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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_CLOCK_ID 0x01
#define AUDIO_IN_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 IN_CHANNEL_NUM 2
#if IN_CHANNEL_NUM == 1
#define INPUT_CTRL DBVAL(BMCONTROL), DBVAL(BMCONTROL)
#define INPUT_CH_ENABLE 0x00000000
#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_FREQ * HALF_WORD_BYTES * IN_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(IN_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(IN_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_MICROPHONE, 0x00, 0x00),
AUDIO_V2_AC_CLOCK_SOURCE_DESCRIPTOR_INIT(0x01, 0x03, 0x03),
AUDIO_V2_AC_INPUT_TERMINAL_DESCRIPTOR_INIT(0x02, AUDIO_INTERM_MIC, 0x01, IN_CHANNEL_NUM, INPUT_CH_ENABLE, 0x0000),
AUDIO_V2_AC_FEATURE_UNIT_DESCRIPTOR_INIT(0x03, 0x02, INPUT_CTRL),
AUDIO_V2_AC_OUTPUT_TERMINAL_DESCRIPTOR_INIT(0x04, AUDIO_TERMINAL_STREAMING, 0x03, 0x01, 0x0000),
AUDIO_V2_AS_DESCRIPTOR_INIT(0x01, 0x04, IN_CHANNEL_NUM, INPUT_CH_ENABLE, HALF_WORD_BYTES, SAMPLE_BITS, AUDIO_IN_EP, 0x05, (AUDIO_IN_PACKET + 4), 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 */
'4', 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 mic_default_sampling_freq_table[] = {
AUDIO_SAMPLE_FREQ_NUM(1),
AUDIO_SAMPLE_FREQ_4B(16000),
AUDIO_SAMPLE_FREQ_4B(16000),
AUDIO_SAMPLE_FREQ_4B(0x00)
};
volatile bool tx_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)
{
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_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)
{
}
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 },
};
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_in_ep);
usbd_initialize(busid, reg_base, usbd_event_handler);
}
void audio_v2_test(uint8_t busid)
{
if (tx_flag) {
}
}
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