/* see flow chart in the usbmassbulk_10.pdf doc (page 15)
Returned values:
<0 Low-level USBD error.
0 = Command completed successfully.
1 = Command failed.
2 = Phase error.
*/
static int usb_bulk_manage_status(mass_dev* dev, unsigned int tag) {
int ret;
csw_packet csw;
//XPRINTF("USBHDFSD: usb_bulk_manage_status 1 ...\n");
ret = usb_bulk_status(dev, &csw, tag); /* Attempt to read CSW from bulk in endpoint */
if (ret != USB_RC_OK) { /* STALL bulk in -OR- Bulk error */
usb_bulk_clear_halt(dev, USB_BLK_EP_IN); /* clear the stall condition for bulk in */
XPRINTF("USBHDFSD: usb_bulk_manage_status error %d ...\n", ret);
ret = usb_bulk_status(dev, &csw, tag); /* Attempt to read CSW from bulk in endpoint */
}
/* CSW not valid or stalled or phase error */
if (ret != USB_RC_OK || csw.signature != CSW_TAG || csw.tag != tag || csw.status == 2) {
printf("USBHDFSD: usb_bulk_manage_status call reset recovery ...\n");
usb_bulk_reset(dev, 3); /* Perform reset recovery */
}
return((ret == USB_RC_OK && csw.signature == CSW_TAG && csw.tag == tag) ? csw.status : -1);
}
/* see flow chart in the usbmassbulk_10.pdf doc (page 15) */
int usb_bulk_manage_status(mass_dev* dev, int tag) {
int ret;
csw_packet csw;
//XPRINTF("USBHDFSD: usb_bulk_manage_status 1 ...\n");
ret = usb_bulk_status(dev, &csw, tag); /* Attempt to read CSW from bulk in endpoint */
if (ret < 0) { /* STALL bulk in -OR- Bulk error */
usb_bulk_clear_halt(dev, 0); /* clear the stall condition for bulk in */
XPRINTF("USBHDFSD: usb_bulk_manage_status stall ...\n");
ret = usb_bulk_status(dev, &csw, tag); /* Attempt to read CSW from bulk in endpoint */
}
/* CSW not valid or stalled or phase error */
if (csw.signature != CSW_TAG || csw.tag != tag || ret == 2) {
printf("USBHDFSD: usb_bulk_manage_status call reset recovery ...\n");
usb_bulk_reset(dev, 3); /* Perform reset recovery */
}
return ret;
}