156 lines
4.4 KiB
C
156 lines
4.4 KiB
C
/*
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* The MIT License (MIT)
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*
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* Copyright (c) 2018 Ha Thach for Adafruit Industries
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "nrfx.h"
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#include "nrfx_power.h"
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#ifdef SOFTDEVICE_PRESENT
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#include "nrf_sdm.h"
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#include "nrf_soc.h"
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#endif
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#include "nrf_usbd.h"
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#include "tusb.h"
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#include "usb_desc.h"
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#include "boards.h"
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//--------------------------------------------------------------------+
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// MACRO TYPEDEF CONSTANT ENUM DECLARATION
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//--------------------------------------------------------------------+
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// from usb_desc.c for dynamic descriptor
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extern tusb_desc_device_t usb_desc_dev;
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extern usb_desc_cfg_t usb_desc_cfg;
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// Serial string using unique Device ID
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extern uint16_t usb_desc_str_serial[1+16];
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/* tinyusb function that handles power event (detected, ready, removed)
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* We must call it within SD's SOC event handler, or set it as power event handler if SD is not enabled. */
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extern void tusb_hal_nrf_power_event(uint32_t event);
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//------------- IMPLEMENTATION -------------//
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void usb_init(bool cdc_only)
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{
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NVIC_SetPriority(USBD_IRQn, 2);
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// USB power may already be ready at this time -> no event generated
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// We need to invoke the handler based on the status initially
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uint32_t usb_reg;
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#ifdef SOFTDEVICE_PRESENT
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uint8_t sd_en = false;
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(void) sd_softdevice_is_enabled(&sd_en);
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if ( sd_en ) {
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sd_power_usbdetected_enable(true);
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sd_power_usbpwrrdy_enable(true);
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sd_power_usbremoved_enable(true);
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sd_power_usbregstatus_get(&usb_reg);
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}else
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#endif
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{
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// Power module init
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const nrfx_power_config_t pwr_cfg = { 0 };
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nrfx_power_init(&pwr_cfg);
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// Register tusb function as USB power handler
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const nrfx_power_usbevt_config_t config = { .handler = (nrfx_power_usb_event_handler_t) tusb_hal_nrf_power_event };
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nrfx_power_usbevt_init(&config);
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nrfx_power_usbevt_enable();
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usb_reg = NRF_POWER->USBREGSTATUS;
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}
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if ( usb_reg & POWER_USBREGSTATUS_VBUSDETECT_Msk ) {
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tusb_hal_nrf_power_event(NRFX_POWER_USB_EVT_DETECTED);
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}
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if ( usb_reg & POWER_USBREGSTATUS_OUTPUTRDY_Msk ) {
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tusb_hal_nrf_power_event(NRFX_POWER_USB_EVT_READY);
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}
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if ( cdc_only )
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{
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// Change PID to CDC only
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usb_desc_dev.idProduct = USB_DESC_SERIAL_ONLY_PID;
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// Remove MSC interface = reduce total interface + adjust config desc length
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usb_desc_cfg.config.bNumInterfaces--;
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usb_desc_cfg.config.wTotalLength -= sizeof(usb_desc_cfg.msc);
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}
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// Create Serial string descriptor
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char tmp_serial[17];
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sprintf(tmp_serial, "%08lX%08lX", NRF_FICR->DEVICEID[1], NRF_FICR->DEVICEID[0]);
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for(uint8_t i=0; i<16; i++)
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{
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usb_desc_str_serial[1+i] = tmp_serial[i];
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}
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// Init tusb stack
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tusb_init();
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}
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void usb_teardown(void)
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{
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if ( NRF_USBD->ENABLE )
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{
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// Abort all transfers
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// Disable pull up
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nrf_usbd_pullup_disable();
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// Disable Interrupt
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NVIC_DisableIRQ(USBD_IRQn);
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// disable all interrupt
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NRF_USBD->INTENCLR = NRF_USBD->INTEN;
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nrf_usbd_disable();
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sd_clock_hfclk_release();
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sd_power_usbdetected_enable(false);
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sd_power_usbpwrrdy_enable(false);
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sd_power_usbremoved_enable(false);
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}
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}
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//--------------------------------------------------------------------+
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// tinyusb callbacks
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//--------------------------------------------------------------------+
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void tud_mount_cb(void)
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{
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led_state(STATE_USB_MOUNTED);
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}
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void tud_umount_cb(void)
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{
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led_state(STATE_USB_UNMOUNTED);
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}
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