circuitpython/ports/mimxrt10xx/supervisor/usb.c

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/*
* 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/linker.h"
#include "supervisor/usb.h"
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#include "imx_usb.h"
void init_usb_instance(mp_int_t instance) {
if (instance < 0) {
return;
}
USBPHY_Type *usb_phy;
#ifdef USBPHY2
if (instance == 0) {
usb_phy = USBPHY1;
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#else
(void)instance;
usb_phy = USBPHY;
#endif
CLOCK_EnableUsbhs0PhyPllClock(kCLOCK_Usbphy480M, 480000000U);
CLOCK_EnableUsbhs0Clock(kCLOCK_Usb480M, 480000000U);
#ifdef USBPHY2
} else if (instance == 1) {
CLOCK_EnableUsbhs1PhyPllClock(kCLOCK_Usbphy480M, 480000000U);
CLOCK_EnableUsbhs1Clock(kCLOCK_Usb480M, 480000000U);
usb_phy = USBPHY2;
} else {
// Unsupported instance
return;
}
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#endif
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// 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;
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// 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;
}
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void init_usb_hardware(void) {
init_usb_instance(CIRCUITPY_USB_DEVICE_INSTANCE);
}
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// Provide the prototypes for the interrupt handlers. The iMX RT SDK doesn't.
// The SDK only links to them from assembly.
#ifdef MIMXRT1042_SERIES
void USB_OTG_IRQHandler(void);
void PLACE_IN_ITCM(USB_OTG_IRQHandler)(void) {
#else
void USB_OTG1_IRQHandler(void);
void PLACE_IN_ITCM(USB_OTG1_IRQHandler)(void) {
#endif
usb_irq_handler(0);
}
#ifdef USBPHY2
void USB_OTG2_IRQHandler(void);
void PLACE_IN_ITCM(USB_OTG2_IRQHandler)(void) {
usb_irq_handler(1);
}
#endif