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stm32f4: Implement setup packing receive, fix typo in FIFO receive size.

This commit is contained in:
William D. Jones 2019-01-19 20:03:18 -05:00
parent 06c15bf913
commit 5720aef7bb
1 changed files with 51 additions and 3 deletions
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54
src/portable/stm/stm32f4/dcd_stm32f4.c
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@ -49,9 +49,11 @@
#define DEVICE_BASE (USB_OTG_DeviceTypeDef *) (USB_OTG_FS_PERIPH_BASE + USB_OTG_DEVICE_BASE)
#define OUT_EP_BASE (USB_OTG_OUTEndpointTypeDef *) (USB_OTG_FS_PERIPH_BASE + USB_OTG_OUT_ENDPOINT_BASE)
#define IN_EP_BASE (USB_OTG_INEndpointTypeDef *) (USB_OTG_FS_PERIPH_BASE + USB_OTG_IN_ENDPOINT_BASE)
#define FIFO_BASE(_x) (uint32_t *) (USB_OTG_FS_PERIPH_BASE + USB_OTG_FIFO_BASE + _x * USB_OTG_FIFO_SIZE)
//static ATTR_ALIGNED(4) uint8_t _setup_packet[8];
static ATTR_ALIGNED(4) uint32_t _setup_packet[6];
static uint8_t _setup_cnt; // We store up to 3 setup packets.
// Setup the control endpoint 0.
static void bus_reset(void) {
@ -74,7 +76,7 @@ static void bus_reset(void) {
// * 2 locations for OUT endpoint control words.
// * 64 bytes for maximum control packet size.
// IN FIFO uses 64 words for maximum control packet size.
USB_OTG_FS->GRXFSIZ = 19; // 10 + 2 + 64 = 19 32-bit words
USB_OTG_FS->GRXFSIZ = 28; // 10 + 2 + 16 = 28 32-bit words
USB_OTG_FS->DIEPTXF0_HNPTXFSIZ = 16; // 16 32-bit words = 64 bytes
out_ep[0].DOEPTSIZ |= (3 << USB_OTG_DOEPTSIZ_STUPCNT_Pos);
@ -120,7 +122,7 @@ bool dcd_init (uint8_t rhport)
/* USB_OTG_FS->GINTMSK |= USB_OTG_GINTMSK_USBRST | USB_OTG_GINTMSK_ENUMDNEM | \
USB_OTG_GINTMSK_ESUSPM | USB_OTG_GINTMSK_USBSUSPM | \
USB_OTG_GINTMSK_SOFM; */
USB_OTG_FS->GINTMSK |= USB_OTG_GINTMSK_USBRST | USB_OTG_GINTMSK_ENUMDNEM;
USB_OTG_FS->GINTMSK |= USB_OTG_GINTMSK_USBRST | USB_OTG_GINTMSK_ENUMDNEM | USB_OTG_GINTMSK_RXFLVLM;
// Enable pullup, enable peripheral.
USB_OTG_FS->GCCFG |= USB_OTG_GCCFG_VBUSBSEN | USB_OTG_GCCFG_PWRDWN;
@ -333,6 +335,9 @@ USB_TRFAIL1_PERR_0, USB_TRFAIL1_PERR_1, USB_TRFAIL1_PERR_2,
USB_TRFAIL1_PERR_3, USB_TRFAIL1_PERR_4, USB_TRFAIL1_PERR_5,
USB_TRFAIL1_PERR_6, USB_TRFAIL1_PERR_7, USB_UPRSM, USB_WAKEUP */
void OTG_FS_IRQHandler(void) {
USB_OTG_OUTEndpointTypeDef * out_ep = OUT_EP_BASE;
uint32_t * rx_fifo = FIFO_BASE(0);
uint32_t int_status = USB_OTG_FS->GINTSTS;
if(int_status & USB_OTG_GINTSTS_USBRST) {
@ -350,6 +355,49 @@ void OTG_FS_IRQHandler(void) {
dcd_event_bus_signal(0, DCD_EVENT_BUS_RESET, true);
}
// Read a packet here; the FIFO must be cleared in order for the core
// to continue processing. So read into an intermediate buffer.
if(int_status & USB_OTG_GINTSTS_RXFLVL) {
USB_OTG_FS->GINTSTS = USB_OTG_GINTSTS_RXFLVL;
// Receive data before reenabling interrupts.
USB_OTG_FS->GINTMSK &= (~USB_OTG_GINTMSK_RXFLVLM);
// Pop control word off FIFO (completed xfers will have 2 control words,
// we only pop one ctl word each interrupt).
uint32_t ctl_word = USB_OTG_FS->GRXSTSP;
uint8_t pktsts = (ctl_word & USB_OTG_GRXSTSP_PKTSTS_Msk) >> USB_OTG_GRXSTSP_PKTSTS_Pos;
switch(pktsts) {
case 0x01: // Global OUT NAK (Interrupt)
break;
case 0x02: // Out packet recvd
break;
case 0x03: // Out packet done (Interrupt)
break;
case 0x04: // Setup packet done (Interrupt)
_setup_cnt = 3 - ((out_ep[0].DOEPTSIZ & USB_OTG_DOEPTSIZ_STUPCNT_Msk) >> USB_OTG_DOEPTSIZ_STUPCNT_Pos);
out_ep[0].DOEPTSIZ |= (3 << USB_OTG_DOEPTSIZ_STUPCNT_Pos);
break;
case 0x06: // Setup packet recvd
{
uint8_t setup_left = ((out_ep[0].DOEPTSIZ & USB_OTG_DOEPTSIZ_STUPCNT_Msk) >> USB_OTG_DOEPTSIZ_STUPCNT_Pos);
// We can receive up to three setup packets in succession, but
// only the last one is valid.
_setup_packet[4 - 2*setup_left] = (* rx_fifo);
_setup_packet[5 - 2*setup_left] = (* rx_fifo);
}
break;
default: // Invalid, do something here?
break;
}
USB_OTG_FS->GINTMSK |= USB_OTG_GINTMSK_RXFLVLM;
}
// OUT endpoint interrupt handling.
// if(int_status & )
// uint32_t int_status = USB->DEVICE.INTFLAG.reg;
//