// SPDX-License-Identifier: GPL-2.0
/*
 * Greybus operations
 *
 * Copyright 2015-2016 Google Inc.
 */

#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);
}