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/*
* Copyright (c) 2022, sakumisu
*
* SPDX-License-Identifier: Apache-2.0
*/
#include "usbd_core.h"
#include "usbd_audio.h"
struct audio_entity_param {
uint32_t wCur;
uint32_t wMin;
uint32_t wMax;
uint32_t wRes;
};
struct usbd_audio_priv {
struct audio_entity_info *table;
uint8_t num;
uint16_t uac_version;
} g_usbd_audio[CONFIG_USBDEV_MAX_BUS];
static int audio_class_endpoint_request_handler(uint8_t busid, struct usb_setup_packet *setup, uint8_t **data, uint32_t *len)
{
uint8_t control_selector;
uint32_t sampling_freq = 0;
uint8_t ep;
control_selector = HI_BYTE(setup->wValue);
ep = LO_BYTE(setup->wIndex);
switch (control_selector) {
case AUDIO_EP_CONTROL_SAMPLING_FEQ:
switch (setup->bRequest) {
case AUDIO_REQUEST_SET_CUR:
memcpy((uint8_t *)&sampling_freq, *data, 3);
USB_LOG_DBG("Set ep:0x%02x %d Hz\r\n", ep, (int)sampling_freq);
usbd_audio_set_sampling_freq(busid, ep, sampling_freq);
break;
case AUDIO_REQUEST_GET_CUR:
case AUDIO_REQUEST_GET_MIN:
case AUDIO_REQUEST_GET_MAX:
case AUDIO_REQUEST_GET_RES:
sampling_freq = usbd_audio_get_sampling_freq(busid, ep);
memcpy(*data, &sampling_freq, 3);
USB_LOG_DBG("Get ep:0x%02x %d Hz\r\n", ep, (int)sampling_freq);
*len = 3;
break;
}
break;
default:
return -1;
}
return 0;
}
static int audio_class_interface_request_handler(uint8_t busid, struct usb_setup_packet *setup, uint8_t **data, uint32_t *len)
{
USB_LOG_DBG("Audio Class request: "
"bRequest 0x%02x\r\n",
setup->bRequest);
uint8_t entity_id;
uint8_t ep = 0;
uint8_t subtype = 0x01;
uint8_t control_selector;
uint8_t ch;
uint8_t mute;
uint16_t volume;
int volume_db = 0;
uint32_t sampling_freq = 0;
const char *mute_string[2] = { "off", "on" };
entity_id = HI_BYTE(setup->wIndex);
control_selector = HI_BYTE(setup->wValue);
ch = LO_BYTE(setup->wValue);
ARG_UNUSED(mute_string);
for (uint8_t i = 0; i < g_usbd_audio[busid].num; i++) {
if (g_usbd_audio[busid].table[i].bEntityId == entity_id) {
subtype = g_usbd_audio[busid].table[i].bDescriptorSubtype;
ep = g_usbd_audio[busid].table[i].ep;
break;
}
}
if (subtype == 0x01) {
USB_LOG_ERR("Do not find subtype for 0x%02x\r\n", entity_id);
return -1;
}
USB_LOG_DBG("Audio entity_id:%02x, subtype:%02x, cs:%02x\r\n", entity_id, subtype, control_selector);
switch (subtype) {
case AUDIO_CONTROL_FEATURE_UNIT:
switch (control_selector) {
case AUDIO_FU_CONTROL_MUTE:
if (g_usbd_audio[busid].uac_version < 0x0200) {
switch (setup->bRequest) {
case AUDIO_REQUEST_SET_CUR:
mute = (*data)[0];
usbd_audio_set_mute(busid, ep, ch, mute);
break;
case AUDIO_REQUEST_GET_CUR:
(*data)[0] = usbd_audio_get_mute(busid, ep, ch);
*len = 1;
break;
default:
return -1;
}
} else {
switch (setup->bRequest) {
case AUDIO_REQUEST_CUR:
if (setup->bmRequestType & USB_REQUEST_DIR_MASK) {
(*data)[0] = usbd_audio_get_mute(busid, ep, ch);
*len = 1;
} else {
mute = (*data)[0];
usbd_audio_set_mute(busid, ep, ch, mute);
}
break;
default:
return -1;
}
}
break;
case AUDIO_FU_CONTROL_VOLUME:
if (g_usbd_audio[busid].uac_version < 0x0200) {
switch (setup->bRequest) {
case AUDIO_REQUEST_SET_CUR:
memcpy(&volume, *data, 2);
if (volume < 0x8000) {
volume_db = volume / 256;
} else {
volume_db = (volume - 0x10000) / 256;
}
USB_LOG_DBG("Set ep:0x%02x ch:%d vol_hex:0x%04x, vol_db:%d dB\r\n", ep, ch, volume, volume_db);
usbd_audio_set_volume(busid, ep, ch, volume_db);
break;
case AUDIO_REQUEST_GET_CUR:
volume_db = usbd_audio_get_volume(busid, ep, ch);
if (volume_db >= 0) {
volume = volume_db * 256;
} else {
volume = volume_db * 256 + 0x10000;
}
USB_LOG_DBG("Get ep:0x%02x ch:%d vol_hex:0x%04x, vol_db:%d dB\r\n", ep, ch, volume, volume_db);
memcpy(*data, &volume, 2);
*len = 2;
break;
case AUDIO_REQUEST_GET_MIN:
(*data)[0] = 0x00; /* -100 dB */
(*data)[1] = 0x9c;
*len = 2;
break;
case AUDIO_REQUEST_GET_MAX:
(*data)[0] = 0x00; /* 0 dB */
(*data)[1] = 0x00;
*len = 2;
break;
case AUDIO_REQUEST_GET_RES:
(*data)[0] = 0x00; /* 1 dB */
(*data)[1] = 0x01;
*len = 2;
break;
default:
return -1;
}
} else {
switch (setup->bRequest) {
case AUDIO_REQUEST_CUR:
if (setup->bmRequestType & USB_REQUEST_DIR_MASK) {
volume_db = usbd_audio_get_volume(busid, ep, ch);
if (volume_db >= 0) {
volume = volume_db * 256;
} else {
volume = volume_db * 256 + 0x10000;
}
USB_LOG_DBG("Get ep:0x%02x ch:%d vol_hex:0x%04x, vol_db:%d dB\r\n", ep, ch, volume, volume_db);
memcpy(*data, &volume, 2);
*len = 2;
} else {
memcpy(&volume, *data, 2);
if (volume < 0x8000) {
volume_db = volume / 256;
} else {
volume_db = (volume - 0x10000) / 256;
}
USB_LOG_DBG("Set ep:0x%02x ch:%d vol_hex:0x%04x, vol_db:%d dB\r\n", ep, ch, volume, volume_db);
usbd_audio_set_volume(busid, ep, ch, volume_db);
}
break;
case AUDIO_REQUEST_RANGE:
if (setup->bmRequestType & USB_REQUEST_DIR_MASK) {
*((uint16_t *)(*data + 0)) = 1;
*((uint16_t *)(*data + 2)) = 0x9c00; /* MIN -100 dB */
*((uint16_t *)(*data + 4)) = 0x0000; /* MAX 0 dB */
*((uint16_t *)(*data + 6)) = 0x100; /* RES 1 dB */
*len = 8;
} else {
}
break;
default:
return -1;
}
}
break;
default:
return -1;
}
break;
case AUDIO_CONTROL_CLOCK_SOURCE:
switch (control_selector) {
case AUDIO_CS_CONTROL_SAM_FREQ:
switch (setup->bRequest) {
case AUDIO_REQUEST_CUR:
if (setup->bmRequestType & USB_REQUEST_DIR_MASK) {
sampling_freq = usbd_audio_get_sampling_freq(busid, ep);
memcpy(*data, &sampling_freq, 4);
USB_LOG_DBG("Get ep:0x%02x %d Hz\r\n", ep, (int)sampling_freq);
*len = 4;
} else {
memcpy(&sampling_freq, *data, 4);
USB_LOG_DBG("Set ep:0x%02x %d Hz\r\n", ep, (int)sampling_freq);
usbd_audio_set_sampling_freq(busid, ep, sampling_freq);
}
break;
case AUDIO_REQUEST_RANGE:
if (setup->bmRequestType & USB_REQUEST_DIR_MASK) {
uint8_t *sampling_freq_table = NULL;
uint16_t num;
usbd_audio_get_sampling_freq_table(busid, ep, &sampling_freq_table);
num = (uint16_t)((uint16_t)(sampling_freq_table[1] << 8) | ((uint16_t)sampling_freq_table[0]));
memcpy(*data, sampling_freq_table, (12 * num + 2));
*len = (12 * num + 2);
} else {
}
break;
default:
return -1;
}
break;
case AUDIO_CS_CONTROL_CLOCK_VALID:
if (setup->bmRequestType & USB_REQUEST_DIR_MASK) {
(*data)[0] = 1;
*len = 1;
} else {
return -1;
}
break;
default:
return -1;
}
break;
default:
break;
}
return 0;
}
static void audio_notify_handler(uint8_t busid, uint8_t event, void *arg)
{
switch (event) {
case USBD_EVENT_RESET:
break;
case USBD_EVENT_SET_INTERFACE: {
struct usb_interface_descriptor *intf = (struct usb_interface_descriptor *)arg;
if (intf->bAlternateSetting) {
usbd_audio_open(busid, intf->bInterfaceNumber);
} else {
usbd_audio_close(busid, intf->bInterfaceNumber);
}
}
break;
default:
break;
}
}
struct usbd_interface *usbd_audio_init_intf(uint8_t busid,
struct usbd_interface *intf,
uint16_t uac_version,
struct audio_entity_info *table,
uint8_t num)
{
if (uac_version < 0x0200) {
intf->class_interface_handler = audio_class_interface_request_handler;
intf->class_endpoint_handler = audio_class_endpoint_request_handler;
intf->vendor_handler = NULL;
intf->notify_handler = audio_notify_handler;
} else {
intf->class_interface_handler = audio_class_interface_request_handler;
intf->class_endpoint_handler = NULL;
intf->vendor_handler = NULL;
intf->notify_handler = audio_notify_handler;
}
g_usbd_audio[busid].uac_version = uac_version;
g_usbd_audio[busid].table = table;
g_usbd_audio[busid].num = num;
return intf;
}
__WEAK void usbd_audio_set_volume(uint8_t busid, uint8_t ep, uint8_t ch, int volume_db)
{
(void)busid;
(void)ep;
(void)ch;
(void)volume_db;
}
__WEAK int usbd_audio_get_volume(uint8_t busid, uint8_t ep, uint8_t ch)
{
(void)busid;
(void)ep;
(void)ch;
return 0;
}
__WEAK void usbd_audio_set_mute(uint8_t busid, uint8_t ep, uint8_t ch, bool mute)
{
(void)busid;
(void)ep;
(void)ch;
(void)mute;
}
__WEAK bool usbd_audio_get_mute(uint8_t busid, uint8_t ep, uint8_t ch)
{
(void)busid;
(void)ep;
(void)ch;
return 0;
}
__WEAK void usbd_audio_set_sampling_freq(uint8_t busid, uint8_t ep, uint32_t sampling_freq)
{
(void)busid;
(void)ep;
(void)sampling_freq;
}
__WEAK uint32_t usbd_audio_get_sampling_freq(uint8_t busid, uint8_t ep)
{
(void)busid;
(void)ep;
return 0;
}
__WEAK void usbd_audio_get_sampling_freq_table(uint8_t busid, uint8_t ep, uint8_t **sampling_freq_table)
{
(void)busid;
(void)ep;
(void)sampling_freq_table;
}
__WEAK void usbd_audio_open(uint8_t busid, uint8_t intf)
{
(void)busid;
(void)intf;
}
__WEAK void usbd_audio_close(uint8_t busid, uint8_t intf)
{
(void)busid;
(void)intf;
}
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