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CTRL keyboard bootloader_jump support

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Adds support for CTRL keyboards to enter bootloader via bootloader_jump()
This commit is contained in:
patrickmt 2018-09-28 22:34:56 -04:00 committed by Jack Humbert
parent 20a10bd084
commit daf0cc60bf
4 changed files with 38 additions and 15 deletions
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3
lib/arm_atsam/packs/atmel/SAMD51_DFP/1.0.70/gcc/gcc/samd51j18a_flash.ld
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@ -51,6 +51,9 @@ HEAP_SIZE = DEFINED(HEAP_SIZE) ? HEAP_SIZE : DEFINED(__heap_size__) ? __heap_siz
_srom = ORIGIN(rom); _srom = ORIGIN(rom);
_lrom = LENGTH(rom); _lrom = LENGTH(rom);
_erom = ORIGIN(rom) + LENGTH(rom); _erom = ORIGIN(rom) + LENGTH(rom);
_sram = ORIGIN(ram);
_lram = LENGTH(ram);
_eram = ORIGIN(ram) + LENGTH(ram);
/* Section Definitions */ /* Section Definitions */
SECTIONS SECTIONS

32
tmk_core/common/arm_atsam/bootloader.c
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@ -16,25 +16,27 @@
#include "bootloader.h" #include "bootloader.h"
#include "samd51j18a.h" #include "samd51j18a.h"
#include "md_bootloader.h"
//Set watchdog timer to reset. Directs the bootloader to stay in programming mode. //Set watchdog timer to reset. Directs the bootloader to stay in programming mode.
void bootloader_jump(void) void bootloader_jump(void) {
{ #ifdef KEYBOARD_massdrop_ctrl
//Keyboards released with certain bootloader can not enter bootloader from app until workaround is created //CTRL keyboards released with bootloader version below must use RAM method. Otherwise use WDT method.
uint8_t ver_no_jump[] = "v2.18Jun 22 2018 17:28:08"; uint8_t ver_ram_method[] = "v2.18Jun 22 2018 17:28:08"; //The version to match (NULL terminated by compiler)
uint8_t *ver_check = ver_no_jump; uint8_t *ver_check = ver_ram_method; //Pointer to version match string for traversal
uint8_t *boot_check = (uint8_t *)0x21A0; uint8_t *ver_rom = (uint8_t *)0x21A0; //Pointer to address in ROM where this specific bootloader version would exist
while (*ver_check && *boot_check == *ver_check)
{ while (*ver_check && *ver_rom == *ver_check) { //While there are check version characters to match and bootloader's version matches check's version
ver_check++; ver_check++; //Move check version pointer to next character
boot_check++; ver_rom++; //Move ROM version pointer to next character
} }
if (!*ver_check)
{ if (!*ver_check) { //If check version pointer is NULL, all characters have matched
//Version match *MAGIC_ADDR = BOOTLOADER_MAGIC; //Set magic number into RAM
//Software workaround would go here NVIC_SystemReset(); //Perform system reset
return; //No software restart method implemented... must use hardware reset button while (1) {} //Won't get here
} }
#endif
WDT->CTRLA.bit.ENABLE = 0; WDT->CTRLA.bit.ENABLE = 0;
while (WDT->SYNCBUSY.bit.ENABLE) {} while (WDT->SYNCBUSY.bit.ENABLE) {}

7
tmk_core/protocol/arm_atsam/md_bootloader.h
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@ -7,6 +7,13 @@ extern uint32_t _erom;
#define BOOTLOADER_SERIAL_MAX_SIZE 20 //DO NOT MODIFY! #define BOOTLOADER_SERIAL_MAX_SIZE 20 //DO NOT MODIFY!
#ifdef KEYBOARD_massdrop_ctrl
//WARNING: These are only for CTRL bootloader release "v2.18Jun 22 2018 17:28:08" for bootloader_jump support
extern uint32_t _eram;
#define BOOTLOADER_MAGIC 0x3B9ACA00
#define MAGIC_ADDR (uint32_t *)(&_eram - 4)
#endif
#ifdef MD_BOOTLOADER #ifdef MD_BOOTLOADER
#define MCU_HZ 48000000 #define MCU_HZ 48000000

11
tmk_core/protocol/arm_atsam/startup.c
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@ -28,6 +28,7 @@
*/ */
#include "samd51.h" #include "samd51.h"
#include "md_bootloader.h"
/* Initialize segments */ /* Initialize segments */
extern uint32_t _sfixed; extern uint32_t _sfixed;
@ -500,6 +501,16 @@ const DeviceVectors exception_table = {
*/ */
void Reset_Handler(void) void Reset_Handler(void)
{ {
#ifdef KEYBOARD_massdrop_ctrl
/* WARNING: This is only for CTRL bootloader release "v2.18Jun 22 2018 17:28:08" for bootloader_jump support */
if (*MAGIC_ADDR == BOOTLOADER_MAGIC) {
/* At this point, the bootloader's memory is initialized properly, so undo the jump to here, then jump back */
*MAGIC_ADDR = 0x00000000; /* Change value to prevent potential bootloader entrance loop */
__set_MSP(0x20008818); /* MSP according to bootloader */
SCB->VTOR = 0x00000000; /* Vector table back to bootloader's */
asm("bx %0"::"r"(0x00001267)); /* Jump past bootloader RCAUSE check using THUMB */
}
#endif
uint32_t *pSrc, *pDest; uint32_t *pSrc, *pDest;
/* Initialize the relocate segment */ /* Initialize the relocate segment */