circuitpython/ports/mimxrt10xx/supervisor/usb.c

/*
 * This file is part of the MicroPython project, http://micropython.org/
 *
 * The MIT License (MIT)
 *
 * Copyright (c) 2017, 2018 Scott Shawcroft for Adafruit Industries
 * Copyright (c) 2019 Artur Pacholec
 *
 * 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 "fsl_clock.h"
#include "tusb.h"
#include "supervisor/usb.h"

void init_usb_hardware(void) {
    CLOCK_EnableUsbhs0PhyPllClock(kCLOCK_Usbphy480M, 480000000U);
    CLOCK_EnableUsbhs0Clock(kCLOCK_Usb480M, 480000000U);

#ifdef USBPHY
    USBPHY_Type *usb_phy = USBPHY;
#else
    USBPHY_Type *usb_phy = USBPHY1;
#endif

    // Enable PHY support for Low speed device + LS via FS Hub
    usb_phy->CTRL |= USBPHY_CTRL_SET_ENUTMILEVEL2_MASK | USBPHY_CTRL_SET_ENUTMILEVEL3_MASK;

    // Enable all power for normal operation
    usb_phy->PWD = 0;

    // TX Timing
    uint32_t phytx = usb_phy->TX;
    phytx &= ~(USBPHY_TX_D_CAL_MASK | USBPHY_TX_TXCAL45DM_MASK | USBPHY_TX_TXCAL45DP_MASK);
    phytx |= USBPHY_TX_D_CAL(0x0C) | USBPHY_TX_TXCAL45DP(0x06) | USBPHY_TX_TXCAL45DM(0x06);
    usb_phy->TX = phytx;

    // Temporarily disable the data cache until we can sort out all of the spots in TinyUSB that
    // need the cache invalidated or cleaned.
    SCB_DisableDCache();
}

void USB_OTG1_IRQHandler(void) {
    usb_irq_handler();
}