diff options
Diffstat (limited to 'platforms/chibios/bootloader.c')
| -rw-r--r-- | platforms/chibios/bootloader.c | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/platforms/chibios/bootloader.c b/platforms/chibios/bootloader.c new file mode 100644 index 0000000000..5cadadeeeb --- /dev/null +++ b/platforms/chibios/bootloader.c @@ -0,0 +1,145 @@ +#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 |