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/*
* Copyright (c) 2024, sakumisu
*
* SPDX-License-Identifier: Apache-2.0
*/
#include "usbd_core.h"
#include "usb_midi.h"
#define MIDI_OUT_EP 0x02
#define MIDI_IN_EP 0x81
#define USBD_VID 0x0d28
#define USBD_PID 0x0404
#define USBD_MAX_POWER 100
#define USBD_LANGID_STRING 1033
#define AUDIO_AC_SIZ AUDIO_SIZEOF_AC_HEADER_DESC(1)
#define AUDIO_MS_SIZ (7 + MIDI_SIZEOF_JACK_DESC + 9 + 5 + 9 + 5)
#define USB_CONFIG_SIZE (unsigned long)(9 + \
AUDIO_AC_DESCRIPTOR_LEN(1) + \
MIDI_STANDARD_DESCRIPTOR_LEN + \
AUDIO_MS_SIZ)
#ifdef CONFIG_USB_HS
#define MIDI_EP_MPS 512
#else
#define MIDI_EP_MPS 64
#endif
static const uint8_t device_descriptor[] = {
USB_DEVICE_DESCRIPTOR_INIT(USB_2_0, 0x00, 0x00, 0x00, USBD_VID, USBD_PID, 0x0100, 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),
MIDI_STANDARD_DESCRIPTOR_INIT(0x01, 0x02),
MIDI_CS_HEADER_DESCRIPTOR_INIT(AUDIO_MS_SIZ),
MIDI_JACK_DESCRIPTOR_INIT(0x01),
// OUT endpoint descriptor
0x09, 0x05, MIDI_OUT_EP, 0x02, WBVAL(MIDI_EP_MPS), 0x00, 0x00, 0x00,
0x05, 0x25, 0x01, 0x01, 0x01,
// IN endpoint descriptor
0x09, 0x05, MIDI_IN_EP, 0x02, WBVAL(MIDI_EP_MPS), 0x00, 0x00, 0x00,
0x05, 0x25, 0x01, 0x01, 0x03
};
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 MIDI 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 midi_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
};
USB_NOCACHE_RAM_SECTION USB_MEM_ALIGNX uint8_t read_buffer[MIDI_EP_MPS];
USB_NOCACHE_RAM_SECTION USB_MEM_ALIGNX uint8_t write_buffer[MIDI_EP_MPS];
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:
usbd_ep_start_read(busid, MIDI_OUT_EP, read_buffer, MIDI_EP_MPS);
break;
case USBD_EVENT_SET_REMOTE_WAKEUP:
break;
case USBD_EVENT_CLR_REMOTE_WAKEUP:
break;
default:
break;
}
}
void usbd_midi_bulk_out(uint8_t busid, uint8_t ep, uint32_t nbytes)
{
usbd_ep_start_read(busid, MIDI_OUT_EP, read_buffer, MIDI_EP_MPS);
}
void usbd_midi_bulk_in(uint8_t busid, uint8_t ep, uint32_t nbytes)
{
}
struct usbd_interface intf0;
struct usbd_interface intf1;
struct usbd_endpoint midi_out_ep = {
.ep_addr = MIDI_OUT_EP,
.ep_cb = usbd_midi_bulk_out
};
struct usbd_endpoint midi_in_ep = {
.ep_addr = MIDI_IN_EP,
.ep_cb = usbd_midi_bulk_in
};
void midi_init(uint8_t busid, uintptr_t reg_base)
{
usbd_desc_register(busid, &midi_descriptor);
usbd_add_interface(busid, &intf0);
usbd_add_interface(busid, &intf1);
usbd_add_endpoint(busid, &midi_out_ep);
usbd_add_endpoint(busid, &midi_in_ep);
usbd_initialize(busid, reg_base, usbd_event_handler);
}
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