139 lines
4.2 KiB
C
139 lines
4.2 KiB
C
/**************************************************************************/
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/*!
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@file usb.c
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@author hathach (tinyusb.org)
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@section LICENSE
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Software License Agreement (BSD License)
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Copyright (c) 2018, Adafruit Industries (adafruit.com)
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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3. Neither the name of the copyright holders nor the
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names of its contributors may be used to endorse or promote products
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derived from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY
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EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY
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DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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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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//--------------------------------------------------------------------+
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// MACRO TYPEDEF CONSTANT ENUM DECLARATION
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//--------------------------------------------------------------------+
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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(void)
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{
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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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// 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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}
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void tud_umount_cb(void)
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{
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}
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