diff options
Diffstat (limited to 'tinyusb/src/portable/nuvoton/nuc505/dcd_nuc505.c')
-rwxr-xr-x | tinyusb/src/portable/nuvoton/nuc505/dcd_nuc505.c | 712 |
1 files changed, 712 insertions, 0 deletions
diff --git a/tinyusb/src/portable/nuvoton/nuc505/dcd_nuc505.c b/tinyusb/src/portable/nuvoton/nuc505/dcd_nuc505.c new file mode 100755 index 00000000..4e633086 --- /dev/null +++ b/tinyusb/src/portable/nuvoton/nuc505/dcd_nuc505.c @@ -0,0 +1,712 @@ +/* + * The MIT License (MIT) + * + * Copyright (c) 2020 Peter Lawrence + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + * + * This file is part of the TinyUSB stack. + */ + +/* + Theory of operation: + + The NUC505 USBD peripheral has twelve "EP"s, where each is simplex, in addition + to dedicated support for the control endpoint (EP0). The non-user endpoints + are referred to as "user" EPs in this code, and follow the datasheet + nomenclature of EPA through EPL. +*/ + +#include "tusb_option.h" + +#if TUSB_OPT_DEVICE_ENABLED && (CFG_TUSB_MCU == OPT_MCU_NUC505) + +#include "device/dcd.h" +#include "NUC505Series.h" + +/* + * The DMA functionality of the USBD peripheral does not appear to succeed with + * transfer lengths that are longer (> 64 bytes) and are not a multiple of 4. + * Keep disabled for now. + */ +#define USE_DMA 0 + +/* rather important info unfortunately not provided by device include files */ +#define USBD_BUF_SIZE 2048 /* how much USB buffer space there is */ +#define USBD_MAX_DMA_LEN 0x1000 /* max bytes that can be DMAed at one time */ + +enum ep_enum +{ + PERIPH_EPA = 0, + PERIPH_EPB = 1, + PERIPH_EPC = 2, + PERIPH_EPD = 3, + PERIPH_EPE = 4, + PERIPH_EPF = 5, + PERIPH_EPG = 6, + PERIPH_EPH = 7, + PERIPH_EPI = 8, + PERIPH_EPJ = 9, + PERIPH_EPK = 10, + PERIPH_EPL = 11, + PERIPH_MAX_EP, +}; + +static const uint8_t epcfg_eptype_table[] = +{ + [TUSB_XFER_CONTROL] = 0, /* won't happen, since control EPs have dedicated registers */ + [TUSB_XFER_ISOCHRONOUS] = 3 << USBD_EPCFG_EPTYPE_Pos, + [TUSB_XFER_BULK] = 1 << USBD_EPCFG_EPTYPE_Pos, + [TUSB_XFER_INTERRUPT] = 2 << USBD_EPCFG_EPTYPE_Pos, +}; + +static const uint8_t eprspctl_eptype_table[] = +{ + [TUSB_XFER_CONTROL] = 0, /* won't happen, since control EPs have dedicated registers */ + [TUSB_XFER_ISOCHRONOUS] = 2 << USBD_EPRSPCTL_MODE_Pos, /* Fly Mode */ + [TUSB_XFER_BULK] = 0 << USBD_EPRSPCTL_MODE_Pos, /* Auto-Validate Mode */ + [TUSB_XFER_INTERRUPT] = 1 << USBD_EPRSPCTL_MODE_Pos, /* Manual-Validate Mode */ +}; + +/* set by dcd_set_address() */ +static volatile uint8_t assigned_address; + +/* reset by bus_reset(), this is used by dcd_edpt_open() to assign USBD peripheral buffer addresses */ +static uint32_t bufseg_addr; + +/* RAM table needed to track ongoing transfers performed by dcd_edpt_xfer(), dcd_userEP_in_xfer(), and the ISR */ +static struct xfer_ctl_t +{ + uint8_t *data_ptr; /* data_ptr tracks where to next copy data to (for OUT) or from (for IN) */ + // tu_fifo_t* ff; // TODO support dcd_edpt_xfer_fifo API + union { + uint16_t in_remaining_bytes; /* for IN endpoints, we track how many bytes are left to transfer */ + uint16_t out_bytes_so_far; /* but for OUT endpoints, we track how many bytes we've transferred so far */ + }; + uint16_t max_packet_size; /* needed since device driver only finds out this at runtime */ + uint16_t total_bytes; /* quantity needed to pass as argument to dcd_event_xfer_complete() (for IN endpoints) */ + uint8_t ep_addr; + bool dma_requested; +} xfer_table[PERIPH_MAX_EP]; + +/* in addition to xfer_table, additional bespoke bookkeeping is maintained for control EP0 IN */ +static struct +{ + uint8_t *data_ptr; + uint16_t in_remaining_bytes; + uint16_t total_bytes; +} ctrl_in_xfer; + +static volatile struct xfer_ctl_t *current_dma_xfer; + + +/* + local helper functions +*/ + +static void usb_attach(void) +{ + USBD->PHYCTL |= USBD_PHYCTL_DPPUEN_Msk; +} + +static void usb_detach(void) +{ + USBD->PHYCTL &= ~USBD_PHYCTL_DPPUEN_Msk; +} + +static void usb_control_send_zlp(void) +{ + USBD->CEPINTSTS = USBD_CEPINTSTS_STSDONEIF_Msk; + USBD->CEPCTL = 0; /* clear NAKCLR bit */ + USBD->CEPINTEN = USBD_CEPINTEN_STSDONEIEN_Msk; +} + +/* map 8-bit ep_addr into peripheral endpoint index (PERIPH_EPA...) */ +static USBD_EP_T *ep_entry(uint8_t ep_addr, bool add) +{ + USBD_EP_T *ep; + enum ep_enum ep_index; + struct xfer_ctl_t *xfer; + + for (ep_index = PERIPH_EPA, xfer = &xfer_table[PERIPH_EPA], ep = USBD->EP; ep_index < PERIPH_MAX_EP; ep_index++, xfer++, ep++) + { + if (add) + { + /* take first peripheral endpoint that is unused */ + if (0 == (ep->EPCFG & USBD_EPCFG_EPEN_Msk)) return ep; + } + else + { + /* find a peripheral endpoint that matches ep_addr */ + if (xfer->ep_addr == ep_addr) return ep; + } + } + + return NULL; +} + +/* perform a non-control IN endpoint transfer; this is called by the ISR */ +static void dcd_userEP_in_xfer(struct xfer_ctl_t *xfer, USBD_EP_T *ep) +{ + uint16_t const bytes_now = tu_min16(xfer->in_remaining_bytes, xfer->max_packet_size); + + /* precompute what amount of data will be left */ + xfer->in_remaining_bytes -= bytes_now; + + /* + if there will be no more data to send, we replace the BUFEMPTYIF EP interrupt with TXPKIF; + that way, we alert TinyUSB as soon as this last packet has been sent + */ + if (0 == xfer->in_remaining_bytes) + { + ep->EPINTSTS = USBD_EPINTSTS_TXPKIF_Msk; + ep->EPINTEN = USBD_EPINTEN_TXPKIEN_Msk; + } + + /* provided buffers are thankfully 32-bit aligned, allowing most data to be transfered as 32-bit */ +#if 0 // TODO support dcd_edpt_xfer_fifo API + if (xfer->ff) + { + tu_fifo_read_n_const_addr_full_words(xfer->ff, (void *) (&ep->EPDAT_BYTE), bytes_now); + } + else +#endif + { + uint16_t countdown = bytes_now; + while (countdown > 3) + { + uint32_t u32; + memcpy(&u32, xfer->data_ptr, 4); + + ep->EPDAT = u32; + xfer->data_ptr += 4; countdown -= 4; + } + + while (countdown--) ep->EPDAT_BYTE = *xfer->data_ptr++; + } + + /* for short packets, we must nudge the peripheral to say 'that's all folks' */ + if (bytes_now != xfer->max_packet_size) ep->EPRSPCTL = USBD_EPRSPCTL_SHORTTXEN_Msk; +} + +/* called by dcd_init() as well as by the ISR during a USB bus reset */ +static void bus_reset(void) +{ + for (enum ep_enum ep_index = PERIPH_EPA; ep_index < PERIPH_MAX_EP; ep_index++) + { + USBD->EP[ep_index].EPCFG = 0; + xfer_table[ep_index].dma_requested = false; + } + + USBD->DMACNT = 0; + USBD->DMACTL = USBD_DMACTL_DMARST_Msk; + USBD->DMACTL = 0; + + /* allocate the default EP0 endpoints */ + + USBD->CEPBUFSTART = 0; + USBD->CEPBUFEND = 0 + CFG_TUD_ENDPOINT0_SIZE - 1; + + /* USB RAM beyond what we've allocated above is available to the user */ + bufseg_addr = CFG_TUD_ENDPOINT0_SIZE; + + /* Reset USB device address */ + USBD->FADDR = 0; + + current_dma_xfer = NULL; +} + +#if USE_DMA +/* this must only be called by the ISR; it does its best to share the single DMA engine across all user EPs (IN and OUT) */ +static void service_dma(void) +{ + if (current_dma_xfer) + return; + + enum ep_enum ep_index; + struct xfer_ctl_t *xfer; + USBD_EP_T *ep; + + for (ep_index = PERIPH_EPA, xfer = &xfer_table[PERIPH_EPA], ep = &USBD->EP[PERIPH_EPA]; ep_index < PERIPH_MAX_EP; ep_index++, xfer++, ep++) + { + uint16_t const available_bytes = ep->EPDATCNT & USBD_EPDATCNT_DATCNT_Msk; + + if (!xfer->dma_requested || !available_bytes) + continue; + + /* + instruct DMA to copy the data from the PC to the previously provided buffer + when the bus interrupt DMADONEIEN subsequently fires, the transfer will have finished + */ + USBD->DMACTL = xfer->ep_addr & USBD_DMACTL_EPNUM_Msk; + USBD->DMAADDR = (uint32_t)xfer->data_ptr; + USBD->DMACNT = available_bytes; + USBD->BUSINTSTS = USBD_BUSINTSTS_DMADONEIF_Msk; + xfer->out_bytes_so_far += available_bytes; + current_dma_xfer = xfer; + USBD->DMACTL |= USBD_DMACTL_DMAEN_Msk; + + return; + } +} +#endif + +/* centralized location for USBD interrupt enable bit masks */ +static const uint32_t enabled_irqs = USBD_GINTEN_USBIEN_Msk | \ + USBD_GINTEN_EPAIEN_Msk | USBD_GINTEN_EPBIEN_Msk | USBD_GINTEN_EPCIEN_Msk | USBD_GINTEN_EPDIEN_Msk | USBD_GINTEN_EPEIEN_Msk | USBD_GINTEN_EPFIEN_Msk | \ + USBD_GINTEN_EPGIEN_Msk | USBD_GINTEN_EPHIEN_Msk | USBD_GINTEN_EPIIEN_Msk | USBD_GINTEN_EPJIEN_Msk | USBD_GINTEN_EPKIEN_Msk | USBD_GINTEN_EPLIEN_Msk | \ + USBD_GINTEN_CEPIEN_Msk; + +/* + NUC505 TinyUSB API driver implementation +*/ + +void dcd_init(uint8_t rhport) +{ + (void) rhport; + + /* configure interrupts in their initial state; BUSINTEN and CEPINTEN will be subsequently and dynamically re-written as needed */ + USBD->GINTEN = enabled_irqs; + USBD->BUSINTEN = USBD_BUSINTEN_RSTIEN_Msk | USBD_BUSINTEN_VBUSDETIEN_Msk | USBD_BUSINTEN_RESUMEIEN_Msk | USBD_BUSINTEN_DMADONEIEN_Msk; + USBD->CEPINTEN = 0; + + bus_reset(); + + usb_attach(); +} + +void dcd_int_enable(uint8_t rhport) +{ + (void) rhport; + NVIC_EnableIRQ(USBD_IRQn); +} + +void dcd_int_disable(uint8_t rhport) +{ + (void) rhport; + NVIC_DisableIRQ(USBD_IRQn); +} + +void dcd_set_address(uint8_t rhport, uint8_t dev_addr) +{ + (void) rhport; + usb_control_send_zlp(); /* SET_ADDRESS is the one exception where TinyUSB doesn't use dcd_edpt_xfer() to generate a ZLP */ + assigned_address = dev_addr; +} + +void dcd_remote_wakeup(uint8_t rhport) +{ + (void) rhport; + USBD->OPER |= USBD_OPER_RESUMEEN_Msk; +} + +bool dcd_edpt_open(uint8_t rhport, tusb_desc_endpoint_t const * p_endpoint_desc) +{ + (void) rhport; + + USBD_EP_T *ep = ep_entry(p_endpoint_desc->bEndpointAddress, true); + TU_ASSERT(ep); + + /* mine the data for the information we need */ + int const dir = tu_edpt_dir(p_endpoint_desc->bEndpointAddress); + int const size = p_endpoint_desc->wMaxPacketSize.size; + tusb_xfer_type_t const type = p_endpoint_desc->bmAttributes.xfer; + struct xfer_ctl_t *xfer = &xfer_table[ep - USBD->EP]; + + /* allocate buffer from USB RAM */ + ep->EPBUFSTART = bufseg_addr; + bufseg_addr += size; + ep->EPBUFEND = bufseg_addr - 1; + TU_ASSERT(bufseg_addr <= USBD_BUF_SIZE); + + ep->EPMPS = size; + + ep->EPRSPCTL = USB_EP_RSPCTL_FLUSH | eprspctl_eptype_table[type]; + + /* construct USB Configuration Register value and then write it */ + uint32_t cfg = (uint32_t)tu_edpt_number(p_endpoint_desc->bEndpointAddress) << USBD_EPCFG_EPNUM_Pos; + if (TUSB_DIR_IN == dir) + cfg |= USBD_EPCFG_EPDIR_Msk; + cfg |= epcfg_eptype_table[type] | USBD_EPCFG_EPEN_Msk; + ep->EPCFG = cfg; + + /* make a note of the endpoint particulars */ + xfer->max_packet_size = size; + xfer->ep_addr = p_endpoint_desc->bEndpointAddress; + + return true; +} + +bool dcd_edpt_xfer(uint8_t rhport, uint8_t ep_addr, uint8_t *buffer, uint16_t total_bytes) +{ + (void) rhport; + + if (0x80 == ep_addr) /* control EP0 IN */ + { + if (total_bytes) + { + USBD->CEPCTL = USBD_CEPCTL_FLUSH_Msk; + ctrl_in_xfer.data_ptr = buffer; + ctrl_in_xfer.in_remaining_bytes = total_bytes; + ctrl_in_xfer.total_bytes = total_bytes; + USBD->CEPINTSTS = USBD_CEPINTSTS_INTKIF_Msk; + USBD->CEPINTEN = USBD_CEPINTEN_INTKIEN_Msk; + } + else + { + usb_control_send_zlp(); + } + } + else if (0x00 == ep_addr) /* control EP0 OUT */ + { + if (total_bytes) + { + /* if TinyUSB is asking for EP0 OUT data, it is almost certainly already in the buffer */ + while (total_bytes < USBD->CEPRXCNT); + for (int count = 0; count < total_bytes; count++) + *buffer++ = USBD->CEPDAT_BYTE; + + dcd_event_xfer_complete(0, ep_addr, total_bytes, XFER_RESULT_SUCCESS, true); + } + } + else + { + /* mine the data for the information we need */ + tusb_dir_t dir = tu_edpt_dir(ep_addr); + USBD_EP_T *ep = ep_entry(ep_addr, false); + struct xfer_ctl_t *xfer = &xfer_table[ep - USBD->EP]; + + /* store away the information we'll needing now and later */ + xfer->data_ptr = buffer; + // xfer->ff = NULL; // TODO support dcd_edpt_xfer_fifo API + xfer->in_remaining_bytes = total_bytes; + xfer->total_bytes = total_bytes; + + if (TUSB_DIR_IN == dir) + { + ep->EPINTEN = USBD_EPINTEN_BUFEMPTYIEN_Msk; + } + else + { + xfer->out_bytes_so_far = 0; + ep->EPINTEN = USBD_EPINTEN_RXPKIEN_Msk; + } + } + + return true; +} + +#if 0 // TODO support dcd_edpt_xfer_fifo API +bool dcd_edpt_xfer_fifo (uint8_t rhport, uint8_t ep_addr, tu_fifo_t * ff, uint16_t total_bytes) +{ + (void) rhport; + + TU_ASSERT(0x80 != ep_addr && 0x00 != ep_addr); // Must not be used for control stuff + + /* mine the data for the information we need */ + tusb_dir_t dir = tu_edpt_dir(ep_addr); + USBD_EP_T *ep = ep_entry(ep_addr, false); + struct xfer_ctl_t *xfer = &xfer_table[ep - USBD->EP]; + + /* store away the information we'll needing now and later */ + xfer->data_ptr = NULL; // Indicates a FIFO shall be used + xfer->ff = ff; + xfer->in_remaining_bytes = total_bytes; + xfer->total_bytes = total_bytes; + + if (TUSB_DIR_IN == dir) + { + ep->EPINTEN = USBD_EPINTEN_BUFEMPTYIEN_Msk; + } + else + { + xfer->out_bytes_so_far = 0; + ep->EPINTEN = USBD_EPINTEN_RXPKIEN_Msk; + } + + return true; +} +#endif + +void dcd_edpt_stall(uint8_t rhport, uint8_t ep_addr) +{ + (void) rhport; + + if (tu_edpt_number(ep_addr)) + { + USBD_EP_T *ep = ep_entry(ep_addr, false); + ep->EPRSPCTL = (ep->EPRSPCTL & 0xf7) | USBD_EPRSPCTL_HALT_Msk; + } + else + { + USBD->CEPCTL = USBD_CEPCTL_STALLEN_Msk; + } +} + +void dcd_edpt_clear_stall(uint8_t rhport, uint8_t ep_addr) +{ + (void) rhport; + + if (tu_edpt_number(ep_addr)) + { + USBD_EP_T *ep = ep_entry(ep_addr, false); + ep->EPRSPCTL = USBD_EPRSPCTL_TOGGLE_Msk; + } +} + +void dcd_int_handler(uint8_t rhport) +{ + (void) rhport; + + uint32_t status = USBD->GINTSTS; + + /* USB interrupt */ + if (status & USBD_GINTSTS_USBIF_Msk) + { + uint32_t bus_state = USBD->BUSINTSTS; + + if (bus_state & USBD_BUSINTSTS_SOFIF_Msk) + { + /* Start-Of-Frame event */ + dcd_event_bus_signal(0, DCD_EVENT_SOF, true); + } + + if (bus_state & USBD_BUSINTSTS_RSTIF_Msk) + { + bus_reset(); + + USBD->CEPINTEN = USBD_CEPINTEN_SETUPPKIEN_Msk; + USBD->BUSINTEN = USBD_BUSINTEN_RSTIEN_Msk | USBD_BUSINTEN_RESUMEIEN_Msk | USBD_BUSINTEN_SUSPENDIEN_Msk | USBD_BUSINTEN_DMADONEIEN_Msk; + USBD->CEPINTSTS = 0x1ffc; + + tusb_speed_t speed = (USBD->OPER & USBD_OPER_CURSPD_Msk) ? TUSB_SPEED_HIGH : TUSB_SPEED_FULL; + dcd_event_bus_reset(0, speed, true); + } + + if (bus_state & USBD_BUSINTSTS_RESUMEIF_Msk) + { + USBD->BUSINTEN = USBD_BUSINTEN_RSTIEN_Msk | USBD_BUSINTEN_SUSPENDIEN_Msk | USBD_BUSINTEN_DMADONEIEN_Msk; + dcd_event_bus_signal(0, DCD_EVENT_RESUME, true); + } + + if (bus_state & USBD_BUSINTSTS_SUSPENDIF_Msk) + { + USBD->BUSINTEN = USBD_BUSINTEN_RSTIEN_Msk | USBD_BUSINTEN_RESUMEIEN_Msk | USBD_BUSINTEN_DMADONEIEN_Msk; + dcd_event_bus_signal(0, DCD_EVENT_SUSPEND, true); + } + + if (bus_state & USBD_BUSINTSTS_HISPDIF_Msk) + { + USBD->CEPINTEN = USBD_CEPINTEN_SETUPPKIEN_Msk; + } + + if (bus_state & USBD_BUSINTSTS_DMADONEIF_Msk) + { +#if USE_DMA + if (current_dma_xfer) + { + current_dma_xfer->dma_requested = false; + + uint16_t available_bytes = USBD->DMACNT & USBD_DMACNT_DMACNT_Msk; + + /* if the most recent DMA finishes the transfer, alert TinyUSB; otherwise, the next RXPKIF/INTKIF endpoint interrupt will prompt the next DMA */ + if ( (current_dma_xfer->total_bytes == current_dma_xfer->out_bytes_so_far) || (available_bytes < current_dma_xfer->max_packet_size) ) + { + dcd_event_xfer_complete(0, current_dma_xfer->ep_addr, current_dma_xfer->out_bytes_so_far, XFER_RESULT_SUCCESS, true); + } + + current_dma_xfer = NULL; + service_dma(); + } +#endif + } + + if (bus_state & USBD_BUSINTSTS_VBUSDETIF_Msk) + { + if (USBD->PHYCTL & USBD_PHYCTL_VBUSDET_Msk) + { + /* USB connect */ + USBD->PHYCTL |= USBD_PHYCTL_PHYEN_Msk | USBD_PHYCTL_DPPUEN_Msk; + } + else + { + /* USB disconnect */ + USBD->PHYCTL &= ~USBD_PHYCTL_DPPUEN_Msk; + } + } + + USBD->BUSINTSTS = bus_state & (USBD_BUSINTSTS_SOFIF_Msk | USBD_BUSINTSTS_RSTIF_Msk | USBD_BUSINTSTS_RESUMEIF_Msk | USBD_BUSINTSTS_SUSPENDIF_Msk | USBD_BUSINTSTS_HISPDIF_Msk | USBD_BUSINTSTS_DMADONEIF_Msk | USBD_BUSINTSTS_PHYCLKVLDIF_Msk | USBD_BUSINTSTS_VBUSDETIF_Msk); + } + + if (status & USBD_GINTSTS_CEPIF_Msk) + { + uint32_t cep_state = USBD->CEPINTSTS & USBD->CEPINTEN; + + if (cep_state & USBD_CEPINTSTS_SETUPPKIF_Msk) + { + /* get SETUP packet from USB buffer */ + uint8_t setup_packet[8]; + setup_packet[0] = (uint8_t)(USBD->SETUP1_0 >> 0); + setup_packet[1] = (uint8_t)(USBD->SETUP1_0 >> 8); + setup_packet[2] = (uint8_t)(USBD->SETUP3_2 >> 0); + setup_packet[3] = (uint8_t)(USBD->SETUP3_2 >> 8); + setup_packet[4] = (uint8_t)(USBD->SETUP5_4 >> 0); + setup_packet[5] = (uint8_t)(USBD->SETUP5_4 >> 8); + setup_packet[6] = (uint8_t)(USBD->SETUP7_6 >> 0); + setup_packet[7] = (uint8_t)(USBD->SETUP7_6 >> 8); + dcd_event_setup_received(0, setup_packet, true); + } + else if (cep_state & USBD_CEPINTSTS_INTKIF_Msk) + { + USBD->CEPINTSTS = USBD_CEPINTSTS_TXPKIF_Msk; + + if (!(cep_state & USBD_CEPINTSTS_STSDONEIF_Msk)) + { + USBD->CEPINTEN = USBD_CEPINTEN_TXPKIEN_Msk; + uint16_t bytes_now = tu_min16(ctrl_in_xfer.in_remaining_bytes, CFG_TUD_ENDPOINT0_SIZE); + for (int count = 0; count < bytes_now; count++) + USBD->CEPDAT_BYTE = *ctrl_in_xfer.data_ptr++; + ctrl_in_xfer.in_remaining_bytes -= bytes_now; + USBD_START_CEP_IN(bytes_now); + } + else + { + USBD->CEPINTEN = USBD_CEPINTEN_TXPKIEN_Msk | USBD_CEPINTEN_STSDONEIEN_Msk; + } + } + else if (cep_state & USBD_CEPINTSTS_TXPKIF_Msk) + { + USBD->CEPINTSTS = USBD_CEPINTSTS_STSDONEIF_Msk; + USBD_SET_CEP_STATE(USB_CEPCTL_NAKCLR); + + /* alert TinyUSB that the EP0 IN transfer has finished */ + if ( (0 == ctrl_in_xfer.in_remaining_bytes) || (0 == ctrl_in_xfer.total_bytes) ) + dcd_event_xfer_complete(0, 0x80, ctrl_in_xfer.total_bytes, XFER_RESULT_SUCCESS, true); + + if (ctrl_in_xfer.in_remaining_bytes) + { + USBD->CEPINTSTS = USBD_CEPINTSTS_INTKIF_Msk; + USBD->CEPINTEN = USBD_CEPINTEN_INTKIEN_Msk; + } + else + { + /* TinyUSB does its own fragmentation and ZLP for EP0; a transfer of zero means a ZLP */ + if (0 == ctrl_in_xfer.total_bytes) USBD->CEPCTL = USBD_CEPCTL_ZEROLEN_Msk; + + USBD->CEPINTSTS = USBD_CEPINTSTS_STSDONEIF_Msk; + USBD->CEPINTEN = USBD_CEPINTEN_SETUPPKIEN_Msk | USBD_CEPINTEN_STSDONEIEN_Msk; + } + } + else if (cep_state & USBD_CEPINTSTS_STSDONEIF_Msk) + { + /* given ACK from host has happened, we can now set the address (if not already done) */ + if((USBD->FADDR != assigned_address) && (USBD->FADDR == 0)) + { + USBD->FADDR = assigned_address; + + for (enum ep_enum ep_index = PERIPH_EPA; ep_index < PERIPH_MAX_EP; ep_index++) + { + if (USBD->EP[ep_index].EPCFG & USBD_EPCFG_EPEN_Msk) USBD->EP[ep_index].EPRSPCTL = USBD_EPRSPCTL_TOGGLE_Msk; + } + } + + USBD->CEPINTEN = USBD_CEPINTEN_SETUPPKIEN_Msk; + } + + USBD->CEPINTSTS = cep_state; + + return; + } + + if (status & (USBD_GINTSTS_EPAIF_Msk | USBD_GINTSTS_EPBIF_Msk | USBD_GINTSTS_EPCIF_Msk | USBD_GINTSTS_EPDIF_Msk | USBD_GINTSTS_EPEIF_Msk | USBD_GINTSTS_EPFIF_Msk | USBD_GINTSTS_EPGIF_Msk | USBD_GINTSTS_EPHIF_Msk | USBD_GINTSTS_EPIIF_Msk | USBD_GINTSTS_EPJIF_Msk | USBD_GINTSTS_EPKIF_Msk | USBD_GINTSTS_EPLIF_Msk)) + { + /* service PERIPH_EPA through PERIPH_EPL */ + enum ep_enum ep_index; + uint32_t mask; + struct xfer_ctl_t *xfer; + USBD_EP_T *ep; + for (ep_index = PERIPH_EPA, mask = USBD_GINTSTS_EPAIF_Msk, xfer = &xfer_table[PERIPH_EPA], ep = &USBD->EP[PERIPH_EPA]; ep_index < PERIPH_MAX_EP; ep_index++, mask <<= 1, xfer++, ep++) + { + if(status & mask) + { + uint8_t const ep_addr = xfer->ep_addr; + bool const out_ep = !(ep_addr & TUSB_DIR_IN_MASK); + uint32_t ep_state = ep->EPINTSTS & ep->EPINTEN; + + if (out_ep) + { +#if USE_DMA + xfer->dma_requested = true; + service_dma(); +#else + uint16_t const available_bytes = ep->EPDATCNT & USBD_EPDATCNT_DATCNT_Msk; + /* copy the data from the PC to the previously provided buffer */ +#if 0 // TODO support dcd_edpt_xfer_fifo API + if (xfer->ff) + { + tu_fifo_write_n_const_addr_full_words(xfer->ff, (const void *) &ep->EPDAT_BYTE, tu_min16(available_bytes, xfer->total_bytes - xfer->out_bytes_so_far)); + } + else +#endif + { + for (int count = 0; (count < available_bytes) && (xfer->out_bytes_so_far < xfer->total_bytes); count++, xfer->out_bytes_so_far++) + { + *xfer->data_ptr++ = ep->EPDAT_BYTE; + } + } + + /* when the transfer is finished, alert TinyUSB; otherwise, continue accepting more data */ + if ( (xfer->total_bytes == xfer->out_bytes_so_far) || (available_bytes < xfer->max_packet_size) ) + { + dcd_event_xfer_complete(0, ep_addr, xfer->out_bytes_so_far, XFER_RESULT_SUCCESS, true); + } +#endif + + } + else if (ep_state & USBD_EPINTSTS_BUFEMPTYIF_Msk) + { + /* send any remaining data */ + dcd_userEP_in_xfer(xfer, ep); + } + else if (ep_state & USBD_EPINTSTS_TXPKIF_Msk) + { + /* alert TinyUSB that we've finished */ + dcd_event_xfer_complete(0, ep_addr, xfer->total_bytes, XFER_RESULT_SUCCESS, true); + ep->EPINTEN = 0; + } + + ep->EPINTSTS = ep_state; + } + } + } +} + +void dcd_disconnect(uint8_t rhport) +{ + (void) rhport; + usb_detach(); +} + +void dcd_connect(uint8_t rhport) +{ + (void) rhport; + usb_attach(); +} + +#endif |