/* * 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_IN_EP 0x81 #define AUDIO_IN_CLOCK_ID 0x01 #define AUDIO_IN_FU_ID 0x03 #define AUDIO_IN_MAX_FREQ 96000 #define AUDIO_MIC_FRAME_SIZE_BYTE 2u #define AUDIO_MIC_RESOLUTION_BIT 16u #define BMCONTROL (AUDIO_V2_CONTROL_MUTE | AUDIO_V2_CONTROL_VOLUME) #define IN_CHANNEL_NUM 2 #if IN_CHANNEL_NUM == 1 #define INPUT_CTRL DBVAL(BMCONTROL), DBVAL(BMCONTROL) #define INPUT_CH_ENABLE 0x00000001 #elif IN_CHANNEL_NUM == 2 #define INPUT_CTRL DBVAL(BMCONTROL), DBVAL(BMCONTROL), DBVAL(BMCONTROL) #define INPUT_CH_ENABLE 0x00000003 #elif IN_CHANNEL_NUM == 3 #define INPUT_CTRL DBVAL(BMCONTROL), DBVAL(BMCONTROL), DBVAL(BMCONTROL), DBVAL(BMCONTROL) #define INPUT_CH_ENABLE 0x00000007 #elif IN_CHANNEL_NUM == 4 #define INPUT_CTRL DBVAL(BMCONTROL), DBVAL(BMCONTROL), DBVAL(BMCONTROL), DBVAL(BMCONTROL), DBVAL(BMCONTROL) #define INPUT_CH_ENABLE 0x0000000f #elif IN_CHANNEL_NUM == 5 #define INPUT_CTRL DBVAL(BMCONTROL), DBVAL(BMCONTROL), DBVAL(BMCONTROL), DBVAL(BMCONTROL), DBVAL(BMCONTROL), DBVAL(BMCONTROL) #define INPUT_CH_ENABLE 0x0000001f #elif IN_CHANNEL_NUM == 6 #define INPUT_CTRL DBVAL(BMCONTROL), DBVAL(BMCONTROL), DBVAL(BMCONTROL), DBVAL(BMCONTROL), DBVAL(BMCONTROL), DBVAL(BMCONTROL), DBVAL(BMCONTROL) #define INPUT_CH_ENABLE 0x0000003F #elif IN_CHANNEL_NUM == 7 #define INPUT_CTRL DBVAL(BMCONTROL), DBVAL(BMCONTROL), DBVAL(BMCONTROL), DBVAL(BMCONTROL), DBVAL(BMCONTROL), DBVAL(BMCONTROL), DBVAL(BMCONTROL), DBVAL(BMCONTROL) #define INPUT_CH_ENABLE 0x0000007f #elif IN_CHANNEL_NUM == 8 #define INPUT_CTRL DBVAL(BMCONTROL), DBVAL(BMCONTROL), DBVAL(BMCONTROL), DBVAL(BMCONTROL), DBVAL(BMCONTROL), DBVAL(BMCONTROL), DBVAL(BMCONTROL), DBVAL(BMCONTROL), DBVAL(BMCONTROL) #define INPUT_CH_ENABLE 0x000000ff #endif #define AUDIO_IN_PACKET ((uint32_t)((AUDIO_IN_MAX_FREQ * AUDIO_MIC_FRAME_SIZE_BYTE * IN_CHANNEL_NUM) / 1000)) #define USB_CONFIG_SIZE (9 + \ AUDIO_V2_AC_DESCRIPTOR_LEN + \ AUDIO_V2_SIZEOF_AC_CLOCK_SOURCE_DESC + \ AUDIO_V2_SIZEOF_AC_INPUT_TERMINAL_DESC + \ AUDIO_V2_SIZEOF_AC_FEATURE_UNIT_DESC(IN_CHANNEL_NUM) + \ AUDIO_V2_SIZEOF_AC_OUTPUT_TERMINAL_DESC + \ AUDIO_V2_AS_DESCRIPTOR_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(IN_CHANNEL_NUM) + \ AUDIO_V2_SIZEOF_AC_OUTPUT_TERMINAL_DESC) static const uint8_t device_descriptor[] = { USB_DEVICE_DESCRIPTOR_INIT(USB_2_0, 0x00, 0x00, 0x00, USBD_VID, USBD_PID, 0x0001, 0x01) }; static const uint8_t config_descriptor[] = { USB_CONFIG_DESCRIPTOR_INIT(USB_CONFIG_SIZE, 0x02, 0x01, USB_CONFIG_BUS_POWERED, USBD_MAX_POWER), AUDIO_V2_AC_DESCRIPTOR_INIT(0x00, 0x02, AUDIO_AC_SIZ, AUDIO_CATEGORY_MICROPHONE, 0x00, 0x00), AUDIO_V2_AC_CLOCK_SOURCE_DESCRIPTOR_INIT(AUDIO_IN_CLOCK_ID, 0x03, 0x03), AUDIO_V2_AC_INPUT_TERMINAL_DESCRIPTOR_INIT(0x02, AUDIO_INTERM_MIC, AUDIO_IN_CLOCK_ID, IN_CHANNEL_NUM, INPUT_CH_ENABLE, 0x0000), AUDIO_V2_AC_FEATURE_UNIT_DESCRIPTOR_INIT(AUDIO_IN_FU_ID, 0x02, INPUT_CTRL), AUDIO_V2_AC_OUTPUT_TERMINAL_DESCRIPTOR_INIT(0x04, AUDIO_TERMINAL_STREAMING, AUDIO_IN_FU_ID, AUDIO_IN_CLOCK_ID, 0x0000), AUDIO_V2_AS_DESCRIPTOR_INIT(0x01, 0x04, IN_CHANNEL_NUM, INPUT_CH_ENABLE, AUDIO_MIC_FRAME_SIZE_BYTE, AUDIO_MIC_RESOLUTION_BIT, AUDIO_IN_EP, 0x05, (AUDIO_IN_PACKET + 4), EP_INTERVAL) }; static const uint8_t device_quality_descriptor[] = { /////////////////////////////////////// /// device qualifier descriptor /////////////////////////////////////// 0x0a, USB_DESCRIPTOR_TYPE_DEVICE_QUALIFIER, 0x00, 0x02, 0x00, 0x00, 0x00, 0x40, 0x00, 0x00, }; static const char *string_descriptors[] = { (const char[]){ 0x09, 0x04 }, /* Langid */ "CherryUSB", /* Manufacturer */ "CherryUSB UAC DEMO", /* Product */ "2022123456", /* Serial Number */ }; static const uint8_t *device_descriptor_callback(uint8_t speed) { return device_descriptor; } static const uint8_t *config_descriptor_callback(uint8_t speed) { return config_descriptor; } static const uint8_t *device_quality_descriptor_callback(uint8_t speed) { return device_quality_descriptor; } static const char *string_descriptor_callback(uint8_t speed, uint8_t index) { if (index > 3) { return NULL; } return string_descriptors[index]; } const struct usb_descriptor audio_v2_descriptor = { .device_descriptor_callback = device_descriptor_callback, .config_descriptor_callback = config_descriptor_callback, .device_quality_descriptor_callback = device_quality_descriptor_callback, .string_descriptor_callback = string_descriptor_callback }; static const uint8_t mic_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 write_buffer[AUDIO_IN_PACKET]; volatile bool tx_flag = 0; volatile bool ep_tx_busy_flag = false; volatile uint32_t s_mic_sample_rate; 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) { tx_flag = 1; USB_LOG_RAW("OPEN\r\n"); } void usbd_audio_close(uint8_t busid, uint8_t intf) { USB_LOG_RAW("CLOSE\r\n"); tx_flag = 0; } void usbd_audio_set_sampling_freq(uint8_t busid, uint8_t ep, uint32_t sampling_freq) { if (ep == AUDIO_IN_EP) { s_mic_sample_rate = sampling_freq; } } uint32_t usbd_audio_get_sampling_freq(uint8_t busid, uint8_t ep) { (void)busid; uint32_t freq = 0; if (ep == AUDIO_IN_EP) { freq = s_mic_sample_rate; } return freq; } void usbd_audio_get_sampling_freq_table(uint8_t busid, uint8_t ep, uint8_t **sampling_freq_table) { if (ep == AUDIO_IN_EP) { *sampling_freq_table = (uint8_t *)mic_default_sampling_freq_table; } } void usbd_audio_iso_in_callback(uint8_t busid, uint8_t ep, uint32_t nbytes) { ep_tx_busy_flag = false; } static struct usbd_endpoint audio_in_ep = { .ep_cb = usbd_audio_iso_in_callback, .ep_addr = AUDIO_IN_EP }; struct usbd_interface intf0; struct usbd_interface intf1; struct audio_entity_info audio_entity_table[] = { { .bEntityId = AUDIO_IN_CLOCK_ID, .bDescriptorSubtype = AUDIO_CONTROL_CLOCK_SOURCE, .ep = AUDIO_IN_EP }, { .bEntityId = AUDIO_IN_FU_ID, .bDescriptorSubtype = AUDIO_CONTROL_FEATURE_UNIT, .ep = AUDIO_IN_EP }, }; // In windows, audio driver cannot remove auto, so when you modify any descriptor information, please modify string descriptors too. void audio_v2_init(uint8_t busid, uintptr_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_in_ep); usbd_initialize(busid, reg_base, usbd_event_handler); } void audio_v2_test(uint8_t busid) { if (tx_flag) { memset(write_buffer, 'a', AUDIO_IN_PACKET); ep_tx_busy_flag = true; usbd_ep_start_write(busid, AUDIO_IN_EP, write_buffer, AUDIO_IN_PACKET); while (ep_tx_busy_flag) { if (tx_flag == false) { break; } } } }