![Linus Torvalds](/assets/img/avatar_default.png)
- ARM big.LITTLE cpufreq driver from Viresh Kumar.
- exynos5440 cpufreq driver from Amit Daniel Kachhap.
- cpufreq core cleanup and code consolidation from Viresh Kumar and
Stratos Karafotis.
- cpufreq scalability improvement from Nathan Zimmer.
- AMD "frequency sensitivity feedback" powersave bias for the ondemand
cpufreq governor from Jacob Shin.
- cpuidle code consolidation and cleanups from Daniel Lezcano.
- ARM OMAP cpuidle fixes from Santosh Shilimkar and Daniel Lezcano.
- ACPICA fixes and other improvements from Bob Moore, Jung-uk Kim,
Lv Zheng, Yinghai Lu, Tang Chen, Colin Ian King, and Linn Crosetto.
- ACPI core updates related to hotplug from Toshi Kani, Paul Bolle,
Yasuaki Ishimatsu, and Rafael J. Wysocki.
- Intel Lynxpoint LPSS (Low-Power Subsystem) support improvements
from Rafael J. Wysocki and Andy Shevchenko.
/
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Merge tag 'pm+acpi-3.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management and ACPI updates from Rafael J Wysocki:
- ARM big.LITTLE cpufreq driver from Viresh Kumar.
- exynos5440 cpufreq driver from Amit Daniel Kachhap.
- cpufreq core cleanup and code consolidation from Viresh Kumar and
Stratos Karafotis.
- cpufreq scalability improvement from Nathan Zimmer.
- AMD "frequency sensitivity feedback" powersave bias for the ondemand
cpufreq governor from Jacob Shin.
- cpuidle code consolidation and cleanups from Daniel Lezcano.
- ARM OMAP cpuidle fixes from Santosh Shilimkar and Daniel Lezcano.
- ACPICA fixes and other improvements from Bob Moore, Jung-uk Kim, Lv
Zheng, Yinghai Lu, Tang Chen, Colin Ian King, and Linn Crosetto.
- ACPI core updates related to hotplug from Toshi Kani, Paul Bolle,
Yasuaki Ishimatsu, and Rafael J Wysocki.
- Intel Lynxpoint LPSS (Low-Power Subsystem) support improvements from
Rafael J Wysocki and Andy Shevchenko.
* tag 'pm+acpi-3.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (192 commits)
cpufreq: Revert incorrect commit 5800043
cpufreq: MAINTAINERS: Add co-maintainer
cpuidle: add maintainer entry
ACPI / thermal: do not always return THERMAL_TREND_RAISING for active trip points
ARM: s3c64xx: cpuidle: use init/exit common routine
cpufreq: pxa2xx: initialize variables
ACPI: video: correct acpi_video_bus_add error processing
SH: cpuidle: use init/exit common routine
ARM: S5pv210: compiling issue, ARM_S5PV210_CPUFREQ needs CONFIG_CPU_FREQ_TABLE=y
ACPI: Fix wrong parameter passed to memblock_reserve
cpuidle: fix comment format
pnp: use %*phC to dump small buffers
isapnp: remove debug leftovers
ARM: imx: cpuidle: use init/exit common routine
ARM: davinci: cpuidle: use init/exit common routine
ARM: kirkwood: cpuidle: use init/exit common routine
ARM: calxeda: cpuidle: use init/exit common routine
ARM: tegra: cpuidle: use init/exit common routine for tegra3
ARM: tegra: cpuidle: use init/exit common routine for tegra2
ARM: OMAP4: cpuidle: use init/exit common routine
...
2075 lines
53 KiB
C
2075 lines
53 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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static DEFINE_MUTEX(acpi_scan_lock);
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static LIST_HEAD(acpi_scan_handlers_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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void acpi_scan_lock_acquire(void)
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{
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mutex_lock(&acpi_scan_lock);
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}
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EXPORT_SYMBOL_GPL(acpi_scan_lock_acquire);
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void acpi_scan_lock_release(void)
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{
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mutex_unlock(&acpi_scan_lock);
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}
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EXPORT_SYMBOL_GPL(acpi_scan_lock_release);
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int acpi_scan_add_handler(struct acpi_scan_handler *handler)
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{
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if (!handler || !handler->attach)
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return -EINVAL;
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list_add_tail(&handler->list_node, &acpi_scan_handlers_list);
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return 0;
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}
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int acpi_scan_add_handler_with_hotplug(struct acpi_scan_handler *handler,
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const char *hotplug_profile_name)
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{
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int error;
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error = acpi_scan_add_handler(handler);
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if (error)
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return error;
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acpi_sysfs_add_hotplug_profile(&handler->hotplug, hotplug_profile_name);
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return 0;
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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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static int acpi_scan_hot_remove(struct acpi_device *device)
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{
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acpi_handle handle = device->handle;
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acpi_handle not_used;
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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;
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unsigned long long sta;
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/* If there is no handle, the device node has been unregistered. */
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if (!handle) {
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dev_dbg(&device->dev, "ACPI handle missing\n");
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put_device(&device->dev);
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return -EINVAL;
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}
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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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acpi_bus_trim(device);
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/* Device node has been unregistered. */
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put_device(&device->dev);
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device = NULL;
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if (ACPI_SUCCESS(acpi_get_handle(handle, "_LCK", ¬_used))) {
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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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return -ENODEV;
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} else {
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acpi_handle_warn(handle, "Eject failed (0x%x)\n",
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status);
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return -EIO;
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}
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}
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/*
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* Verify if eject was indeed successful. If not, log an error
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* message. No need to call _OST since _EJ0 call was made OK.
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*/
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status = acpi_evaluate_integer(handle, "_STA", NULL, &sta);
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if (ACPI_FAILURE(status)) {
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acpi_handle_warn(handle,
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"Status check after eject failed (0x%x)\n", status);
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} else if (sta & ACPI_STA_DEVICE_ENABLED) {
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acpi_handle_warn(handle,
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"Eject incomplete - status 0x%llx\n", sta);
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}
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return 0;
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}
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static void acpi_bus_device_eject(void *context)
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{
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acpi_handle handle = context;
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struct acpi_device *device = NULL;
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struct acpi_scan_handler *handler;
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u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE;
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mutex_lock(&acpi_scan_lock);
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acpi_bus_get_device(handle, &device);
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if (!device)
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goto err_out;
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handler = device->handler;
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if (!handler || !handler->hotplug.enabled) {
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ost_code = ACPI_OST_SC_EJECT_NOT_SUPPORTED;
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goto err_out;
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}
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acpi_evaluate_hotplug_ost(handle, ACPI_NOTIFY_EJECT_REQUEST,
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ACPI_OST_SC_EJECT_IN_PROGRESS, NULL);
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if (handler->hotplug.mode == AHM_CONTAINER) {
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device->flags.eject_pending = true;
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kobject_uevent(&device->dev.kobj, KOBJ_OFFLINE);
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} else {
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int error;
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get_device(&device->dev);
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error = acpi_scan_hot_remove(device);
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if (error)
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goto err_out;
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}
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out:
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mutex_unlock(&acpi_scan_lock);
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return;
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err_out:
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acpi_evaluate_hotplug_ost(handle, ACPI_NOTIFY_EJECT_REQUEST, ost_code,
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NULL);
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goto out;
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}
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static void acpi_scan_bus_device_check(acpi_handle handle, u32 ost_source)
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{
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struct acpi_device *device = NULL;
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u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE;
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int error;
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mutex_lock(&acpi_scan_lock);
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acpi_bus_get_device(handle, &device);
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if (device) {
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dev_warn(&device->dev, "Attempt to re-insert\n");
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goto out;
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}
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acpi_evaluate_hotplug_ost(handle, ost_source,
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ACPI_OST_SC_INSERT_IN_PROGRESS, NULL);
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error = acpi_bus_scan(handle);
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if (error) {
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acpi_handle_warn(handle, "Namespace scan failure\n");
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goto out;
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}
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error = acpi_bus_get_device(handle, &device);
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if (error) {
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acpi_handle_warn(handle, "Missing device node object\n");
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goto out;
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}
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ost_code = ACPI_OST_SC_SUCCESS;
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if (device->handler && device->handler->hotplug.mode == AHM_CONTAINER)
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kobject_uevent(&device->dev.kobj, KOBJ_ONLINE);
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out:
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acpi_evaluate_hotplug_ost(handle, ost_source, ost_code, NULL);
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mutex_unlock(&acpi_scan_lock);
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}
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static void acpi_scan_bus_check(void *context)
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{
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acpi_scan_bus_device_check((acpi_handle)context,
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ACPI_NOTIFY_BUS_CHECK);
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}
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static void acpi_scan_device_check(void *context)
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{
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acpi_scan_bus_device_check((acpi_handle)context,
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ACPI_NOTIFY_DEVICE_CHECK);
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}
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static void acpi_hotplug_unsupported(acpi_handle handle, u32 type)
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{
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u32 ost_status;
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switch (type) {
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case ACPI_NOTIFY_BUS_CHECK:
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acpi_handle_debug(handle,
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"ACPI_NOTIFY_BUS_CHECK event: unsupported\n");
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ost_status = ACPI_OST_SC_INSERT_NOT_SUPPORTED;
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break;
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case ACPI_NOTIFY_DEVICE_CHECK:
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acpi_handle_debug(handle,
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"ACPI_NOTIFY_DEVICE_CHECK event: unsupported\n");
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ost_status = ACPI_OST_SC_INSERT_NOT_SUPPORTED;
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break;
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case ACPI_NOTIFY_EJECT_REQUEST:
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acpi_handle_debug(handle,
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"ACPI_NOTIFY_EJECT_REQUEST event: unsupported\n");
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ost_status = ACPI_OST_SC_EJECT_NOT_SUPPORTED;
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break;
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default:
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/* non-hotplug event; possibly handled by other handler */
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return;
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}
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acpi_evaluate_hotplug_ost(handle, type, ost_status, NULL);
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}
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static void acpi_hotplug_notify_cb(acpi_handle handle, u32 type, void *data)
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{
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acpi_osd_exec_callback callback;
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struct acpi_scan_handler *handler = data;
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acpi_status status;
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if (!handler->hotplug.enabled)
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return acpi_hotplug_unsupported(handle, type);
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switch (type) {
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case ACPI_NOTIFY_BUS_CHECK:
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acpi_handle_debug(handle, "ACPI_NOTIFY_BUS_CHECK event\n");
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callback = acpi_scan_bus_check;
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break;
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case ACPI_NOTIFY_DEVICE_CHECK:
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acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_CHECK event\n");
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callback = acpi_scan_device_check;
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break;
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case ACPI_NOTIFY_EJECT_REQUEST:
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acpi_handle_debug(handle, "ACPI_NOTIFY_EJECT_REQUEST event\n");
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callback = acpi_bus_device_eject;
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break;
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default:
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/* non-hotplug event; possibly handled by other handler */
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return;
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}
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status = acpi_os_hotplug_execute(callback, handle);
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if (ACPI_FAILURE(status))
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acpi_evaluate_hotplug_ost(handle, type,
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ACPI_OST_SC_NON_SPECIFIC_FAILURE,
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NULL);
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}
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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 = context;
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struct acpi_device *device = ej_event->device;
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acpi_handle handle = device->handle;
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int error;
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mutex_lock(&acpi_scan_lock);
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error = acpi_scan_hot_remove(device);
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if (error && handle)
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acpi_evaluate_hotplug_ost(handle, ej_event->event,
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ACPI_OST_SC_NON_SPECIFIC_FAILURE,
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NULL);
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mutex_unlock(&acpi_scan_lock);
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kfree(context);
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}
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EXPORT_SYMBOL(acpi_bus_hot_remove_device);
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|
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static ssize_t real_power_state_show(struct device *dev,
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struct device_attribute *attr, char *buf)
|
|
{
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struct acpi_device *adev = to_acpi_device(dev);
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int state;
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int ret;
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|
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ret = acpi_device_get_power(adev, &state);
|
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if (ret)
|
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return ret;
|
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|
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return sprintf(buf, "%s\n", acpi_power_state_string(state));
|
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}
|
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|
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static DEVICE_ATTR(real_power_state, 0444, real_power_state_show, NULL);
|
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|
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static ssize_t power_state_show(struct device *dev,
|
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struct device_attribute *attr, char *buf)
|
|
{
|
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struct acpi_device *adev = to_acpi_device(dev);
|
|
|
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return sprintf(buf, "%s\n", acpi_power_state_string(adev->power.state));
|
|
}
|
|
|
|
static DEVICE_ATTR(power_state, 0444, power_state_show, NULL);
|
|
|
|
static ssize_t
|
|
acpi_eject_store(struct device *d, struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct acpi_device *acpi_device = to_acpi_device(d);
|
|
struct acpi_eject_event *ej_event;
|
|
acpi_object_type not_used;
|
|
acpi_status status;
|
|
u32 ost_source;
|
|
int ret;
|
|
|
|
if (!count || buf[0] != '1')
|
|
return -EINVAL;
|
|
|
|
if ((!acpi_device->handler || !acpi_device->handler->hotplug.enabled)
|
|
&& !acpi_device->driver)
|
|
return -ENODEV;
|
|
|
|
status = acpi_get_type(acpi_device->handle, ¬_used);
|
|
if (ACPI_FAILURE(status) || !acpi_device->flags.ejectable)
|
|
return -ENODEV;
|
|
|
|
mutex_lock(&acpi_scan_lock);
|
|
|
|
if (acpi_device->flags.eject_pending) {
|
|
/* ACPI eject notification event. */
|
|
ost_source = ACPI_NOTIFY_EJECT_REQUEST;
|
|
acpi_device->flags.eject_pending = 0;
|
|
} else {
|
|
/* Eject initiated by user space. */
|
|
ost_source = ACPI_OST_EC_OSPM_EJECT;
|
|
}
|
|
ej_event = kmalloc(sizeof(*ej_event), GFP_KERNEL);
|
|
if (!ej_event) {
|
|
ret = -ENOMEM;
|
|
goto err_out;
|
|
}
|
|
acpi_evaluate_hotplug_ost(acpi_device->handle, ost_source,
|
|
ACPI_OST_SC_EJECT_IN_PROGRESS, NULL);
|
|
ej_event->device = acpi_device;
|
|
ej_event->event = ost_source;
|
|
get_device(&acpi_device->dev);
|
|
status = acpi_os_hotplug_execute(acpi_bus_hot_remove_device, ej_event);
|
|
if (ACPI_FAILURE(status)) {
|
|
put_device(&acpi_device->dev);
|
|
kfree(ej_event);
|
|
ret = status == AE_NO_MEMORY ? -ENOMEM : -EAGAIN;
|
|
goto err_out;
|
|
}
|
|
ret = count;
|
|
|
|
out:
|
|
mutex_unlock(&acpi_scan_lock);
|
|
return ret;
|
|
|
|
err_out:
|
|
acpi_evaluate_hotplug_ost(acpi_device->handle, ost_source,
|
|
ACPI_OST_SC_NON_SPECIFIC_FAILURE, NULL);
|
|
goto out;
|
|
}
|
|
|
|
static DEVICE_ATTR(eject, 0200, NULL, acpi_eject_store);
|
|
|
|
static ssize_t
|
|
acpi_device_hid_show(struct device *dev, struct device_attribute *attr, char *buf) {
|
|
struct acpi_device *acpi_dev = to_acpi_device(dev);
|
|
|
|
return sprintf(buf, "%s\n", acpi_device_hid(acpi_dev));
|
|
}
|
|
static DEVICE_ATTR(hid, 0444, acpi_device_hid_show, NULL);
|
|
|
|
static ssize_t acpi_device_uid_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct acpi_device *acpi_dev = to_acpi_device(dev);
|
|
|
|
return sprintf(buf, "%s\n", acpi_dev->pnp.unique_id);
|
|
}
|
|
static DEVICE_ATTR(uid, 0444, acpi_device_uid_show, NULL);
|
|
|
|
static ssize_t acpi_device_adr_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct acpi_device *acpi_dev = to_acpi_device(dev);
|
|
|
|
return sprintf(buf, "0x%08x\n",
|
|
(unsigned int)(acpi_dev->pnp.bus_address));
|
|
}
|
|
static DEVICE_ATTR(adr, 0444, acpi_device_adr_show, NULL);
|
|
|
|
static ssize_t
|
|
acpi_device_path_show(struct device *dev, struct device_attribute *attr, char *buf) {
|
|
struct acpi_device *acpi_dev = to_acpi_device(dev);
|
|
struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL};
|
|
int result;
|
|
|
|
result = acpi_get_name(acpi_dev->handle, ACPI_FULL_PATHNAME, &path);
|
|
if (result)
|
|
goto end;
|
|
|
|
result = sprintf(buf, "%s\n", (char*)path.pointer);
|
|
kfree(path.pointer);
|
|
end:
|
|
return result;
|
|
}
|
|
static DEVICE_ATTR(path, 0444, acpi_device_path_show, NULL);
|
|
|
|
/* sysfs file that shows description text from the ACPI _STR method */
|
|
static ssize_t description_show(struct device *dev,
|
|
struct device_attribute *attr,
|
|
char *buf) {
|
|
struct acpi_device *acpi_dev = to_acpi_device(dev);
|
|
int result;
|
|
|
|
if (acpi_dev->pnp.str_obj == NULL)
|
|
return 0;
|
|
|
|
/*
|
|
* The _STR object contains a Unicode identifier for a device.
|
|
* We need to convert to utf-8 so it can be displayed.
|
|
*/
|
|
result = utf16s_to_utf8s(
|
|
(wchar_t *)acpi_dev->pnp.str_obj->buffer.pointer,
|
|
acpi_dev->pnp.str_obj->buffer.length,
|
|
UTF16_LITTLE_ENDIAN, buf,
|
|
PAGE_SIZE);
|
|
|
|
buf[result++] = '\n';
|
|
|
|
return result;
|
|
}
|
|
static DEVICE_ATTR(description, 0444, description_show, NULL);
|
|
|
|
static ssize_t
|
|
acpi_device_sun_show(struct device *dev, struct device_attribute *attr,
|
|
char *buf) {
|
|
struct acpi_device *acpi_dev = to_acpi_device(dev);
|
|
|
|
return sprintf(buf, "%lu\n", acpi_dev->pnp.sun);
|
|
}
|
|
static DEVICE_ATTR(sun, 0444, acpi_device_sun_show, NULL);
|
|
|
|
static int acpi_device_setup_files(struct acpi_device *dev)
|
|
{
|
|
struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
|
|
acpi_status status;
|
|
acpi_handle temp;
|
|
unsigned long long sun;
|
|
int result = 0;
|
|
|
|
/*
|
|
* Devices gotten from FADT don't have a "path" attribute
|
|
*/
|
|
if (dev->handle) {
|
|
result = device_create_file(&dev->dev, &dev_attr_path);
|
|
if (result)
|
|
goto end;
|
|
}
|
|
|
|
if (!list_empty(&dev->pnp.ids)) {
|
|
result = device_create_file(&dev->dev, &dev_attr_hid);
|
|
if (result)
|
|
goto end;
|
|
|
|
result = device_create_file(&dev->dev, &dev_attr_modalias);
|
|
if (result)
|
|
goto end;
|
|
}
|
|
|
|
/*
|
|
* If device has _STR, 'description' file is created
|
|
*/
|
|
status = acpi_get_handle(dev->handle, "_STR", &temp);
|
|
if (ACPI_SUCCESS(status)) {
|
|
status = acpi_evaluate_object(dev->handle, "_STR",
|
|
NULL, &buffer);
|
|
if (ACPI_FAILURE(status))
|
|
buffer.pointer = NULL;
|
|
dev->pnp.str_obj = buffer.pointer;
|
|
result = device_create_file(&dev->dev, &dev_attr_description);
|
|
if (result)
|
|
goto end;
|
|
}
|
|
|
|
if (dev->pnp.type.bus_address)
|
|
result = device_create_file(&dev->dev, &dev_attr_adr);
|
|
if (dev->pnp.unique_id)
|
|
result = device_create_file(&dev->dev, &dev_attr_uid);
|
|
|
|
status = acpi_evaluate_integer(dev->handle, "_SUN", NULL, &sun);
|
|
if (ACPI_SUCCESS(status)) {
|
|
dev->pnp.sun = (unsigned long)sun;
|
|
result = device_create_file(&dev->dev, &dev_attr_sun);
|
|
if (result)
|
|
goto end;
|
|
} else {
|
|
dev->pnp.sun = (unsigned long)-1;
|
|
}
|
|
|
|
/*
|
|
* If device has _EJ0, 'eject' file is created that is used to trigger
|
|
* hot-removal function from userland.
|
|
*/
|
|
status = acpi_get_handle(dev->handle, "_EJ0", &temp);
|
|
if (ACPI_SUCCESS(status)) {
|
|
result = device_create_file(&dev->dev, &dev_attr_eject);
|
|
if (result)
|
|
return result;
|
|
}
|
|
|
|
if (dev->flags.power_manageable) {
|
|
result = device_create_file(&dev->dev, &dev_attr_power_state);
|
|
if (result)
|
|
return result;
|
|
|
|
if (dev->power.flags.power_resources)
|
|
result = device_create_file(&dev->dev,
|
|
&dev_attr_real_power_state);
|
|
}
|
|
|
|
end:
|
|
return result;
|
|
}
|
|
|
|
static void acpi_device_remove_files(struct acpi_device *dev)
|
|
{
|
|
acpi_status status;
|
|
acpi_handle temp;
|
|
|
|
if (dev->flags.power_manageable) {
|
|
device_remove_file(&dev->dev, &dev_attr_power_state);
|
|
if (dev->power.flags.power_resources)
|
|
device_remove_file(&dev->dev,
|
|
&dev_attr_real_power_state);
|
|
}
|
|
|
|
/*
|
|
* If device has _STR, remove 'description' file
|
|
*/
|
|
status = acpi_get_handle(dev->handle, "_STR", &temp);
|
|
if (ACPI_SUCCESS(status)) {
|
|
kfree(dev->pnp.str_obj);
|
|
device_remove_file(&dev->dev, &dev_attr_description);
|
|
}
|
|
/*
|
|
* If device has _EJ0, remove 'eject' file.
|
|
*/
|
|
status = acpi_get_handle(dev->handle, "_EJ0", &temp);
|
|
if (ACPI_SUCCESS(status))
|
|
device_remove_file(&dev->dev, &dev_attr_eject);
|
|
|
|
status = acpi_get_handle(dev->handle, "_SUN", &temp);
|
|
if (ACPI_SUCCESS(status))
|
|
device_remove_file(&dev->dev, &dev_attr_sun);
|
|
|
|
if (dev->pnp.unique_id)
|
|
device_remove_file(&dev->dev, &dev_attr_uid);
|
|
if (dev->pnp.type.bus_address)
|
|
device_remove_file(&dev->dev, &dev_attr_adr);
|
|
device_remove_file(&dev->dev, &dev_attr_modalias);
|
|
device_remove_file(&dev->dev, &dev_attr_hid);
|
|
if (dev->handle)
|
|
device_remove_file(&dev->dev, &dev_attr_path);
|
|
}
|
|
/* --------------------------------------------------------------------------
|
|
ACPI Bus operations
|
|
-------------------------------------------------------------------------- */
|
|
|
|
static const struct acpi_device_id *__acpi_match_device(
|
|
struct acpi_device *device, const struct acpi_device_id *ids)
|
|
{
|
|
const struct acpi_device_id *id;
|
|
struct acpi_hardware_id *hwid;
|
|
|
|
/*
|
|
* If the device is not present, it is unnecessary to load device
|
|
* driver for it.
|
|
*/
|
|
if (!device->status.present)
|
|
return NULL;
|
|
|
|
for (id = ids; id->id[0]; id++)
|
|
list_for_each_entry(hwid, &device->pnp.ids, list)
|
|
if (!strcmp((char *) id->id, hwid->id))
|
|
return id;
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
* acpi_match_device - Match a struct device against a given list of ACPI IDs
|
|
* @ids: Array of struct acpi_device_id object to match against.
|
|
* @dev: The device structure to match.
|
|
*
|
|
* Check if @dev has a valid ACPI handle and if there is a struct acpi_device
|
|
* object for that handle and use that object to match against a given list of
|
|
* device IDs.
|
|
*
|
|
* Return a pointer to the first matching ID on success or %NULL on failure.
|
|
*/
|
|
const struct acpi_device_id *acpi_match_device(const struct acpi_device_id *ids,
|
|
const struct device *dev)
|
|
{
|
|
struct acpi_device *adev;
|
|
acpi_handle handle = ACPI_HANDLE(dev);
|
|
|
|
if (!ids || !handle || acpi_bus_get_device(handle, &adev))
|
|
return NULL;
|
|
|
|
return __acpi_match_device(adev, ids);
|
|
}
|
|
EXPORT_SYMBOL_GPL(acpi_match_device);
|
|
|
|
int acpi_match_device_ids(struct acpi_device *device,
|
|
const struct acpi_device_id *ids)
|
|
{
|
|
return __acpi_match_device(device, ids) ? 0 : -ENOENT;
|
|
}
|
|
EXPORT_SYMBOL(acpi_match_device_ids);
|
|
|
|
static void acpi_free_power_resources_lists(struct acpi_device *device)
|
|
{
|
|
int i;
|
|
|
|
if (device->wakeup.flags.valid)
|
|
acpi_power_resources_list_free(&device->wakeup.resources);
|
|
|
|
if (!device->flags.power_manageable)
|
|
return;
|
|
|
|
for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++) {
|
|
struct acpi_device_power_state *ps = &device->power.states[i];
|
|
acpi_power_resources_list_free(&ps->resources);
|
|
}
|
|
}
|
|
|
|
static void acpi_device_release(struct device *dev)
|
|
{
|
|
struct acpi_device *acpi_dev = to_acpi_device(dev);
|
|
|
|
acpi_free_pnp_ids(&acpi_dev->pnp);
|
|
acpi_free_power_resources_lists(acpi_dev);
|
|
kfree(acpi_dev);
|
|
}
|
|
|
|
static int acpi_bus_match(struct device *dev, struct device_driver *drv)
|
|
{
|
|
struct acpi_device *acpi_dev = to_acpi_device(dev);
|
|
struct acpi_driver *acpi_drv = to_acpi_driver(drv);
|
|
|
|
return acpi_dev->flags.match_driver
|
|
&& !acpi_match_device_ids(acpi_dev, acpi_drv->ids);
|
|
}
|
|
|
|
static int acpi_device_uevent(struct device *dev, struct kobj_uevent_env *env)
|
|
{
|
|
struct acpi_device *acpi_dev = to_acpi_device(dev);
|
|
int len;
|
|
|
|
if (list_empty(&acpi_dev->pnp.ids))
|
|
return 0;
|
|
|
|
if (add_uevent_var(env, "MODALIAS="))
|
|
return -ENOMEM;
|
|
len = create_modalias(acpi_dev, &env->buf[env->buflen - 1],
|
|
sizeof(env->buf) - env->buflen);
|
|
if (len >= (sizeof(env->buf) - env->buflen))
|
|
return -ENOMEM;
|
|
env->buflen += len;
|
|
return 0;
|
|
}
|
|
|
|
static void acpi_device_notify(acpi_handle handle, u32 event, void *data)
|
|
{
|
|
struct acpi_device *device = data;
|
|
|
|
device->driver->ops.notify(device, event);
|
|
}
|
|
|
|
static acpi_status acpi_device_notify_fixed(void *data)
|
|
{
|
|
struct acpi_device *device = data;
|
|
|
|
/* Fixed hardware devices have no handles */
|
|
acpi_device_notify(NULL, ACPI_FIXED_HARDWARE_EVENT, device);
|
|
return AE_OK;
|
|
}
|
|
|
|
static int acpi_device_install_notify_handler(struct acpi_device *device)
|
|
{
|
|
acpi_status status;
|
|
|
|
if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON)
|
|
status =
|
|
acpi_install_fixed_event_handler(ACPI_EVENT_POWER_BUTTON,
|
|
acpi_device_notify_fixed,
|
|
device);
|
|
else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON)
|
|
status =
|
|
acpi_install_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON,
|
|
acpi_device_notify_fixed,
|
|
device);
|
|
else
|
|
status = acpi_install_notify_handler(device->handle,
|
|
ACPI_DEVICE_NOTIFY,
|
|
acpi_device_notify,
|
|
device);
|
|
|
|
if (ACPI_FAILURE(status))
|
|
return -EINVAL;
|
|
return 0;
|
|
}
|
|
|
|
static void acpi_device_remove_notify_handler(struct acpi_device *device)
|
|
{
|
|
if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON)
|
|
acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON,
|
|
acpi_device_notify_fixed);
|
|
else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON)
|
|
acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON,
|
|
acpi_device_notify_fixed);
|
|
else
|
|
acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY,
|
|
acpi_device_notify);
|
|
}
|
|
|
|
static int acpi_bus_driver_init(struct acpi_device *, struct acpi_driver *);
|
|
static int acpi_device_probe(struct device * dev)
|
|
{
|
|
struct acpi_device *acpi_dev = to_acpi_device(dev);
|
|
struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver);
|
|
int ret;
|
|
|
|
ret = acpi_bus_driver_init(acpi_dev, acpi_drv);
|
|
if (!ret) {
|
|
if (acpi_drv->ops.notify) {
|
|
ret = acpi_device_install_notify_handler(acpi_dev);
|
|
if (ret) {
|
|
if (acpi_drv->ops.remove)
|
|
acpi_drv->ops.remove(acpi_dev);
|
|
acpi_dev->driver = NULL;
|
|
acpi_dev->driver_data = NULL;
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
|
"Found driver [%s] for device [%s]\n",
|
|
acpi_drv->name, acpi_dev->pnp.bus_id));
|
|
get_device(dev);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static int acpi_device_remove(struct device * dev)
|
|
{
|
|
struct acpi_device *acpi_dev = to_acpi_device(dev);
|
|
struct acpi_driver *acpi_drv = acpi_dev->driver;
|
|
|
|
if (acpi_drv) {
|
|
if (acpi_drv->ops.notify)
|
|
acpi_device_remove_notify_handler(acpi_dev);
|
|
if (acpi_drv->ops.remove)
|
|
acpi_drv->ops.remove(acpi_dev);
|
|
}
|
|
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,
|
|
};
|
|
|
|
int acpi_device_add(struct acpi_device *device,
|
|
void (*release)(struct device *))
|
|
{
|
|
int result;
|
|
struct acpi_device_bus_id *acpi_device_bus_id, *new_bus_id;
|
|
int found = 0;
|
|
|
|
if (device->handle) {
|
|
acpi_status status;
|
|
|
|
status = acpi_attach_data(device->handle, acpi_bus_data_handler,
|
|
device);
|
|
if (ACPI_FAILURE(status)) {
|
|
acpi_handle_err(device->handle,
|
|
"Unable to attach device data\n");
|
|
return -ENODEV;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* 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);
|
|
INIT_LIST_HEAD(&device->power_dependent);
|
|
|
|
new_bus_id = kzalloc(sizeof(struct acpi_device_bus_id), GFP_KERNEL);
|
|
if (!new_bus_id) {
|
|
pr_err(PREFIX "Memory allocation error\n");
|
|
result = -ENOMEM;
|
|
goto err_detach;
|
|
}
|
|
|
|
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 = release;
|
|
result = device_add(&device->dev);
|
|
if (result) {
|
|
dev_err(&device->dev, "Error registering device\n");
|
|
goto err;
|
|
}
|
|
|
|
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;
|
|
|
|
err:
|
|
mutex_lock(&acpi_device_lock);
|
|
if (device->parent)
|
|
list_del(&device->node);
|
|
list_del(&device->wakeup_list);
|
|
mutex_unlock(&acpi_device_lock);
|
|
|
|
err_detach:
|
|
acpi_detach_data(device->handle, acpi_bus_data_handler);
|
|
return result;
|
|
}
|
|
|
|
static void acpi_device_unregister(struct acpi_device *device)
|
|
{
|
|
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_power_add_remove_device(device, false);
|
|
acpi_device_remove_files(device);
|
|
if (device->remove)
|
|
device->remove(device);
|
|
|
|
device_del(&device->dev);
|
|
/*
|
|
* Transition the device to D3cold to drop the reference counts of all
|
|
* power resources the device depends on and turn off the ones that have
|
|
* no more references.
|
|
*/
|
|
acpi_device_set_power(device, ACPI_STATE_D3_COLD);
|
|
device->handle = NULL;
|
|
put_device(&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;
|
|
}
|
|
|
|
/**
|
|
* 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)
|
|
{
|
|
struct acpi_device *device = NULL;
|
|
acpi_status status;
|
|
|
|
/*
|
|
* 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)
|
|
return acpi_root;
|
|
|
|
do {
|
|
status = acpi_get_parent(handle, &handle);
|
|
if (ACPI_FAILURE(status))
|
|
return status == AE_NULL_ENTRY ? NULL : acpi_root;
|
|
} while (acpi_bus_get_device(handle, &device));
|
|
return device;
|
|
}
|
|
|
|
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_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 err = -ENODATA;
|
|
|
|
if (!wakeup)
|
|
return -EINVAL;
|
|
|
|
INIT_LIST_HEAD(&wakeup->resources);
|
|
|
|
/* _PRW */
|
|
status = acpi_evaluate_object(handle, "_PRW", NULL, &buffer);
|
|
if (ACPI_FAILURE(status)) {
|
|
ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRW"));
|
|
return err;
|
|
}
|
|
|
|
package = (union acpi_object *)buffer.pointer;
|
|
|
|
if (!package || package->package.count < 2)
|
|
goto out;
|
|
|
|
element = &(package->package.elements[0]);
|
|
if (!element)
|
|
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))
|
|
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 {
|
|
goto out;
|
|
}
|
|
|
|
element = &(package->package.elements[1]);
|
|
if (element->type != ACPI_TYPE_INTEGER)
|
|
goto out;
|
|
|
|
wakeup->sleep_state = element->integer.value;
|
|
|
|
err = acpi_extract_power_resources(package, 2, &wakeup->resources);
|
|
if (err)
|
|
goto out;
|
|
|
|
if (!list_empty(&wakeup->resources)) {
|
|
int sleep_state;
|
|
|
|
err = acpi_power_wakeup_list_init(&wakeup->resources,
|
|
&sleep_state);
|
|
if (err) {
|
|
acpi_handle_warn(handle, "Retrieving current states "
|
|
"of wakeup power resources failed\n");
|
|
acpi_power_resources_list_free(&wakeup->resources);
|
|
goto out;
|
|
}
|
|
if (sleep_state < wakeup->sleep_state) {
|
|
acpi_handle_warn(handle, "Overriding _PRW sleep state "
|
|
"(S%d) by S%d from power resources\n",
|
|
(int)wakeup->sleep_state, sleep_state);
|
|
wakeup->sleep_state = sleep_state;
|
|
}
|
|
}
|
|
acpi_setup_gpe_for_wake(handle, wakeup->gpe_device, wakeup->gpe_number);
|
|
|
|
out:
|
|
kfree(buffer.pointer);
|
|
return err;
|
|
}
|
|
|
|
static void acpi_bus_set_run_wake_flags(struct acpi_device *device)
|
|
{
|
|
struct acpi_device_id button_device_ids[] = {
|
|
{"PNP0C0C", 0},
|
|
{"PNP0C0D", 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;
|
|
if (!acpi_match_device_ids(device, &button_device_ids[1])) {
|
|
/* Do not use Lid/sleep button for S5 wakeup */
|
|
if (device->wakeup.sleep_state == ACPI_STATE_S5)
|
|
device->wakeup.sleep_state = ACPI_STATE_S4;
|
|
}
|
|
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 err;
|
|
|
|
/* Presence of _PRW indicates wake capable */
|
|
status = acpi_get_handle(device->handle, "_PRW", &temp);
|
|
if (ACPI_FAILURE(status))
|
|
return;
|
|
|
|
err = acpi_bus_extract_wakeup_device_power_package(device->handle,
|
|
&device->wakeup);
|
|
if (err) {
|
|
dev_err(&device->dev, "_PRW evaluation error: %d\n", err);
|
|
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.
|
|
*/
|
|
err = acpi_device_sleep_wake(device, 0, 0, 0);
|
|
if (err)
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
|
"error in _DSW or _PSW evaluation\n"));
|
|
}
|
|
|
|
static void acpi_bus_init_power_state(struct acpi_device *device, int state)
|
|
{
|
|
struct acpi_device_power_state *ps = &device->power.states[state];
|
|
char pathname[5] = { '_', 'P', 'R', '0' + state, '\0' };
|
|
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
|
|
acpi_handle handle;
|
|
acpi_status status;
|
|
|
|
INIT_LIST_HEAD(&ps->resources);
|
|
|
|
/* Evaluate "_PRx" to get referenced power resources */
|
|
status = acpi_evaluate_object(device->handle, pathname, NULL, &buffer);
|
|
if (ACPI_SUCCESS(status)) {
|
|
union acpi_object *package = buffer.pointer;
|
|
|
|
if (buffer.length && package
|
|
&& package->type == ACPI_TYPE_PACKAGE
|
|
&& package->package.count) {
|
|
int err = acpi_extract_power_resources(package, 0,
|
|
&ps->resources);
|
|
if (!err)
|
|
device->power.flags.power_resources = 1;
|
|
}
|
|
ACPI_FREE(buffer.pointer);
|
|
}
|
|
|
|
/* Evaluate "_PSx" to see if we can do explicit sets */
|
|
pathname[2] = 'S';
|
|
status = acpi_get_handle(device->handle, pathname, &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 (!list_empty(&ps->resources)
|
|
|| (ps->flags.explicit_set && state < ACPI_STATE_D3_HOT)) {
|
|
ps->flags.valid = 1;
|
|
ps->flags.os_accessible = 1;
|
|
}
|
|
|
|
ps->power = -1; /* Unknown - driver assigned */
|
|
ps->latency = -1; /* Unknown - driver assigned */
|
|
}
|
|
|
|
static void acpi_bus_get_power_flags(struct acpi_device *device)
|
|
{
|
|
acpi_status status;
|
|
acpi_handle handle;
|
|
u32 i;
|
|
|
|
/* Presence of _PS0|_PR0 indicates 'power manageable' */
|
|
status = acpi_get_handle(device->handle, "_PS0", &handle);
|
|
if (ACPI_FAILURE(status)) {
|
|
status = acpi_get_handle(device->handle, "_PR0", &handle);
|
|
if (ACPI_FAILURE(status))
|
|
return;
|
|
}
|
|
|
|
device->flags.power_manageable = 1;
|
|
|
|
/*
|
|
* 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++)
|
|
acpi_bus_init_power_state(device, i);
|
|
|
|
INIT_LIST_HEAD(&device->power.states[ACPI_STATE_D3_COLD].resources);
|
|
|
|
/* 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;
|
|
|
|
/* Presence of _PS3 or _PRx means we can put the device into D3 cold */
|
|
if (device->power.states[ACPI_STATE_D3_HOT].flags.explicit_set ||
|
|
device->power.flags.power_resources)
|
|
device->power.states[ACPI_STATE_D3_COLD].flags.os_accessible = 1;
|
|
|
|
if (acpi_bus_init_power(device)) {
|
|
acpi_free_power_resources_lists(device);
|
|
device->flags.power_manageable = 0;
|
|
}
|
|
}
|
|
|
|
static void 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;
|
|
}
|
|
}
|
|
|
|
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 an acpi object 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(acpi_handle handle)
|
|
{
|
|
acpi_status status;
|
|
acpi_handle tmp;
|
|
acpi_handle phandle;
|
|
|
|
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 an acpi object has a _DCK method
|
|
*/
|
|
static int acpi_dock_match(acpi_handle handle)
|
|
{
|
|
acpi_handle tmp;
|
|
return acpi_get_handle(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_pnp *pnp, 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, &pnp->ids);
|
|
pnp->type.hardware_id = 1;
|
|
}
|
|
|
|
/*
|
|
* 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(acpi_handle handle)
|
|
{
|
|
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(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(handle, "SBI", &h_dummy)) &&
|
|
ACPI_SUCCESS(acpi_get_handle(handle, "SBR", &h_dummy)) &&
|
|
ACPI_SUCCESS(acpi_get_handle(handle, "SBW", &h_dummy)))
|
|
result = 0;
|
|
out:
|
|
kfree(path.pointer);
|
|
return result;
|
|
}
|
|
|
|
static void acpi_set_pnp_ids(acpi_handle handle, struct acpi_device_pnp *pnp,
|
|
int device_type)
|
|
{
|
|
acpi_status status;
|
|
struct acpi_device_info *info;
|
|
struct acpi_pnp_device_id_list *cid_list;
|
|
int i;
|
|
|
|
switch (device_type) {
|
|
case ACPI_BUS_TYPE_DEVICE:
|
|
if (handle == ACPI_ROOT_OBJECT) {
|
|
acpi_add_id(pnp, ACPI_SYSTEM_HID);
|
|
break;
|
|
}
|
|
|
|
status = acpi_get_object_info(handle, &info);
|
|
if (ACPI_FAILURE(status)) {
|
|
pr_err(PREFIX "%s: Error reading device info\n",
|
|
__func__);
|
|
return;
|
|
}
|
|
|
|
if (info->valid & ACPI_VALID_HID)
|
|
acpi_add_id(pnp, 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(pnp, cid_list->ids[i].string);
|
|
}
|
|
if (info->valid & ACPI_VALID_ADR) {
|
|
pnp->bus_address = info->address;
|
|
pnp->type.bus_address = 1;
|
|
}
|
|
if (info->valid & ACPI_VALID_UID)
|
|
pnp->unique_id = kstrdup(info->unique_id.string,
|
|
GFP_KERNEL);
|
|
|
|
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(handle))
|
|
acpi_add_id(pnp, ACPI_VIDEO_HID);
|
|
else if (ACPI_SUCCESS(acpi_bay_match(handle)))
|
|
acpi_add_id(pnp, ACPI_BAY_HID);
|
|
else if (ACPI_SUCCESS(acpi_dock_match(handle)))
|
|
acpi_add_id(pnp, ACPI_DOCK_HID);
|
|
else if (!acpi_ibm_smbus_match(handle))
|
|
acpi_add_id(pnp, ACPI_SMBUS_IBM_HID);
|
|
else if (list_empty(&pnp->ids) && handle == ACPI_ROOT_OBJECT) {
|
|
acpi_add_id(pnp, ACPI_BUS_HID); /* \_SB, LNXSYBUS */
|
|
strcpy(pnp->device_name, ACPI_BUS_DEVICE_NAME);
|
|
strcpy(pnp->device_class, ACPI_BUS_CLASS);
|
|
}
|
|
|
|
break;
|
|
case ACPI_BUS_TYPE_POWER:
|
|
acpi_add_id(pnp, ACPI_POWER_HID);
|
|
break;
|
|
case ACPI_BUS_TYPE_PROCESSOR:
|
|
acpi_add_id(pnp, ACPI_PROCESSOR_OBJECT_HID);
|
|
break;
|
|
case ACPI_BUS_TYPE_THERMAL:
|
|
acpi_add_id(pnp, ACPI_THERMAL_HID);
|
|
break;
|
|
case ACPI_BUS_TYPE_POWER_BUTTON:
|
|
acpi_add_id(pnp, ACPI_BUTTON_HID_POWERF);
|
|
break;
|
|
case ACPI_BUS_TYPE_SLEEP_BUTTON:
|
|
acpi_add_id(pnp, ACPI_BUTTON_HID_SLEEPF);
|
|
break;
|
|
}
|
|
}
|
|
|
|
void acpi_free_pnp_ids(struct acpi_device_pnp *pnp)
|
|
{
|
|
struct acpi_hardware_id *id, *tmp;
|
|
|
|
list_for_each_entry_safe(id, tmp, &pnp->ids, list) {
|
|
kfree(id->id);
|
|
kfree(id);
|
|
}
|
|
kfree(pnp->unique_id);
|
|
}
|
|
|
|
void acpi_init_device_object(struct acpi_device *device, acpi_handle handle,
|
|
int type, unsigned long long sta)
|
|
{
|
|
INIT_LIST_HEAD(&device->pnp.ids);
|
|
device->device_type = type;
|
|
device->handle = handle;
|
|
device->parent = acpi_bus_get_parent(handle);
|
|
STRUCT_TO_INT(device->status) = sta;
|
|
acpi_device_get_busid(device);
|
|
acpi_set_pnp_ids(handle, &device->pnp, type);
|
|
acpi_bus_get_flags(device);
|
|
device->flags.match_driver = false;
|
|
device_initialize(&device->dev);
|
|
dev_set_uevent_suppress(&device->dev, true);
|
|
}
|
|
|
|
void acpi_device_add_finalize(struct acpi_device *device)
|
|
{
|
|
device->flags.match_driver = true;
|
|
dev_set_uevent_suppress(&device->dev, false);
|
|
kobject_uevent(&device->dev.kobj, KOBJ_ADD);
|
|
}
|
|
|
|
static int acpi_add_single_object(struct acpi_device **child,
|
|
acpi_handle handle, int type,
|
|
unsigned long long sta)
|
|
{
|
|
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;
|
|
}
|
|
|
|
acpi_init_device_object(device, handle, type, sta);
|
|
acpi_bus_get_power_flags(device);
|
|
acpi_bus_get_wakeup_device_flags(device);
|
|
|
|
result = acpi_device_add(device, acpi_device_release);
|
|
if (result) {
|
|
acpi_device_release(&device->dev);
|
|
return result;
|
|
}
|
|
|
|
acpi_power_add_remove_device(device, true);
|
|
acpi_device_add_finalize(device);
|
|
acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer);
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Added %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;
|
|
return 0;
|
|
}
|
|
|
|
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 bool acpi_scan_handler_matching(struct acpi_scan_handler *handler,
|
|
char *idstr,
|
|
const struct acpi_device_id **matchid)
|
|
{
|
|
const struct acpi_device_id *devid;
|
|
|
|
for (devid = handler->ids; devid->id[0]; devid++)
|
|
if (!strcmp((char *)devid->id, idstr)) {
|
|
if (matchid)
|
|
*matchid = devid;
|
|
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
static struct acpi_scan_handler *acpi_scan_match_handler(char *idstr,
|
|
const struct acpi_device_id **matchid)
|
|
{
|
|
struct acpi_scan_handler *handler;
|
|
|
|
list_for_each_entry(handler, &acpi_scan_handlers_list, list_node)
|
|
if (acpi_scan_handler_matching(handler, idstr, matchid))
|
|
return handler;
|
|
|
|
return NULL;
|
|
}
|
|
|
|
void acpi_scan_hotplug_enabled(struct acpi_hotplug_profile *hotplug, bool val)
|
|
{
|
|
if (!!hotplug->enabled == !!val)
|
|
return;
|
|
|
|
mutex_lock(&acpi_scan_lock);
|
|
|
|
hotplug->enabled = val;
|
|
|
|
mutex_unlock(&acpi_scan_lock);
|
|
}
|
|
|
|
static void acpi_scan_init_hotplug(acpi_handle handle, int type)
|
|
{
|
|
struct acpi_device_pnp pnp = {};
|
|
struct acpi_hardware_id *hwid;
|
|
struct acpi_scan_handler *handler;
|
|
|
|
INIT_LIST_HEAD(&pnp.ids);
|
|
acpi_set_pnp_ids(handle, &pnp, type);
|
|
|
|
if (!pnp.type.hardware_id)
|
|
return;
|
|
|
|
/*
|
|
* This relies on the fact that acpi_install_notify_handler() will not
|
|
* install the same notify handler routine twice for the same handle.
|
|
*/
|
|
list_for_each_entry(hwid, &pnp.ids, list) {
|
|
handler = acpi_scan_match_handler(hwid->id, NULL);
|
|
if (handler) {
|
|
acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY,
|
|
acpi_hotplug_notify_cb, handler);
|
|
break;
|
|
}
|
|
}
|
|
|
|
acpi_free_pnp_ids(&pnp);
|
|
}
|
|
|
|
static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl_not_used,
|
|
void *not_used, void **return_value)
|
|
{
|
|
struct acpi_device *device = NULL;
|
|
int type;
|
|
unsigned long long sta;
|
|
acpi_status status;
|
|
int result;
|
|
|
|
acpi_bus_get_device(handle, &device);
|
|
if (device)
|
|
goto out;
|
|
|
|
result = acpi_bus_type_and_status(handle, &type, &sta);
|
|
if (result)
|
|
return AE_OK;
|
|
|
|
if (type == ACPI_BUS_TYPE_POWER) {
|
|
acpi_add_power_resource(handle);
|
|
return AE_OK;
|
|
}
|
|
|
|
acpi_scan_init_hotplug(handle, type);
|
|
|
|
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);
|
|
acpi_power_resources_list_free(&wakeup.resources);
|
|
}
|
|
return AE_CTRL_DEPTH;
|
|
}
|
|
|
|
acpi_add_single_object(&device, handle, type, sta);
|
|
if (!device)
|
|
return AE_CTRL_DEPTH;
|
|
|
|
out:
|
|
if (!*return_value)
|
|
*return_value = device;
|
|
|
|
return AE_OK;
|
|
}
|
|
|
|
static int acpi_scan_attach_handler(struct acpi_device *device)
|
|
{
|
|
struct acpi_hardware_id *hwid;
|
|
int ret = 0;
|
|
|
|
list_for_each_entry(hwid, &device->pnp.ids, list) {
|
|
const struct acpi_device_id *devid;
|
|
struct acpi_scan_handler *handler;
|
|
|
|
handler = acpi_scan_match_handler(hwid->id, &devid);
|
|
if (handler) {
|
|
ret = handler->attach(device, devid);
|
|
if (ret > 0) {
|
|
device->handler = handler;
|
|
break;
|
|
} else if (ret < 0) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static acpi_status acpi_bus_device_attach(acpi_handle handle, u32 lvl_not_used,
|
|
void *not_used, void **ret_not_used)
|
|
{
|
|
struct acpi_device *device;
|
|
unsigned long long sta_not_used;
|
|
int ret;
|
|
|
|
/*
|
|
* Ignore errors ignored by acpi_bus_check_add() to avoid terminating
|
|
* namespace walks prematurely.
|
|
*/
|
|
if (acpi_bus_type_and_status(handle, &ret, &sta_not_used))
|
|
return AE_OK;
|
|
|
|
if (acpi_bus_get_device(handle, &device))
|
|
return AE_CTRL_DEPTH;
|
|
|
|
ret = acpi_scan_attach_handler(device);
|
|
if (ret)
|
|
return ret > 0 ? AE_OK : AE_CTRL_DEPTH;
|
|
|
|
ret = device_attach(&device->dev);
|
|
return ret >= 0 ? AE_OK : AE_CTRL_DEPTH;
|
|
}
|
|
|
|
/**
|
|
* acpi_bus_scan - Add ACPI device node objects in a given namespace scope.
|
|
* @handle: Root of the namespace scope to scan.
|
|
*
|
|
* Scan a given ACPI tree (probably recently hot-plugged) and create and add
|
|
* found devices.
|
|
*
|
|
* If no devices were found, -ENODEV is returned, but it does not mean that
|
|
* there has been 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 an
|
|
* appropriate driver.
|
|
*
|
|
* Must be called under acpi_scan_lock.
|
|
*/
|
|
int acpi_bus_scan(acpi_handle handle)
|
|
{
|
|
void *device = NULL;
|
|
int error = 0;
|
|
|
|
if (ACPI_SUCCESS(acpi_bus_check_add(handle, 0, NULL, &device)))
|
|
acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX,
|
|
acpi_bus_check_add, NULL, NULL, &device);
|
|
|
|
if (!device)
|
|
error = -ENODEV;
|
|
else if (ACPI_SUCCESS(acpi_bus_device_attach(handle, 0, NULL, NULL)))
|
|
acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX,
|
|
acpi_bus_device_attach, NULL, NULL, NULL);
|
|
|
|
return error;
|
|
}
|
|
EXPORT_SYMBOL(acpi_bus_scan);
|
|
|
|
static acpi_status acpi_bus_device_detach(acpi_handle handle, u32 lvl_not_used,
|
|
void *not_used, void **ret_not_used)
|
|
{
|
|
struct acpi_device *device = NULL;
|
|
|
|
if (!acpi_bus_get_device(handle, &device)) {
|
|
struct acpi_scan_handler *dev_handler = device->handler;
|
|
|
|
device->removal_type = ACPI_BUS_REMOVAL_EJECT;
|
|
if (dev_handler) {
|
|
if (dev_handler->detach)
|
|
dev_handler->detach(device);
|
|
|
|
device->handler = NULL;
|
|
} else {
|
|
device_release_driver(&device->dev);
|
|
}
|
|
}
|
|
return AE_OK;
|
|
}
|
|
|
|
static acpi_status acpi_bus_remove(acpi_handle handle, u32 lvl_not_used,
|
|
void *not_used, void **ret_not_used)
|
|
{
|
|
struct acpi_device *device = NULL;
|
|
|
|
if (!acpi_bus_get_device(handle, &device))
|
|
acpi_device_unregister(device);
|
|
|
|
return AE_OK;
|
|
}
|
|
|
|
/**
|
|
* acpi_bus_trim - Remove ACPI device node and all of its descendants
|
|
* @start: Root of the ACPI device nodes subtree to remove.
|
|
*
|
|
* Must be called under acpi_scan_lock.
|
|
*/
|
|
void acpi_bus_trim(struct acpi_device *start)
|
|
{
|
|
/*
|
|
* Execute acpi_bus_device_detach() as a post-order callback to detach
|
|
* all ACPI drivers from the device nodes being removed.
|
|
*/
|
|
acpi_walk_namespace(ACPI_TYPE_ANY, start->handle, ACPI_UINT32_MAX, NULL,
|
|
acpi_bus_device_detach, NULL, NULL);
|
|
acpi_bus_device_detach(start->handle, 0, NULL, NULL);
|
|
/*
|
|
* Execute acpi_bus_remove() as a post-order callback to remove device
|
|
* nodes in the given namespace scope.
|
|
*/
|
|
acpi_walk_namespace(ACPI_TYPE_ANY, start->handle, ACPI_UINT32_MAX, NULL,
|
|
acpi_bus_remove, NULL, NULL);
|
|
acpi_bus_remove(start->handle, 0, NULL, NULL);
|
|
}
|
|
EXPORT_SYMBOL_GPL(acpi_bus_trim);
|
|
|
|
static int acpi_bus_scan_fixed(void)
|
|
{
|
|
int result = 0;
|
|
|
|
/*
|
|
* Enumerate all fixed-feature devices.
|
|
*/
|
|
if (!(acpi_gbl_FADT.flags & ACPI_FADT_POWER_BUTTON)) {
|
|
struct acpi_device *device = NULL;
|
|
|
|
result = acpi_add_single_object(&device, NULL,
|
|
ACPI_BUS_TYPE_POWER_BUTTON,
|
|
ACPI_STA_DEFAULT);
|
|
if (result)
|
|
return result;
|
|
|
|
result = device_attach(&device->dev);
|
|
if (result < 0)
|
|
return result;
|
|
|
|
device_init_wakeup(&device->dev, true);
|
|
}
|
|
|
|
if (!(acpi_gbl_FADT.flags & ACPI_FADT_SLEEP_BUTTON)) {
|
|
struct acpi_device *device = NULL;
|
|
|
|
result = acpi_add_single_object(&device, NULL,
|
|
ACPI_BUS_TYPE_SLEEP_BUTTON,
|
|
ACPI_STA_DEFAULT);
|
|
if (result)
|
|
return result;
|
|
|
|
result = device_attach(&device->dev);
|
|
}
|
|
|
|
return result < 0 ? result : 0;
|
|
}
|
|
|
|
int __init acpi_scan_init(void)
|
|
{
|
|
int result;
|
|
|
|
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_pci_root_init();
|
|
acpi_pci_link_init();
|
|
acpi_platform_init();
|
|
acpi_lpss_init();
|
|
acpi_csrt_init();
|
|
acpi_container_init();
|
|
acpi_memory_hotplug_init();
|
|
|
|
mutex_lock(&acpi_scan_lock);
|
|
/*
|
|
* Enumerate devices in the ACPI namespace.
|
|
*/
|
|
result = acpi_bus_scan(ACPI_ROOT_OBJECT);
|
|
if (result)
|
|
goto out;
|
|
|
|
result = acpi_bus_get_device(ACPI_ROOT_OBJECT, &acpi_root);
|
|
if (result)
|
|
goto out;
|
|
|
|
result = acpi_bus_scan_fixed();
|
|
if (result) {
|
|
acpi_device_unregister(acpi_root);
|
|
goto out;
|
|
}
|
|
|
|
acpi_update_all_gpes();
|
|
|
|
acpi_pci_root_hp_init();
|
|
|
|
out:
|
|
mutex_unlock(&acpi_scan_lock);
|
|
return result;
|
|
}
|