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/*
* 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_FU_ID 0x02
#define AUDIO_MIC_FREQ 16000U
#define AUDIO_MIC_FRAME_SIZE_BYTE 2u
#define AUDIO_MIC_RESOLUTION_BIT 16u
#define IN_CHANNEL_NUM 2
#if IN_CHANNEL_NUM == 1
#define INPUT_CTRL 0x03, 0x03
#define INPUT_CH_ENABLE 0x0001
#elif IN_CHANNEL_NUM == 2
#define INPUT_CTRL 0x03, 0x03, 0x03
#define INPUT_CH_ENABLE 0x0003
#elif IN_CHANNEL_NUM == 3
#define INPUT_CTRL 0x03, 0x03, 0x03, 0x03
#define INPUT_CH_ENABLE 0x0007
#elif IN_CHANNEL_NUM == 4
#define INPUT_CTRL 0x03, 0x03, 0x03, 0x03, 0x03
#define INPUT_CH_ENABLE 0x000f
#elif IN_CHANNEL_NUM == 5
#define INPUT_CTRL 0x03, 0x03, 0x03, 0x03, 0x03, 0x03
#define INPUT_CH_ENABLE 0x001f
#elif IN_CHANNEL_NUM == 6
#define INPUT_CTRL 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03
#define INPUT_CH_ENABLE 0x003F
#elif IN_CHANNEL_NUM == 7
#define INPUT_CTRL 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03
#define INPUT_CH_ENABLE 0x007f
#elif IN_CHANNEL_NUM == 8
#define INPUT_CTRL 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03
#define INPUT_CH_ENABLE 0x00ff
#endif
/* AudioFreq * DataSize (2 bytes) * NumChannels (Stereo: 1) */
/* 16bit(2 Bytes) 单声道(Mono:1) */
#define AUDIO_IN_PACKET ((uint32_t)((AUDIO_MIC_FREQ * AUDIO_MIC_FRAME_SIZE_BYTE * IN_CHANNEL_NUM) / 1000))
#define USB_CONFIG_SIZE (unsigned long)(9 + \
AUDIO_AC_DESCRIPTOR_LEN(1) + \
AUDIO_SIZEOF_AC_INPUT_TERMINAL_DESC + \
AUDIO_SIZEOF_AC_FEATURE_UNIT_DESC(IN_CHANNEL_NUM, 1) + \
AUDIO_SIZEOF_AC_OUTPUT_TERMINAL_DESC + \
AUDIO_AS_DESCRIPTOR_LEN(1))
#define AUDIO_AC_SIZ (AUDIO_SIZEOF_AC_HEADER_DESC(1) + \
AUDIO_SIZEOF_AC_INPUT_TERMINAL_DESC + \
AUDIO_SIZEOF_AC_FEATURE_UNIT_DESC(IN_CHANNEL_NUM, 1) + \
AUDIO_SIZEOF_AC_OUTPUT_TERMINAL_DESC)
static const uint8_t device_descriptor[] = {
USB_DEVICE_DESCRIPTOR_INIT(USB_2_0, 0xef, 0x02, 0x01, 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_AC_DESCRIPTOR_INIT(0x00, 0x02, AUDIO_AC_SIZ, 0x00, 0x01),
AUDIO_AC_INPUT_TERMINAL_DESCRIPTOR_INIT(0x01, AUDIO_INTERM_MIC, IN_CHANNEL_NUM, INPUT_CH_ENABLE),
AUDIO_AC_FEATURE_UNIT_DESCRIPTOR_INIT(AUDIO_IN_FU_ID, 0x01, 0x01, INPUT_CTRL),
AUDIO_AC_OUTPUT_TERMINAL_DESCRIPTOR_INIT(0x03, AUDIO_TERMINAL_STREAMING, AUDIO_IN_FU_ID),
AUDIO_AS_DESCRIPTOR_INIT(0x01, 0x03, IN_CHANNEL_NUM, AUDIO_MIC_FRAME_SIZE_BYTE, AUDIO_MIC_RESOLUTION_BIT, AUDIO_IN_EP, 0x05, AUDIO_IN_PACKET, EP_INTERVAL, AUDIO_SAMPLE_FREQ_3B(AUDIO_MIC_FREQ))
};
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 >= (sizeof(string_descriptors) / sizeof(char *))) {
return NULL;
}
return string_descriptors[index];
}
const struct usb_descriptor audio_v1_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
};
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;
ep_tx_busy_flag = false;
USB_LOG_RAW("OPEN\r\n");
}
void usbd_audio_close(uint8_t busid, uint8_t intf)
{
USB_LOG_RAW("CLOSE\r\n");
ep_tx_busy_flag = false;
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_iso_callback(uint8_t busid, uint8_t ep, uint32_t nbytes)
{
USB_LOG_RAW("actual in len:%d\r\n", (unsigned int)nbytes);
ep_tx_busy_flag = false;
}
static struct usbd_endpoint audio_in_ep = {
.ep_cb = usbd_audio_iso_callback,
.ep_addr = AUDIO_IN_EP
};
struct usbd_interface intf0;
struct usbd_interface intf1;
struct audio_entity_info audio_entity_table[] = {
{ .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_v1_init(uint8_t busid, uintptr_t reg_base)
{
usbd_desc_register(busid, &audio_v1_descriptor);
usbd_add_interface(busid, usbd_audio_init_intf(busid, &intf0, 0x0100, audio_entity_table, 1));
usbd_add_interface(busid, usbd_audio_init_intf(busid, &intf1, 0x0100, audio_entity_table, 1));
usbd_add_endpoint(busid, &audio_in_ep);
usbd_initialize(busid, reg_base, usbd_event_handler);
}
USB_NOCACHE_RAM_SECTION USB_MEM_ALIGNX uint8_t write_buffer[AUDIO_IN_PACKET];
void audio_test(uint8_t busid)
{
while (1) {
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;
}
}
}
}
}
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