/* Called to start packet transmission. */
int udc_endpoint_write (struct usb_endpoint_instance *endpoint)
{
unsigned short epnum =
endpoint->endpoint_address & USB_ENDPOINT_NUMBER_MASK;
debug("Entering for ep %x \n", epnum);
if (endpoint->tx_urb) {
u32 ep_csr1;
debug_urb_buffer("We have an URB, transmitting", endpoint);
S3C24X0_write_noniso_tx_fifo(endpoint);
S3C24X0_UDC_SETIX(epnum);
ep_csr1 = inl(S3C24X0_UDC_IN_CSR1_REG);
outl(ep_csr1|S3C24X0_UDC_ICSR1_PKTRDY, S3C24X0_UDC_IN_CSR1_REG);
} else
debug("\n");
return 0;
}
static void S3C24X0_udc_epn(int ep)
{
struct usb_endpoint_instance *endpoint;
struct urb *urb;
u32 ep_csr1;
if (ep >= S3C24X0_UDC_NUM_ENDPOINTS)
return;
endpoint = &udc_device->bus->endpoint_array[ep];
S3C24X0_UDC_SETIX(ep);
if (endpoint->endpoint_address & USB_DIR_IN) {
/* IN transfer (device to host) */
ep_csr1 = inl(S3C24X0_UDC_IN_CSR1_REG);
debug("for ep=%u, CSR1=0x%x ", ep, ep_csr1);
urb = endpoint->tx_urb;
if (ep_csr1 & S3C24X0_UDC_ICSR1_SENTSTL) {
/* Stall handshake */
debug("stall\n");
outl(0x00, S3C24X0_UDC_IN_CSR1_REG);
return;
}
if (!(ep_csr1 & S3C24X0_UDC_ICSR1_PKTRDY) && urb &&
urb->actual_length) {
debug("completing previously send data ");
usbd_tx_complete(endpoint);
/* push pending data into FIFO */
if ((endpoint->last == endpoint->tx_packetSize) &&
(urb->actual_length - endpoint->sent - endpoint->last == 0)) {
endpoint->sent += endpoint->last;
/* Write 0 bytes of data (ZLP) */
debug("ZLP ");
outl(ep_csr1|S3C24X0_UDC_ICSR1_PKTRDY, S3C24X0_UDC_IN_CSR1_REG);
} else {
/* write actual data to fifo */
debug_urb_buffer("TX_DATA", endpoint);
S3C24X0_write_noniso_tx_fifo(endpoint);
outl(ep_csr1|S3C24X0_UDC_ICSR1_PKTRDY, S3C24X0_UDC_IN_CSR1_REG);
}
}
debug("\n");
} else {
/* OUT transfer (host to device) */
ep_csr1 = inl(S3C24X0_UDC_OUT_CSR1_REG);
debug("for ep=%u, CSR1=0x%x ", ep, ep_csr1);
urb = endpoint->rcv_urb;
if (ep_csr1 & S3C24X0_UDC_OCSR1_SENTSTL) {
/* Stall handshake */
outl(0x00, S3C24X0_UDC_IN_CSR1_REG);
return;
}
if ((ep_csr1 & S3C24X0_UDC_OCSR1_PKTRDY) && urb) {
/* Read pending data from fifo */
u32 fifo_count = fifo_count_out();
int is_last = 0;
u32 i, urb_avail = urb->buffer_length - urb->actual_length;
u8 *cp = urb->buffer + urb->actual_length;
if (fifo_count < endpoint->rcv_packetSize)
is_last = 1;
debug("fifo_count=%u is_last=%, urb_avail=%u)\n",
fifo_count, is_last, urb_avail);
if (fifo_count < urb_avail)
urb_avail = fifo_count;
for (i = 0; i < urb_avail; i++)
*cp++ = inb(ep_fifo_reg[ep]);
if (is_last)
outl(ep_csr1 & ~S3C24X0_UDC_OCSR1_PKTRDY,
S3C24X0_UDC_OUT_CSR1_REG);
usbd_rcv_complete(endpoint, urb_avail, 0);
}
}
urb = endpoint->rcv_urb;
}
static void s3c2410_udc_epn(int ep)
{
struct usb_endpoint_instance *endpoint;
struct urb *urb;
u32 ep_csr1;
if (ep >= S3C2410_UDC_NUM_ENDPOINTS)
return;
endpoint = &udc_device->bus->endpoint_array[ep];
S3C2410_UDC_SETIX(ep);
if (endpoint->endpoint_address & USB_DIR_IN) {
/* IN transfer (device to host) */
ep_csr1 = inl(S3C2410_UDC_IN_CSR1_REG);
debug("for ep=%u, IN_CSR1=0x%x ", ep, ep_csr1);
urb = endpoint->tx_urb;
if (ep_csr1 & S3C2410_UDC_ICSR1_SENTSTL) {
/* Stall handshake */
debug("stall\n");
outl(0x00, S3C2410_UDC_IN_CSR1_REG);
return;
}
if (!(ep_csr1 & S3C2410_UDC_ICSR1_PKTRDY) && urb &&
urb->actual_length) {
debug("completing previously send data ");
usbd_tx_complete(endpoint);
/* push pending data into FIFO */
if ((endpoint->last == endpoint->tx_packetSize) &&
(urb->actual_length - endpoint->sent - endpoint->last == 0)) {
endpoint->sent += endpoint->last;
/* Write 0 bytes of data (ZLP) */
debug("ZLP ");
outl(ep_csr1|S3C2410_UDC_ICSR1_PKTRDY, S3C2410_UDC_IN_CSR1_REG);
} else {
/* write actual data to fifo */
debug_urb_buffer("TX_DATA", endpoint);
s3c2410_write_noniso_tx_fifo(endpoint);
outl(ep_csr1|S3C2410_UDC_ICSR1_PKTRDY, S3C2410_UDC_IN_CSR1_REG);
}
}
debug("\n");
} else {
/* OUT transfer (host to device) */
ep_csr1 = inl(S3C2410_UDC_OUT_CSR1_REG);
debug("for ep=%u, OUT_CSR1=0x%x ", ep, ep_csr1);
urb = endpoint->rcv_urb;
if (ep_csr1 & S3C2410_UDC_OCSR1_SENTSTL) {
/* Stall handshake */
debugX("SENT STALL\n");
outl(0x00, S3C2410_UDC_IN_CSR1_REG);
return;
}
if ((ep_csr1 & S3C2410_UDC_OCSR1_PKTRDY) && urb) {
/* Read pending data from fifo */
u32 fifo_count = fifo_count_out();
int is_last = 0;
u32 i, urb_avail = urb->buffer_length - urb->actual_length;
u8 *cp = urb->buffer + urb->actual_length;
if (fifo_count < endpoint->rcv_packetSize)
is_last = 1;
debug("fifo_count=%u is_last=%d, urb_avail=%u\n",
fifo_count, is_last, urb_avail);
if (fifo_count < urb_avail)
urb_avail = fifo_count;
for (i = 0; i < urb_avail; i++)
*cp++ = inb(ep_fifo_reg[ep]);
/* if (is_last) */
/*
* Once the MCU reads the packet from FIFO,
* this bit should be cleared
*/
#ifndef AUTO_CLEAR
outl(ep_csr1 & ~S3C2410_UDC_OCSR1_PKTRDY,
S3C2410_UDC_OUT_CSR1_REG);
#endif
usbd_rcv_complete(endpoint, urb_avail, 0);
/* FIXME is there a better way to notify that,
* we have got data */
usbd_device_event_irq(udc_device,
DEVICE_FUNCTION_PRIVATE, 0);
}
}
urb = endpoint->rcv_urb;
}
