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 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 "s " 22 "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 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 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 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 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