
|
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}
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return ret;
|
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}
|
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|
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static int acpi_device_remove(struct device * dev)
|
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{
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struct acpi_device *acpi_dev = to_acpi_device(dev);
|
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struct acpi_driver *acpi_drv = acpi_dev->driver;
|
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|
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if (acpi_drv) {
|
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if (acpi_drv->ops.notify)
|
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acpi_device_remove_notify_handler(acpi_dev);
|
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if (acpi_drv->ops.remove)
|
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acpi_drv->ops.remove(acpi_dev, acpi_dev->removal_type);
|
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}
|
|
acpi_dev->driver = NULL;
|
|
acpi_dev->driver_data = NULL;
|
|
|
|
put_device(dev);
|
|
return 0;
|
|
}
|
|
|
|
struct bus_type acpi_bus_type = {
|
|
.name = "acpi",
|
|
.match = acpi_bus_match,
|
|
.probe = acpi_device_probe,
|
|
.remove = acpi_device_remove,
|
|
.uevent = acpi_device_uevent,
|
|
};
|
|
|
|
static int acpi_device_register(struct acpi_device *device)
|
|
{
|
|
int result;
|
|
struct acpi_device_bus_id *acpi_device_bus_id, *new_bus_id;
|
|
int found = 0;
|
|
|
|
/*
|
|
* Linkage
|
|
* -------
|
|
* Link this device to its parent and siblings.
|
|
*/
|
|
INIT_LIST_HEAD(&device->children);
|
|
INIT_LIST_HEAD(&device->node);
|
|
INIT_LIST_HEAD(&device->wakeup_list);
|
|
INIT_LIST_HEAD(&device->physical_node_list);
|
|
mutex_init(&device->physical_node_lock);
|
|
|
|
new_bus_id = kzalloc(sizeof(struct acpi_device_bus_id), GFP_KERNEL);
|
|
if (!new_bus_id) {
|
|
printk(KERN_ERR PREFIX "Memory allocation error\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
mutex_lock(&acpi_device_lock);
|
|
/*
|
|
* Find suitable bus_id and instance number in acpi_bus_id_list
|
|
* If failed, create one and link it into acpi_bus_id_list
|
|
*/
|
|
list_for_each_entry(acpi_device_bus_id, &acpi_bus_id_list, node) {
|
|
if (!strcmp(acpi_device_bus_id->bus_id,
|
|
acpi_device_hid(device))) {
|
|
acpi_device_bus_id->instance_no++;
|
|
found = 1;
|
|
kfree(new_bus_id);
|
|
break;
|
|
}
|
|
}
|
|
if (!found) {
|
|
acpi_device_bus_id = new_bus_id;
|
|
strcpy(acpi_device_bus_id->bus_id, acpi_device_hid(device));
|
|
acpi_device_bus_id->instance_no = 0;
|
|
list_add_tail(&acpi_device_bus_id->node, &acpi_bus_id_list);
|
|
}
|
|
dev_set_name(&device->dev, "%s:%02x", acpi_device_bus_id->bus_id, acpi_device_bus_id->instance_no);
|
|
|
|
if (device->parent)
|
|
list_add_tail(&device->node, &device->parent->children);
|
|
|
|
if (device->wakeup.flags.valid)
|
|
list_add_tail(&device->wakeup_list, &acpi_wakeup_device_list);
|
|
mutex_unlock(&acpi_device_lock);
|
|
|
|
if (device->parent)
|
|
device->dev.parent = &device->parent->dev;
|
|
device->dev.bus = &acpi_bus_type;
|
|
device->dev.release = &acpi_device_release;
|
|
result = device_register(&device->dev);
|
|
if (result) {
|
|
dev_err(&device->dev, "Error registering device\n");
|
|
goto end;
|
|
}
|
|
|
|
result = acpi_device_setup_files(device);
|
|
if (result)
|
|
printk(KERN_ERR PREFIX "Error creating sysfs interface for device %s\n",
|
|
dev_name(&device->dev));
|
|
|
|
device->removal_type = ACPI_BUS_REMOVAL_NORMAL;
|
|
return 0;
|
|
end:
|
|
mutex_lock(&acpi_device_lock);
|
|
if (device->parent)
|
|
list_del(&device->node);
|
|
list_del(&device->wakeup_list);
|
|
mutex_unlock(&acpi_device_lock);
|
|
return result;
|
|
}
|
|
|
|
static void acpi_device_unregister(struct acpi_device *device, int type)
|
|
{
|
|
mutex_lock(&acpi_device_lock);
|
|
if (device->parent)
|
|
list_del(&device->node);
|
|
|
|
list_del(&device->wakeup_list);
|
|
mutex_unlock(&acpi_device_lock);
|
|
|
|
acpi_detach_data(device->handle, acpi_bus_data_handler);
|
|
|
|
acpi_device_remove_files(device);
|
|
device_unregister(&device->dev);
|
|
}
|
|
|
|
/* --------------------------------------------------------------------------
|
|
Driver Management
|
|
-------------------------------------------------------------------------- */
|
|
/**
|
|
* acpi_bus_driver_init - add a device to a driver
|
|
* @device: the device to add and initialize
|
|
* @driver: driver for the device
|
|
*
|
|
* Used to initialize a device via its device driver. Called whenever a
|
|
* driver is bound to a device. Invokes the driver's add() ops.
|
|
*/
|
|
static int
|
|
acpi_bus_driver_init(struct acpi_device *device, struct acpi_driver *driver)
|
|
{
|
|
int result = 0;
|
|
|
|
if (!device || !driver)
|
|
return -EINVAL;
|
|
|
|
if (!driver->ops.add)
|
|
return -ENOSYS;
|
|
|
|
result = driver->ops.add(device);
|
|
if (result) {
|
|
device->driver = NULL;
|
|
device->driver_data = NULL;
|
|
return result;
|
|
}
|
|
|
|
device->driver = driver;
|
|
|
|
/*
|
|
* TBD - Configuration Management: Assign resources to device based
|
|
* upon possible configuration and currently allocated resources.
|
|
*/
|
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
|
"Driver successfully bound to device\n"));
|
|
return 0;
|
|
}
|
|
|
|
static int acpi_start_single_object(struct acpi_device *device)
|
|
{
|
|
int result = 0;
|
|
struct acpi_driver *driver;
|
|
|
|
|
|
if (!(driver = device->driver))
|
|
return 0;
|
|
|
|
if (driver->ops.start) {
|
|
result = driver->ops.start(device);
|
|
if (result && driver->ops.remove)
|
|
driver->ops.remove(device, ACPI_BUS_REMOVAL_NORMAL);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* acpi_bus_register_driver - register a driver with the ACPI bus
|
|
* @driver: driver being registered
|
|
*
|
|
* Registers a driver with the ACPI bus. Searches the namespace for all
|
|
* devices that match the driver's criteria and binds. Returns zero for
|
|
* success or a negative error status for failure.
|
|
*/
|
|
int acpi_bus_register_driver(struct acpi_driver *driver)
|
|
{
|
|
int ret;
|
|
|
|
if (acpi_disabled)
|
|
return -ENODEV;
|
|
driver->drv.name = driver->name;
|
|
driver->drv.bus = &acpi_bus_type;
|
|
driver->drv.owner = driver->owner;
|
|
|
|
ret = driver_register(&driver->drv);
|
|
return ret;
|
|
}
|
|
|
|
EXPORT_SYMBOL(acpi_bus_register_driver);
|
|
|
|
/**
|
|
* acpi_bus_unregister_driver - unregisters a driver with the APIC bus
|
|
* @driver: driver to unregister
|
|
*
|
|
* Unregisters a driver with the ACPI bus. Searches the namespace for all
|
|
* devices that match the driver's criteria and unbinds.
|
|
*/
|
|
void acpi_bus_unregister_driver(struct acpi_driver *driver)
|
|
{
|
|
driver_unregister(&driver->drv);
|
|
}
|
|
|
|
EXPORT_SYMBOL(acpi_bus_unregister_driver);
|
|
|
|
/* --------------------------------------------------------------------------
|
|
Device Enumeration
|
|
-------------------------------------------------------------------------- */
|
|
static struct acpi_device *acpi_bus_get_parent(acpi_handle handle)
|
|
{
|
|
acpi_status status;
|
|
int ret;
|
|
struct acpi_device *device;
|
|
|
|
/*
|
|
* Fixed hardware devices do not appear in the namespace and do not
|
|
* have handles, but we fabricate acpi_devices for them, so we have
|
|
* to deal with them specially.
|
|
*/
|
|
if (handle == NULL)
|
|
return acpi_root;
|
|
|
|
do {
|
|
status = acpi_get_parent(handle, &handle);
|
|
if (status == AE_NULL_ENTRY)
|
|
return NULL;
|
|
if (ACPI_FAILURE(status))
|
|
return acpi_root;
|
|
|
|
ret = acpi_bus_get_device(handle, &device);
|
|
if (ret == 0)
|
|
return device;
|
|
} while (1);
|
|
}
|
|
|
|
acpi_status
|
|
acpi_bus_get_ejd(acpi_handle handle, acpi_handle *ejd)
|
|
{
|
|
acpi_status status;
|
|
acpi_handle tmp;
|
|
struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
|
|
union acpi_object *obj;
|
|
|
|
status = acpi_get_handle(handle, "_EJD", &tmp);
|
|
if (ACPI_FAILURE(status))
|
|
return status;
|
|
|
|
status = acpi_evaluate_object(handle, "_EJD", NULL, &buffer);
|
|
if (ACPI_SUCCESS(status)) {
|
|
obj = buffer.pointer;
|
|
status = acpi_get_handle(ACPI_ROOT_OBJECT, obj->string.pointer,
|
|
ejd);
|
|
kfree(buffer.pointer);
|
|
}
|
|
return status;
|
|
}
|
|
EXPORT_SYMBOL_GPL(acpi_bus_get_ejd);
|
|
|
|
void acpi_bus_data_handler(acpi_handle handle, void *context)
|
|
{
|
|
|
|
/* TBD */
|
|
|
|
return;
|
|
}
|
|
|
|
static int acpi_bus_get_perf_flags(struct acpi_device *device)
|
|
{
|
|
device->performance.state = ACPI_STATE_UNKNOWN;
|
|
return 0;
|
|
}
|
|
|
|
static acpi_status
|
|
acpi_bus_extract_wakeup_device_power_package(acpi_handle handle,
|
|
struct acpi_device_wakeup *wakeup)
|
|
{
|
|
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
|
|
union acpi_object *package = NULL;
|
|
union acpi_object *element = NULL;
|
|
acpi_status status;
|
|
int i = 0;
|
|
|
|
if (!wakeup)
|
|
return AE_BAD_PARAMETER;
|
|
|
|
/* _PRW */
|
|
status = acpi_evaluate_object(handle, "_PRW", NULL, &buffer);
|
|
if (ACPI_FAILURE(status)) {
|
|
ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRW"));
|
|
return status;
|
|
}
|
|
|
|
package = (union acpi_object *)buffer.pointer;
|
|
|
|
if (!package || (package->package.count < 2)) {
|
|
status = AE_BAD_DATA;
|
|
goto out;
|
|
}
|
|
|
|
element = &(package->package.elements[0]);
|
|
if (!element) {
|
|
status = AE_BAD_DATA;
|
|
goto out;
|
|
}
|
|
if (element->type == ACPI_TYPE_PACKAGE) {
|
|
if ((element->package.count < 2) ||
|
|
(element->package.elements[0].type !=
|
|
ACPI_TYPE_LOCAL_REFERENCE)
|
|
|| (element->package.elements[1].type != ACPI_TYPE_INTEGER)) {
|
|
status = AE_BAD_DATA;
|
|
goto out;
|
|
}
|
|
wakeup->gpe_device =
|
|
element->package.elements[0].reference.handle;
|
|
wakeup->gpe_number =
|
|
(u32) element->package.elements[1].integer.value;
|
|
} else if (element->type == ACPI_TYPE_INTEGER) {
|
|
wakeup->gpe_device = NULL;
|
|
wakeup->gpe_number = element->integer.value;
|
|
} else {
|
|
status = AE_BAD_DATA;
|
|
goto out;
|
|
}
|
|
|
|
element = &(package->package.elements[1]);
|
|
if (element->type != ACPI_TYPE_INTEGER) {
|
|
status = AE_BAD_DATA;
|
|
goto out;
|
|
}
|
|
wakeup->sleep_state = element->integer.value;
|
|
|
|
if ((package->package.count - 2) > ACPI_MAX_HANDLES) {
|
|
status = AE_NO_MEMORY;
|
|
goto out;
|
|
}
|
|
wakeup->resources.count = package->package.count - 2;
|
|
for (i = 0; i < wakeup->resources.count; i++) {
|
|
element = &(package->package.elements[i + 2]);
|
|
if (element->type != ACPI_TYPE_LOCAL_REFERENCE) {
|
|
status = AE_BAD_DATA;
|
|
goto out;
|
|
}
|
|
|
|
wakeup->resources.handles[i] = element->reference.handle;
|
|
}
|
|
|
|
acpi_setup_gpe_for_wake(handle, wakeup->gpe_device, wakeup->gpe_number);
|
|
|
|
out:
|
|
kfree(buffer.pointer);
|
|
|
|
return status;
|
|
}
|
|
|
|
static void acpi_bus_set_run_wake_flags(struct acpi_device *device)
|
|
{
|
|
struct acpi_device_id button_device_ids[] = {
|
|
{"PNP0C0D", 0},
|
|
{"PNP0C0C", 0},
|
|
{"PNP0C0E", 0},
|
|
{"", 0},
|
|
};
|
|
acpi_status status;
|
|
acpi_event_status event_status;
|
|
|
|
device->wakeup.flags.notifier_present = 0;
|
|
|
|
/* Power button, Lid switch always enable wakeup */
|
|
if (!acpi_match_device_ids(device, button_device_ids)) {
|
|
device->wakeup.flags.run_wake = 1;
|
|
device_set_wakeup_capable(&device->dev, true);
|
|
return;
|
|
}
|
|
|
|
status = acpi_get_gpe_status(device->wakeup.gpe_device,
|
|
device->wakeup.gpe_number,
|
|
&event_status);
|
|
if (status == AE_OK)
|
|
device->wakeup.flags.run_wake =
|
|
!!(event_status & ACPI_EVENT_FLAG_HANDLE);
|
|
}
|
|
|
|
static void acpi_bus_get_wakeup_device_flags(struct acpi_device *device)
|
|
{
|
|
acpi_handle temp;
|
|
acpi_status status = 0;
|
|
int psw_error;
|
|
|
|
/* Presence of _PRW indicates wake capable */
|
|
status = acpi_get_handle(device->handle, "_PRW", &temp);
|
|
if (ACPI_FAILURE(status))
|
|
return;
|
|
|
|
status = acpi_bus_extract_wakeup_device_power_package(device->handle,
|
|
&device->wakeup);
|
|
if (ACPI_FAILURE(status)) {
|
|
ACPI_EXCEPTION((AE_INFO, status, "Extracting _PRW package"));
|
|
return;
|
|
}
|
|
|
|
device->wakeup.flags.valid = 1;
|
|
device->wakeup.prepare_count = 0;
|
|
acpi_bus_set_run_wake_flags(device);
|
|
/* Call _PSW/_DSW object to disable its ability to wake the sleeping
|
|
* system for the ACPI device with the _PRW object.
|
|
* The _PSW object is depreciated in ACPI 3.0 and is replaced by _DSW.
|
|
* So it is necessary to call _DSW object first. Only when it is not
|
|
* present will the _PSW object used.
|
|
*/
|
|
psw_error = acpi_device_sleep_wake(device, 0, 0, 0);
|
|
if (psw_error)
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
|
"error in _DSW or _PSW evaluation\n"));
|
|
}
|
|
|
|
static void acpi_bus_add_power_resource(acpi_handle handle);
|
|
|
|
static int acpi_bus_get_power_flags(struct acpi_device *device)
|
|
{
|
|
acpi_status status = 0;
|
|
acpi_handle handle = NULL;
|
|
u32 i = 0;
|
|
|
|
|
|
/*
|
|
* Power Management Flags
|
|
*/
|
|
status = acpi_get_handle(device->handle, "_PSC", &handle);
|
|
if (ACPI_SUCCESS(status))
|
|
device->power.flags.explicit_get = 1;
|
|
status = acpi_get_handle(device->handle, "_IRC", &handle);
|
|
if (ACPI_SUCCESS(status))
|
|
device->power.flags.inrush_current = 1;
|
|
|
|
/*
|
|
* Enumerate supported power management states
|
|
*/
|
|
for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++) {
|
|
struct acpi_device_power_state *ps = &device->power.states[i];
|
|
char object_name[5] = { '_', 'P', 'R', '0' + i, '\0' };
|
|
|
|
/* Evaluate "_PRx" to se if power resources are referenced */
|
|
acpi_evaluate_reference(device->handle, object_name, NULL,
|
|
&ps->resources);
|
|
if (ps->resources.count) {
|
|
int j;
|
|
|
|
device->power.flags.power_resources = 1;
|
|
for (j = 0; j < ps->resources.count; j++)
|
|
acpi_bus_add_power_resource(ps->resources.handles[j]);
|
|
}
|
|
|
|
/* Evaluate "_PSx" to see if we can do explicit sets */
|
|
object_name[2] = 'S';
|
|
status = acpi_get_handle(device->handle, object_name, &handle);
|
|
if (ACPI_SUCCESS(status))
|
|
ps->flags.explicit_set = 1;
|
|
|
|
/*
|
|
* State is valid if there are means to put the device into it.
|
|
* D3hot is only valid if _PR3 present.
|
|
*/
|
|
if (ps->resources.count ||
|
|
(ps->flags.explicit_set && i < ACPI_STATE_D3_HOT))
|
|
ps->flags.valid = 1;
|
|
|
|
ps->power = -1; /* Unknown - driver assigned */
|
|
ps->latency = -1; /* Unknown - driver assigned */
|
|
}
|
|
|
|
/* Set defaults for D0 and D3 states (always valid) */
|
|
device->power.states[ACPI_STATE_D0].flags.valid = 1;
|
|
device->power.states[ACPI_STATE_D0].power = 100;
|
|
device->power.states[ACPI_STATE_D3].flags.valid = 1;
|
|
device->power.states[ACPI_STATE_D3].power = 0;
|
|
|
|
/* Set D3cold's explicit_set flag if _PS3 exists. */
|
|
if (device->power.states[ACPI_STATE_D3_HOT].flags.explicit_set)
|
|
device->power.states[ACPI_STATE_D3_COLD].flags.explicit_set = 1;
|
|
|
|
acpi_bus_init_power(device);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int acpi_bus_get_flags(struct acpi_device *device)
|
|
{
|
|
acpi_status status = AE_OK;
|
|
acpi_handle temp = NULL;
|
|
|
|
|
|
/* Presence of _STA indicates 'dynamic_status' */
|
|
status = acpi_get_handle(device->handle, "_STA", &temp);
|
|
if (ACPI_SUCCESS(status))
|
|
device->flags.dynamic_status = 1;
|
|
|
|
/* Presence of _RMV indicates 'removable' */
|
|
status = acpi_get_handle(device->handle, "_RMV", &temp);
|
|
if (ACPI_SUCCESS(status))
|
|
device->flags.removable = 1;
|
|
|
|
/* Presence of _EJD|_EJ0 indicates 'ejectable' */
|
|
status = acpi_get_handle(device->handle, "_EJD", &temp);
|
|
if (ACPI_SUCCESS(status))
|
|
device->flags.ejectable = 1;
|
|
else {
|
|
status = acpi_get_handle(device->handle, "_EJ0", &temp);
|
|
if (ACPI_SUCCESS(status))
|
|
device->flags.ejectable = 1;
|
|
}
|
|
|
|
/* Presence of _LCK indicates 'lockable' */
|
|
status = acpi_get_handle(device->handle, "_LCK", &temp);
|
|
if (ACPI_SUCCESS(status))
|
|
device->flags.lockable = 1;
|
|
|
|
/* Power resources cannot be power manageable. */
|
|
if (device->device_type == ACPI_BUS_TYPE_POWER)
|
|
return 0;
|
|
|
|
/* Presence of _PS0|_PR0 indicates 'power manageable' */
|
|
status = acpi_get_handle(device->handle, "_PS0", &temp);
|
|
if (ACPI_FAILURE(status))
|
|
status = acpi_get_handle(device->handle, "_PR0", &temp);
|
|
if (ACPI_SUCCESS(status))
|
|
device->flags.power_manageable = 1;
|
|
|
|
/* TBD: Performance management */
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void acpi_device_get_busid(struct acpi_device *device)
|
|
{
|
|
char bus_id[5] = { '?', 0 };
|
|
struct acpi_buffer buffer = { sizeof(bus_id), bus_id };
|
|
int i = 0;
|
|
|
|
/*
|
|
* Bus ID
|
|
* ------
|
|
* The device's Bus ID is simply the object name.
|
|
* TBD: Shouldn't this value be unique (within the ACPI namespace)?
|
|
*/
|
|
if (ACPI_IS_ROOT_DEVICE(device)) {
|
|
strcpy(device->pnp.bus_id, "ACPI");
|
|
return;
|
|
}
|
|
|
|
switch (device->device_type) {
|
|
case ACPI_BUS_TYPE_POWER_BUTTON:
|
|
strcpy(device->pnp.bus_id, "PWRF");
|
|
break;
|
|
case ACPI_BUS_TYPE_SLEEP_BUTTON:
|
|
strcpy(device->pnp.bus_id, "SLPF");
|
|
break;
|
|
default:
|
|
acpi_get_name(device->handle, ACPI_SINGLE_NAME, &buffer);
|
|
/* Clean up trailing underscores (if any) */
|
|
for (i = 3; i > 1; i--) {
|
|
if (bus_id[i] == '_')
|
|
bus_id[i] = '\0';
|
|
else
|
|
break;
|
|
}
|
|
strcpy(device->pnp.bus_id, bus_id);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* acpi_bay_match - see if a device is an ejectable driver bay
|
|
*
|
|
* If an acpi object is ejectable and has one of the ACPI ATA methods defined,
|
|
* then we can safely call it an ejectable drive bay
|
|
*/
|
|
static int acpi_bay_match(struct acpi_device *device){
|
|
acpi_status status;
|
|
acpi_handle handle;
|
|
acpi_handle tmp;
|
|
acpi_handle phandle;
|
|
|
|
handle = device->handle;
|
|
|
|
status = acpi_get_handle(handle, "_EJ0", &tmp);
|
|
if (ACPI_FAILURE(status))
|
|
return -ENODEV;
|
|
|
|
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 0;
|
|
|
|
if (acpi_get_parent(handle, &phandle))
|
|
return -ENODEV;
|
|
|
|
if ((ACPI_SUCCESS(acpi_get_handle(phandle, "_GTF", &tmp))) ||
|
|
(ACPI_SUCCESS(acpi_get_handle(phandle, "_GTM", &tmp))) ||
|
|
(ACPI_SUCCESS(acpi_get_handle(phandle, "_STM", &tmp))) ||
|
|
(ACPI_SUCCESS(acpi_get_handle(phandle, "_SDD", &tmp))))
|
|
return 0;
|
|
|
|
return -ENODEV;
|
|
}
|
|
|
|
/*
|
|
* acpi_dock_match - see if a device has a _DCK method
|
|
*/
|
|
static int acpi_dock_match(struct acpi_device *device)
|
|
{
|
|
acpi_handle tmp;
|
|
return acpi_get_handle(device->handle, "_DCK", &tmp);
|
|
}
|
|
|
|
const char *acpi_device_hid(struct acpi_device *device)
|
|
{
|
|
struct acpi_hardware_id *hid;
|
|
|
|
if (list_empty(&device->pnp.ids))
|
|
return dummy_hid;
|
|
|
|
hid = list_first_entry(&device->pnp.ids, struct acpi_hardware_id, list);
|
|
return hid->id;
|
|
}
|
|
EXPORT_SYMBOL(acpi_device_hid);
|
|
|
|
static void acpi_add_id(struct acpi_device *device, const char *dev_id)
|
|
{
|
|
struct acpi_hardware_id *id;
|
|
|
|
id = kmalloc(sizeof(*id), GFP_KERNEL);
|
|
if (!id)
|
|
return;
|
|
|
|
id->id = kstrdup(dev_id, GFP_KERNEL);
|
|
if (!id->id) {
|
|
kfree(id);
|
|
return;
|
|
}
|
|
|
|
list_add_tail(&id->list, &device->pnp.ids);
|
|
}
|
|
|
|
/*
|
|
* Old IBM workstations have a DSDT bug wherein the SMBus object
|
|
* lacks the SMBUS01 HID and the methods do not have the necessary "_"
|
|
* prefix. Work around this.
|
|
*/
|
|
static int acpi_ibm_smbus_match(struct acpi_device *device)
|
|
{
|
|
acpi_handle h_dummy;
|
|
struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL};
|
|
int result;
|
|
|
|
if (!dmi_name_in_vendors("IBM"))
|
|
return -ENODEV;
|
|
|
|
/* Look for SMBS object */
|
|
result = acpi_get_name(device->handle, ACPI_SINGLE_NAME, &path);
|
|
if (result)
|
|
return result;
|
|
|
|
if (strcmp("SMBS", path.pointer)) {
|
|
result = -ENODEV;
|
|
goto out;
|
|
}
|
|
|
|
/* Does it have the necessary (but misnamed) methods? */
|
|
result = -ENODEV;
|
|
if (ACPI_SUCCESS(acpi_get_handle(device->handle, "SBI", &h_dummy)) &&
|
|
ACPI_SUCCESS(acpi_get_handle(device->handle, "SBR", &h_dummy)) &&
|
|
ACPI_SUCCESS(acpi_get_handle(device->handle, "SBW", &h_dummy)))
|
|
result = 0;
|
|
out:
|
|
kfree(path.pointer);
|
|
return result;
|
|
}
|
|
|
|
static void acpi_device_set_id(struct acpi_device *device)
|
|
{
|
|
acpi_status status;
|
|
struct acpi_device_info *info;
|
|
struct acpica_device_id_list *cid_list;
|
|
int i;
|
|
|
|
switch (device->device_type) {
|
|
case ACPI_BUS_TYPE_DEVICE:
|
|
if (ACPI_IS_ROOT_DEVICE(device)) {
|
|
acpi_add_id(device, ACPI_SYSTEM_HID);
|
|
break;
|
|
}
|
|
|
|
status = acpi_get_object_info(device->handle, &info);
|
|
if (ACPI_FAILURE(status)) {
|
|
printk(KERN_ERR PREFIX "%s: Error reading device info\n", __func__);
|
|
return;
|
|
}
|
|
|
|
if (info->valid & ACPI_VALID_HID)
|
|
acpi_add_id(device, info->hardware_id.string);
|
|
if (info->valid & ACPI_VALID_CID) {
|
|
cid_list = &info->compatible_id_list;
|
|
for (i = 0; i < cid_list->count; i++)
|
|
acpi_add_id(device, cid_list->ids[i].string);
|
|
}
|
|
if (info->valid & ACPI_VALID_ADR) {
|
|
device->pnp.bus_address = info->address;
|
|
device->flags.bus_address = 1;
|
|
}
|
|
|
|
kfree(info);
|
|
|
|
/*
|
|
* Some devices don't reliably have _HIDs & _CIDs, so add
|
|
* synthetic HIDs to make sure drivers can find them.
|
|
*/
|
|
if (acpi_is_video_device(device))
|
|
acpi_add_id(device, ACPI_VIDEO_HID);
|
|
else if (ACPI_SUCCESS(acpi_bay_match(device)))
|
|
acpi_add_id(device, ACPI_BAY_HID);
|
|
else if (ACPI_SUCCESS(acpi_dock_match(device)))
|
|
acpi_add_id(device, ACPI_DOCK_HID);
|
|
else if (!acpi_ibm_smbus_match(device))
|
|
acpi_add_id(device, ACPI_SMBUS_IBM_HID);
|
|
else if (!acpi_device_hid(device) &&
|
|
ACPI_IS_ROOT_DEVICE(device->parent)) {
|
|
acpi_add_id(device, ACPI_BUS_HID); /* \_SB, LNXSYBUS */
|
|
strcpy(device->pnp.device_name, ACPI_BUS_DEVICE_NAME);
|
|
strcpy(device->pnp.device_class, ACPI_BUS_CLASS);
|
|
}
|
|
|
|
break;
|
|
case ACPI_BUS_TYPE_POWER:
|
|
acpi_add_id(device, ACPI_POWER_HID);
|
|
break;
|
|
case ACPI_BUS_TYPE_PROCESSOR:
|
|
acpi_add_id(device, ACPI_PROCESSOR_OBJECT_HID);
|
|
break;
|
|
case ACPI_BUS_TYPE_THERMAL:
|
|
acpi_add_id(device, ACPI_THERMAL_HID);
|
|
break;
|
|
case ACPI_BUS_TYPE_POWER_BUTTON:
|
|
acpi_add_id(device, ACPI_BUTTON_HID_POWERF);
|
|
break;
|
|
case ACPI_BUS_TYPE_SLEEP_BUTTON:
|
|
acpi_add_id(device, ACPI_BUTTON_HID_SLEEPF);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static int acpi_device_set_context(struct acpi_device *device)
|
|
{
|
|
acpi_status status;
|
|
|
|
/*
|
|
* Context
|
|
* -------
|
|
* Attach this 'struct acpi_device' to the ACPI object. This makes
|
|
* resolutions from handle->device very efficient. Fixed hardware
|
|
* devices have no handles, so we skip them.
|
|
*/
|
|
if (!device->handle)
|
|
return 0;
|
|
|
|
status = acpi_attach_data(device->handle,
|
|
acpi_bus_data_handler, device);
|
|
if (ACPI_SUCCESS(status))
|
|
return 0;
|
|
|
|
printk(KERN_ERR PREFIX "Error attaching device data\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
static int acpi_bus_remove(struct acpi_device *dev, int rmdevice)
|
|
{
|
|
if (!dev)
|
|
return -EINVAL;
|
|
|
|
dev->removal_type = ACPI_BUS_REMOVAL_EJECT;
|
|
device_release_driver(&dev->dev);
|
|
|
|
if (!rmdevice)
|
|
return 0;
|
|
|
|
/*
|
|
* unbind _ADR-Based Devices when hot removal
|
|
*/
|
|
if (dev->flags.bus_address) {
|
|
if ((dev->parent) && (dev->parent->ops.unbind))
|
|
dev->parent->ops.unbind(dev);
|
|
}
|
|
acpi_device_unregister(dev, ACPI_BUS_REMOVAL_EJECT);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int acpi_add_single_object(struct acpi_device **child,
|
|
acpi_handle handle, int type,
|
|
unsigned long long sta,
|
|
struct acpi_bus_ops *ops)
|
|
{
|
|
int result;
|
|
struct acpi_device *device;
|
|
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
|
|
|
|
device = kzalloc(sizeof(struct acpi_device), GFP_KERNEL);
|
|
if (!device) {
|
|
printk(KERN_ERR PREFIX "Memory allocation error\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
INIT_LIST_HEAD(&device->pnp.ids);
|
|
device->device_type = type;
|
|
device->handle = handle;
|
|
device->parent = acpi_bus_get_parent(handle);
|
|
device->bus_ops = *ops; /* workround for not call .start */
|
|
STRUCT_TO_INT(device->status) = sta;
|
|
|
|
acpi_device_get_busid(device);
|
|
|
|
/*
|
|
* Flags
|
|
* -----
|
|
* Note that we only look for object handles -- cannot evaluate objects
|
|
* until we know the device is present and properly initialized.
|
|
*/
|
|
result = acpi_bus_get_flags(device);
|
|
if (result)
|
|
goto end;
|
|
|
|
/*
|
|
* Initialize Device
|
|
* -----------------
|
|
* TBD: Synch with Core's enumeration/initialization process.
|
|
*/
|
|
acpi_device_set_id(device);
|
|
|
|
/*
|
|
* Power Management
|
|
* ----------------
|
|
*/
|
|
if (device->flags.power_manageable) {
|
|
result = acpi_bus_get_power_flags(device);
|
|
if (result)
|
|
goto end;
|
|
}
|
|
|
|
/*
|
|
* Wakeup device management
|
|
*-----------------------
|
|
*/
|
|
acpi_bus_get_wakeup_device_flags(device);
|
|
|
|
/*
|
|
* Performance Management
|
|
* ----------------------
|
|
*/
|
|
if (device->flags.performance_manageable) {
|
|
result = acpi_bus_get_perf_flags(device);
|
|
if (result)
|
|
goto end;
|
|
}
|
|
|
|
if ((result = acpi_device_set_context(device)))
|
|
goto end;
|
|
|
|
result = acpi_device_register(device);
|
|
|
|
/*
|
|
* Bind _ADR-Based Devices when hot add
|
|
*/
|
|
if (device->flags.bus_address) {
|
|
if (device->parent && device->parent->ops.bind)
|
|
device->parent->ops.bind(device);
|
|
}
|
|
|
|
end:
|
|
if (!result) {
|
|
acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer);
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
|
"Adding %s [%s] parent %s\n", dev_name(&device->dev),
|
|
(char *) buffer.pointer,
|
|
device->parent ? dev_name(&device->parent->dev) :
|
|
"(null)"));
|
|
kfree(buffer.pointer);
|
|
*child = device;
|
|
} else
|
|
acpi_device_release(&device->dev);
|
|
|
|
return result;
|
|
}
|
|
|
|
#define ACPI_STA_DEFAULT (ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED | \
|
|
ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING)
|
|
|
|
static void acpi_bus_add_power_resource(acpi_handle handle)
|
|
{
|
|
struct acpi_bus_ops ops = {
|
|
.acpi_op_add = 1,
|
|
.acpi_op_start = 1,
|
|
};
|
|
struct acpi_device *device = NULL;
|
|
|
|
acpi_bus_get_device(handle, &device);
|
|
if (!device)
|
|
acpi_add_single_object(&device, handle, ACPI_BUS_TYPE_POWER,
|
|
ACPI_STA_DEFAULT, &ops);
|
|
}
|
|
|
|
static int acpi_bus_type_and_status(acpi_handle handle, int *type,
|
|
unsigned long long *sta)
|
|
{
|
|
acpi_status status;
|
|
acpi_object_type acpi_type;
|
|
|
|
status = acpi_get_type(handle, &acpi_type);
|
|
if (ACPI_FAILURE(status))
|
|
return -ENODEV;
|
|
|
|
switch (acpi_type) {
|
|
case ACPI_TYPE_ANY: /* for ACPI_ROOT_OBJECT */
|
|
case ACPI_TYPE_DEVICE:
|
|
*type = ACPI_BUS_TYPE_DEVICE;
|
|
status = acpi_bus_get_status_handle(handle, sta);
|
|
if (ACPI_FAILURE(status))
|
|
return -ENODEV;
|
|
break;
|
|
case ACPI_TYPE_PROCESSOR:
|
|
*type = ACPI_BUS_TYPE_PROCESSOR;
|
|
status = acpi_bus_get_status_handle(handle, sta);
|
|
if (ACPI_FAILURE(status))
|
|
return -ENODEV;
|
|
break;
|
|
case ACPI_TYPE_THERMAL:
|
|
*type = ACPI_BUS_TYPE_THERMAL;
|
|
*sta = ACPI_STA_DEFAULT;
|
|
break;
|
|
case ACPI_TYPE_POWER:
|
|
*type = ACPI_BUS_TYPE_POWER;
|
|
*sta = ACPI_STA_DEFAULT;
|
|
break;
|
|
default:
|
|
return -ENODEV;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl,
|
|
void *context, void **return_value)
|
|
{
|
|
struct acpi_bus_ops *ops = context;
|
|
int type;
|
|
unsigned long long sta;
|
|
struct acpi_device *device;
|
|
acpi_status status;
|
|
int result;
|
|
|
|
result = acpi_bus_type_and_status(handle, &type, &sta);
|
|
if (result)
|
|
return AE_OK;
|
|
|
|
if (!(sta & ACPI_STA_DEVICE_PRESENT) &&
|
|
!(sta & ACPI_STA_DEVICE_FUNCTIONING)) {
|
|
struct acpi_device_wakeup wakeup;
|
|
acpi_handle temp;
|
|
|
|
status = acpi_get_handle(handle, "_PRW", &temp);
|
|
if (ACPI_SUCCESS(status))
|
|
acpi_bus_extract_wakeup_device_power_package(handle,
|
|
&wakeup);
|
|
return AE_CTRL_DEPTH;
|
|
}
|
|
|
|
/*
|
|
* We may already have an acpi_device from a previous enumeration. If
|
|
* so, we needn't add it again, but we may still have to start it.
|
|
*/
|
|
device = NULL;
|
|
acpi_bus_get_device(handle, &device);
|
|
if (ops->acpi_op_add && !device)
|
|
acpi_add_single_object(&device, handle, type, sta, ops);
|
|
|
|
if (!device)
|
|
return AE_CTRL_DEPTH;
|
|
|
|
if (ops->acpi_op_start && !(ops->acpi_op_add)) {
|
|
status = acpi_start_single_object(device);
|
|
if (ACPI_FAILURE(status))
|
|
return AE_CTRL_DEPTH;
|
|
}
|
|
|
|
if (!*return_value)
|
|
*return_value = device;
|
|
return AE_OK;
|
|
}
|
|
|
|
static int acpi_bus_scan(acpi_handle handle, struct acpi_bus_ops *ops,
|
|
struct acpi_device **child)
|
|
{
|
|
acpi_status status;
|
|
void *device = NULL;
|
|
|
|
status = acpi_bus_check_add(handle, 0, ops, &device);
|
|
if (ACPI_SUCCESS(status))
|
|
acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX,
|
|
acpi_bus_check_add, NULL, ops, &device);
|
|
|
|
if (child)
|
|
*child = device;
|
|
|
|
if (device)
|
|
return 0;
|
|
else
|
|
return -ENODEV;
|
|
}
|
|
|
|
/*
|
|
* acpi_bus_add and acpi_bus_start
|
|
*
|
|
* scan a given ACPI tree and (probably recently hot-plugged)
|
|
* create and add or starts found devices.
|
|
*
|
|
* If no devices were found -ENODEV is returned which does not
|
|
* mean that this is a real error, there just have been no suitable
|
|
* ACPI objects in the table trunk from which the kernel could create
|
|
* a device and add/start an appropriate driver.
|
|
*/
|
|
|
|
int
|
|
acpi_bus_add(struct acpi_device **child,
|
|
struct acpi_device *parent, acpi_handle handle, int type)
|
|
{
|
|
struct acpi_bus_ops ops;
|
|
|
|
memset(&ops, 0, sizeof(ops));
|
|
ops.acpi_op_add = 1;
|
|
|
|
return acpi_bus_scan(handle, &ops, child);
|
|
}
|
|
EXPORT_SYMBOL(acpi_bus_add);
|
|
|
|
int acpi_bus_start(struct acpi_device *device)
|
|
{
|
|
struct acpi_bus_ops ops;
|
|
int result;
|
|
|
|
if (!device)
|
|
return -EINVAL;
|
|
|
|
memset(&ops, 0, sizeof(ops));
|
|
ops.acpi_op_start = 1;
|
|
|
|
result = acpi_bus_scan(device->handle, &ops, NULL);
|
|
|
|
acpi_update_all_gpes();
|
|
|
|
return result;
|
|
}
|
|
EXPORT_SYMBOL(acpi_bus_start);
|
|
|
|
int acpi_bus_trim(struct acpi_device *start, int rmdevice)
|
|
{
|
|
acpi_status status;
|
|
struct acpi_device *parent, *child;
|
|
acpi_handle phandle, chandle;
|
|
acpi_object_type type;
|
|
u32 level = 1;
|
|
int err = 0;
|
|
|
|
parent = start;
|
|
phandle = start->handle;
|
|
child = chandle = NULL;
|
|
|
|
while ((level > 0) && parent && (!err)) {
|
|
status = acpi_get_next_object(ACPI_TYPE_ANY, phandle,
|
|
chandle, &chandle);
|
|
|
|
/*
|
|
* If this scope is exhausted then move our way back up.
|
|
*/
|
|
if (ACPI_FAILURE(status)) {
|
|
level--;
|
|
chandle = phandle;
|
|
acpi_get_parent(phandle, &phandle);
|
|
child = parent;
|
|
parent = parent->parent;
|
|
|
|
if (level == 0)
|
|
err = acpi_bus_remove(child, rmdevice);
|
|
else
|
|
err = acpi_bus_remove(child, 1);
|
|
|
|
continue;
|
|
}
|
|
|
|
status = acpi_get_type(chandle, &type);
|
|
if (ACPI_FAILURE(status)) {
|
|
continue;
|
|
}
|
|
/*
|
|
* If there is a device corresponding to chandle then
|
|
* parse it (depth-first).
|
|
*/
|
|
if (acpi_bus_get_device(chandle, &child) == 0) {
|
|
level++;
|
|
phandle = chandle;
|
|
chandle = NULL;
|
|
parent = child;
|
|
}
|
|
continue;
|
|
}
|
|
return err;
|
|
}
|
|
EXPORT_SYMBOL_GPL(acpi_bus_trim);
|
|
|
|
static int acpi_bus_scan_fixed(void)
|
|
{
|
|
int result = 0;
|
|
struct acpi_device *device = NULL;
|
|
struct acpi_bus_ops ops;
|
|
|
|
memset(&ops, 0, sizeof(ops));
|
|
ops.acpi_op_add = 1;
|
|
ops.acpi_op_start = 1;
|
|
|
|
/*
|
|
* Enumerate all fixed-feature devices.
|
|
*/
|
|
if ((acpi_gbl_FADT.flags & ACPI_FADT_POWER_BUTTON) == 0) {
|
|
result = acpi_add_single_object(&device, NULL,
|
|
ACPI_BUS_TYPE_POWER_BUTTON,
|
|
ACPI_STA_DEFAULT,
|
|
&ops);
|
|
device_init_wakeup(&device->dev, true);
|
|
}
|
|
|
|
if ((acpi_gbl_FADT.flags & ACPI_FADT_SLEEP_BUTTON) == 0) {
|
|
result = acpi_add_single_object(&device, NULL,
|
|
ACPI_BUS_TYPE_SLEEP_BUTTON,
|
|
ACPI_STA_DEFAULT,
|
|
&ops);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
int __init acpi_scan_init(void)
|
|
{
|
|
int result;
|
|
struct acpi_bus_ops ops;
|
|
|
|
memset(&ops, 0, sizeof(ops));
|
|
ops.acpi_op_add = 1;
|
|
ops.acpi_op_start = 1;
|
|
|
|
result = bus_register(&acpi_bus_type);
|
|
if (result) {
|
|
/* We don't want to quit even if we failed to add suspend/resume */
|
|
printk(KERN_ERR PREFIX "Could not register bus type\n");
|
|
}
|
|
|
|
acpi_power_init();
|
|
|
|
/*
|
|
* Enumerate devices in the ACPI namespace.
|
|
*/
|
|
result = acpi_bus_scan(ACPI_ROOT_OBJECT, &ops, &acpi_root);
|
|
|
|
if (!result)
|
|
result = acpi_bus_scan_fixed();
|
|
|
|
if (result)
|
|
acpi_device_unregister(acpi_root, ACPI_BUS_REMOVAL_NORMAL);
|
|
else
|
|
acpi_update_all_gpes();
|
|
|
|
return result;
|
|
}
|