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Fix communications failures on USB suspend. (#97)

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Linux issues a `GET_STATUS` request to validate that a USB device has
correctly resumed after an idle suspend; but HackRF has thus far not
implemented `GET_STATUS`. As a result, Linux assumes our USB devices
are failing to resume, and winds up resetting them. Oops. ^-^
This commit is contained in:
Kate J. Temkin
2019-01-03 06:08:21 -07:00
committed by Dominic Spill
parent 454e32b8c8
commit 73b5089581
1 changed files with 37 additions and 0 deletions
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37
firmware/common/usb_standard_request.c
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@ -337,6 +337,40 @@ static usb_request_status_t usb_standard_request_get_configuration(
} }
} }
static usb_request_status_t usb_standard_request_get_status_setup(
usb_endpoint_t* const endpoint
) {
if( endpoint->setup.length == 2 ) {
endpoint->buffer[0] = 0;
endpoint->buffer[1] = 0;
usb_transfer_schedule_block(endpoint->in, &endpoint->buffer, 2, NULL, NULL);
usb_transfer_schedule_ack(endpoint->out);
return USB_REQUEST_STATUS_OK;
} else {
return USB_REQUEST_STATUS_STALL;
}
}
static usb_request_status_t usb_standard_request_get_status(
usb_endpoint_t* const endpoint,
const usb_transfer_stage_t stage
) {
switch( stage ) {
case USB_TRANSFER_STAGE_SETUP:
return usb_standard_request_get_status_setup(endpoint);
case USB_TRANSFER_STAGE_DATA:
case USB_TRANSFER_STAGE_STATUS:
return USB_REQUEST_STATUS_OK;
default:
return USB_REQUEST_STATUS_STALL;
}
}
/*********************************************************************/ /*********************************************************************/
usb_request_status_t usb_standard_request( usb_request_status_t usb_standard_request(
@ -344,6 +378,9 @@ usb_request_status_t usb_standard_request(
const usb_transfer_stage_t stage const usb_transfer_stage_t stage
) { ) {
switch( endpoint->setup.request ) { switch( endpoint->setup.request ) {
case USB_STANDARD_REQUEST_GET_STATUS:
return usb_standard_request_get_status(endpoint, stage);
case USB_STANDARD_REQUEST_GET_DESCRIPTOR: case USB_STANDARD_REQUEST_GET_DESCRIPTOR:
return usb_standard_request_get_descriptor(endpoint, stage); return usb_standard_request_get_descriptor(endpoint, stage);