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
manager_sysfs_add_store(struct kobject * kobj,struct kobj_attribute * attr,const char * buf,size_t count)14 static 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
36 static struct kobj_attribute manager_add_attribute =
37 __ATTR(add, 0664, NULL, manager_sysfs_add_store);
38
manager_sysfs_remove_store(struct kobject * kobj,struct kobj_attribute * attr,const char * buf,size_t count)39 static 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
57 static struct kobj_attribute manager_remove_attribute =
58 __ATTR(remove, 0664, NULL, manager_sysfs_remove_store);
59
manager_sysfs_dump_store(struct kobject * kobj,struct kobj_attribute * attr,const char * buf,size_t count)60 static 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
81 static struct kobj_attribute manager_dump_attribute =
82 __ATTR(dump, 0664, NULL, manager_sysfs_dump_store);
83
manager_sysfs_init_attribute(struct kobject * kobj,struct kobj_attribute * kattr)84 static 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
gb_audio_manager_sysfs_init(struct kobject * kobj)96 void 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