/* * The MIT License (MIT) * * Copyright (c) 2018 Scott Shawcroft for Adafruit Industries * * 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. */ #include "tusb_option.h" #if TUSB_OPT_DEVICE_ENABLED && CFG_TUSB_MCU == OPT_MCU_SAMD21 #include "device/dcd.h" #include "sam.h" #include "osal/osal.h" /*------------------------------------------------------------------*/ /* MACRO TYPEDEF CONSTANT ENUM *------------------------------------------------------------------*/ static TU_ATTR_ALIGNED(4) UsbDeviceDescBank sram_registers[8][2]; static TU_ATTR_ALIGNED(4) uint8_t _setup_packet[8]; //--------------------- // Forward declarations //--------------------- void maybe_transfer_complete(void); void USB_IRQHandler(void); //===================== // Setup the control endpoint 0. static void bus_reset(void) { // Max size of packets is 64 bytes. UsbDeviceDescBank* bank_out = &sram_registers[0][TUSB_DIR_OUT]; bank_out->PCKSIZE.bit.SIZE = 0x3; UsbDeviceDescBank* bank_in = &sram_registers[0][TUSB_DIR_IN]; bank_in->PCKSIZE.bit.SIZE = 0x3; UsbDeviceEndpoint* ep = &USB->DEVICE.DeviceEndpoint[0]; ep->EPCFG.reg = USB_DEVICE_EPCFG_EPTYPE0(0x1) | USB_DEVICE_EPCFG_EPTYPE1(0x1); ep->EPINTENSET.reg = USB_DEVICE_EPINTENSET_TRCPT0 | USB_DEVICE_EPINTENSET_TRCPT1 | USB_DEVICE_EPINTENSET_RXSTP; // Prepare for setup packet dcd_edpt_xfer(0, 0, _setup_packet, sizeof(_setup_packet)); } /*------------------------------------------------------------------*/ /* Controller API *------------------------------------------------------------------*/ void dcd_init (uint8_t rhport) { (void) rhport; // Reset to get in a clean state. USB->DEVICE.CTRLA.bit.SWRST = true; while (USB->DEVICE.SYNCBUSY.bit.SWRST == 0) {} while (USB->DEVICE.SYNCBUSY.bit.SWRST == 1) {} USB->DEVICE.PADCAL.bit.TRANSP = (*((uint32_t*) USB_FUSES_TRANSP_ADDR) & USB_FUSES_TRANSP_Msk) >> USB_FUSES_TRANSP_Pos; USB->DEVICE.PADCAL.bit.TRANSN = (*((uint32_t*) USB_FUSES_TRANSN_ADDR) & USB_FUSES_TRANSN_Msk) >> USB_FUSES_TRANSN_Pos; USB->DEVICE.PADCAL.bit.TRIM = (*((uint32_t*) USB_FUSES_TRIM_ADDR) & USB_FUSES_TRIM_Msk) >> USB_FUSES_TRIM_Pos; USB->DEVICE.QOSCTRL.bit.CQOS = USB_QOSCTRL_CQOS_HIGH_Val; USB->DEVICE.QOSCTRL.bit.DQOS = USB_QOSCTRL_DQOS_HIGH_Val; // Configure registers USB->DEVICE.DESCADD.reg = (uint32_t) &sram_registers; USB->DEVICE.CTRLB.reg = USB_DEVICE_CTRLB_SPDCONF_FS; USB->DEVICE.CTRLA.reg = USB_CTRLA_MODE_DEVICE | USB_CTRLA_ENABLE | USB_CTRLA_RUNSTDBY; while (USB->DEVICE.SYNCBUSY.bit.ENABLE == 1) {} USB->DEVICE.INTFLAG.reg |= USB->DEVICE.INTFLAG.reg; // clear pending USB->DEVICE.INTENSET.reg = USB_DEVICE_INTENSET_SOF | USB_DEVICE_INTENSET_EORST; } void dcd_int_enable(uint8_t rhport) { (void) rhport; NVIC_EnableIRQ(USB_IRQn); } void dcd_int_disable(uint8_t rhport) { (void) rhport; NVIC_DisableIRQ(USB_IRQn); } void dcd_set_address (uint8_t rhport, uint8_t dev_addr) { // Response with status first before changing device address dcd_edpt_xfer(rhport, tu_edpt_addr(0, TUSB_DIR_IN), NULL, 0); // Wait for EP0 to finish before switching the address. while (USB->DEVICE.DeviceEndpoint[0].EPSTATUS.bit.BK1RDY == 1) {} USB->DEVICE.DADD.reg = USB_DEVICE_DADD_DADD(dev_addr) | USB_DEVICE_DADD_ADDEN; // Enable SUSPEND interrupt since the bus signal D+/D- are stable now. USB->DEVICE.INTFLAG.reg = USB_DEVICE_INTENCLR_SUSPEND; // clear pending USB->DEVICE.INTENSET.reg = USB_DEVICE_INTENSET_SUSPEND; } void dcd_set_config (uint8_t rhport, uint8_t config_num) { (void) rhport; (void) config_num; // Nothing to do } void dcd_remote_wakeup(uint8_t rhport) { (void) rhport; USB->DEVICE.CTRLB.bit.UPRSM = 1; } /*------------------------------------------------------------------*/ /* DCD Endpoint port *------------------------------------------------------------------*/ bool dcd_edpt_open (uint8_t rhport, tusb_desc_endpoint_t const * desc_edpt) { (void) rhport; uint8_t const epnum = tu_edpt_number(desc_edpt->bEndpointAddress); uint8_t const dir = tu_edpt_dir(desc_edpt->bEndpointAddress); UsbDeviceDescBank* bank = &sram_registers[epnum][dir]; uint32_t size_value = 0; while (size_value < 7) { if (1 << (size_value + 3) == desc_edpt->wMaxPacketSize.size) { break; } size_value++; } // unsupported endpoint size if ( size_value == 7 && desc_edpt->wMaxPacketSize.size != 1023 ) return false; bank->PCKSIZE.bit.SIZE = size_value; UsbDeviceEndpoint* ep = &USB->DEVICE.DeviceEndpoint[epnum]; if ( dir == TUSB_DIR_OUT ) { ep->EPCFG.bit.EPTYPE0 = desc_edpt->bmAttributes.xfer + 1; ep->EPINTENSET.bit.TRCPT0 = true; }else { ep->EPCFG.bit.EPTYPE1 = desc_edpt->bmAttributes.xfer + 1; ep->EPINTENSET.bit.TRCPT1 = true; } return true; } bool dcd_edpt_xfer (uint8_t rhport, uint8_t ep_addr, uint8_t * buffer, uint16_t total_bytes) { (void) rhport; uint8_t const epnum = tu_edpt_number(ep_addr); uint8_t const dir = tu_edpt_dir(ep_addr); UsbDeviceDescBank* bank = &sram_registers[epnum][dir]; UsbDeviceEndpoint* ep = &USB->DEVICE.DeviceEndpoint[epnum]; // A setup token can occur immediately after an OUT STATUS packet so make sure we have a valid // buffer for the control endpoint. if (epnum == 0 && dir == 0 && buffer == NULL) { buffer = _setup_packet; } bank->ADDR.reg = (uint32_t) buffer; if ( dir == TUSB_DIR_OUT ) { bank->PCKSIZE.bit.MULTI_PACKET_SIZE = total_bytes; bank->PCKSIZE.bit.BYTE_COUNT = 0; ep->EPSTATUSCLR.reg |= USB_DEVICE_EPSTATUSCLR_BK0RDY; ep->EPINTFLAG.reg |= USB_DEVICE_EPINTFLAG_TRFAIL0; } else { bank->PCKSIZE.bit.MULTI_PACKET_SIZE = 0; bank->PCKSIZE.bit.BYTE_COUNT = total_bytes; // bank->PCKSIZE.bit.AUTO_ZLP = 1; ep->EPSTATUSSET.reg |= USB_DEVICE_EPSTATUSSET_BK1RDY; ep->EPINTFLAG.reg |= USB_DEVICE_EPINTFLAG_TRFAIL1; } return true; } void dcd_edpt_stall (uint8_t rhport, uint8_t ep_addr) { (void) rhport; uint8_t const epnum = tu_edpt_number(ep_addr); UsbDeviceEndpoint* ep = &USB->DEVICE.DeviceEndpoint[epnum]; if (tu_edpt_dir(ep_addr) == TUSB_DIR_IN) { ep->EPSTATUSSET.reg = USB_DEVICE_EPSTATUSSET_STALLRQ1; } else { ep->EPSTATUSSET.reg = USB_DEVICE_EPSTATUSSET_STALLRQ0; } } void dcd_edpt_clear_stall (uint8_t rhport, uint8_t ep_addr) { (void) rhport; uint8_t const epnum = tu_edpt_number(ep_addr); UsbDeviceEndpoint* ep = &USB->DEVICE.DeviceEndpoint[epnum]; if (tu_edpt_dir(ep_addr) == TUSB_DIR_IN) { ep->EPSTATUSCLR.reg = USB_DEVICE_EPSTATUSCLR_STALLRQ1 | USB_DEVICE_EPSTATUSCLR_DTGLIN; } else { ep->EPSTATUSCLR.reg = USB_DEVICE_EPSTATUSCLR_STALLRQ0 | USB_DEVICE_EPSTATUSCLR_DTGLOUT; } } /*------------------------------------------------------------------*/ static bool maybe_handle_setup_packet(void) { if (USB->DEVICE.DeviceEndpoint[0].EPINTFLAG.bit.RXSTP) { USB->DEVICE.DeviceEndpoint[0].EPINTFLAG.reg = USB_DEVICE_EPINTFLAG_RXSTP; // This copies the data elsewhere so we can reuse the buffer. dcd_event_setup_received(0, (uint8_t*) sram_registers[0][0].ADDR.reg, true); return true; } return false; } void maybe_transfer_complete(void) { uint32_t epints = USB->DEVICE.EPINTSMRY.reg; for (uint8_t epnum = 0; epnum < USB_EPT_NUM; epnum++) { if ((epints & (1 << epnum)) == 0) { continue; } if (maybe_handle_setup_packet()) { continue; } UsbDeviceEndpoint* ep = &USB->DEVICE.DeviceEndpoint[epnum]; uint32_t epintflag = ep->EPINTFLAG.reg; uint16_t total_transfer_size = 0; // Handle IN completions if ((epintflag & USB_DEVICE_EPINTFLAG_TRCPT1) != 0) { ep->EPINTFLAG.reg = USB_DEVICE_EPINTFLAG_TRCPT1; UsbDeviceDescBank* bank = &sram_registers[epnum][TUSB_DIR_IN]; total_transfer_size = bank->PCKSIZE.bit.BYTE_COUNT; uint8_t ep_addr = epnum | TUSB_DIR_IN_MASK; dcd_event_xfer_complete(0, ep_addr, total_transfer_size, XFER_RESULT_SUCCESS, true); } // Handle OUT completions if ((epintflag & USB_DEVICE_EPINTFLAG_TRCPT0) != 0) { ep->EPINTFLAG.reg = USB_DEVICE_EPINTFLAG_TRCPT0; UsbDeviceDescBank* bank = &sram_registers[epnum][TUSB_DIR_OUT]; total_transfer_size = bank->PCKSIZE.bit.BYTE_COUNT; uint8_t ep_addr = epnum; dcd_event_xfer_complete(0, ep_addr, total_transfer_size, XFER_RESULT_SUCCESS, true); } // Just finished status stage (total size = 0), prepare for next setup packet // TODO could cause issue with actual zero length data used by class such as DFU if (epnum == 0 && total_transfer_size == 0) { dcd_edpt_xfer(0, 0, _setup_packet, sizeof(_setup_packet)); } } } void USB_IRQHandler(void) // Renamed { uint32_t int_status; osal_enter_interrupt(); int_status = USB->DEVICE.INTFLAG.reg & USB->DEVICE.INTENSET.reg; USB->DEVICE.INTFLAG.reg = int_status; // clear interrupt //printf("USB_IRQ %x\r\n", int_status); /*------------- Interrupt Processing -------------*/ if ( int_status & USB_DEVICE_INTFLAG_SOF ) { dcd_event_bus_signal(0, DCD_EVENT_SOF, true); } // SAMD doesn't distinguish between Suspend and Disconnect state. // Both condition will cause SUSPEND interrupt triggered. // To prevent being triggered when D+/D- are not stable, SUSPEND interrupt is only // enabled when we received SET_ADDRESS request and cleared on Bus Reset if ( int_status & USB_DEVICE_INTFLAG_SUSPEND ) { // Enable wakeup interrupt USB->DEVICE.INTFLAG.reg = USB_DEVICE_INTFLAG_WAKEUP; // clear pending USB->DEVICE.INTENSET.reg = USB_DEVICE_INTFLAG_WAKEUP; dcd_event_bus_signal(0, DCD_EVENT_SUSPEND, true); } // Wakeup interrupt is only enabled when we got suspended. // Wakeup interrupt will disable itself if ( int_status & USB_DEVICE_INTFLAG_WAKEUP ) { // disable wakeup interrupt itself USB->DEVICE.INTENCLR.reg = USB_DEVICE_INTFLAG_WAKEUP; dcd_event_bus_signal(0, DCD_EVENT_RESUME, true); } if ( int_status & USB_DEVICE_INTFLAG_EORST ) { // Disable both suspend and wakeup interrupt USB->DEVICE.INTENCLR.reg = USB_DEVICE_INTFLAG_WAKEUP | USB_DEVICE_INTFLAG_SUSPEND; bus_reset(); dcd_event_bus_signal(0, DCD_EVENT_BUS_RESET, true); } // Setup packet received. maybe_handle_setup_packet(); // Handle complete transfer maybe_transfer_complete(); osal_leave_interrupt(); } #endif