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Add support for analog USBPD on STM32G4xx. (#11824)

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* Add support for analog USBPD on STM32G4xx.

* Split up to a list of driver types, allow for custom.
This commit is contained in:
Nick Brassel 2021-02-15 08:56:13 +11:00 committed by GitHub
parent c27a778281
commit f53e41ac81
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GPG key ID: 4AEE18F83AFDEB23
4 changed files with 133 additions and 0 deletions
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24
common_features.mk
View file

@ -631,3 +631,27 @@ endif
ifeq ($(strip $(JOYSTICK_ENABLE)), digital)
OPT_DEFS += -DDIGITAL_JOYSTICK_ENABLE
endif
USBPD_ENABLE ?= no
VALID_USBPD_DRIVER_TYPES = custom vendor
USBPD_DRIVER ?= vendor
ifeq ($(strip $(USBPD_ENABLE)), yes)
ifeq ($(filter $(strip $(USBPD_DRIVER)),$(VALID_USBPD_DRIVER_TYPES)),)
$(error USBPD_DRIVER="$(USBPD_DRIVER)" is not a valid USBPD driver)
else
OPT_DEFS += -DUSBPD_ENABLE
ifeq ($(strip $(USBPD_DRIVER)), vendor)
# Vendor-specific implementations
OPT_DEFS += -DUSBPD_VENDOR
ifeq ($(strip $(MCU_SERIES)), STM32G4xx)
OPT_DEFS += -DUSBPD_STM32G4
SRC += usbpd_stm32g4.c
else
$(error There is no vendor-provided USBPD driver available)
endif
else ifeq ($(strip $(USBPD_DRIVER)), custom)
OPT_DEFS += -DUSBPD_CUSTOM
# Board designers can add their own driver to $(SRC)
endif
endif
endif

76
drivers/chibios/usbpd_stm32g4.c Normal file
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@ -0,0 +1,76 @@
/* Copyright 2021 Nick Brassel (@tzarc)
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <quantum.h>
#ifndef USBPD_UCPD1_CFG1
# define USBPD_UCPD1_CFG1 (UCPD_CFG1_PSC_UCPDCLK_0 | UCPD_CFG1_TRANSWIN_3 | UCPD_CFG1_IFRGAP_4 | UCPD_CFG1_HBITCLKDIV_4)
#endif // USBPD_UCPD1_CFG1
// Initialises the USBPD subsystem
__attribute__((weak)) void usbpd_init(void) {
// Disable dead-battery signals
PWR->CR3 |= PWR_CR3_UCPD_DBDIS;
// Enable the clock for the UCPD1 peripheral
RCC->APB1ENR2 |= RCC_APB1ENR2_UCPD1EN;
// Copy the existing value
uint32_t CFG1 = UCPD1->CFG1;
// Force-disable UCPD1 before configuring
CFG1 &= ~UCPD_CFG1_UCPDEN;
// Configure UCPD1
CFG1 = USBPD_UCPD1_CFG1;
// Apply the changes
UCPD1->CFG1 = CFG1;
// Enable UCPD1
UCPD1->CFG1 |= UCPD_CFG1_UCPDEN;
// Copy the existing value
uint32_t CR = UCPD1->CR;
// Clear out ANASUBMODE (irrelevant as a sink device)
CR &= ~UCPD_CR_ANASUBMODE_Msk;
// Advertise our capabilities as a sink, with both CC lines enabled
CR |= UCPD_CR_ANAMODE | UCPD_CR_CCENABLE_Msk;
// Apply the changes
UCPD1->CR = CR;
}
// Gets the current state of the USBPD allowance
__attribute__((weak)) usbpd_allowance_t usbpd_get_allowance(void) {
uint32_t CR = UCPD1->CR;
int ucpd_enabled = (UCPD1->CFG1 & UCPD_CFG1_UCPDEN_Msk) >> UCPD_CFG1_UCPDEN_Pos;
int anamode = (CR & UCPD_CR_ANAMODE_Msk) >> UCPD_CR_ANAMODE_Pos;
int cc_enabled = (CR & UCPD_CR_CCENABLE_Msk) >> UCPD_CR_CCENABLE_Pos;
if (ucpd_enabled && anamode && cc_enabled) {
uint32_t SR = UCPD1->SR;
int vstate_cc1 = (SR & UCPD_SR_TYPEC_VSTATE_CC1_Msk) >> UCPD_SR_TYPEC_VSTATE_CC1_Pos;
int vstate_cc2 = (SR & UCPD_SR_TYPEC_VSTATE_CC2_Msk) >> UCPD_SR_TYPEC_VSTATE_CC2_Pos;
int vstate_max = vstate_cc1 > vstate_cc2 ? vstate_cc1 : vstate_cc2;
switch (vstate_max) {
case 0:
case 1:
return USBPD_500MA; // Note that this is 500mA (i.e. max USB 2.0), not 900mA, as we're not using USB 3.1 as a sink device.
case 2:
return USBPD_1500MA;
case 3:
return USBPD_3000MA;
}
}
return USBPD_500MA;
}

29
drivers/usbpd.h Normal file
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@ -0,0 +1,29 @@
/* Copyright 2021 Nick Brassel (@tzarc)
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
typedef enum {
USBPD_500MA,
USBPD_1500MA,
USBPD_3000MA,
} usbpd_allowance_t;
// Initialises the USBPD subsystem
void usbpd_init(void);
// Gets the current state of the USBPD allowance
usbpd_allowance_t usbpd_get_allowance(void);

4
quantum/quantum.h
View file

@ -193,6 +193,10 @@ extern layer_state_t layer_state;
# include "wpm.h"
#endif
#ifdef USBPD_ENABLE
# include "usbpd.h"
#endif
// Function substitutions to ease GPIO manipulation
#if defined(__AVR__)
typedef uint8_t pin_t;