mirror of
https://github.com/qmk/qmk_firmware.git
synced 2024-11-25 04:43:02 +00:00
58 lines
2.0 KiB
C
58 lines
2.0 KiB
C
|
// Copyright 2022 Stefan Kerkmann
|
||
|
|
// SPDX-License-Identifier: GPL-2.0-or-later
|
||
|
|
|
||
|
|
#include "quantum.h"
|
||
|
|
#include "hal.h"
|
||
|
|
#include "bootloader.h"
|
||
|
|
#include "pico/bootrom.h"
|
||
|
|
|
||
|
|
#if !defined(RP2040_BOOTLOADER_DOUBLE_TAP_RESET_LED)
|
||
|
|
# define RP2040_BOOTLOADER_DOUBLE_TAP_RESET_LED_MASK 0U
|
||
|
|
#else
|
||
|
|
# define RP2040_BOOTLOADER_DOUBLE_TAP_RESET_LED_MASK (1U << RP2040_BOOTLOADER_DOUBLE_TAP_RESET_LED)
|
||
|
|
#endif
|
||
|
|
|
||
|
|
__attribute__((weak)) void mcu_reset(void) {
|
||
|
|
NVIC_SystemReset();
|
||
|
|
}
|
||
|
|
void bootloader_jump(void) {
|
||
|
|
reset_usb_boot(RP2040_BOOTLOADER_DOUBLE_TAP_RESET_LED_MASK, 0U);
|
||
|
|
}
|
||
|
|
|
||
|
|
void enter_bootloader_mode_if_requested(void) {}
|
||
|
|
|
||
|
|
#if defined(RP2040_BOOTLOADER_DOUBLE_TAP_RESET)
|
||
|
|
# if !defined(RP2040_BOOTLOADER_DOUBLE_TAP_RESET_TIMEOUT)
|
||
|
|
# define RP2040_BOOTLOADER_DOUBLE_TAP_RESET_TIMEOUT 200U
|
||
|
|
# endif
|
||
|
|
|
||
|
|
// Needs to be located in a RAM section that is never initialized on boot to
|
||
|
|
// preserve its value on reset
|
||
|
|
static volatile uint32_t __attribute__((section(".ram0.bootloader_magic"))) magic_location;
|
||
|
|
const uint32_t magic_token = 0xCAFEB0BA;
|
||
|
|
|
||
|
|
// We can not use the __early_init / enter_bootloader_mode_if_requested hook as
|
||
|
|
// we depend on an already initialized system with usable memory regions and
|
||
|
|
// populated function pointer tables to the optimized math functions in the
|
||
|
|
// bootrom. This function is called just prior to main.
|
||
|
|
void __late_init(void) {
|
||
|
|
// All clocks have to be enabled before jumping to the bootloader function,
|
||
|
|
// otherwise the bootrom will be stuck infinitely.
|
||
|
|
clocks_init();
|
||
|
|
|
||
|
|
if (magic_location != magic_token) {
|
||
|
|
magic_location = magic_token;
|
||
|
|
// ChibiOS is not initialized at this point, so sleeping is only
|
||
|
|
// possible via busy waiting. The internal timer peripheral is running
|
||
|
|
// at this point with a precision of 1us.
|
||
|
|
chSysPolledDelayX(MS2RTC(1 * MHZ, RP2040_BOOTLOADER_DOUBLE_TAP_RESET_TIMEOUT));
|
||
|
|
magic_location = 0;
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
magic_location = 0;
|
||
|
|
reset_usb_boot(RP2040_BOOTLOADER_DOUBLE_TAP_RESET_LED_MASK, 0U);
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif
|