circuitpython/ports/atmel-samd/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
 *
 * 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 "atmel_start_pins.h"
#include "hpl/pm/hpl_pm_base.h"
#include "hpl/gclk/hpl_gclk_base.h"
#include "hal_gpio.h"
#include "lib/tinyusb/src/device/usbd.h"
#include "supervisor/background_callback.h"
#include "supervisor/usb.h"

void init_usb_hardware(void) {
    #ifdef SAMD21
    _pm_enable_bus_clock(PM_BUS_APBB, USB);
    _pm_enable_bus_clock(PM_BUS_AHB, USB);
    _gclk_enable_channel(USB_GCLK_ID, GCLK_CLKCTRL_GEN_GCLK0_Val);
    #endif

    #ifdef SAM_D5X_E5X
    hri_gclk_write_PCHCTRL_reg(GCLK, USB_GCLK_ID, GCLK_PCHCTRL_GEN_GCLK1_Val | GCLK_PCHCTRL_CHEN);
    hri_mclk_set_AHBMASK_USB_bit(MCLK);
    hri_mclk_set_APBBMASK_USB_bit(MCLK);
    #endif

    gpio_set_pin_direction(PIN_PA24, GPIO_DIRECTION_OUT);
    gpio_set_pin_level(PIN_PA24, false);
    gpio_set_pin_pull_mode(PIN_PA24, GPIO_PULL_OFF);
    gpio_set_pin_direction(PIN_PA25, GPIO_DIRECTION_OUT);
    gpio_set_pin_level(PIN_PA25, false);
    gpio_set_pin_pull_mode(PIN_PA25, GPIO_PULL_OFF);
    #ifdef SAMD21
    gpio_set_pin_function(PIN_PA24, PINMUX_PA24G_USB_DM);
    gpio_set_pin_function(PIN_PA25, PINMUX_PA25G_USB_DP);
    #endif
    #ifdef SAM_D5X_E5X
    gpio_set_pin_function(PIN_PA24, PINMUX_PA24H_USB_DM);
    gpio_set_pin_function(PIN_PA25, PINMUX_PA25H_USB_DP);
    #endif
}

#ifdef SAMD21
void USB_Handler(void) {
    usb_irq_handler(0);
}
#endif

#ifdef SAM_D5X_E5X
// These are different subsets of USB interrupts, *NOT* different USB peripherals.
void USB_0_Handler(void) {
    usb_irq_handler(0);
}

void USB_1_Handler(void) {
    usb_irq_handler(0);
}

void USB_2_Handler(void) {
    usb_irq_handler(0);
}

void USB_3_Handler(void) {
    usb_irq_handler(0);
}
#endif