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ACPI / scan: Move sysfs-related device code to a separate file
To reduce the size of scan.c and improve the readability of it, move all code related to device sysfs, modalias creation etc. to a new file called device_sysfs.c. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Rafael J. Wysocki
parent
21bdb584af
commit
c2efefb33a
@ -24,7 +24,7 @@ acpi-y += nvs.o
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# Power management related files
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# Power management related files
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acpi-y += wakeup.o
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acpi-y += wakeup.o
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acpi-$(CONFIG_ACPI_SYSTEM_POWER_STATES_SUPPORT) += sleep.o
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acpi-$(CONFIG_ACPI_SYSTEM_POWER_STATES_SUPPORT) += sleep.o
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acpi-y += device_pm.o
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acpi-y += device_sysfs.o device_pm.o
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acpi-$(CONFIG_ACPI_SLEEP) += proc.o
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acpi-$(CONFIG_ACPI_SLEEP) += proc.o
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521
drivers/acpi/device_sysfs.c
Normal file
521
drivers/acpi/device_sysfs.c
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@ -0,0 +1,521 @@
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/*
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* drivers/acpi/device_sysfs.c - ACPI device sysfs attributes and modalias.
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*
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* Copyright (C) 2015, Intel Corp.
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* Author: Mika Westerberg <mika.westerberg@linux.intel.com>
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* Author: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as published
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* by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*/
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#include <linux/acpi.h>
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#include <linux/device.h>
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#include <linux/export.h>
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#include <linux/nls.h>
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#include "internal.h"
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/**
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* create_pnp_modalias - Create hid/cid(s) string for modalias and uevent
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* @acpi_dev: ACPI device object.
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* @modalias: Buffer to print into.
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* @size: Size of the buffer.
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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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* Return: 0: no _HID and no _CID
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* -EINVAL: output error
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* -ENOMEM: output is truncated
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*/
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static int create_pnp_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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/*
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* Since we skip ACPI_DT_NAMESPACE_HID from the modalias below, 0 should
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* be returned if ACPI_DT_NAMESPACE_HID is the only ACPI/PNP ID in the
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* device's list.
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*/
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count = 0;
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list_for_each_entry(id, &acpi_dev->pnp.ids, list)
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if (strcmp(id->id, ACPI_DT_NAMESPACE_HID))
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count++;
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if (!count)
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return 0;
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len = snprintf(modalias, size, "acpi:");
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if (len <= 0)
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return len;
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size -= len;
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list_for_each_entry(id, &acpi_dev->pnp.ids, list) {
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if (!strcmp(id->id, ACPI_DT_NAMESPACE_HID))
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continue;
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count = snprintf(&modalias[len], size, "%s:", id->id);
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if (count < 0)
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return -EINVAL;
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if (count >= size)
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return -ENOMEM;
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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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/**
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* create_of_modalias - Creates DT compatible string for modalias and uevent
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* @acpi_dev: ACPI device object.
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* @modalias: Buffer to print into.
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* @size: Size of the buffer.
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*
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* Expose DT compatible modalias as of:NnameTCcompatible. This function should
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* only be called for devices having ACPI_DT_NAMESPACE_HID in their list of
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* ACPI/PNP IDs.
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*/
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static int create_of_modalias(struct acpi_device *acpi_dev, char *modalias,
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int size)
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{
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struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER };
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const union acpi_object *of_compatible, *obj;
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int len, count;
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int i, nval;
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char *c;
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acpi_get_name(acpi_dev->handle, ACPI_SINGLE_NAME, &buf);
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/* DT strings are all in lower case */
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for (c = buf.pointer; *c != '\0'; c++)
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*c = tolower(*c);
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len = snprintf(modalias, size, "of:N%sT", (char *)buf.pointer);
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ACPI_FREE(buf.pointer);
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if (len <= 0)
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return len;
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of_compatible = acpi_dev->data.of_compatible;
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if (of_compatible->type == ACPI_TYPE_PACKAGE) {
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nval = of_compatible->package.count;
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obj = of_compatible->package.elements;
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} else { /* Must be ACPI_TYPE_STRING. */
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nval = 1;
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obj = of_compatible;
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}
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for (i = 0; i < nval; i++, obj++) {
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count = snprintf(&modalias[len], size, "C%s",
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obj->string.pointer);
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if (count < 0)
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return -EINVAL;
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if (count >= size)
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return -ENOMEM;
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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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int __acpi_device_uevent_modalias(struct acpi_device *adev,
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struct kobj_uevent_env *env)
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{
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int len;
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if (!adev)
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return -ENODEV;
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if (list_empty(&adev->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_pnp_modalias(adev, &env->buf[env->buflen - 1],
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sizeof(env->buf) - env->buflen);
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if (len < 0)
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return len;
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env->buflen += len;
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if (!adev->data.of_compatible)
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return 0;
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if (len > 0 && add_uevent_var(env, "MODALIAS="))
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return -ENOMEM;
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len = create_of_modalias(adev, &env->buf[env->buflen - 1],
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sizeof(env->buf) - env->buflen);
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if (len < 0)
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return len;
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env->buflen += len;
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return 0;
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}
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/**
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* acpi_device_uevent_modalias - uevent modalias for ACPI-enumerated devices.
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*
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* Create the uevent modalias field for ACPI-enumerated devices.
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*
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* Because other buses do not support ACPI HIDs & CIDs, e.g. for a device with
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* hid:IBM0001 and cid:ACPI0001 you get: "acpi:IBM0001:ACPI0001".
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*/
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int acpi_device_uevent_modalias(struct device *dev, struct kobj_uevent_env *env)
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{
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return __acpi_device_uevent_modalias(acpi_companion_match(dev), env);
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}
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EXPORT_SYMBOL_GPL(acpi_device_uevent_modalias);
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static int __acpi_device_modalias(struct acpi_device *adev, char *buf, int size)
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{
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int len, count;
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if (!adev)
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return -ENODEV;
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if (list_empty(&adev->pnp.ids))
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return 0;
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len = create_pnp_modalias(adev, buf, size - 1);
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if (len < 0) {
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return len;
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} else if (len > 0) {
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buf[len++] = '\n';
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size -= len;
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}
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if (!adev->data.of_compatible)
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return len;
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count = create_of_modalias(adev, buf + len, size - 1);
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if (count < 0) {
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return count;
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} else if (count > 0) {
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len += count;
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buf[len++] = '\n';
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}
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return len;
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}
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/**
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* acpi_device_modalias - modalias sysfs attribute for ACPI-enumerated devices.
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*
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* Create the modalias sysfs attribute for ACPI-enumerated devices.
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*
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* Because other buses do not support ACPI HIDs & CIDs, e.g. for a device with
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* hid:IBM0001 and cid:ACPI0001 you get: "acpi:IBM0001:ACPI0001".
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*/
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int acpi_device_modalias(struct device *dev, char *buf, int size)
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{
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return __acpi_device_modalias(acpi_companion_match(dev), buf, size);
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}
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EXPORT_SYMBOL_GPL(acpi_device_modalias);
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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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return __acpi_device_modalias(to_acpi_device(dev), buf, 1024);
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}
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static DEVICE_ATTR(modalias, 0444, acpi_device_modalias_show, NULL);
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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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{
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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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ret = acpi_device_get_power(adev, &state);
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if (ret)
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return ret;
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return sprintf(buf, "%s\n", acpi_power_state_string(state));
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}
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static DEVICE_ATTR(real_power_state, 0444, real_power_state_show, NULL);
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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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{
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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));
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}
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static DEVICE_ATTR(power_state, 0444, power_state_show, NULL);
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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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struct acpi_device *acpi_device = to_acpi_device(d);
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acpi_object_type not_used;
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acpi_status status;
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if (!count || buf[0] != '1')
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return -EINVAL;
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if ((!acpi_device->handler || !acpi_device->handler->hotplug.enabled)
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&& !acpi_device->driver)
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return -ENODEV;
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status = acpi_get_type(acpi_device->handle, ¬_used);
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if (ACPI_FAILURE(status) || !acpi_device->flags.ejectable)
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return -ENODEV;
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get_device(&acpi_device->dev);
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status = acpi_hotplug_schedule(acpi_device, ACPI_OST_EC_OSPM_EJECT);
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if (ACPI_SUCCESS(status))
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return count;
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put_device(&acpi_device->dev);
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acpi_evaluate_ost(acpi_device->handle, ACPI_OST_EC_OSPM_EJECT,
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ACPI_OST_SC_NON_SPECIFIC_FAILURE, NULL);
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return status == AE_NO_MEMORY ? -ENOMEM : -EAGAIN;
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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 acpi_device_uid_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct acpi_device *acpi_dev = to_acpi_device(dev);
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return sprintf(buf, "%s\n", acpi_dev->pnp.unique_id);
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}
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static DEVICE_ATTR(uid, 0444, acpi_device_uid_show, NULL);
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static ssize_t acpi_device_adr_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct acpi_device *acpi_dev = to_acpi_device(dev);
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return sprintf(buf, "0x%08x\n",
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(unsigned int)(acpi_dev->pnp.bus_address));
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}
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static DEVICE_ATTR(adr, 0444, acpi_device_adr_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);
|
||||||
|
|
||||||
|
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);
|
||||||
|
acpi_status status;
|
||||||
|
unsigned long long sun;
|
||||||
|
|
||||||
|
status = acpi_evaluate_integer(acpi_dev->handle, "_SUN", NULL, &sun);
|
||||||
|
if (ACPI_FAILURE(status))
|
||||||
|
return -ENODEV;
|
||||||
|
|
||||||
|
return sprintf(buf, "%llu\n", sun);
|
||||||
|
}
|
||||||
|
static DEVICE_ATTR(sun, 0444, acpi_device_sun_show, NULL);
|
||||||
|
|
||||||
|
static ssize_t status_show(struct device *dev, struct device_attribute *attr,
|
||||||
|
char *buf) {
|
||||||
|
struct acpi_device *acpi_dev = to_acpi_device(dev);
|
||||||
|
acpi_status status;
|
||||||
|
unsigned long long sta;
|
||||||
|
|
||||||
|
status = acpi_evaluate_integer(acpi_dev->handle, "_STA", NULL, &sta);
|
||||||
|
if (ACPI_FAILURE(status))
|
||||||
|
return -ENODEV;
|
||||||
|
|
||||||
|
return sprintf(buf, "%llu\n", sta);
|
||||||
|
}
|
||||||
|
static DEVICE_ATTR_RO(status);
|
||||||
|
|
||||||
|
/**
|
||||||
|
* acpi_device_setup_files - Create sysfs attributes of an ACPI device.
|
||||||
|
* @dev: ACPI device object.
|
||||||
|
*/
|
||||||
|
int acpi_device_setup_files(struct acpi_device *dev)
|
||||||
|
{
|
||||||
|
struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
|
||||||
|
acpi_status status;
|
||||||
|
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
|
||||||
|
*/
|
||||||
|
if (acpi_has_method(dev->handle, "_STR")) {
|
||||||
|
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);
|
||||||
|
|
||||||
|
if (acpi_has_method(dev->handle, "_SUN")) {
|
||||||
|
result = device_create_file(&dev->dev, &dev_attr_sun);
|
||||||
|
if (result)
|
||||||
|
goto end;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (acpi_has_method(dev->handle, "_STA")) {
|
||||||
|
result = device_create_file(&dev->dev, &dev_attr_status);
|
||||||
|
if (result)
|
||||||
|
goto end;
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* If device has _EJ0, 'eject' file is created that is used to trigger
|
||||||
|
* hot-removal function from userland.
|
||||||
|
*/
|
||||||
|
if (acpi_has_method(dev->handle, "_EJ0")) {
|
||||||
|
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;
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* acpi_device_remove_files - Remove sysfs attributes of an ACPI device.
|
||||||
|
* @dev: ACPI device object.
|
||||||
|
*/
|
||||||
|
void acpi_device_remove_files(struct acpi_device *dev)
|
||||||
|
{
|
||||||
|
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
|
||||||
|
*/
|
||||||
|
if (acpi_has_method(dev->handle, "_STR")) {
|
||||||
|
kfree(dev->pnp.str_obj);
|
||||||
|
device_remove_file(&dev->dev, &dev_attr_description);
|
||||||
|
}
|
||||||
|
/*
|
||||||
|
* If device has _EJ0, remove 'eject' file.
|
||||||
|
*/
|
||||||
|
if (acpi_has_method(dev->handle, "_EJ0"))
|
||||||
|
device_remove_file(&dev->dev, &dev_attr_eject);
|
||||||
|
|
||||||
|
if (acpi_has_method(dev->handle, "_SUN"))
|
||||||
|
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 (acpi_has_method(dev->handle, "_STA"))
|
||||||
|
device_remove_file(&dev->dev, &dev_attr_status);
|
||||||
|
if (dev->handle)
|
||||||
|
device_remove_file(&dev->dev, &dev_attr_path);
|
||||||
|
}
|
||||||
@ -93,11 +93,20 @@ int acpi_device_add(struct acpi_device *device,
|
|||||||
void (*release)(struct device *));
|
void (*release)(struct device *));
|
||||||
void acpi_init_device_object(struct acpi_device *device, acpi_handle handle,
|
void acpi_init_device_object(struct acpi_device *device, acpi_handle handle,
|
||||||
int type, unsigned long long sta);
|
int type, unsigned long long sta);
|
||||||
|
int acpi_device_setup_files(struct acpi_device *dev);
|
||||||
|
void acpi_device_remove_files(struct acpi_device *dev);
|
||||||
void acpi_device_add_finalize(struct acpi_device *device);
|
void acpi_device_add_finalize(struct acpi_device *device);
|
||||||
void acpi_free_pnp_ids(struct acpi_device_pnp *pnp);
|
void acpi_free_pnp_ids(struct acpi_device_pnp *pnp);
|
||||||
bool acpi_device_is_present(struct acpi_device *adev);
|
bool acpi_device_is_present(struct acpi_device *adev);
|
||||||
bool acpi_device_is_battery(struct acpi_device *adev);
|
bool acpi_device_is_battery(struct acpi_device *adev);
|
||||||
|
|
||||||
|
/* --------------------------------------------------------------------------
|
||||||
|
Device Matching and Notification
|
||||||
|
-------------------------------------------------------------------------- */
|
||||||
|
struct acpi_device *acpi_companion_match(const struct device *dev);
|
||||||
|
int __acpi_device_uevent_modalias(struct acpi_device *adev,
|
||||||
|
struct kobj_uevent_env *env);
|
||||||
|
|
||||||
/* --------------------------------------------------------------------------
|
/* --------------------------------------------------------------------------
|
||||||
Power Resource
|
Power Resource
|
||||||
-------------------------------------------------------------------------- */
|
-------------------------------------------------------------------------- */
|
||||||
|
|||||||
@ -115,117 +115,6 @@ int acpi_scan_add_handler_with_hotplug(struct acpi_scan_handler *handler,
|
|||||||
return 0;
|
return 0;
|
||||||
}
|
}
|
||||||
|
|
||||||
/**
|
|
||||||
* create_pnp_modalias - Create hid/cid(s) string for modalias and uevent
|
|
||||||
* @acpi_dev: ACPI device object.
|
|
||||||
* @modalias: Buffer to print into.
|
|
||||||
* @size: Size of the buffer.
|
|
||||||
*
|
|
||||||
* Creates hid/cid(s) string needed for modalias and uevent
|
|
||||||
* e.g. on a device with hid:IBM0001 and cid:ACPI0001 you get:
|
|
||||||
* char *modalias: "acpi:IBM0001:ACPI0001"
|
|
||||||
* Return: 0: no _HID and no _CID
|
|
||||||
* -EINVAL: output error
|
|
||||||
* -ENOMEM: output is truncated
|
|
||||||
*/
|
|
||||||
static int create_pnp_modalias(struct acpi_device *acpi_dev, char *modalias,
|
|
||||||
int size)
|
|
||||||
{
|
|
||||||
int len;
|
|
||||||
int count;
|
|
||||||
struct acpi_hardware_id *id;
|
|
||||||
|
|
||||||
/*
|
|
||||||
* Since we skip ACPI_DT_NAMESPACE_HID from the modalias below, 0 should
|
|
||||||
* be returned if ACPI_DT_NAMESPACE_HID is the only ACPI/PNP ID in the
|
|
||||||
* device's list.
|
|
||||||
*/
|
|
||||||
count = 0;
|
|
||||||
list_for_each_entry(id, &acpi_dev->pnp.ids, list)
|
|
||||||
if (strcmp(id->id, ACPI_DT_NAMESPACE_HID))
|
|
||||||
count++;
|
|
||||||
|
|
||||||
if (!count)
|
|
||||||
return 0;
|
|
||||||
|
|
||||||
len = snprintf(modalias, size, "acpi:");
|
|
||||||
if (len <= 0)
|
|
||||||
return len;
|
|
||||||
|
|
||||||
size -= len;
|
|
||||||
|
|
||||||
list_for_each_entry(id, &acpi_dev->pnp.ids, list) {
|
|
||||||
if (!strcmp(id->id, ACPI_DT_NAMESPACE_HID))
|
|
||||||
continue;
|
|
||||||
|
|
||||||
count = snprintf(&modalias[len], size, "%s:", id->id);
|
|
||||||
if (count < 0)
|
|
||||||
return -EINVAL;
|
|
||||||
|
|
||||||
if (count >= size)
|
|
||||||
return -ENOMEM;
|
|
||||||
|
|
||||||
len += count;
|
|
||||||
size -= count;
|
|
||||||
}
|
|
||||||
modalias[len] = '\0';
|
|
||||||
return len;
|
|
||||||
}
|
|
||||||
|
|
||||||
/**
|
|
||||||
* create_of_modalias - Creates DT compatible string for modalias and uevent
|
|
||||||
* @acpi_dev: ACPI device object.
|
|
||||||
* @modalias: Buffer to print into.
|
|
||||||
* @size: Size of the buffer.
|
|
||||||
*
|
|
||||||
* Expose DT compatible modalias as of:NnameTCcompatible. This function should
|
|
||||||
* only be called for devices having ACPI_DT_NAMESPACE_HID in their list of
|
|
||||||
* ACPI/PNP IDs.
|
|
||||||
*/
|
|
||||||
static int create_of_modalias(struct acpi_device *acpi_dev, char *modalias,
|
|
||||||
int size)
|
|
||||||
{
|
|
||||||
struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER };
|
|
||||||
const union acpi_object *of_compatible, *obj;
|
|
||||||
int len, count;
|
|
||||||
int i, nval;
|
|
||||||
char *c;
|
|
||||||
|
|
||||||
acpi_get_name(acpi_dev->handle, ACPI_SINGLE_NAME, &buf);
|
|
||||||
/* DT strings are all in lower case */
|
|
||||||
for (c = buf.pointer; *c != '\0'; c++)
|
|
||||||
*c = tolower(*c);
|
|
||||||
|
|
||||||
len = snprintf(modalias, size, "of:N%sT", (char *)buf.pointer);
|
|
||||||
ACPI_FREE(buf.pointer);
|
|
||||||
|
|
||||||
if (len <= 0)
|
|
||||||
return len;
|
|
||||||
|
|
||||||
of_compatible = acpi_dev->data.of_compatible;
|
|
||||||
if (of_compatible->type == ACPI_TYPE_PACKAGE) {
|
|
||||||
nval = of_compatible->package.count;
|
|
||||||
obj = of_compatible->package.elements;
|
|
||||||
} else { /* Must be ACPI_TYPE_STRING. */
|
|
||||||
nval = 1;
|
|
||||||
obj = of_compatible;
|
|
||||||
}
|
|
||||||
for (i = 0; i < nval; i++, obj++) {
|
|
||||||
count = snprintf(&modalias[len], size, "C%s",
|
|
||||||
obj->string.pointer);
|
|
||||||
if (count < 0)
|
|
||||||
return -EINVAL;
|
|
||||||
|
|
||||||
if (count >= size)
|
|
||||||
return -ENOMEM;
|
|
||||||
|
|
||||||
len += count;
|
|
||||||
size -= count;
|
|
||||||
}
|
|
||||||
modalias[len] = '\0';
|
|
||||||
return len;
|
|
||||||
}
|
|
||||||
|
|
||||||
/*
|
/*
|
||||||
* acpi_companion_match() - Can we match via ACPI companion device
|
* acpi_companion_match() - Can we match via ACPI companion device
|
||||||
* @dev: Device in question
|
* @dev: Device in question
|
||||||
@ -247,7 +136,7 @@ static int create_of_modalias(struct acpi_device *acpi_dev, char *modalias,
|
|||||||
* resources available from it but they will be matched normally using functions
|
* resources available from it but they will be matched normally using functions
|
||||||
* provided by their bus types (and analogously for their modalias).
|
* provided by their bus types (and analogously for their modalias).
|
||||||
*/
|
*/
|
||||||
static struct acpi_device *acpi_companion_match(const struct device *dev)
|
struct acpi_device *acpi_companion_match(const struct device *dev)
|
||||||
{
|
{
|
||||||
struct acpi_device *adev;
|
struct acpi_device *adev;
|
||||||
struct mutex *physical_node_lock;
|
struct mutex *physical_node_lock;
|
||||||
@ -276,103 +165,6 @@ static struct acpi_device *acpi_companion_match(const struct device *dev)
|
|||||||
return adev;
|
return adev;
|
||||||
}
|
}
|
||||||
|
|
||||||
static int __acpi_device_uevent_modalias(struct acpi_device *adev,
|
|
||||||
struct kobj_uevent_env *env)
|
|
||||||
{
|
|
||||||
int len;
|
|
||||||
|
|
||||||
if (!adev)
|
|
||||||
return -ENODEV;
|
|
||||||
|
|
||||||
if (list_empty(&adev->pnp.ids))
|
|
||||||
return 0;
|
|
||||||
|
|
||||||
if (add_uevent_var(env, "MODALIAS="))
|
|
||||||
return -ENOMEM;
|
|
||||||
|
|
||||||
len = create_pnp_modalias(adev, &env->buf[env->buflen - 1],
|
|
||||||
sizeof(env->buf) - env->buflen);
|
|
||||||
if (len < 0)
|
|
||||||
return len;
|
|
||||||
|
|
||||||
env->buflen += len;
|
|
||||||
if (!adev->data.of_compatible)
|
|
||||||
return 0;
|
|
||||||
|
|
||||||
if (len > 0 && add_uevent_var(env, "MODALIAS="))
|
|
||||||
return -ENOMEM;
|
|
||||||
|
|
||||||
len = create_of_modalias(adev, &env->buf[env->buflen - 1],
|
|
||||||
sizeof(env->buf) - env->buflen);
|
|
||||||
if (len < 0)
|
|
||||||
return len;
|
|
||||||
|
|
||||||
env->buflen += len;
|
|
||||||
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
|
|
||||||
/*
|
|
||||||
* Creates uevent modalias field for ACPI enumerated devices.
|
|
||||||
* Because the other buses does not support ACPI HIDs & CIDs.
|
|
||||||
* e.g. for a device with hid:IBM0001 and cid:ACPI0001 you get:
|
|
||||||
* "acpi:IBM0001:ACPI0001"
|
|
||||||
*/
|
|
||||||
int acpi_device_uevent_modalias(struct device *dev, struct kobj_uevent_env *env)
|
|
||||||
{
|
|
||||||
return __acpi_device_uevent_modalias(acpi_companion_match(dev), env);
|
|
||||||
}
|
|
||||||
EXPORT_SYMBOL_GPL(acpi_device_uevent_modalias);
|
|
||||||
|
|
||||||
static int __acpi_device_modalias(struct acpi_device *adev, char *buf, int size)
|
|
||||||
{
|
|
||||||
int len, count;
|
|
||||||
|
|
||||||
if (!adev)
|
|
||||||
return -ENODEV;
|
|
||||||
|
|
||||||
if (list_empty(&adev->pnp.ids))
|
|
||||||
return 0;
|
|
||||||
|
|
||||||
len = create_pnp_modalias(adev, buf, size - 1);
|
|
||||||
if (len < 0) {
|
|
||||||
return len;
|
|
||||||
} else if (len > 0) {
|
|
||||||
buf[len++] = '\n';
|
|
||||||
size -= len;
|
|
||||||
}
|
|
||||||
if (!adev->data.of_compatible)
|
|
||||||
return len;
|
|
||||||
|
|
||||||
count = create_of_modalias(adev, buf + len, size - 1);
|
|
||||||
if (count < 0) {
|
|
||||||
return count;
|
|
||||||
} else if (count > 0) {
|
|
||||||
len += count;
|
|
||||||
buf[len++] = '\n';
|
|
||||||
}
|
|
||||||
|
|
||||||
return len;
|
|
||||||
}
|
|
||||||
|
|
||||||
/*
|
|
||||||
* Creates modalias sysfs attribute for ACPI enumerated devices.
|
|
||||||
* Because the other buses does not support ACPI HIDs & CIDs.
|
|
||||||
* e.g. for a device with hid:IBM0001 and cid:ACPI0001 you get:
|
|
||||||
* "acpi:IBM0001:ACPI0001"
|
|
||||||
*/
|
|
||||||
int acpi_device_modalias(struct device *dev, char *buf, int size)
|
|
||||||
{
|
|
||||||
return __acpi_device_modalias(acpi_companion_match(dev), buf, size);
|
|
||||||
}
|
|
||||||
EXPORT_SYMBOL_GPL(acpi_device_modalias);
|
|
||||||
|
|
||||||
static ssize_t
|
|
||||||
acpi_device_modalias_show(struct device *dev, struct device_attribute *attr, char *buf) {
|
|
||||||
return __acpi_device_modalias(to_acpi_device(dev), buf, 1024);
|
|
||||||
}
|
|
||||||
static DEVICE_ATTR(modalias, 0444, acpi_device_modalias_show, NULL);
|
|
||||||
|
|
||||||
bool acpi_scan_is_offline(struct acpi_device *adev, bool uevent)
|
bool acpi_scan_is_offline(struct acpi_device *adev, bool uevent)
|
||||||
{
|
{
|
||||||
struct acpi_device_physical_node *pn;
|
struct acpi_device_physical_node *pn;
|
||||||
@ -701,279 +493,6 @@ void acpi_device_hotplug(struct acpi_device *adev, u32 src)
|
|||||||
unlock_device_hotplug();
|
unlock_device_hotplug();
|
||||||
}
|
}
|
||||||
|
|
||||||
static ssize_t real_power_state_show(struct device *dev,
|
|
||||||
struct device_attribute *attr, char *buf)
|
|
||||||
{
|
|
||||||
struct acpi_device *adev = to_acpi_device(dev);
|
|
||||||
int state;
|
|
||||||
int ret;
|
|
||||||
|
|
||||||
ret = acpi_device_get_power(adev, &state);
|
|
||||||
if (ret)
|
|
||||||
return ret;
|
|
||||||
|
|
||||||
return sprintf(buf, "%s\n", acpi_power_state_string(state));
|
|
||||||
}
|
|
||||||
|
|
||||||
static DEVICE_ATTR(real_power_state, 0444, real_power_state_show, NULL);
|
|
||||||
|
|
||||||
static ssize_t power_state_show(struct device *dev,
|
|
||||||
struct device_attribute *attr, char *buf)
|
|
||||||
{
|
|
||||||
struct acpi_device *adev = to_acpi_device(dev);
|
|
||||||
|
|
||||||
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);
|
|
||||||
acpi_object_type not_used;
|
|
||||||
acpi_status status;
|
|
||||||
|
|
||||||
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;
|
|
||||||
|
|
||||||
get_device(&acpi_device->dev);
|
|
||||||
status = acpi_hotplug_schedule(acpi_device, ACPI_OST_EC_OSPM_EJECT);
|
|
||||||
if (ACPI_SUCCESS(status))
|
|
||||||
return count;
|
|
||||||
|
|
||||||
put_device(&acpi_device->dev);
|
|
||||||
acpi_evaluate_ost(acpi_device->handle, ACPI_OST_EC_OSPM_EJECT,
|
|
||||||
ACPI_OST_SC_NON_SPECIFIC_FAILURE, NULL);
|
|
||||||
return status == AE_NO_MEMORY ? -ENOMEM : -EAGAIN;
|
|
||||||
}
|
|
||||||
|
|
||||||
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);
|
|
||||||
acpi_status status;
|
|
||||||
unsigned long long sun;
|
|
||||||
|
|
||||||
status = acpi_evaluate_integer(acpi_dev->handle, "_SUN", NULL, &sun);
|
|
||||||
if (ACPI_FAILURE(status))
|
|
||||||
return -ENODEV;
|
|
||||||
|
|
||||||
return sprintf(buf, "%llu\n", sun);
|
|
||||||
}
|
|
||||||
static DEVICE_ATTR(sun, 0444, acpi_device_sun_show, NULL);
|
|
||||||
|
|
||||||
static ssize_t status_show(struct device *dev, struct device_attribute *attr,
|
|
||||||
char *buf) {
|
|
||||||
struct acpi_device *acpi_dev = to_acpi_device(dev);
|
|
||||||
acpi_status status;
|
|
||||||
unsigned long long sta;
|
|
||||||
|
|
||||||
status = acpi_evaluate_integer(acpi_dev->handle, "_STA", NULL, &sta);
|
|
||||||
if (ACPI_FAILURE(status))
|
|
||||||
return -ENODEV;
|
|
||||||
|
|
||||||
return sprintf(buf, "%llu\n", sta);
|
|
||||||
}
|
|
||||||
static DEVICE_ATTR_RO(status);
|
|
||||||
|
|
||||||
static int acpi_device_setup_files(struct acpi_device *dev)
|
|
||||||
{
|
|
||||||
struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
|
|
||||||
acpi_status status;
|
|
||||||
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
|
|
||||||
*/
|
|
||||||
if (acpi_has_method(dev->handle, "_STR")) {
|
|
||||||
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);
|
|
||||||
|
|
||||||
if (acpi_has_method(dev->handle, "_SUN")) {
|
|
||||||
result = device_create_file(&dev->dev, &dev_attr_sun);
|
|
||||||
if (result)
|
|
||||||
goto end;
|
|
||||||
}
|
|
||||||
|
|
||||||
if (acpi_has_method(dev->handle, "_STA")) {
|
|
||||||
result = device_create_file(&dev->dev, &dev_attr_status);
|
|
||||||
if (result)
|
|
||||||
goto end;
|
|
||||||
}
|
|
||||||
|
|
||||||
/*
|
|
||||||
* If device has _EJ0, 'eject' file is created that is used to trigger
|
|
||||||
* hot-removal function from userland.
|
|
||||||
*/
|
|
||||||
if (acpi_has_method(dev->handle, "_EJ0")) {
|
|
||||||
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)
|
|
||||||
{
|
|
||||||
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
|
|
||||||
*/
|
|
||||||
if (acpi_has_method(dev->handle, "_STR")) {
|
|
||||||
kfree(dev->pnp.str_obj);
|
|
||||||
device_remove_file(&dev->dev, &dev_attr_description);
|
|
||||||
}
|
|
||||||
/*
|
|
||||||
* If device has _EJ0, remove 'eject' file.
|
|
||||||
*/
|
|
||||||
if (acpi_has_method(dev->handle, "_EJ0"))
|
|
||||||
device_remove_file(&dev->dev, &dev_attr_eject);
|
|
||||||
|
|
||||||
if (acpi_has_method(dev->handle, "_SUN"))
|
|
||||||
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 (acpi_has_method(dev->handle, "_STA"))
|
|
||||||
device_remove_file(&dev->dev, &dev_attr_status);
|
|
||||||
if (dev->handle)
|
|
||||||
device_remove_file(&dev->dev, &dev_attr_path);
|
|
||||||
}
|
|
||||||
/* --------------------------------------------------------------------------
|
/* --------------------------------------------------------------------------
|
||||||
ACPI Bus operations
|
ACPI Bus operations
|
||||||
-------------------------------------------------------------------------- */
|
-------------------------------------------------------------------------- */
|
||||||
|
|||||||
Loading…
Reference in New Issue
Block a user