- #include "bootloader.h"
-
- #include <ch.h>
- #include <hal.h>
- #include "wait.h"
-
- /* This code should be checked whether it runs correctly on platforms */
- #define SYMVAL(sym) (uint32_t)(((uint8_t *)&(sym)) - ((uint8_t *)0))
- #define BOOTLOADER_MAGIC 0xDEADBEEF
- #define MAGIC_ADDR (unsigned long *)(SYMVAL(__ram0_end__) - 4)
-
- #ifndef STM32_BOOTLOADER_DUAL_BANK
- # define STM32_BOOTLOADER_DUAL_BANK FALSE
- #endif
-
- #ifdef BOOTLOADER_TINYUF2
-
- # define DBL_TAP_MAGIC 0xf01669ef // From tinyuf2's board_api.h
-
- // defined by linker script
- extern uint32_t _board_dfu_dbl_tap[];
- # define DBL_TAP_REG _board_dfu_dbl_tap[0]
-
- void bootloader_jump(void) {
- DBL_TAP_REG = DBL_TAP_MAGIC;
- NVIC_SystemReset();
- }
-
- void enter_bootloader_mode_if_requested(void) { /* not needed, no two-stage reset */
- }
-
- #elif STM32_BOOTLOADER_DUAL_BANK
-
- // Need pin definitions
- # include "config_common.h"
-
- # ifndef STM32_BOOTLOADER_DUAL_BANK_GPIO
- # error "No STM32_BOOTLOADER_DUAL_BANK_GPIO defined, don't know which pin to toggle"
- # endif
-
- # ifndef STM32_BOOTLOADER_DUAL_BANK_POLARITY
- # define STM32_BOOTLOADER_DUAL_BANK_POLARITY 0
- # endif
-
- # ifndef STM32_BOOTLOADER_DUAL_BANK_DELAY
- # define STM32_BOOTLOADER_DUAL_BANK_DELAY 100000
- # endif
-
- extern uint32_t __ram0_end__;
-
- __attribute__((weak)) void bootloader_jump(void) {
- // For STM32 MCUs with dual-bank flash, and we're incapable of jumping to the bootloader. The first valid flash
- // bank is executed unconditionally after a reset, so it doesn't enter DFU unless BOOT0 is high. Instead, we do
- // it with hardware...in this case, we pull a GPIO high/low depending on the configuration, connects 3.3V to
- // BOOT0's RC charging circuit, lets it charge the capacitor, and issue a system reset. See the QMK discord
- // #hardware channel pins for an example circuit.
- palSetPadMode(PAL_PORT(STM32_BOOTLOADER_DUAL_BANK_GPIO), PAL_PAD(STM32_BOOTLOADER_DUAL_BANK_GPIO), PAL_MODE_OUTPUT_PUSHPULL);
- # if STM32_BOOTLOADER_DUAL_BANK_POLARITY
- palSetPad(PAL_PORT(STM32_BOOTLOADER_DUAL_BANK_GPIO), PAL_PAD(STM32_BOOTLOADER_DUAL_BANK_GPIO));
- # else
- palClearPad(PAL_PORT(STM32_BOOTLOADER_DUAL_BANK_GPIO), PAL_PAD(STM32_BOOTLOADER_DUAL_BANK_GPIO));
- # endif
-
- // Wait for a while for the capacitor to charge
- wait_ms(100);
-
- // Issue a system reset to get the ROM bootloader to execute, with BOOT0 high
- NVIC_SystemReset();
- }
-
- void enter_bootloader_mode_if_requested(void) {} // not needed at all, but if anybody attempts to invoke it....
-
- #elif defined(STM32_BOOTLOADER_ADDRESS) // STM32_BOOTLOADER_DUAL_BANK
-
- extern uint32_t __ram0_end__;
-
- __attribute__((weak)) void bootloader_jump(void) {
- *MAGIC_ADDR = BOOTLOADER_MAGIC; // set magic flag => reset handler will jump into boot loader
- NVIC_SystemReset();
- }
-
- void enter_bootloader_mode_if_requested(void) {
- unsigned long *check = MAGIC_ADDR;
- if (*check == BOOTLOADER_MAGIC) {
- *check = 0;
- __set_CONTROL(0);
- __set_MSP(*(__IO uint32_t *)STM32_BOOTLOADER_ADDRESS);
- __enable_irq();
-
- typedef void (*BootJump_t)(void);
- BootJump_t boot_jump = *(BootJump_t *)(STM32_BOOTLOADER_ADDRESS + 4);
- boot_jump();
- while (1)
- ;
- }
- }
-
- #elif defined(GD32VF103)
-
- # define DBGMCU_KEY_UNLOCK 0x4B5A6978
- # define DBGMCU_CMD_RESET 0x1
-
- __IO uint32_t *DBGMCU_KEY = (uint32_t *)DBGMCU_BASE + 0x0CU;
- __IO uint32_t *DBGMCU_CMD = (uint32_t *)DBGMCU_BASE + 0x08U;
-
- __attribute__((weak)) void bootloader_jump(void) {
- /* The MTIMER unit of the GD32VF103 doesn't have the MSFRST
- * register to generate a software reset request.
- * BUT instead two undocumented registers in the debug peripheral
- * that allow issueing a software reset. WHO would need the MSFRST
- * register anyway? Source:
- * https://github.com/esmil/gd32vf103inator/blob/master/include/gd32vf103/dbg.h */
- *DBGMCU_KEY = DBGMCU_KEY_UNLOCK;
- *DBGMCU_CMD = DBGMCU_CMD_RESET;
- }
-
- void enter_bootloader_mode_if_requested(void) { /* Jumping to bootloader is not possible from user code. */
- }
-
- #elif defined(KL2x) || defined(K20x) || defined(MK66F18) || defined(MIMXRT1062) // STM32_BOOTLOADER_DUAL_BANK // STM32_BOOTLOADER_ADDRESS
- /* Kinetis */
-
- # if defined(BOOTLOADER_KIIBOHD)
- /* Kiibohd Bootloader (MCHCK and Infinity KB) */
- # define SCB_AIRCR_VECTKEY_WRITEMAGIC 0x05FA0000
- const uint8_t sys_reset_to_loader_magic[] = "\xff\x00\x7fRESET TO LOADER\x7f\x00\xff";
- __attribute__((weak)) void bootloader_jump(void) {
- void *volatile vbat = (void *)VBAT;
- __builtin_memcpy(vbat, (const void *)sys_reset_to_loader_magic, sizeof(sys_reset_to_loader_magic));
- // request reset
- SCB->AIRCR = SCB_AIRCR_VECTKEY_WRITEMAGIC | SCB_AIRCR_SYSRESETREQ_Msk;
- }
-
- # else /* defined(BOOTLOADER_KIIBOHD) */
- /* Default for Kinetis - expecting an ARM Teensy */
- # include "wait.h"
- __attribute__((weak)) void bootloader_jump(void) {
- wait_ms(100);
- __BKPT(0);
- }
- # endif /* defined(BOOTLOADER_KIIBOHD) */
-
- #else /* neither STM32 nor KINETIS */
- __attribute__((weak)) void bootloader_jump(void) {}
- #endif
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