circuitpython/ports/nrf/supervisor/usb.c
Scott Shawcroft 83593a1558
Start of USB host API
This allows you to list and explore connected USB devices. It
only stubs out the methods to communicate to endpoints. That will
come in a follow up once TinyUSB has it. (It's in progress.)

Related to #5986
2022-03-07 18:07:25 -08:00

98 lines
3.3 KiB
C

/*
* This file is part of the Micro Python project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2018 hathach 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.
*/
#include "nrfx.h"
#include "nrfx_power.h"
#include "supervisor/usb.h"
#include "shared/runtime/interrupt_char.h"
#include "shared/readline/readline.h"
#include "lib/tinyusb/src/device/usbd.h"
#include "supervisor/background_callback.h"
#ifdef SOFTDEVICE_PRESENT
#include "nrf_sdm.h"
#include "nrf_soc.h"
#endif
// tinyusb function that handles power event (detected, ready, removed)
// We must call it within SD's SOC event handler, or set it as power event handler if SD is not enabled.
extern void tusb_hal_nrf_power_event(uint32_t event);
void init_usb_hardware(void) {
// 2 is max priority (0, 1, and 4 are reserved for SD)
// 5 is max priority that still allows calling SD functions such as
// sd_softdevice_is_enabled
NVIC_SetPriority(USBD_IRQn, 2);
// USB power may already be ready at this time -> no event generated
// We need to invoke the handler based on the status initially for the first call
static bool first_call = true;
uint32_t usb_reg;
#ifdef SOFTDEVICE_PRESENT
uint8_t sd_en = false;
(void)sd_softdevice_is_enabled(&sd_en);
if (sd_en) {
sd_power_usbdetected_enable(true);
sd_power_usbpwrrdy_enable(true);
sd_power_usbremoved_enable(true);
sd_power_usbregstatus_get(&usb_reg);
} else
#endif
{
// Power module init
const nrfx_power_config_t pwr_cfg = { 0 };
nrfx_power_init(&pwr_cfg);
// Register tusb function as USB power handler
const nrfx_power_usbevt_config_t config = { .handler = (nrfx_power_usb_event_handler_t)tusb_hal_nrf_power_event };
nrfx_power_usbevt_init(&config);
nrfx_power_usbevt_enable();
usb_reg = NRF_POWER->USBREGSTATUS;
}
if (first_call) {
first_call = false;
if (usb_reg & POWER_USBREGSTATUS_VBUSDETECT_Msk) {
tusb_hal_nrf_power_event(NRFX_POWER_USB_EVT_DETECTED);
}
if (usb_reg & POWER_USBREGSTATUS_OUTPUTRDY_Msk) {
tusb_hal_nrf_power_event(NRFX_POWER_USB_EVT_READY);
}
}
}
extern void USBD_IRQHandler(void);
void USBD_IRQHandler(void) {
usb_irq_handler(0);
}