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jz4760: Lots of stability fixes to the USB driver.

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It actually works for transferring data now!

Igor Poretsky gets full credit for this patch.

Change-Id: I247c70fdf45e590b4699b9b8668bbdab7bc3ef03
This commit is contained in:
Solomon Peachy 2018-09-20 16:14:36 -04:00
parent a26c1c1459
commit a454b7f9ef
2 changed files with 294 additions and 85 deletions
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1
docs/CREDITS
View file

@ -666,6 +666,7 @@ Alessandro Stoppani
Alexander Yurenin Alexander Yurenin
Roman Stolyarov Roman Stolyarov
Solomon Peachy Solomon Peachy
Igor Poretsky
The libmad team The libmad team
The wavpack team The wavpack team

334
firmware/target/mips/ingenic_jz47xx/usb-jz4760.c
View file

@ -53,14 +53,14 @@ enum ep_type
struct usb_endpoint struct usb_endpoint
{ {
void *buf; volatile void *buf;
size_t length; volatile size_t length;
union union
{ {
size_t sent; volatile size_t sent;
size_t received; volatile size_t received;
}; };
bool busy; volatile bool busy;
const enum ep_type type; const enum ep_type type;
const bool use_dma; const bool use_dma;
@ -68,23 +68,35 @@ struct usb_endpoint
const long fifo_addr; const long fifo_addr;
unsigned short fifo_size; unsigned short fifo_size;
bool wait; volatile bool wait;
struct semaphore complete; struct semaphore complete;
volatile int rc;
bool allocated;
}; };
#define EP_INIT(_type, _fifo_addr, _fifo_size, _buf, _use_dma) \ #define EP_INIT(_type, _fifo_addr, _fifo_size, _buf, _use_dma) \
{ .type = (_type), .fifo_addr = (_fifo_addr), .fifo_size = (_fifo_size), \ { .type = (_type), .fifo_addr = (_fifo_addr), .fifo_size = (_fifo_size), \
.buf = (_buf), .use_dma = (_use_dma), .length = 0, .busy = false, .wait = false } .buf = (_buf), .use_dma = (_use_dma), \
.length = 0, .busy = false, .wait = false, .allocated = false }
static union
{
int buf[64 / sizeof(int)];
struct usb_ctrlrequest request;
} ep0_rx;
static volatile bool ep0_data_supplied = false;
static volatile bool ep0_data_requested = false;
static unsigned char ep0_rx_buf[64];
static struct usb_endpoint endpoints[] = static struct usb_endpoint endpoints[] =
{ {
EP_INIT(ep_control, USB_FIFO_EP(0), 64, NULL, false), EP_INIT(ep_control, USB_FIFO_EP(0), 64, NULL, false),
EP_INIT(ep_control, USB_FIFO_EP(0), 64, &ep0_rx_buf, false), EP_INIT(ep_control, USB_FIFO_EP(0), 64, &ep0_rx.buf, false),
EP_INIT(ep_bulk, USB_FIFO_EP(1), 512, NULL, false), EP_INIT(ep_bulk, USB_FIFO_EP(1), 512, NULL, false),
EP_INIT(ep_bulk, USB_FIFO_EP(1), 512, NULL, false), EP_INIT(ep_bulk, USB_FIFO_EP(1), 512, NULL, false),
EP_INIT(ep_interrupt, USB_FIFO_EP(2), 64, NULL, false), EP_INIT(ep_interrupt, USB_FIFO_EP(2), 512, NULL, false),
EP_INIT(ep_interrupt, USB_FIFO_EP(2), 64, NULL, false), EP_INIT(ep_interrupt, USB_FIFO_EP(2), 512, NULL, false),
}; };
static inline void select_endpoint(int ep) static inline void select_endpoint(int ep)
@ -133,16 +145,32 @@ static void writeFIFO(struct usb_endpoint *ep, size_t size)
logf("%s(EP%d, %d)", __func__, EP_NUMBER2(ep), size); logf("%s(EP%d, %d)", __func__, EP_NUMBER2(ep), size);
register unsigned int *d32 = (unsigned int *)EP_PTR(ep); register unsigned int *d32 = (unsigned int *)EP_PTR(ep);
register unsigned char *d8 = (unsigned char *)d32;
register size_t s = size >> 2; register size_t s = size >> 2;
register unsigned int x;
if(size > 0) if(size > 0)
{
if( ((unsigned int)d8 & 3) == 0 )
{ {
while (s--) while (s--)
REG32(ep->fifo_addr) = *d32++; REG32(ep->fifo_addr) = *d32++;
d8 = (unsigned char *)d32;
}
else
{
while (s--)
{
x = (unsigned int)(*d8++) & 0xff;
x |= ((unsigned int)(*d8++) & 0xff) << 8;
x |= ((unsigned int)(*d8++) & 0xff) << 16;
x |= ((unsigned int)(*d8++) & 0xff) << 24;
REG32(ep->fifo_addr) = x;
}
}
if( (s = size & 3) ) if( (s = size & 3) )
{ {
register unsigned char *d8 = (unsigned char *)d32;
while (s--) while (s--)
REG8(ep->fifo_addr) = *d8++; REG8(ep->fifo_addr) = *d8++;
} }
@ -183,13 +211,16 @@ static void EP0_send(void)
{ {
struct usb_endpoint* ep = &endpoints[0]; struct usb_endpoint* ep = &endpoints[0];
unsigned int length; unsigned int length;
unsigned char csr0; unsigned short csr0;
select_endpoint(0); select_endpoint(0);
csr0 = REG_USB_CSR0; csr0 = REG_USB_CSR0;
if(ep->sent == 0) if(ep->sent == 0)
{
length = MIN(ep->length, ep->fifo_size); length = MIN(ep->length, ep->fifo_size);
REG_USB_CSR0 = (csr0 | USB_CSR0_FLUSHFIFO);
}
else else
length = MIN(EP_BUF_LEFT(ep), ep->fifo_size); length = MIN(EP_BUF_LEFT(ep), ep->fifo_size);
@ -199,7 +230,9 @@ static void EP0_send(void)
if(ep->sent >= ep->length) if(ep->sent >= ep->length)
{ {
REG_USB_CSR0 = (csr0 | USB_CSR0_INPKTRDY | USB_CSR0_DATAEND); /* Set data end! */ REG_USB_CSR0 = (csr0 | USB_CSR0_INPKTRDY | USB_CSR0_DATAEND); /* Set data end! */
if (!ep->wait)
usb_core_transfer_complete(0, USB_DIR_IN, 0, ep->sent); usb_core_transfer_complete(0, USB_DIR_IN, 0, ep->sent);
ep->rc = 0;
ep_transfer_completed(ep); ep_transfer_completed(ep);
} }
else else
@ -208,9 +241,7 @@ static void EP0_send(void)
static void EP0_handler(void) static void EP0_handler(void)
{ {
logf("%s()", __func__); unsigned short csr0;
unsigned char csr0;
struct usb_endpoint *ep_send = &endpoints[0]; struct usb_endpoint *ep_send = &endpoints[0];
struct usb_endpoint *ep_recv = &endpoints[1]; struct usb_endpoint *ep_recv = &endpoints[1];
@ -218,6 +249,8 @@ static void EP0_handler(void)
select_endpoint(0); select_endpoint(0);
csr0 = REG_USB_CSR0; csr0 = REG_USB_CSR0;
logf("%s(): 0x%x", __func__, csr0);
/* Check for SentStall: /* Check for SentStall:
This bit is set when a STALL handshake is transmitted. The CPU should clear this bit. This bit is set when a STALL handshake is transmitted. The CPU should clear this bit.
*/ */
@ -234,19 +267,66 @@ static void EP0_handler(void)
*/ */
if(csr0 & USB_CSR0_SETUPEND) if(csr0 & USB_CSR0_SETUPEND)
{ {
REG_USB_CSR0 = csr0 | USB_CSR0_SVDSETUPEND; csr0 |= USB_CSR0_SVDSETUPEND;
return; REG_USB_CSR0 = csr0;
ep0_data_supplied = false;
ep0_data_requested = false;
if (ep_send->busy)
{
if (!ep_send->wait)
usb_core_transfer_complete(0, USB_DIR_IN, -1, 0);
ep_transfer_completed(ep_send);
}
if (ep_recv->busy)
{
usb_core_transfer_complete(0, USB_DIR_OUT, -1, 0);
ep_transfer_completed(ep_recv);
}
} }
/* Call relevant routines for endpoint 0 state */ /* Call relevant routines for endpoint 0 state */
if(ep_send->busy) if(csr0 & USB_CSR0_OUTPKTRDY) /* There is a packet in the fifo */
EP0_send();
else if(csr0 & USB_CSR0_OUTPKTRDY) /* There is a packet in the fifo */
{ {
readFIFO(ep_recv, REG_USB_COUNT0); if (ep_send->busy)
REG_USB_CSR0 = csr0 | USB_CSR0_SVDOUTPKTRDY; /* clear OUTPKTRDY bit */ {
usb_core_control_request((struct usb_ctrlrequest*)ep_recv->buf); if (!ep_send->wait)
usb_core_transfer_complete(0, USB_DIR_IN, -1, 0);
ep_transfer_completed(ep_send);
} }
if (ep_recv->busy && ep_recv->buf && ep_recv->length)
{
unsigned int size = REG_USB_COUNT0;
readFIFO(ep_recv, size);
ep_recv->received += size;
if (size < ep_recv->fifo_size || ep_recv->received >= ep_recv->length)
{
REG_USB_CSR0 = csr0 | USB_CSR0_SVDOUTPKTRDY | USB_CSR0_DATAEND; /* Set data end! */
usb_core_transfer_complete(0, USB_DIR_OUT, 0, ep_recv->received);
ep_transfer_completed(ep_recv);
}
else REG_USB_CSR0 = csr0 | USB_CSR0_SVDOUTPKTRDY; /* clear OUTPKTRDY bit */
}
else if (!ep0_data_supplied)
{
ep_recv->buf = ep0_rx.buf;
readFIFO(ep_recv, REG_USB_COUNT0);
csr0 |= USB_CSR0_SVDOUTPKTRDY;
if (!ep0_rx.request.wLength)
{
csr0 |= USB_CSR0_DATAEND; /* Set data end! */
ep0_data_requested = false;
ep0_data_supplied = false;
}
else if (ep0_rx.request.bRequestType & USB_DIR_IN)
ep0_data_requested = true;
else ep0_data_supplied = true;
REG_USB_CSR0 = csr0;
usb_core_control_request(&ep0_rx.request);
ep_transfer_completed(ep_recv);
}
}
else if (ep_send->busy)
EP0_send();
} }
static void EPIN_handler(unsigned int endpoint) static void EPIN_handler(unsigned int endpoint)
@ -292,7 +372,9 @@ static void EPIN_handler(unsigned int endpoint)
if(ep->sent >= ep->length) if(ep->sent >= ep->length)
{ {
if (!ep->wait)
usb_core_transfer_complete(endpoint, USB_DIR_IN, 0, ep->sent); usb_core_transfer_complete(endpoint, USB_DIR_IN, 0, ep->sent);
ep->rc = 0;
ep_transfer_completed(ep); ep_transfer_completed(ep);
logf("sent complete"); logf("sent complete");
} }
@ -352,19 +434,22 @@ static void EPDMA_handler(int number)
{ {
int endpoint = -1; int endpoint = -1;
unsigned int size = 0; unsigned int size = 0;
struct usb_endpoint* ep = NULL;
if(number == USB_INTR_DMA_BULKIN) if(number == USB_INTR_DMA_BULKIN)
{
endpoint = (REG_USB_CNTL(0) >> 4) & 0xF; endpoint = (REG_USB_CNTL(0) >> 4) & 0xF;
else if(number == USB_INTR_DMA_BULKOUT) ep = &endpoints[endpoint*2];
endpoint = (REG_USB_CNTL(1) >> 4) & 0xF;
struct usb_endpoint* ep = &endpoints[endpoint];
logf("DMA_BULK%d %d", number, endpoint);
if(number == USB_INTR_DMA_BULKIN)
size = (unsigned int)ep->buf - REG_USB_ADDR(0); size = (unsigned int)ep->buf - REG_USB_ADDR(0);
}
else if(number == USB_INTR_DMA_BULKOUT) else if(number == USB_INTR_DMA_BULKOUT)
{
endpoint = (REG_USB_CNTL(1) >> 4) & 0xF;
ep = &endpoints[endpoint*2+1];
size = (unsigned int)ep->buf - REG_USB_ADDR(1); size = (unsigned int)ep->buf - REG_USB_ADDR(1);
}
logf("DMA_BULK%d %d", number, endpoint);
if(number == USB_INTR_DMA_BULKOUT) if(number == USB_INTR_DMA_BULKOUT)
{ {
@ -389,29 +474,41 @@ static void EPDMA_handler(int number)
REG_USB_INCSR |= USB_INCSR_INPKTRDY; REG_USB_INCSR |= USB_INCSR_INPKTRDY;
} }
usb_core_transfer_complete(endpoint, EP_IS_IN(ep) ? USB_DIR_IN : USB_DIR_OUT, if (ep)
0, ep->length); {
int dir = EP_IS_IN(ep) ? USB_DIR_IN : USB_DIR_OUT;
if ((dir == USB_DIR_OUT) || !ep->wait)
usb_core_transfer_complete(endpoint, dir, 0, ep->length);
ep->rc = 0;
ep_transfer_completed(ep); ep_transfer_completed(ep);
} }
}
static void setup_endpoint(struct usb_endpoint *ep) static void setup_endpoint(struct usb_endpoint *ep)
{ {
int csr, csrh; int endpoint = EP_NUMBER2(ep);
unsigned char csr, csrh;
select_endpoint(EP_NUMBER2(ep)); select_endpoint(endpoint);
if (ep->busy)
{
if(EP_IS_IN(ep))
{
if (ep->wait)
semaphore_release(&ep->complete);
else usb_core_transfer_complete(endpoint, USB_DIR_IN, -1, 0);
}
else usb_core_transfer_complete(endpoint, USB_DIR_OUT, -1, 0);
}
ep->busy = false; ep->busy = false;
ep->wait = false; ep->wait = false;
ep->sent = 0; ep->sent = 0;
ep->length = 0; ep->length = 0;
if(ep->type == ep_bulk) if(ep->type != ep_control)
{ ep->fifo_size = usb_drv_port_speed() ? 512 : 64;
if(REG_USB_POWER & USB_POWER_HSMODE)
ep->fifo_size = 512;
else
ep->fifo_size = 64;
}
if(EP_IS_IN(ep)) if(EP_IS_IN(ep))
{ {
@ -427,6 +524,8 @@ static void setup_endpoint(struct usb_endpoint *ep)
REG_USB_INMAXP = ep->fifo_size; REG_USB_INMAXP = ep->fifo_size;
REG_USB_INCSR = csr; REG_USB_INCSR = csr;
REG_USB_INCSRH = csrh; REG_USB_INCSRH = csrh;
if (ep->allocated)
REG_USB_INTRINE |= USB_INTR_EP(EP_NUMBER2(ep)); REG_USB_INTRINE |= USB_INTR_EP(EP_NUMBER2(ep));
} }
else else
@ -443,6 +542,8 @@ static void setup_endpoint(struct usb_endpoint *ep)
REG_USB_OUTMAXP = ep->fifo_size; REG_USB_OUTMAXP = ep->fifo_size;
REG_USB_OUTCSR = csr; REG_USB_OUTCSR = csr;
REG_USB_OUTCSRH = csrh; REG_USB_OUTCSRH = csrh;
if (ep->allocated)
REG_USB_INTROUTE |= USB_INTR_EP(EP_NUMBER2(ep)); REG_USB_INTROUTE |= USB_INTR_EP(EP_NUMBER2(ep));
} }
} }
@ -483,10 +584,35 @@ static void udc_reset(void)
select_endpoint(0); select_endpoint(0);
REG_USB_CSR0 = (USB_CSR0_SVDOUTPKTRDY | USB_CSR0_SVDSETUPEND | USB_CSR0_FLUSHFIFO); REG_USB_CSR0 = (USB_CSR0_SVDOUTPKTRDY | USB_CSR0_SVDSETUPEND | USB_CSR0_FLUSHFIFO);
if (endpoints[0].busy)
{
if (endpoints[0].wait)
semaphore_release(&endpoints[0].complete);
else usb_core_transfer_complete(0, USB_DIR_IN, -1, 0);
}
endpoints[0].busy = false;
endpoints[0].wait = false;
endpoints[0].sent = 0;
endpoints[0].length = 0;
endpoints[0].allocated = true;
if (endpoints[1].busy)
usb_core_transfer_complete(0, USB_DIR_OUT, -1, 0);
endpoints[1].busy = false;
endpoints[1].wait = false;
endpoints[1].received = 0;
endpoints[1].length = 0;
endpoints[1].allocated = true;
/* Reset other endpoints */ /* Reset other endpoints */
for(i=2; i<TOTAL_EP(); i++) for(i=2; i<TOTAL_EP(); i++)
setup_endpoint(&endpoints[i]); setup_endpoint(&endpoints[i]);
ep0_data_supplied = false;
ep0_data_requested = false;
/* Enable interrupts */ /* Enable interrupts */
REG_USB_INTRINE |= USB_INTR_EP(0); REG_USB_INTRINE |= USB_INTR_EP(0);
REG_USB_INTRUSBE |= USB_INTR_RESET; REG_USB_INTRUSBE |= USB_INTR_RESET;
@ -498,7 +624,7 @@ static void udc_reset(void)
void OTG(void) void OTG(void)
{ {
/* Read interrupt registers */ /* Read interrupt registers */
unsigned char intrUSB = REG_USB_INTRUSB & 0x07; /* Mask SOF */ unsigned char intrUSB = REG_USB_INTRUSB;
unsigned short intrIn = REG_USB_INTRIN; unsigned short intrIn = REG_USB_INTRIN;
unsigned short intrOut = REG_USB_INTROUT; unsigned short intrOut = REG_USB_INTROUT;
unsigned char intrDMA = REG_USB_INTR; unsigned char intrDMA = REG_USB_INTR;
@ -689,17 +815,28 @@ void usb_drv_set_address(int address)
static void usb_drv_send_internal(struct usb_endpoint* ep, void* ptr, int length, bool blocking) static void usb_drv_send_internal(struct usb_endpoint* ep, void* ptr, int length, bool blocking)
{ {
if(ep->type == ep_control && ptr == NULL && length == 0)
return; /* ACK request, handled in the ISR */
int flags = disable_irq_save(); int flags = disable_irq_save();
if(ep->type == ep_control)
{
if ((ptr == NULL && length == 0) || !ep0_data_requested)
{
restore_irq(flags);
return;
}
ep0_data_requested = false;
}
ep->buf = ptr; ep->buf = ptr;
ep->sent = 0; ep->sent = 0;
ep->length = length; ep->length = length;
ep->busy = true; ep->busy = true;
if(blocking) if(blocking)
{
ep->rc = -1;
ep->wait = true; ep->wait = true;
}
else ep->rc = 0;
if(ep->type == ep_control) if(ep->type == ep_control)
{ {
@ -725,27 +862,39 @@ static void usb_drv_send_internal(struct usb_endpoint* ep, void* ptr, int length
if(blocking) if(blocking)
{ {
semaphore_wait(&ep->complete, TIMEOUT_BLOCK); semaphore_wait(&ep->complete, HZ);
ep->wait = false; ep->wait = false;
} }
} }
int usb_drv_send_nonblocking(int endpoint, void* ptr, int length) int usb_drv_send_nonblocking(int endpoint, void* ptr, int length)
{ {
struct usb_endpoint *ep = &endpoints[(endpoint & 0x7F)*2];
logf("%s(%d, 0x%x, %d)", __func__, endpoint, (int)ptr, length); logf("%s(%d, 0x%x, %d)", __func__, endpoint, (int)ptr, length);
usb_drv_send_internal(&endpoints[(endpoint & 0x7F)*2], ptr, length, false); if (ep->allocated)
{
usb_drv_send_internal(ep, ptr, length, false);
return 0; return 0;
} }
return -1;
}
int usb_drv_send(int endpoint, void* ptr, int length) int usb_drv_send(int endpoint, void* ptr, int length)
{ {
struct usb_endpoint *ep = &endpoints[(endpoint & 0x7F)*2];
logf("%s(%d, 0x%x, %d)", __func__, endpoint, (int)ptr, length); logf("%s(%d, 0x%x, %d)", __func__, endpoint, (int)ptr, length);
usb_drv_send_internal(&endpoints[(endpoint & 0x7F)*2], ptr, length, true); if (ep->allocated)
{
usb_drv_send_internal(ep, ptr, length, true);
return ep->rc;
}
return 0; return -1;
} }
int usb_drv_recv(int endpoint, void* ptr, int length) int usb_drv_recv(int endpoint, void* ptr, int length)
@ -756,13 +905,16 @@ int usb_drv_recv(int endpoint, void* ptr, int length)
logf("%s(%d, 0x%x, %d)", __func__, endpoint, (int)ptr, length); logf("%s(%d, 0x%x, %d)", __func__, endpoint, (int)ptr, length);
if(endpoint == EP_CONTROL) if (ptr == NULL || length == 0)
return 0; /* all EP0 OUT transactions are handled within the ISR */ return 0;
else
{
flags = disable_irq_save();
ep = &endpoints[endpoint*2+1]; ep = &endpoints[endpoint*2+1];
if (!ep->allocated)
return -1;
flags = disable_irq_save();
ep->buf = ptr; ep->buf = ptr;
ep->received = 0; ep->received = 0;
ep->length = length; ep->length = length;
@ -778,12 +930,18 @@ int usb_drv_recv(int endpoint, void* ptr, int length)
USB_CNTL_BURST_16); USB_CNTL_BURST_16);
} }
else else
EPOUT_handler(endpoint); {
if (endpoint == EP_CONTROL)
{
ep0_data_supplied = false;
EP0_handler();
}
else EPOUT_handler(endpoint);
}
restore_irq(flags); restore_irq(flags);
return 0; return 0;
} }
}
void usb_drv_set_test_mode(int mode) void usb_drv_set_test_mode(int mode)
{ {
@ -818,11 +976,19 @@ void usb_drv_cancel_all_transfers(void)
{ {
logf("%s()", __func__); logf("%s()", __func__);
unsigned int i, flags; unsigned int i, flags = disable_irq_save();
flags = disable_irq_save();
for(i=0; i<TOTAL_EP(); i++) for(i=0; i<TOTAL_EP(); i++)
{ {
if (endpoints[i].busy)
{
if (i & 1)
usb_core_transfer_complete(i >> 1, USB_DIR_OUT, -1, 0);
else if (endpoints[i].wait)
semaphore_release(&endpoints[i].complete);
else usb_core_transfer_complete(i >> 1, USB_DIR_IN, -1, 0);
}
if(i != 1) /* ep0 out needs special handling */ if(i != 1) /* ep0 out needs special handling */
endpoints[i].buf = NULL; endpoints[i].buf = NULL;
@ -835,11 +1001,27 @@ void usb_drv_cancel_all_transfers(void)
restore_irq(flags); restore_irq(flags);
} }
void usb_drv_release_endpoint(int ep) void usb_drv_release_endpoint(int ep)
{ {
(void)ep; int n = ep & 0x7f;
logf("%s(%d, %s)", __func__, (ep & 0x7F), (ep >> 7) ? "IN" : "OUT"); logf("%s(%d, %s)", __func__, (ep & 0x7F), (ep >> 7) ? "IN" : "OUT");
if (n)
{
int dir = ep & USB_ENDPOINT_DIR_MASK;
if(dir == USB_DIR_IN)
{
REG_USB_INTRINE &= ~USB_INTR_EP(n);
endpoints[n << 1].allocated = false;
}
else
{
REG_USB_INTROUTE &= ~USB_INTR_EP(n);
endpoints[(n << 1) + 1].allocated = false;
}
}
} }
int usb_drv_request_endpoint(int type, int dir) int usb_drv_request_endpoint(int type, int dir)
@ -854,17 +1036,43 @@ int usb_drv_request_endpoint(int type, int dir)
{ {
case USB_ENDPOINT_XFER_BULK: case USB_ENDPOINT_XFER_BULK:
if(dir == USB_DIR_IN) if(dir == USB_DIR_IN)
{
if (endpoints[2].allocated)
break;
endpoints[2].allocated = true;
REG_USB_INTRINE |= USB_INTR_EP(1);
return (1 | USB_DIR_IN); return (1 | USB_DIR_IN);
}
else else
{
if (endpoints[3].allocated)
break;
endpoints[3].allocated = true;
REG_USB_INTROUTE |= USB_INTR_EP(1);
return (1 | USB_DIR_OUT); return (1 | USB_DIR_OUT);
}
case USB_ENDPOINT_XFER_INT: case USB_ENDPOINT_XFER_INT:
if(dir == USB_DIR_IN) if(dir == USB_DIR_IN)
{
if (endpoints[4].allocated)
break;
endpoints[4].allocated = true;
REG_USB_INTRINE |= USB_INTR_EP(2);
return (2 | USB_DIR_IN); return (2 | USB_DIR_IN);
}
else else
{
if (endpoints[5].allocated)
break;
endpoints[5].allocated = true;
REG_USB_INTROUTE |= USB_INTR_EP(2);
return (2 | USB_DIR_OUT); return (2 | USB_DIR_OUT);
}
default: default:
break;
}
return -1; return -1;
} }
}