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// SPDX-License-Identifier: GPL-2.0
/*
* Greybus operations
*
* Copyright 2015-2016 Google Inc.
*
* Released under the GPLv2 only.
*/
#include <linux/string.h>
#include <linux/sysfs.h>
#include "audio_manager.h"
#include "audio_manager_private.h"
static ssize_t manager_sysfs_add_store(
struct kobject *kobj, struct kobj_attribute *attr,
const char *buf, size_t count)
{
struct gb_audio_manager_module_descriptor desc = { {0} };
int num = sscanf(buf,
"name=%" GB_AUDIO_MANAGER_MODULE_NAME_LEN_SSCANF "s "
"vid=%d pid=%d intf_id=%d i/p devices=0x%X o/p devices=0x%X",
desc.name, &desc.vid, &desc.pid, &desc.intf_id,
&desc.ip_devices, &desc.op_devices);
if (num != 7)
return -EINVAL;
num = gb_audio_manager_add(&desc);
if (num < 0)
return -EINVAL;
return count;
}
static struct kobj_attribute manager_add_attribute =
__ATTR(add, 0664, NULL, manager_sysfs_add_store);
static ssize_t manager_sysfs_remove_store(
struct kobject *kobj, struct kobj_attribute *attr,
const char *buf, size_t count)
{
int id;
int num = kstrtoint(buf, 10, &id);
if (num != 1)
return -EINVAL;
num = gb_audio_manager_remove(id);
if (num)
return num;
return count;
}
static struct kobj_attribute manager_remove_attribute =
__ATTR(remove, 0664, NULL, manager_sysfs_remove_store);
static ssize_t manager_sysfs_dump_store(
struct kobject *kobj, struct kobj_attribute *attr,
const char *buf, size_t count)
{
int id;
int num = kstrtoint(buf, 10, &id);
if (num == 1) {
num = gb_audio_manager_dump_module(id);
if (num)
return num;
} else if (!strncmp("all", buf, 3)) {
gb_audio_manager_dump_all();
} else {
return -EINVAL;
}
return count;
}
static struct kobj_attribute manager_dump_attribute =
__ATTR(dump, 0664, NULL, manager_sysfs_dump_store);
static void manager_sysfs_init_attribute(
struct kobject *kobj, struct kobj_attribute *kattr)
{
int err;
err = sysfs_create_file(kobj, &kattr->attr);
if (err) {
pr_warn("creating the sysfs entry for %s failed: %d\n",
kattr->attr.name, err);
}
}
void gb_audio_manager_sysfs_init(struct kobject *kobj)
{
manager_sysfs_init_attribute(kobj, &manager_add_attribute);
manager_sysfs_init_attribute(kobj, &manager_remove_attribute);
manager_sysfs_init_attribute(kobj, &manager_dump_attribute);
}
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