static void setup_received(void)
{
static uint32_t setup_data[2];
/* copy setup data from packet */
setup_data[0] = SETUP1;
setup_data[1] = SETUP2;
/* clear all pending control transfers
* do we need this here?
*/
/* pass setup data to the upper layer */
usb_core_control_request((struct usb_ctrlrequest*)setup_data);
}
/* IRQ handler */
void INT_USB_FUNC(void)
{
int i;
uint32_t ints = GINTSTS;
uint32_t epints;
if (ints & 0x1000) /* bus reset */
{
DCFG = 4; /* Address 0 */
reset_endpoints(1);
usb_core_bus_reset();
}
if (ints & 0x2000) /* enumeration done, we now know the speed */
{
/* Set up the maximum packet sizes accordingly */
uint32_t maxpacket = usb_drv_port_speed() ? 512 : 64;
DIEPCTL1 = (DIEPCTL1 & ~0x000003FF) | maxpacket;
DOEPCTL2 = (DOEPCTL2 & ~0x000003FF) | maxpacket;
DIEPCTL3 = (DIEPCTL3 & ~0x000003FF) | maxpacket;
DOEPCTL4 = (DOEPCTL4 & ~0x000003FF) | maxpacket;
}
if (ints & 0x40000) /* IN EP event */
for (i = 0; i < 4; i += i + 1) // 0, 1, 3
if ((epints = DIEPINT(i)))
{
if (epints & 1) /* Transfer completed */
{
invalidate_dcache();
int bytes = endpoints[i].size - (DIEPTSIZ(i) & 0x3FFFF);
if (endpoints[i].busy)
{
endpoints[i].busy = false;
endpoints[i].rc = 0;
endpoints[i].done = true;
usb_core_transfer_complete(i, USB_DIR_IN, 0, bytes);
semaphore_release(&endpoints[i].complete);
}
}
if (epints & 4) /* AHB error */
panicf("USB: AHB error on IN EP%d", i);
if (epints & 8) /* Timeout */
{
if (endpoints[i].busy)
{
endpoints[i].busy = false;
endpoints[i].rc = 1;
endpoints[i].done = true;
semaphore_release(&endpoints[i].complete);
}
}
DIEPINT(i) = epints;
}
if (ints & 0x80000) /* OUT EP event */
for (i = 0; i < USB_NUM_ENDPOINTS; i += 2)
if ((epints = DOEPINT(i)))
{
if (epints & 1) /* Transfer completed */
{
invalidate_dcache();
int bytes = endpoints[i].size - (DOEPTSIZ(i) & 0x3FFFF);
if (endpoints[i].busy)
{
endpoints[i].busy = false;
endpoints[i].rc = 0;
endpoints[i].done = true;
usb_core_transfer_complete(i, USB_DIR_OUT, 0, bytes);
semaphore_release(&endpoints[i].complete);
}
}
if (epints & 4) /* AHB error */
panicf("USB: AHB error on OUT EP%d", i);
if (epints & 8) /* SETUP phase done */
{
invalidate_dcache();
if (i == 0)
{
if (ctrlreq.bRequest == 5)
{
/* Already set the new address here,
before passing the packet to the core.
See below (usb_drv_set_address) for details. */
DCFG = (DCFG & ~0x7F0) | (ctrlreq.wValue << 4);
}
usb_core_control_request(&ctrlreq);
}
else panicf("USB: SETUP done on OUT EP%d!?", i);
}
/* Make sure EP0 OUT is set up to accept the next request */
if (!i)
{
DOEPTSIZ0 = 0x20080040;
DOEPDMA0 = &ctrlreq;
DOEPCTL0 |= 0x84000000;
}
DOEPINT(i) = epints;
}
GINTSTS = ints;
}
static void handle_ep_int(int ep, bool out)
{
unsigned long sts = DEPINT(ep, out);
struct ep_type *endpoint = &endpoints[ep][out ? DIR_OUT : DIR_IN];
logf("%s(%d %s): sts = 0x%lx", __func__, ep, out?"OUT":"IN", sts);
if(sts & DEPINT_ahberr)
panicf("usb-drv: ahb error on EP%d %s", ep, out ? "OUT" : "IN");
if(sts & DEPINT_xfercompl)
{
discard_dma_buffer_cache();
if(endpoint->busy)
{
endpoint->busy = false;
endpoint->status = 0;
/* works even for EP0 */
int size = (DEPTSIZ(ep, out) & DEPTSIZ_xfersize_bits);
int transfered = endpoint->size - size;
if(ep == 0)
{
bool is_ack = endpoint->size == 0;
switch(ep0_state)
{
case EP0_WAIT_SETUP:
panicf("usb-drv: EP0 completion while waiting for SETUP");
case EP0_WAIT_DATA_ACK:
ep0_state = is_ack ? EP0_WAIT_DATA : EP0_WAIT_ACK;
break;
case EP0_WAIT_ACK:
case EP0_WAIT_DATA:
if((!is_ack && ep0_state == EP0_WAIT_ACK) || (is_ack && ep0_state == EP0_WAIT_DATA))
panicf("usb-drv: bad EP0 state");
prepare_setup_ep0();
break;
}
}
if (!out)
endpoint->size = size;
usb_core_transfer_complete(ep, out ? USB_DIR_OUT : USB_DIR_IN, 0, transfered);
endpoint->done = true;
semaphore_release(&endpoint->complete);
}
}
if(!out && (sts & DIEPINT_timeout)) {
if (endpoint->busy)
{
endpoint->busy = false;
endpoint->status = 1;
endpoint->done = true;
semaphore_release(&endpoint->complete);
}
}
if(out && (sts & DOEPINT_setup))
{
discard_dma_buffer_cache();
if(ep != 0)
panicf("usb-drv: setup not on EP0, this is impossible");
if((DEPTSIZ(ep, true) & DEPTSIZ_xfersize_bits) != 0)
{
logf("usb-drv: ignore spurious setup (xfersize=%ld)", DOEPTSIZ(ep) & DEPTSIZ_xfersize_bits);
prepare_setup_ep0();
}
else
{
if(ep0_state == EP0_WAIT_SETUP)
{
bool data_phase = ep0_setup_pkt->wLength != 0;
ep0_state = data_phase ? EP0_WAIT_DATA_ACK : EP0_WAIT_ACK;
}
logf(" rt=%x r=%x", ep0_setup_pkt->bRequestType, ep0_setup_pkt->bRequest);
if(ep0_setup_pkt->bRequestType == USB_TYPE_STANDARD &&
ep0_setup_pkt->bRequest == USB_REQ_SET_ADDRESS)
DCFG = (DCFG & ~bitm(DCFG, devadr)) | (ep0_setup_pkt->wValue << DCFG_devadr_bitp);
usb_core_control_request(ep0_setup_pkt);
}
}
DEPINT(ep, out) = sts;
}
