diff options
Diffstat (limited to 'src/portable/microchip/samd21/dcd_samd21.c')
| -rw-r--r-- | src/portable/microchip/samd21/dcd_samd21.c | 343 |
1 files changed, 0 insertions, 343 deletions
diff --git a/src/portable/microchip/samd21/dcd_samd21.c b/src/portable/microchip/samd21/dcd_samd21.c deleted file mode 100644 index 231abc7d0..000000000 --- a/src/portable/microchip/samd21/dcd_samd21.c +++ /dev/null @@ -1,343 +0,0 @@ -/* - * 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" - -/*------------------------------------------------------------------*/ -/* MACRO TYPEDEF CONSTANT ENUM - *------------------------------------------------------------------*/ -static TU_ATTR_ALIGNED(4) UsbDeviceDescBank sram_registers[8][2]; -static TU_ATTR_ALIGNED(4) uint8_t _setup_packet[8]; - -// 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_Handler(void) -{ - uint32_t int_status = USB->DEVICE.INTFLAG.reg & USB->DEVICE.INTENSET.reg; - USB->DEVICE.INTFLAG.reg = int_status; // clear interrupt - - /*------------- 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(); -} - -#endif |