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trezorhal/usb: handle additional setup packets

This commit is contained in:
Jan Pochyla 2017-05-24 13:49:11 +02:00
parent ecd5fd858b
commit 13a91451f6
1 changed files with 21 additions and 10 deletions
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19
micropython/trezorhal/usb_vcp-impl.h
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@ -33,7 +33,9 @@
#define USB_D2H 0x80
// Class-Specific Request Codes for PSTN subclasses
#define USB_CDC_SET_LINE_CODING 0x20
#define USB_CDC_GET_LINE_CODING 0x21
#define USB_CDC_SET_CONTROL_LINE_STATE 0x22
// Maximal length of packets on IN CMD EP
#define USB_CDC_MAX_CMD_PACKET_LEN 0x08
@ -347,19 +349,27 @@ static int usb_vcp_class_setup(USBD_HandleTypeDef *dev, usb_vcp_state_t *state,
.bDataBits = 8,
};
switch (req->bmRequest & USB_REQ_TYPE_MASK) {
// TODO: make cmd buffer part of interface state
static uint8_t cmd_buffer[USB_CDC_MAX_CMD_PACKET_LEN];
if ((req->bmRequest & USB_REQ_TYPE_MASK) != USB_REQ_TYPE_CLASS) {
return USBD_OK;
}
case USB_REQ_TYPE_CLASS:
switch (req->bmRequest & USB_REQ_DIR_MASK) {
case USB_D2H:
switch (req->bRequest) {
case USB_CDC_GET_LINE_CODING:
USBD_CtlSendData(dev, (uint8_t *)(&line_coding), MIN(req->wLength, sizeof(line_coding)));
break;
default:
USBD_CtlSendData(dev, cmd_buffer, MIN(req->wLength, sizeof(cmd_buffer)));
break;
}
break;
case USB_H2D:
if (req->wLength > 0) {
USBD_CtlPrepareRx(dev, cmd_buffer, MIN(req->wLength, sizeof(cmd_buffer)));
}
break;
}
@ -411,6 +421,7 @@ static uint8_t usb_vcp_class_sof(USBD_HandleTypeDef *dev, usb_vcp_state_t *state
// We avoid sending full packets as they stall the hosts pipeline, see:
// <http://www.cypress.com/?id=4&rID=92719>
size_t len = state->max_packet_len - 1;
size_t mask = b->cap - 1;
size_t i;
for (i = 0; (i < len) && !ring_empty(b); i++) {
buf[i] = b->buf[b->read & mask];