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add 'set_EP0_max_pkt_size(...)' and fix EP0 size to 64 bytes after reset

This commit is contained in:
Reinhard Panhuber 2020-07-26 19:21:30 +02:00
parent 1269bb440a
commit 5e3f90cd6e
1 changed files with 90 additions and 7 deletions
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97
src/portable/st/synopsys/dcd_synopsys.c
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@ -206,11 +206,10 @@ static void bus_reset(uint8_t rhport)
// are enabled at least "2 x (Largest-EPsize/4) + 1" are recommended. Maybe provide a macro for application to
// overwrite this.
#if TUD_OPT_HIGH_SPEED
_allocated_fifo_words = 271 + 2*EP_MAX;
#else
_allocated_fifo_words = 47 + 2*EP_MAX;
#endif
// We rework this here and initialize the FIFOs here only for the USB reset case. The rest is done once a
// configuration was set from the host. For this initialization phase we use 64 bytes as FIFO size.
_allocated_fifo_words = 16 + 2 + 10; // 64 bytes max packet size + 2 words (for the status of the control OUT data packet) + 10 words (for setup packets)
usb_otg->GRXFSIZ = _allocated_fifo_words;
@ -219,15 +218,98 @@ static void bus_reset(uint8_t rhport)
_allocated_fifo_words += 16;
// TU_LOG2_INT(_allocated_fifo_words);
// Fixed control EP0 size to 64 bytes
in_ep[0].DIEPCTL &= ~(0x03 << USB_OTG_DIEPCTL_MPSIZ_Pos);
xfer_status[0][TUSB_DIR_OUT].max_size = xfer_status[0][TUSB_DIR_IN].max_size = 64;
// Set SETUP packet count to 3
out_ep[0].DOEPTSIZ |= (3 << USB_OTG_DOEPTSIZ_STUPCNT_Pos);
usb_otg->GINTMSK |= USB_OTG_GINTMSK_OEPINT | USB_OTG_GINTMSK_IEPINT;
//#if TUD_OPT_HIGH_SPEED
// _allocated_fifo_words = 271 + 2*EP_MAX;
//#else
// _allocated_fifo_words = 47 + 2*EP_MAX;
//#endif
//
// usb_otg->GRXFSIZ = _allocated_fifo_words;
//
// // Control IN uses FIFO 0 with 64 bytes ( 16 32-bit word )
// usb_otg->DIEPTXF0_HNPTXFSIZ = (16 << USB_OTG_TX0FD_Pos) | _allocated_fifo_words;
//
// _allocated_fifo_words += 16;
//
// // TU_LOG2_INT(_allocated_fifo_words);
//
// // Fixed control EP0 size to 64 bytes
//// in_ep[0].DIEPCTL &= ~(0x03 << USB_OTG_DIEPCTL_MPSIZ_Pos);
//// xfer_status[0][TUSB_DIR_OUT].max_size = xfer_status[0][TUSB_DIR_IN].max_size = 64;
//
// // Set SETUP packet count to 3
// out_ep[0].DOEPTSIZ |= (3 << USB_OTG_DOEPTSIZ_STUPCNT_Pos);
//
// usb_otg->GINTMSK |= USB_OTG_GINTMSK_OEPINT | USB_OTG_GINTMSK_IEPINT;
}
// Required after new configuration received in case EP0 max packet size has changed
static bool set_EP0_max_pkt_size(uint8_t maxPktSize)
{
USB_OTG_DeviceTypeDef * dev = DEVICE_BASE(rhport);
USB_OTG_INEndpointTypeDef * in_ep = IN_EP_BASE(rhport);
uint32_t enum_spd = (dev->DSTS & USB_OTG_DSTS_ENUMSPD_Msk) >> USB_OTG_DSTS_ENUMSPD_Pos;
// Maximum packet size for EP 0 is set for both directions by writing DIEPCTL.
switch (enum_spd)
{
case 0x00: // High speed - always 64 byte
if (maxPktSize == 64)
{
in_ep[0].DIEPCTL &= ~(0x03 << USB_OTG_DIEPCTL_MPSIZ_Pos);
xfer_status[0][TUSB_DIR_OUT].max_size = xfer_status[0][TUSB_DIR_IN].max_size = 64;
return true;
}
return false; // Only 64 bytes are valid
case 0x03: // Full speed
switch (maxPktSize)
{
case 8:
in_ep[0].DIEPCTL |= (0x03 << USB_OTG_DIEPCTL_MPSIZ_Pos);
xfer_status[0][TUSB_DIR_OUT].max_size = xfer_status[0][TUSB_DIR_IN].max_size = 8;
break;
case 16:
in_ep[0].DIEPCTL &= ~(0x03 << USB_OTG_DIEPCTL_MPSIZ_Pos);
in_ep[0].DIEPCTL |= (0x02 << USB_OTG_DIEPCTL_MPSIZ_Pos);
xfer_status[0][TUSB_DIR_OUT].max_size = xfer_status[0][TUSB_DIR_IN].max_size = 16;
break;
case 32:
in_ep[0].DIEPCTL &= ~(0x03 << USB_OTG_DIEPCTL_MPSIZ_Pos);
in_ep[0].DIEPCTL |= (0x01 << USB_OTG_DIEPCTL_MPSIZ_Pos);
xfer_status[0][TUSB_DIR_OUT].max_size = xfer_status[0][TUSB_DIR_IN].max_size = 32;
break;
case 64:
in_ep[0].DIEPCTL &= ~(0x03 << USB_OTG_DIEPCTL_MPSIZ_Pos);
xfer_status[0][TUSB_DIR_OUT].max_size = xfer_status[0][TUSB_DIR_IN].max_size = 64;
break;
default:
return false; // Other sizes are not valid
}
return true;
default: // Low speed - always 8 bytes
in_ep[0].DIEPCTL |= (0x03 << USB_OTG_DIEPCTL_MPSIZ_Pos);
xfer_status[0][TUSB_DIR_OUT].max_size = 8;
xfer_status[0][TUSB_DIR_IN].max_size = 8;
return true;
}
}
// Set turn-around timeout according to link speed
@ -939,6 +1021,7 @@ void dcd_int_handler(uint8_t rhport)
tusb_speed_t const speed = get_speed(rhport);
set_turnaround(usb_otg, speed);
dcd_event_bus_reset(rhport, speed, true);
}