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fomu: first fully-working release

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This is able to transfer lots of data back and forth across MSC.

Signed-off-by: Sean Cross <sean@xobs.io>
This commit is contained in:
Sean Cross 2019-10-14 23:02:05 +08:00
parent 4a8475b8a7
commit 22fd7bf85e
1 changed files with 7 additions and 8 deletions
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15
src/portable/foosn/fomu/dcd_fomu.c
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@ -63,6 +63,7 @@ static void finish_tx(void) {
return;
}
// If the system isn't idle, then something is very wrong.
uint8_t in_status = usb_in_status_read();
if (!(in_status & (1 << CSR_USB_IN_STATUS_IDLE_OFFSET)))
fomu_error(__LINE__);
@ -92,8 +93,6 @@ static void process_rx(bool in_isr) {
return;
uint8_t rx_ep = (out_status >> CSR_USB_OUT_STATUS_EPNO_OFFSET) & 0xf;
if ((rx_ep != 0) && (rx_ep != 2) && (rx_ep != 3))
fomu_error(__LINE__);
// If the destination buffer doesn't exist, don't drain the hardware
// fifo. Note that this can cause deadlocks if the host is waiting
@ -117,9 +116,6 @@ static void process_rx(bool in_isr) {
if (rx_buffer_offset[rx_ep] > rx_buffer_max[rx_ep])
rx_buffer_offset[rx_ep] = rx_buffer_max[rx_ep];
if ((rx_ep == 3) && (rx_buffer[rx_ep][0] == 0x80) && (rx_buffer[rx_ep][1] == 0x25))
fomu_error(__LINE__);
if (rx_buffer_max[rx_ep] == rx_buffer_offset[rx_ep]) {
rx_buffer[rx_ep] = NULL;
uint16_t len = rx_buffer_offset[rx_ep];
@ -273,6 +269,7 @@ bool dcd_edpt_xfer (uint8_t rhport, uint8_t ep_addr, uint8_t* buffer, uint16_t t
(void)rhport;
uint8_t ep_num = tu_edpt_number(ep_addr);
uint8_t ep_dir = tu_edpt_dir(ep_addr);
TU_ASSERT(tx_ep < 16);
// These sorts of transfers are handled in hardware automatically, so simply inform
// the core that the transfer was processed.
@ -296,7 +293,9 @@ bool dcd_edpt_xfer (uint8_t rhport, uint8_t ep_addr, uint8_t* buffer, uint16_t t
// Wait for the tx pipe to free up
uint8_t previous_reset_count = reset_count;
while ((tx_buffer != NULL) || !(usb_in_status_read() & (1 << CSR_USB_IN_STATUS_IDLE_OFFSET)))
while (!((tx_buffer == NULL)
&& (usb_in_status_read() & (1 << CSR_USB_IN_STATUS_IDLE_OFFSET))
&& !(usb_in_status_read() & (1 << CSR_USB_IN_STATUS_HAVE_OFFSET))))
;
// If a reset happens while we're waiting, abort the transfer
if (previous_reset_count != reset_count)
@ -315,7 +314,6 @@ bool dcd_edpt_xfer (uint8_t rhport, uint8_t ep_addr, uint8_t* buffer, uint16_t t
}
else if (ep_dir == TUSB_DIR_OUT) {
TU_ASSERT(rx_buffer[ep_num] == NULL);
TU_ASSERT((ep_num == 0) || (ep_num == 2) || (ep_num == 3));
rx_buffer_offset[ep_num] = 0;
rx_buffer_max[ep_num] = total_bytes;
@ -324,7 +322,8 @@ bool dcd_edpt_xfer (uint8_t rhport, uint8_t ep_addr, uint8_t* buffer, uint16_t t
// If there's data in the buffer already, we'll try draining it
// into the current fifo immediately.
usb_out_ev_enable_write(0);
process_rx(false);
if (usb_out_status_read() & (1 << CSR_USB_OUT_STATUS_HAVE_OFFSET))
process_rx(false);
usb_out_ev_enable_write(1);
}
return true;