1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Greybus operations
4 *
5 * Copyright 2015-2016 Google Inc.
6 */
7
8#include <linux/string.h>
9#include <linux/sysfs.h>
10
11#include "audio_manager.h"
12#include "audio_manager_private.h"
13
14static ssize_t manager_sysfs_add_store(struct kobject *kobj,
15				       struct kobj_attribute *attr,
16				       const char *buf, size_t count)
17{
18	struct gb_audio_manager_module_descriptor desc = { {0} };
19
20	int num = sscanf(buf,
21			"name=%" GB_AUDIO_MANAGER_MODULE_NAME_LEN_SSCANF
22			"s vid=%d pid=%d intf_id=%d i/p devices=0x%X o/p devices=0x%X",
23			desc.name, &desc.vid, &desc.pid, &desc.intf_id,
24			&desc.ip_devices, &desc.op_devices);
25
26	if (num != 7)
27		return -EINVAL;
28
29	num = gb_audio_manager_add(&desc);
30	if (num < 0)
31		return -EINVAL;
32
33	return count;
34}
35
36static struct kobj_attribute manager_add_attribute =
37	__ATTR(add, 0664, NULL, manager_sysfs_add_store);
38
39static ssize_t manager_sysfs_remove_store(struct kobject *kobj,
40					  struct kobj_attribute *attr,
41					  const char *buf, size_t count)
42{
43	int id;
44
45	int num = kstrtoint(buf, 10, &id);
46
47	if (num != 1)
48		return -EINVAL;
49
50	num = gb_audio_manager_remove(id);
51	if (num)
52		return num;
53
54	return count;
55}
56
57static struct kobj_attribute manager_remove_attribute =
58	__ATTR(remove, 0664, NULL, manager_sysfs_remove_store);
59
60static ssize_t manager_sysfs_dump_store(struct kobject *kobj,
61					struct kobj_attribute *attr,
62					const char *buf, size_t count)
63{
64	int id;
65
66	int num = kstrtoint(buf, 10, &id);
67
68	if (num == 1) {
69		num = gb_audio_manager_dump_module(id);
70		if (num)
71			return num;
72	} else if (!strncmp("all", buf, 3)) {
73		gb_audio_manager_dump_all();
74	} else {
75		return -EINVAL;
76	}
77
78	return count;
79}
80
81static struct kobj_attribute manager_dump_attribute =
82	__ATTR(dump, 0664, NULL, manager_sysfs_dump_store);
83
84static void manager_sysfs_init_attribute(struct kobject *kobj,
85					 struct kobj_attribute *kattr)
86{
87	int err;
88
89	err = sysfs_create_file(kobj, &kattr->attr);
90	if (err) {
91		pr_warn("creating the sysfs entry for %s failed: %d\n",
92			kattr->attr.name, err);
93	}
94}
95
96void gb_audio_manager_sysfs_init(struct kobject *kobj)
97{
98	manager_sysfs_init_attribute(kobj, &manager_add_attribute);
99	manager_sysfs_init_attribute(kobj, &manager_remove_attribute);
100	manager_sysfs_init_attribute(kobj, &manager_dump_attribute);
101}
102