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target/efm32: mass erase correctness 

Signed-off-by: Rafael Silva <perigoso@riseup.net>
This commit is contained in:
Rafael Silva 2022-07-12 22:34:19 +01:00 committed by Rachel Mant
parent 00dd7f145f
commit c2589bc39f
1 changed files with 24 additions and 0 deletions
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24
src/target/efm32.c
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@ -87,6 +87,7 @@ const struct command_s efm32_cmd_list[] = {
#define EFM32_MSC_WRITECMD_WRITETRIG (1 << 4)
#define EFM32_MSC_WRITECMD_ERASEABORT (1 << 5)
#define EFM32_MSC_WRITECMD_ERASEMAIN0 (1 << 8)
#define EFM32_MSC_WRITECMD_ERASEMAIN1 (1 << 9)
#define EFM32_MSC_STATUS_BUSY (1 << 0)
#define EFM32_MSC_STATUS_LOCKED (1 << 1)
@ -688,8 +689,18 @@ static bool efm32_mass_erase(target *t)
if (device == NULL) {
return true;
}
if (device->family_id == 71 || device->family_id == 73) {
/* original Gecko and Tiny Gecko families don't support mass erase */
tc_printf(t, "This device does not support mass erase through MSC.\n");
return false;
}
uint32_t msc = device->msc_addr;
uint8_t di_version = t->driver[0] - 48; /* di version hidden in driver str */
uint16_t flash_kib = efm32_read_flash_size(t, di_version);
/* Set WREN bit to enable MSC write and erase functionality */
target_mem_write32(t, EFM32_MSC_WRITECTRL(msc), 1);
@ -708,6 +719,19 @@ static bool efm32_mass_erase(target *t)
target_print_progress(&timeout);
}
/* Parts with >= 512 kiB flash have 2 mass erase regions */
if (flash_kib >= 512) {
/* Erase operation */
target_mem_write32(t, EFM32_MSC_WRITECMD(msc), EFM32_MSC_WRITECMD_ERASEMAIN1);
/* Poll MSC Busy */
while ((target_mem_read32(t, EFM32_MSC_STATUS(msc)) & EFM32_MSC_STATUS_BUSY)) {
if (target_check_error(t))
return false;
target_print_progress(&timeout);
}
}
/* Relock mass erase */
target_mem_write32(t, EFM32_MSC_MASSLOCK(msc), 0);