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target/stm32f1: GD32E230 option write special case handling 

Signed-off-by: Rafael Silva <perigoso@riseup.net>
This commit is contained in:
Rafael Silva 2022-06-27 22:46:59 +01:00 committed by Rachel Mant
parent e7a7d82b33
commit 1a963b81f6
1 changed files with 21 additions and 5 deletions
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26
src/target/stm32f1.c
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@ -444,14 +444,19 @@ static bool stm32f1_option_erase(target *t)
return true;
}
static bool stm32f1_option_write_erased(target *t, uint32_t addr, uint16_t value)
static bool stm32f1_option_write_erased(target *t, uint32_t addr, uint16_t value, bool width_word)
{
if (value == 0xffff)
return true;
/* Erase option bytes instruction */
target_mem_write32(t, FLASH_CR, FLASH_CR_OPTPG | FLASH_CR_OPTWRE);
target_mem_write16(t, addr, value);
if (width_word)
target_mem_write32(t, addr, 0xFFFF0000 | value);
else
target_mem_write16(t, addr, value);
/* Read FLASH_SR to poll for BSY bit */
while (target_mem_read32(t, FLASH_SR) & FLASH_SR_BSY)
if (target_check_error(t))
@ -487,8 +492,14 @@ static bool stm32f1_option_write(target *t, uint32_t addr, uint16_t value)
opt_val[index] = value;
/* Write changed values*/
bool width_word = false;
if (t->idcode == 0x410 && (t->cpuid & CPUID_PARTNO_MASK) == CORTEX_M23) {
/* GD32E230 special case, target_mem_write16 does not work */
width_word = true;
}
for (size_t i = 0; i < 8; i++)
if (!stm32f1_option_write_erased(t, FLASH_OBP_RDP + i * 2, opt_val[i]))
if (!stm32f1_option_write_erased(t, FLASH_OBP_RDP + i * 2, opt_val[i], width_word))
return false;
return true;
@ -523,9 +534,14 @@ static bool stm32f1_cmd_option(target *t, int argc, const char **argv)
target_mem_write32(t, FLASH_OPTKEYR, KEY1);
target_mem_write32(t, FLASH_OPTKEYR, KEY2);
if (argc == 2 && !strcmp(argv[1], "erase")) {
if (argc == 2 && strcmp(argv[1], "erase") == 0) {
stm32f1_option_erase(t);
stm32f1_option_write_erased(t, FLASH_OBP_RDP, flash_obp_rdp_key);
bool width_word = false;
if (t->idcode == 0x410 && (t->cpuid & CPUID_PARTNO_MASK) == CORTEX_M23) {
/* GD32E230 special case, target_mem_write16 does not work */
width_word = true;
}
stm32f1_option_write_erased(t, FLASH_OBP_RDP, flash_obp_rdp_key, width_word);
} else if (rdprt) {
tc_printf(t, "Device is Read Protected\n");
tc_printf(t, "Use \"monitor option erase\" to unprotect, erasing device\n");