mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-11-25 08:58:14 +00:00
95 lines
2.9 KiB
C
95 lines
2.9 KiB
C
/*
|
|
* Copyright (c) 2016, Devan Lai
|
|
*
|
|
* Permission to use, copy, modify, and/or distribute this software
|
|
* for any purpose with or without fee is hereby granted, provided
|
|
* that the above copyright notice and this permission notice
|
|
* appear in all copies.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
|
|
* WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
|
|
* WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
|
|
* AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR
|
|
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
|
|
* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
|
|
* NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
|
|
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|
*/
|
|
|
|
#include "usb21_standard.h"
|
|
#include <stdint.h>
|
|
#include <string.h>
|
|
#include "util.h"
|
|
|
|
static uint16_t build_bos_descriptor(const struct usb_bos_descriptor *bos,
|
|
uint8_t *buf, uint16_t len) {
|
|
uint8_t *tmpbuf = buf;
|
|
uint16_t count, total = 0, totallen = 0;
|
|
uint16_t i;
|
|
|
|
memcpy(buf, bos, count = MIN(len, bos->bLength));
|
|
buf += count;
|
|
len -= count;
|
|
total += count;
|
|
totallen += bos->bLength;
|
|
|
|
/* For each device capability */
|
|
for (i = 0; i < bos->bNumDeviceCaps; i++) {
|
|
/* Copy device capability descriptor. */
|
|
const struct usb_device_capability_descriptor *cap = bos->capabilities[i];
|
|
|
|
memcpy(buf, cap, count = MIN(len, cap->bLength));
|
|
buf += count;
|
|
len -= count;
|
|
total += count;
|
|
totallen += cap->bLength;
|
|
}
|
|
|
|
/* Fill in wTotalLength. */
|
|
*(uint16_t *)(tmpbuf + 2) = totallen;
|
|
|
|
return total;
|
|
}
|
|
|
|
static const struct usb_bos_descriptor *usb21_bos;
|
|
|
|
static enum usbd_request_return_codes usb21_standard_get_descriptor(
|
|
usbd_device *usbd_dev, struct usb_setup_data *req, uint8_t **buf,
|
|
uint16_t *len, usbd_control_complete_callback *complete) {
|
|
(void)complete;
|
|
(void)usbd_dev;
|
|
|
|
wait_random();
|
|
|
|
if (req->bRequest == USB_REQ_GET_DESCRIPTOR) {
|
|
int descr_type = req->wValue >> 8;
|
|
if (descr_type == USB_DT_BOS) {
|
|
if (!usb21_bos) {
|
|
return USBD_REQ_NOTSUPP;
|
|
}
|
|
*len = MIN_8bits(*len, build_bos_descriptor(usb21_bos, *buf, *len));
|
|
return USBD_REQ_HANDLED;
|
|
}
|
|
}
|
|
|
|
return USBD_REQ_NEXT_CALLBACK;
|
|
}
|
|
|
|
static void usb21_set_config(usbd_device *usbd_dev, uint16_t wValue) {
|
|
(void)wValue;
|
|
|
|
usbd_register_control_callback(
|
|
usbd_dev, USB_REQ_TYPE_IN | USB_REQ_TYPE_STANDARD | USB_REQ_TYPE_DEVICE,
|
|
USB_REQ_TYPE_DIRECTION | USB_REQ_TYPE_TYPE | USB_REQ_TYPE_RECIPIENT,
|
|
&usb21_standard_get_descriptor);
|
|
}
|
|
|
|
void usb21_setup(usbd_device *usbd_dev,
|
|
const struct usb_bos_descriptor *binary_object_store) {
|
|
usb21_bos = binary_object_store;
|
|
|
|
/* Register the control request handler _before_ the config is set */
|
|
usb21_set_config(usbd_dev, 0x0000);
|
|
usbd_register_set_config_callback(usbd_dev, usb21_set_config);
|
|
}
|