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/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2019 Damien P. George
* Copyright (c) 2022 Blake W. Felt & Angus Gratton
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "py/mpconfig.h"
#if MICROPY_HW_ENABLE_USBDEV
#include "tusb.h"
#include "mp_usbd.h"
#define USBD_CDC_CMD_MAX_SIZE (8)
#define USBD_CDC_IN_OUT_MAX_SIZE ((CFG_TUD_MAX_SPEED == OPT_MODE_HIGH_SPEED) ? 512 : 64)
#define USBD_MSC_IN_OUT_MAX_SIZE ((CFG_TUD_MAX_SPEED == OPT_MODE_HIGH_SPEED) ? 512 : 64)
const tusb_desc_device_t mp_usbd_builtin_desc_dev = {
.bLength = sizeof(tusb_desc_device_t),
.bDescriptorType = TUSB_DESC_DEVICE,
.bcdUSB = 0x0200,
.bDeviceClass = TUSB_CLASS_MISC,
.bDeviceSubClass = MISC_SUBCLASS_COMMON,
.bDeviceProtocol = MISC_PROTOCOL_IAD,
.bMaxPacketSize0 = CFG_TUD_ENDPOINT0_SIZE,
.idVendor = MICROPY_HW_USB_VID,
.idProduct = MICROPY_HW_USB_PID,
.bcdDevice = 0x0100,
.iManufacturer = USBD_STR_MANUF,
.iProduct = USBD_STR_PRODUCT,
.iSerialNumber = USBD_STR_SERIAL,
.bNumConfigurations = 1,
};
const uint8_t mp_usbd_builtin_desc_cfg[MP_USBD_BUILTIN_DESC_CFG_LEN] = {
TUD_CONFIG_DESCRIPTOR(1, USBD_ITF_BUILTIN_MAX, USBD_STR_0, MP_USBD_BUILTIN_DESC_CFG_LEN,
0, USBD_MAX_POWER_MA),
#if CFG_TUD_CDC
TUD_CDC_DESCRIPTOR(USBD_ITF_CDC, USBD_STR_CDC, USBD_CDC_EP_CMD,
USBD_CDC_CMD_MAX_SIZE, USBD_CDC_EP_OUT, USBD_CDC_EP_IN, USBD_CDC_IN_OUT_MAX_SIZE),
#endif
#if CFG_TUD_MSC
TUD_MSC_DESCRIPTOR(USBD_ITF_MSC, USBD_STR_MSC, EPNUM_MSC_OUT, EPNUM_MSC_IN, USBD_MSC_IN_OUT_MAX_SIZE),
#endif
};
const uint16_t *tud_descriptor_string_cb(uint8_t index, uint16_t langid) {
char serial_buf[MICROPY_HW_USB_DESC_STR_MAX + 1]; // Includes terminating NUL byte
static uint16_t desc_wstr[MICROPY_HW_USB_DESC_STR_MAX + 1]; // Includes prefix uint16_t
const char *desc_str = NULL;
uint16_t desc_len;
#if MICROPY_HW_ENABLE_USB_RUNTIME_DEVICE
desc_str = mp_usbd_runtime_string_cb(index);
#endif
if (index == 0) {
// String descriptor 0 is special, see USB 2.0 section 9.6.7 String
//
// Expect any runtime value in desc_str to be a fully formed descriptor
if (desc_str == NULL) {
desc_str = "\x04\x03\x09\x04"; // Descriptor for "English"
}
if (desc_str[0] < sizeof(desc_wstr)) {
memcpy(desc_wstr, desc_str, desc_str[0]);
return desc_wstr;
}
return NULL; // Descriptor length too long (or malformed), stall endpoint
}
// Otherwise, generate a "UNICODE" string descriptor from the C string
if (desc_str == NULL) {
// Fall back to the "static" string
switch (index) {
case USBD_STR_SERIAL:
mp_usbd_port_get_serial_number(serial_buf);
desc_str = serial_buf;
break;
case USBD_STR_MANUF:
desc_str = MICROPY_HW_USB_MANUFACTURER_STRING;
break;
case USBD_STR_PRODUCT:
desc_str = MICROPY_HW_USB_PRODUCT_FS_STRING;
break;
#if CFG_TUD_CDC
case USBD_STR_CDC:
desc_str = MICROPY_HW_USB_CDC_INTERFACE_STRING;
break;
#endif
#if CFG_TUD_MSC
case USBD_STR_MSC:
desc_str = MICROPY_HW_USB_MSC_INTERFACE_STRING;
break;
#endif
default:
break;
}
}
if (desc_str == NULL) {
return NULL; // No string, STALL the endpoint
}
// Convert from narrow string to wide string
desc_len = 2;
for (int i = 0; i < MICROPY_HW_USB_DESC_STR_MAX && desc_str[i] != 0; i++) {
desc_wstr[1 + i] = desc_str[i];
desc_len += 2;
}
// first byte is length (including header), second byte is string type
desc_wstr[0] = (TUSB_DESC_STRING << 8) | desc_len;
return desc_wstr;
}
#if !MICROPY_HW_ENABLE_USB_RUNTIME_DEVICE
const uint8_t *tud_descriptor_device_cb(void) {
return (const void *)&mp_usbd_builtin_desc_dev;
}
const uint8_t *tud_descriptor_configuration_cb(uint8_t index) {
(void)index;
return mp_usbd_builtin_desc_cfg;
}
#else
// If runtime device support is enabled, descriptor callbacks are implemented in usbd.c
#endif // !MICROPY_HW_ENABLE_USB_RUNTIME_DEVICE
#endif // MICROPY_HW_ENABLE_USBDEV
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