circuitpython/ports/stm/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

154 lines
4.8 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
* Copyright (c) 2019 Lucian Copeland 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 "supervisor/usb.h"
#include "shared/runtime/interrupt_char.h"
#include "shared/readline/readline.h"
#include "lib/tinyusb/src/device/usbd.h"
#include "py/mpconfig.h"
#include "common-hal/microcontroller/Pin.h"
STATIC void init_usb_vbus_sense(void) {
#if (BOARD_NO_VBUS_SENSE)
// Disable VBUS sensing
#ifdef USB_OTG_GCCFG_VBDEN
// Deactivate VBUS Sensing B
USB_OTG_FS->GCCFG &= ~USB_OTG_GCCFG_VBDEN;
#if (BOARD_NO_USB_OTG_ID_SENSE)
USB_OTG_FS->GUSBCFG &= ~USB_OTG_GUSBCFG_FHMOD;
USB_OTG_FS->GUSBCFG |= USB_OTG_GUSBCFG_FDMOD;
#endif
// B-peripheral session valid override enable
USB_OTG_FS->GOTGCTL |= USB_OTG_GOTGCTL_BVALOEN;
USB_OTG_FS->GOTGCTL |= USB_OTG_GOTGCTL_BVALOVAL;
#else
USB_OTG_FS->GCCFG |= USB_OTG_GCCFG_NOVBUSSENS;
USB_OTG_FS->GCCFG &= ~USB_OTG_GCCFG_VBUSBSEN;
USB_OTG_FS->GCCFG &= ~USB_OTG_GCCFG_VBUSASEN;
#endif
#else
// Enable VBUS hardware sensing
#ifdef USB_OTG_GCCFG_VBDEN
USB_OTG_FS->GCCFG |= USB_OTG_GCCFG_VBDEN;
#else
USB_OTG_FS->GCCFG &= ~USB_OTG_GCCFG_NOVBUSSENS;
USB_OTG_FS->GCCFG |= USB_OTG_GCCFG_VBUSBSEN; // B Device sense
#endif
#endif
}
void init_usb_hardware(void) {
/* Enable USB power on Pwrctrl CR2 register */
#ifdef PWR_CR2_USV
HAL_PWREx_EnableVddUSB();
#endif
// TODO: if future chips overload this with options, move to peripherals management.
GPIO_InitTypeDef GPIO_InitStruct = {0};
/**USB_OTG_FS GPIO Configuration
PA10 ------> USB_OTG_FS_ID
PA11 ------> USB_OTG_FS_DM
PA12 ------> USB_OTG_FS_DP
*/
__HAL_RCC_GPIOA_CLK_ENABLE();
/* Configure DM DP Pins */
GPIO_InitStruct.Pin = GPIO_PIN_11 | GPIO_PIN_12;
GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
#if CPY_STM32H7
GPIO_InitStruct.Alternate = GPIO_AF10_OTG1_FS;
#elif CPY_STM32F4 || CPY_STM32F7 || CPY_STM32L4
GPIO_InitStruct.Alternate = GPIO_AF10_OTG_FS;
#endif
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
never_reset_pin_number(0, 11);
never_reset_pin_number(0, 12);
claim_pin(0, 11);
claim_pin(0, 12);
/* Configure VBUS Pin */
#if !(BOARD_NO_VBUS_SENSE)
GPIO_InitStruct.Pin = GPIO_PIN_9;
GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
GPIO_InitStruct.Pull = GPIO_NOPULL;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
never_reset_pin_number(0, 9);
claim_pin(0, 9);
#endif
/* This for ID line debug */
#if !(BOARD_NO_USB_OTG_ID_SENSE)
GPIO_InitStruct.Pin = GPIO_PIN_10;
GPIO_InitStruct.Mode = GPIO_MODE_AF_OD;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
#if CPY_STM32H7
GPIO_InitStruct.Alternate = GPIO_AF10_OTG1_FS;
#elif CPY_STM32F4 || CPY_STM32F7 || CPY_STM32L4
GPIO_InitStruct.Alternate = GPIO_AF10_OTG_FS;
#endif
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
never_reset_pin_number(0, 10);
claim_pin(0, 10);
#endif
#ifdef STM32F412Zx
/* Configure POWER_SWITCH IO pin (F412 ONLY)*/
GPIO_InitStruct.Pin = GPIO_PIN_8;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_OD;
GPIO_InitStruct.Pull = GPIO_NOPULL;
HAL_GPIO_Init(GPIOG, &GPIO_InitStruct);
never_reset_pin_number(0, 8);
claim_pin(0, 8);
#endif
#if CPY_STM32H7
HAL_PWREx_EnableUSBVoltageDetector();
__HAL_RCC_USB2_OTG_FS_CLK_ENABLE();
#else
/* Peripheral clock enable */
__HAL_RCC_USB_OTG_FS_CLK_ENABLE();
#endif
init_usb_vbus_sense();
}
void OTG_FS_IRQHandler(void) {
usb_irq_handler(0);
}