/* * Copyright (c) 2024, sakumisu * * SPDX-License-Identifier: Apache-2.0 */ #include "usbd_core.h" #include "usbd_audio.h" #define USBD_VID 0xffff #define USBD_PID 0xffff #define USBD_MAX_POWER 100 #define USBD_LANGID_STRING 1033 #ifdef CONFIG_USB_HS #define EP_INTERVAL 0x04 #else #define EP_INTERVAL 0x01 #endif #define AUDIO_OUT_EP 0x01 #define AUDIO_OUT_CLOCK_ID 0x01 #define AUDIO_OUT_FU_ID 0x03 #define AUDIO_FREQ 48000 #define HALF_WORD_BYTES 2 //2 half word (one channel) #define SAMPLE_BITS 16 //16 bit per channel #define BMCONTROL (AUDIO_V2_FU_CONTROL_MUTE | AUDIO_V2_FU_CONTROL_VOLUME) #define OUT_CHANNEL_NUM 2 #if OUT_CHANNEL_NUM == 1 #define OUTPUT_CTRL DBVAL(BMCONTROL), DBVAL(BMCONTROL) #define OUTPUT_CH_ENABLE 0x00000000 #elif OUT_CHANNEL_NUM == 2 #define OUTPUT_CTRL DBVAL(BMCONTROL), DBVAL(BMCONTROL), DBVAL(BMCONTROL) #define OUTPUT_CH_ENABLE 0x00000003 #elif OUT_CHANNEL_NUM == 3 #define OUTPUT_CTRL DBVAL(BMCONTROL), DBVAL(BMCONTROL), DBVAL(BMCONTROL), DBVAL(BMCONTROL) #define OUTPUT_CH_ENABLE 0x00000007 #elif OUT_CHANNEL_NUM == 4 #define OUTPUT_CTRL DBVAL(BMCONTROL), DBVAL(BMCONTROL), DBVAL(BMCONTROL), DBVAL(BMCONTROL), DBVAL(BMCONTROL) #define OUTPUT_CH_ENABLE 0x0000000f #elif OUT_CHANNEL_NUM == 5 #define OUTPUT_CTRL DBVAL(BMCONTROL), DBVAL(BMCONTROL), DBVAL(BMCONTROL), DBVAL(BMCONTROL), DBVAL(BMCONTROL), DBVAL(BMCONTROL) #define OUTPUT_CH_ENABLE 0x0000001f #elif OUT_CHANNEL_NUM == 6 #define OUTPUT_CTRL DBVAL(BMCONTROL), DBVAL(BMCONTROL), DBVAL(BMCONTROL), DBVAL(BMCONTROL), DBVAL(BMCONTROL), DBVAL(BMCONTROL), DBVAL(BMCONTROL) #define OUTPUT_CH_ENABLE 0x0000003F #elif OUT_CHANNEL_NUM == 7 #define OUTPUT_CTRL DBVAL(BMCONTROL), DBVAL(BMCONTROL), DBVAL(BMCONTROL), DBVAL(BMCONTROL), DBVAL(BMCONTROL), DBVAL(BMCONTROL), DBVAL(BMCONTROL), DBVAL(BMCONTROL) #define OUTPUT_CH_ENABLE 0x0000007f #elif OUT_CHANNEL_NUM == 8 #define OUTPUT_CTRL DBVAL(BMCONTROL), DBVAL(BMCONTROL), DBVAL(BMCONTROL), DBVAL(BMCONTROL), DBVAL(BMCONTROL), DBVAL(BMCONTROL), DBVAL(BMCONTROL), DBVAL(BMCONTROL), DBVAL(BMCONTROL) #define OUTPUT_CH_ENABLE 0x000000ff #endif #define AUDIO_OUT_PACKET ((uint32_t)((AUDIO_FREQ * HALF_WORD_BYTES * OUT_CHANNEL_NUM) / 1000)) #define USB_AUDIO_CONFIG_DESC_SIZ (9 + \ AUDIO_V2_AC_DESCRIPTOR_INIT_LEN + \ AUDIO_V2_SIZEOF_AC_CLOCK_SOURCE_DESC + \ AUDIO_V2_SIZEOF_AC_INPUT_TERMINAL_DESC + \ AUDIO_V2_SIZEOF_AC_FEATURE_UNIT_DESC(OUT_CHANNEL_NUM) + \ AUDIO_V2_SIZEOF_AC_OUTPUT_TERMINAL_DESC + \ AUDIO_V2_AS_DESCRIPTOR_INIT_LEN) #define AUDIO_AC_SIZ (AUDIO_V2_SIZEOF_AC_HEADER_DESC + \ AUDIO_V2_SIZEOF_AC_CLOCK_SOURCE_DESC + \ AUDIO_V2_SIZEOF_AC_INPUT_TERMINAL_DESC + \ AUDIO_V2_SIZEOF_AC_FEATURE_UNIT_DESC(OUT_CHANNEL_NUM) + \ AUDIO_V2_SIZEOF_AC_OUTPUT_TERMINAL_DESC) const uint8_t audio_v2_descriptor[] = { USB_DEVICE_DESCRIPTOR_INIT(USB_2_0, 0x00, 0x00, 0x00, USBD_VID, USBD_PID, 0x0001, 0x01), USB_CONFIG_DESCRIPTOR_INIT(USB_AUDIO_CONFIG_DESC_SIZ, 0x02, 0x01, USB_CONFIG_BUS_POWERED, USBD_MAX_POWER), AUDIO_V2_AC_DESCRIPTOR_INIT(0x00, 0x02, AUDIO_AC_SIZ, AUDIO_CATEGORY_SPEAKER, 0x00, 0x00), AUDIO_V2_AC_CLOCK_SOURCE_DESCRIPTOR_INIT(AUDIO_OUT_CLOCK_ID, 0x03, 0x03), AUDIO_V2_AC_INPUT_TERMINAL_DESCRIPTOR_INIT(0x02, AUDIO_TERMINAL_STREAMING, 0x01, OUT_CHANNEL_NUM, OUTPUT_CH_ENABLE, 0x0000), AUDIO_V2_AC_FEATURE_UNIT_DESCRIPTOR_INIT(AUDIO_OUT_FU_ID, 0x02, OUTPUT_CTRL), AUDIO_V2_AC_OUTPUT_TERMINAL_DESCRIPTOR_INIT(0x04, AUDIO_OUTTERM_SPEAKER, 0x03, 0x01, 0x0000), AUDIO_V2_AS_DESCRIPTOR_INIT(0x01, 0x02, OUT_CHANNEL_NUM, OUTPUT_CH_ENABLE, HALF_WORD_BYTES, SAMPLE_BITS, AUDIO_OUT_EP, 0x09, AUDIO_OUT_PACKET, EP_INTERVAL), /////////////////////////////////////// /// string0 descriptor /////////////////////////////////////// USB_LANGID_INIT(USBD_LANGID_STRING), /////////////////////////////////////// /// string1 descriptor /////////////////////////////////////// 0x14, /* bLength */ USB_DESCRIPTOR_TYPE_STRING, /* bDescriptorType */ 'C', 0x00, /* wcChar0 */ 'h', 0x00, /* wcChar1 */ 'e', 0x00, /* wcChar2 */ 'r', 0x00, /* wcChar3 */ 'r', 0x00, /* wcChar4 */ 'y', 0x00, /* wcChar5 */ 'U', 0x00, /* wcChar6 */ 'S', 0x00, /* wcChar7 */ 'B', 0x00, /* wcChar8 */ /////////////////////////////////////// /// string2 descriptor /////////////////////////////////////// 0x26, /* bLength */ USB_DESCRIPTOR_TYPE_STRING, /* bDescriptorType */ 'C', 0x00, /* wcChar0 */ 'h', 0x00, /* wcChar1 */ 'e', 0x00, /* wcChar2 */ 'r', 0x00, /* wcChar3 */ 'r', 0x00, /* wcChar4 */ 'y', 0x00, /* wcChar5 */ 'U', 0x00, /* wcChar6 */ 'S', 0x00, /* wcChar7 */ 'B', 0x00, /* wcChar8 */ ' ', 0x00, /* wcChar9 */ 'U', 0x00, /* wcChar10 */ 'A', 0x00, /* wcChar11 */ 'C', 0x00, /* wcChar12 */ ' ', 0x00, /* wcChar13 */ 'D', 0x00, /* wcChar14 */ 'E', 0x00, /* wcChar15 */ 'M', 0x00, /* wcChar16 */ 'O', 0x00, /* wcChar17 */ /////////////////////////////////////// /// string3 descriptor /////////////////////////////////////// 0x16, /* bLength */ USB_DESCRIPTOR_TYPE_STRING, /* bDescriptorType */ '2', 0x00, /* wcChar0 */ '0', 0x00, /* wcChar1 */ '2', 0x00, /* wcChar2 */ '1', 0x00, /* wcChar3 */ '0', 0x00, /* wcChar4 */ '3', 0x00, /* wcChar5 */ '1', 0x00, /* wcChar6 */ '0', 0x00, /* wcChar7 */ '0', 0x00, /* wcChar8 */ '3', 0x00, /* wcChar9 */ #ifdef CONFIG_USB_HS /////////////////////////////////////// /// device qualifier descriptor /////////////////////////////////////// 0x0a, USB_DESCRIPTOR_TYPE_DEVICE_QUALIFIER, 0x00, 0x02, 0x00, 0x00, 0x00, 0x40, 0x01, 0x00, #endif 0x00 }; static const uint8_t default_sampling_freq_table[] = { AUDIO_SAMPLE_FREQ_NUM(5), AUDIO_SAMPLE_FREQ_4B(8000), AUDIO_SAMPLE_FREQ_4B(8000), AUDIO_SAMPLE_FREQ_4B(0x00), AUDIO_SAMPLE_FREQ_4B(16000), AUDIO_SAMPLE_FREQ_4B(16000), AUDIO_SAMPLE_FREQ_4B(0x00), AUDIO_SAMPLE_FREQ_4B(32000), AUDIO_SAMPLE_FREQ_4B(32000), AUDIO_SAMPLE_FREQ_4B(0x00), AUDIO_SAMPLE_FREQ_4B(48000), AUDIO_SAMPLE_FREQ_4B(48000), AUDIO_SAMPLE_FREQ_4B(0x00), AUDIO_SAMPLE_FREQ_4B(96000), AUDIO_SAMPLE_FREQ_4B(96000), AUDIO_SAMPLE_FREQ_4B(0x00), }; USB_NOCACHE_RAM_SECTION USB_MEM_ALIGNX uint8_t read_buffer[AUDIO_OUT_PACKET]; volatile bool rx_flag = 0; static void usbd_event_handler(uint8_t busid, uint8_t event) { switch (event) { case USBD_EVENT_RESET: break; case USBD_EVENT_CONNECTED: break; case USBD_EVENT_DISCONNECTED: break; case USBD_EVENT_RESUME: break; case USBD_EVENT_SUSPEND: break; case USBD_EVENT_CONFIGURED: break; case USBD_EVENT_SET_REMOTE_WAKEUP: break; case USBD_EVENT_CLR_REMOTE_WAKEUP: break; default: break; } } void usbd_audio_open(uint8_t busid, uint8_t intf) { rx_flag = 1; /* setup first out ep read transfer */ usbd_ep_start_read(busid, AUDIO_OUT_EP, read_buffer, AUDIO_OUT_PACKET); USB_LOG_RAW("OPEN\r\n"); } void usbd_audio_close(uint8_t busid, uint8_t intf) { USB_LOG_RAW("CLOSE\r\n"); rx_flag = 0; } void usbd_audio_get_sampling_freq_table(uint8_t busid, uint8_t ep, uint8_t **sampling_freq_table) { if (ep == AUDIO_OUT_EP) { *sampling_freq_table = (uint8_t *)default_sampling_freq_table; } } void usbd_audio_iso_out_callback(uint8_t busid, uint8_t ep, uint32_t nbytes) { USB_LOG_RAW("actual out len:%d\r\n", nbytes); usbd_ep_start_read(busid, AUDIO_OUT_EP, read_buffer, AUDIO_OUT_PACKET); } static struct usbd_endpoint audio_out_ep = { .ep_cb = usbd_audio_iso_out_callback, .ep_addr = AUDIO_OUT_EP }; struct usbd_interface intf0; struct usbd_interface intf1; struct audio_entity_info audio_entity_table[] = { { .bEntityId = AUDIO_OUT_CLOCK_ID, .bDescriptorSubtype = AUDIO_CONTROL_CLOCK_SOURCE, .ep = AUDIO_OUT_EP }, { .bEntityId = AUDIO_OUT_FU_ID, .bDescriptorSubtype = AUDIO_CONTROL_FEATURE_UNIT, .ep = AUDIO_OUT_EP }, }; void audio_v2_init(uint8_t busid, uint32_t reg_base) { usbd_desc_register(busid, audio_v2_descriptor); usbd_add_interface(busid, usbd_audio_init_intf(busid, &intf0, 0x0200, audio_entity_table, 2)); usbd_add_interface(busid, usbd_audio_init_intf(busid, &intf1, 0x0200, audio_entity_table, 2)); usbd_add_endpoint(busid, &audio_out_ep); usbd_initialize(busid, reg_base, usbd_event_handler); } void audio_v2_test(uint8_t busid) { if (rx_flag) { } }