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refactor rp2040 usb

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- make _hw_endpoint_xfer_sync and _hw_endpoint_start_next_buffer private
- drop prefix _ from _hw_endpoint_xfer_continue and
_hw_endpoint_reset_transfer
This commit is contained in:
hathach
2021-06-11 17:34:51 +07:00
parent 572d986a02
commit 5d6e381ef6
4 changed files with 48 additions and 112 deletions
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85
src/portable/raspberrypi/rp2040/rp2040_usb.c
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@@ -50,6 +50,13 @@ static inline void _hw_endpoint_update_last_buf(struct hw_endpoint *ep)
}
#endif
//--------------------------------------------------------------------+
//
//--------------------------------------------------------------------+
void _hw_endpoint_xfer_sync(struct hw_endpoint *ep);
void _hw_endpoint_start_next_buffer(struct hw_endpoint *ep);
void rp2040_usb_init(void)
{
// Reset usb controller
@@ -180,8 +187,7 @@ void _hw_endpoint_start_next_buffer(struct hw_endpoint *ep)
_hw_endpoint_buffer_control_set_value32(ep, buf_ctrl);
}
void _hw_endpoint_xfer_start(struct hw_endpoint *ep, uint8_t *buffer, uint16_t total_len)
void hw_endpoint_xfer_start(struct hw_endpoint *ep, uint8_t *buffer, uint16_t total_len)
{
_hw_endpoint_lock_update(ep, 1);
pico_trace("Start transfer of total len %d on ep %d %s\n", total_len, tu_edpt_number(ep->ep_addr),
@@ -205,58 +211,34 @@ void _hw_endpoint_xfer_start(struct hw_endpoint *ep, uint8_t *buffer, uint16_t t
_hw_endpoint_lock_update(ep, -1);
}
void _hw_endpoint_xfer_sync (struct hw_endpoint *ep)
static void ep_sync_buf(struct hw_endpoint *ep, uint8_t buf_id)
{
// Update hw endpoint struct with info from hardware
// after a buff status interrupt
uint32_t buf_ctrl = _hw_endpoint_buffer_control_get_value32(ep);
if (buf_id) buf_ctrl = buf_ctrl >> 16;
uint32_t const buf_ctrl = _hw_endpoint_buffer_control_get_value32(ep);
print_bufctrl32(buf_ctrl);
uint16_t xferred_bytes = buf_ctrl & USB_BUF_CTRL_LEN_MASK;
// Transferred bytes for each buffer
uint16_t xferred_bytes[2];
xferred_bytes[0] = buf_ctrl & USB_BUF_CTRL_LEN_MASK;
// double buffered: take buffer1 into account as well
if ( (*ep->endpoint_control) & EP_CTRL_DOUBLE_BUFFERED_BITS )
{
xferred_bytes[1] = (buf_ctrl >> 16) & USB_BUF_CTRL_LEN_MASK;
}else
{
xferred_bytes[1] = 0;
}
TU_LOG_INT(2, xferred_bytes[0]);
TU_LOG_INT(2, xferred_bytes[1]);
// We are continuing a transfer here. If we are TX, we have successfully
// sent some data can increase the length we have sent
if ( !ep->rx )
{
// We are continuing a transfer here. If we are TX, we have successfully
// sent some data can increase the length we have sent
assert(!(buf_ctrl & USB_BUF_CTRL_FULL));
ep->len += xferred_bytes[0] + xferred_bytes[1];
}
else
ep->len += xferred_bytes;
}else
{
// If we are OUT we have recieved some data, so can increase the length
// we have recieved AFTER we have copied it to the user buffer at the appropriate offset
// If we have received some data, so can increase the length
// we have received AFTER we have copied it to the user buffer at the appropriate offset
assert(buf_ctrl & USB_BUF_CTRL_FULL);
memcpy(&ep->user_buf[ep->len], ep->hw_data_buf, xferred_bytes[0]);
ep->len += xferred_bytes[0];
if (xferred_bytes[1])
{
memcpy(&ep->user_buf[ep->len], ep->hw_data_buf+64, xferred_bytes[1]);
ep->len += xferred_bytes[1];
}
memcpy(&ep->user_buf[ep->len], ep->hw_data_buf + buf_id*64, xferred_bytes);
ep->len += xferred_bytes;
}
// Sometimes the host will send less data than we expect...
// If this is a short out transfer update the total length of the transfer
// to be the current length
if ( (ep->rx) && ((xferred_bytes[0] < ep->wMaxPacketSize) || (xferred_bytes[1] && (xferred_bytes[1] < ep->wMaxPacketSize))) )
// Short packet
// TODO what if we prepare double buffered but receive short packet on buffer 0 !!!
// would the buffer status or trans complete interrupt is triggered
if (xferred_bytes < ep->wMaxPacketSize)
{
pico_trace("Short rx transfer\n");
// Reduce total length as this is last packet
@@ -264,8 +246,23 @@ void _hw_endpoint_xfer_sync (struct hw_endpoint *ep)
}
}
void _hw_endpoint_xfer_sync (struct hw_endpoint *ep)
{
// Update hw endpoint struct with info from hardware
// after a buff status interrupt
// always sync buffer 0
ep_sync_buf(ep, 0);
// sync buffer 1 if double buffered
if ( (*ep->endpoint_control) & EP_CTRL_DOUBLE_BUFFERED_BITS )
{
ep_sync_buf(ep, 1);
}
}
// Returns true if transfer is complete
bool _hw_endpoint_xfer_continue(struct hw_endpoint *ep)
bool hw_endpoint_xfer_continue(struct hw_endpoint *ep)
{
_hw_endpoint_lock_update(ep, 1);
// Part way through a transfer