1 /* 2 * Greybus operations 3 * 4 * Copyright 2015-2016 Google Inc. 5 * 6 * Released under the GPLv2 only. 7 */ 8 9 #ifndef _GB_AUDIO_MANAGER_H_ 10 #define _GB_AUDIO_MANAGER_H_ 11 12 #include <linux/kobject.h> 13 #include <linux/list.h> 14 15 #define GB_AUDIO_MANAGER_NAME "gb_audio_manager" 16 #define GB_AUDIO_MANAGER_MODULE_NAME_LEN 64 17 #define GB_AUDIO_MANAGER_MODULE_NAME_LEN_SSCANF "63" 18 19 struct gb_audio_manager_module_descriptor { 20 char name[GB_AUDIO_MANAGER_MODULE_NAME_LEN]; 21 int vid; 22 int pid; 23 int intf_id; 24 unsigned int ip_devices; 25 unsigned int op_devices; 26 }; 27 28 struct gb_audio_manager_module { 29 struct kobject kobj; 30 struct list_head list; 31 int id; 32 struct gb_audio_manager_module_descriptor desc; 33 }; 34 35 /* 36 * Creates a new gb_audio_manager_module_descriptor, using the specified 37 * descriptor. 38 * 39 * Returns a negative result on error, or the id of the newly created module. 40 * 41 */ 42 int gb_audio_manager_add(struct gb_audio_manager_module_descriptor *desc); 43 44 /* 45 * Removes a connected gb_audio_manager_module_descriptor for the specified ID. 46 * 47 * Returns zero on success, or a negative value on error. 48 */ 49 int gb_audio_manager_remove(int id); 50 51 /* 52 * Removes all connected gb_audio_modules 53 * 54 * Returns zero on success, or a negative value on error. 55 */ 56 void gb_audio_manager_remove_all(void); 57 58 /* 59 * Retrieves a gb_audio_manager_module_descriptor for the specified id. 60 * Returns the gb_audio_manager_module_descriptor structure, 61 * or NULL if there is no module with the specified ID. 62 */ 63 struct gb_audio_manager_module *gb_audio_manager_get_module(int id); 64 65 /* 66 * Decreases the refcount of the module, obtained by the get function. 67 * Modules are removed via gb_audio_manager_remove 68 */ 69 void gb_audio_manager_put_module(struct gb_audio_manager_module *module); 70 71 /* 72 * Dumps the module for the specified id 73 * Return 0 on success 74 */ 75 int gb_audio_manager_dump_module(int id); 76 77 /* 78 * Dumps all connected modules 79 */ 80 void gb_audio_manager_dump_all(void); 81 82 #endif /* _GB_AUDIO_MANAGER_H_ */ 83