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FSDEV: go to NAK when unstalling; on reset, set EP0 to NAK, prioritize reset interrupt, fix small typos.

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This commit is contained in:
Nathan Conrad 2019-09-21 12:00:04 -04:00
parent f90f1a278b
commit ce9f133d25
1 changed files with 29 additions and 22 deletions
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51
src/portable/st/stm32_fsdev/dcd_stm32_fsdev.c
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@ -331,7 +331,9 @@ static const tusb_desc_endpoint_t ep0IN_desc =
.bEndpointAddress = 0x80 .bEndpointAddress = 0x80
}; };
#if defined(__GNUC__) && (__GNUC__ >= 7)
#pragma GCC diagnostic pop #pragma GCC diagnostic pop
#endif
static void dcd_handle_bus_reset(void) static void dcd_handle_bus_reset(void)
{ {
@ -349,7 +351,6 @@ static void dcd_handle_bus_reset(void)
dcd_edpt_open (0, &ep0IN_desc); dcd_edpt_open (0, &ep0IN_desc);
newDADDR = 0u; newDADDR = 0u;
USB->DADDR = USB_DADDR_EF; // Set enable flag, and leaving the device address as zero. USB->DADDR = USB_DADDR_EF; // Set enable flag, and leaving the device address as zero.
pcd_set_ep_rx_status(USB, 0, USB_EP_RX_VALID); // And start accepting SETUP on EP0
} }
// FIXME: Defined to return uint16 so that ASSERT can be used, even though a return value is not needed. // FIXME: Defined to return uint16 so that ASSERT can be used, even though a return value is not needed.
@ -518,8 +519,22 @@ static uint16_t dcd_ep_ctr_handler(void)
static void dcd_fs_irqHandler(void) { static void dcd_fs_irqHandler(void) {
uint16_t int_status = USB->ISTR; uint32_t int_status = USB->ISTR;
// unused IRQs: (USB_ISTR_PMAOVR | USB_ISTR_ERR | USB_ISTR_WKUP | USB_ISTR_SUSP | USB_ISTR_ESOF | USB_ISTR_L1REQ ) //const uint32_t handled_ints = USB_ISTR_CTR | USB_ISTR_RESET | USB_ISTR_WKUP
// | USB_ISTR_SUSP | USB_ISTR_SOF | USB_ISTR_ESOF;
// unused IRQs: (USB_ISTR_PMAOVR | USB_ISTR_ERR | USB_ISTR_L1REQ )
// The ST driver loops here on the CTR bit, but that loop has been moved into the
// dcd_ep_ctr_handler(), so less need to loop here. The other interrupts shouldn't
// be triggered repeatedly.
if(int_status & USB_ISTR_RESET) {
// USBRST is start of reset.
reg16_clear_bits(&USB->ISTR, USB_ISTR_RESET);
dcd_handle_bus_reset();
dcd_event_bus_signal(0, DCD_EVENT_BUS_RESET, true);
return; // Don't do the rest of the things here; perhaps they've been cleared?
}
if (int_status & USB_ISTR_CTR) if (int_status & USB_ISTR_CTR)
{ {
@ -528,12 +543,7 @@ static void dcd_fs_irqHandler(void) {
dcd_ep_ctr_handler(); dcd_ep_ctr_handler();
reg16_clear_bits(&USB->ISTR, USB_ISTR_CTR); reg16_clear_bits(&USB->ISTR, USB_ISTR_CTR);
} }
if(int_status & USB_ISTR_RESET) {
// USBRST is start of reset.
reg16_clear_bits(&USB->ISTR, USB_ISTR_RESET);
dcd_handle_bus_reset();
dcd_event_bus_signal(0, DCD_EVENT_BUS_RESET, true);
}
if (int_status & USB_ISTR_WKUP) if (int_status & USB_ISTR_WKUP)
{ {
reg16_clear_bits(&USB->CNTR, USB_CNTR_LPMODE); reg16_clear_bits(&USB->CNTR, USB_CNTR_LPMODE);
@ -544,6 +554,9 @@ static void dcd_fs_irqHandler(void) {
if (int_status & USB_ISTR_SUSP) if (int_status & USB_ISTR_SUSP)
{ {
/* Suspend is asserted for both suspend and unplug events. without Vbus monitoring,
* these events cannot be differentiated, so we only trigger suspend. */
/* Force low-power mode in the macrocell */ /* Force low-power mode in the macrocell */
USB->CNTR |= USB_CNTR_FSUSP; USB->CNTR |= USB_CNTR_FSUSP;
USB->CNTR |= USB_CNTR_LPMODE; USB->CNTR |= USB_CNTR_LPMODE;
@ -696,25 +709,19 @@ void dcd_edpt_stall (uint8_t rhport, uint8_t ep_addr)
{ {
(void)rhport; (void)rhport;
if (ep_addr == 0) { // CTRL EP0 (OUT for setup) if (ep_addr & 0x80)
pcd_set_ep_tx_status(USB,ep_addr, USB_EP_TX_STALL); { // IN
pcd_set_ep_tx_status(USB, ep_addr & 0x7F, USB_EP_TX_STALL);
} }
else
if (ep_addr & 0x80) { // IN { // OUT
ep_addr &= 0x7F; pcd_set_ep_rx_status(USB, ep_addr, USB_EP_RX_STALL);
pcd_set_ep_tx_status(USB,ep_addr, USB_EP_TX_STALL);
} else { // OUT
pcd_set_ep_rx_status(USB,ep_addr, USB_EP_RX_STALL);
} }
} }
void dcd_edpt_clear_stall (uint8_t rhport, uint8_t ep_addr) void dcd_edpt_clear_stall (uint8_t rhport, uint8_t ep_addr)
{ {
(void)rhport; (void)rhport;
if (ep_addr == 0)
{
pcd_set_ep_tx_status(USB,ep_addr, USB_EP_TX_NAK);
}
if (ep_addr & 0x80) if (ep_addr & 0x80)
{ // IN { // IN
@ -730,7 +737,7 @@ void dcd_edpt_clear_stall (uint8_t rhport, uint8_t ep_addr)
/* Reset to DATA0 if clearing stall condition. */ /* Reset to DATA0 if clearing stall condition. */
pcd_clear_rx_dtog(USB,ep_addr); pcd_clear_rx_dtog(USB,ep_addr);
pcd_set_ep_rx_status(USB,ep_addr, USB_EP_RX_VALID); pcd_set_ep_rx_status(USB,ep_addr, USB_EP_RX_NAK);
} }
} }