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/*
* Copyright (c) 2026, sakumisu
*
* SPDX-License-Identifier: Apache-2.0
*/
#include "usbd_core.h"
#include "usbd_display.h"
#define DISPLAY_IN_EP 0x81
#define DISPLAY_OUT_EP 0x02
#define USBD_VID 0x303A
#define USBD_PID 0x2987
#define USBD_MAX_POWER 100
#define USBD_LANGID_STRING 1033
#define USB_CONFIG_SIZE (9 + 9 + 7 + 7)
#ifdef CONFIG_USB_HS
#define DISPLAY_EP_MPS 512
#else
#define DISPLAY_EP_MPS 64
#endif
static const uint8_t device_descriptor[] = {
USB_DEVICE_DESCRIPTOR_INIT(USB_2_0, 0x00, 0x00, 0x00, USBD_VID, USBD_PID, 0x0101, 0x01)
};
static const uint8_t config_descriptor[] = {
USB_CONFIG_DESCRIPTOR_INIT(USB_CONFIG_SIZE, 0x01, 0x01, USB_CONFIG_BUS_POWERED, USBD_MAX_POWER),
USB_INTERFACE_DESCRIPTOR_INIT(0x00, 0x00, 0x02, 0xff, 0x00, 0x00, 0x00),
USB_ENDPOINT_DESCRIPTOR_INIT(DISPLAY_IN_EP, 0x02, DISPLAY_EP_MPS, 0x00),
USB_ENDPOINT_DESCRIPTOR_INIT(DISPLAY_OUT_EP, 0x02, DISPLAY_EP_MPS, 0x00),
};
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_R640x480_Ergb16_Fps30_Bl128", /* Product */
// "cherryusb_R640x480_Ejpg9_Fps30_Bl128", /* 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 usbdisplay_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 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;
}
}
struct usbd_interface intf0;
struct usbd_display_frame frame_pool[2];
USB_NOCACHE_RAM_SECTION USB_MEM_ALIGNX uint8_t usb_display_buffer[2][640 * 480 * 2];
void usbdisplay_init(uint8_t busid, uintptr_t reg_base)
{
frame_pool[0].frame_buf = usb_display_buffer[0];
frame_pool[0].frame_bufsize = 640 * 480 * 2;
frame_pool[1].frame_buf = usb_display_buffer[1];
frame_pool[1].frame_bufsize = 640 * 480 * 2;
usbd_desc_register(busid, &usbdisplay_descriptor);
usbd_add_interface(busid, usbd_display_init_intf(&intf0, DISPLAY_OUT_EP, DISPLAY_IN_EP, frame_pool, 2));
usbd_initialize(busid, reg_base, usbd_event_handler);
}
void usbdisplay_poll(void)
{
struct usbd_display_frame *frame;
int ret;
ret = usbd_display_dequeue(&frame, 0xffffffff); // timeout is not useful for baremental
if (ret < 0) {
return;
}
USB_LOG_INFO("frame type: %u, frame size %u\r\n", frame->frame_format, frame->frame_size);
usbd_display_enqueue(frame);
}
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