mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-12-15 19:08:07 +00:00
96 lines
2.9 KiB
C
96 lines
2.9 KiB
C
/*
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* Copyright (c) 2016, Devan Lai
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*
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* Permission to use, copy, modify, and/or distribute this software
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* for any purpose with or without fee is hereby granted, provided
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* that the above copyright notice and this permission notice
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* appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
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* WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
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* AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR
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* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
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* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
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* NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
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* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include "usb21_standard.h"
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#include <stdint.h>
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#include <string.h>
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#include "random_delays.h"
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#include "util.h"
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static uint16_t build_bos_descriptor(const struct usb_bos_descriptor *bos,
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uint8_t *buf, uint16_t len) {
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uint8_t *tmpbuf = buf;
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uint16_t count = 0, total = 0, totallen = 0;
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uint16_t i = 0;
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memcpy(buf, bos, count = MIN(len, bos->bLength));
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buf += count;
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len -= count;
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total += count;
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totallen += bos->bLength;
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/* For each device capability */
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for (i = 0; i < bos->bNumDeviceCaps; i++) {
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/* Copy device capability descriptor. */
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const struct usb_device_capability_descriptor *cap = bos->capabilities[i];
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memcpy(buf, cap, count = MIN(len, cap->bLength));
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buf += count;
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len -= count;
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total += count;
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totallen += cap->bLength;
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}
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/* Fill in wTotalLength. */
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*(uint16_t *)(tmpbuf + 2) = totallen;
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return total;
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}
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static const struct usb_bos_descriptor *usb21_bos;
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static enum usbd_request_return_codes usb21_standard_get_descriptor(
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usbd_device *usbd_dev, struct usb_setup_data *req, uint8_t **buf,
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uint16_t *len, usbd_control_complete_callback *complete) {
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(void)complete;
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(void)usbd_dev;
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wait_random();
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if (req->bRequest == USB_REQ_GET_DESCRIPTOR) {
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int descr_type = req->wValue >> 8;
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if (descr_type == USB_DT_BOS) {
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if (!usb21_bos) {
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return USBD_REQ_NOTSUPP;
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}
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*len = MIN_8bits(*len, build_bos_descriptor(usb21_bos, *buf, *len));
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return USBD_REQ_HANDLED;
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}
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}
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return USBD_REQ_NEXT_CALLBACK;
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}
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static void usb21_set_config(usbd_device *usbd_dev, uint16_t wValue) {
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(void)wValue;
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usbd_register_control_callback(
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usbd_dev, USB_REQ_TYPE_IN | USB_REQ_TYPE_STANDARD | USB_REQ_TYPE_DEVICE,
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USB_REQ_TYPE_DIRECTION | USB_REQ_TYPE_TYPE | USB_REQ_TYPE_RECIPIENT,
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&usb21_standard_get_descriptor);
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}
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void usb21_setup(usbd_device *usbd_dev,
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const struct usb_bos_descriptor *binary_object_store) {
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usb21_bos = binary_object_store;
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/* Register the control request handler _before_ the config is set */
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usb21_set_config(usbd_dev, 0x0000);
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usbd_register_set_config_callback(usbd_dev, usb21_set_config);
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}
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