/**
* \brief Device enumeration step 5
* Requests the USB device descriptor.
* This setup request can be aborted
* because the control endpoint size is unknown.
*/
static void uhc_enumeration_step5(void)
{
usb_setup_req_t req;
req.bmRequestType = USB_REQ_RECIP_DEVICE|USB_REQ_TYPE_STANDARD|USB_REQ_DIR_IN;
req.bRequest = USB_REQ_GET_DESCRIPTOR;
req.wValue = (USB_DT_DEVICE << 8);
req.wIndex = 0;
req.wLength = offsetof(uhc_device_t, dev_desc.bMaxPacketSize0)
+ sizeof(uhc_dev_enum->dev_desc.bMaxPacketSize0);
// After a USB reset, the reallocation is required
uhd_ep_free(0, 0);
if (!uhd_ep0_alloc(0, 64)) {
uhc_enumeration_error(UHC_ENUM_HARDWARE_LIMIT);
return;
}
if (!uhd_setup_request(0,
&req,
(uint8_t*)&uhc_dev_enum->dev_desc,
sizeof(usb_dev_desc_t),
NULL,
uhc_enumeration_step6)) {
uhc_enumeration_error(UHC_ENUM_MEMORY_LIMIT);
return;
}
}
/**
* \brief Device enumeration step 11
* Updates USB host pipe with the new USB address.
* Requests a complete USB device descriptor.
*/
static void uhc_enumeration_step11(void)
{
usb_setup_req_t req;
// Free address 0 used to start enumeration
uhd_ep_free(0, 0);
// Alloc control endpoint with the new USB address
if (!uhd_ep0_alloc(UHC_DEVICE_ENUM_ADD,
uhc_dev_enum->dev_desc.bMaxPacketSize0)) {
uhc_enumeration_error(UHC_ENUM_HARDWARE_LIMIT);
return;
}
// Send USB device descriptor request
req.bmRequestType = USB_REQ_RECIP_DEVICE|USB_REQ_TYPE_STANDARD|USB_REQ_DIR_IN;
req.bRequest = USB_REQ_GET_DESCRIPTOR;
req.wValue = (USB_DT_DEVICE << 8);
req.wIndex = 0;
req.wLength = sizeof(usb_dev_desc_t);
if (!uhd_setup_request(UHC_DEVICE_ENUM_ADD,
&req,
(uint8_t *) & uhc_dev_enum->dev_desc,
sizeof(usb_dev_desc_t),
NULL, uhc_enumeration_step12)) {
uhc_enumeration_error(UHC_ENUM_MEMORY_LIMIT);
return;
}
}
/**
* \brief Device enumeration step 9
* Send a Set address setup request.
*/
static void uhc_enumeration_step9(void)
{
usb_setup_req_t req;
req.bmRequestType = USB_REQ_RECIP_DEVICE
| USB_REQ_TYPE_STANDARD | USB_REQ_DIR_OUT;
req.bRequest = USB_REQ_SET_ADDRESS;
#ifdef USB_HOST_HUB_SUPPORT
uint8_t usb_addr_free = 0;
uhc_device_t *dev;
// Search free address
dev = &g_uhc_device_root;
while (usb_addr_free++) {
if (dev->address == usb_addr_free) {
continue;
}
if (dev->next != NULL) {
dev = dev->next;
continue;
}
break;
}
req.wValue = usb_addr_free;
uhc_dev_enum->address = usb_addr_free;
#else
req.wValue = UHC_DEVICE_ENUM_ADD;
uhc_dev_enum->address = UHC_DEVICE_ENUM_ADD;
#endif
req.wIndex = 0;
req.wLength = 0;
// After a USB reset, the reallocation is required
uhd_ep_free(0, 0);
if (!uhd_ep0_alloc(0, uhc_dev_enum->dev_desc.bMaxPacketSize0)) {
uhc_enumeration_error(UHC_ENUM_HARDWARE_LIMIT);
return;
}
if (!uhd_setup_request(0,
&req,
(uint8_t*)&uhc_dev_enum->dev_desc,
sizeof(usb_dev_desc_t),
NULL,
uhc_enumeration_step10)) {
uhc_enumeration_error(UHC_ENUM_MEMORY_LIMIT);
return;
}
}