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kinetis: Check/fix security byte on flash done.

This commit is contained in:
Gareth McMullin 2017-04-19 13:55:37 +12:00
parent 06bf37fe20
commit 1140ff957e
1 changed files with 20 additions and 0 deletions
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20
src/target/kinetis.c
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@ -82,6 +82,7 @@ static bool kinetis_cmd_unsafe(target *t, int argc, char *argv[])
static int kl_gen_flash_erase(struct target_flash *f, target_addr addr, size_t len);
static int kl_gen_flash_write(struct target_flash *f,
target_addr dest, const void *src, size_t len);
static int kl_gen_flash_done(struct target_flash *f);
static void kl_gen_add_flash(target *t,
uint32_t addr, size_t length, size_t erasesize)
@ -92,6 +93,7 @@ static void kl_gen_add_flash(target *t,
f->blocksize = erasesize;
f->erase = kl_gen_flash_erase;
f->write = kl_gen_flash_write;
f->done = kl_gen_flash_done;
f->align = 4;
f->erased = 0xff;
target_add_flash(t, f);
@ -233,6 +235,24 @@ static int kl_gen_flash_write(struct target_flash *f,
return 0;
}
static int kl_gen_flash_done(struct target_flash *f)
{
if (unsafe_enabled)
return 0;
if (target_mem_read8(f->t, FLASH_SECURITY_BYTE_ADDRESS) ==
FLASH_SECURITY_BYTE_UNSECURED)
return 0;
uint32_t val = target_mem_read32(f->t, FLASH_SECURITY_BYTE_ADDRESS);
val = (val & 0xffffff00) | FLASH_SECURITY_BYTE_UNSECURED;
kl_gen_command(f->t, FTFA_CMD_PROGRAM_LONGWORD,
FLASH_SECURITY_BYTE_ADDRESS, (uint8_t*)&val);
return 0;
}
/*** Kinetis recovery mode using the MDM-AP ***/
/* Kinetis security bits are stored in regular flash, so it is possible