* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
- * along with this program; if not, write to the *
- * Free Software Foundation, Inc., *
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. *
+ * along with this program. If not, see <http://www.gnu.org/licenses/>. *
***************************************************************************/
#ifdef HAVE_CONFIG_H
#include <target/cortex_m.h>
-#define SAMD_NUM_SECTORS 16
+#define SAMD_NUM_PROT_BLOCKS 16
#define SAMD_PAGE_SIZE_MAX 1024
#define SAMD_FLASH ((uint32_t)0x00000000) /* physical Flash memory */
#define SAMD_DSU_STATUSA 1 /* DSU status register */
#define SAMD_DSU_DID 0x18 /* Device ID register */
+#define SAMD_DSU_CTRL_EXT 0x100 /* CTRL register, external access */
#define SAMD_NVMCTRL_CTRLA 0x00 /* NVM control A register */
#define SAMD_NVMCTRL_CTRLB 0x04 /* NVM control B register */
#define SAMD_SERIES_22 0x02
#define SAMD_SERIES_10 0x02
#define SAMD_SERIES_11 0x03
+#define SAMD_SERIES_09 0x04
/* Device ID macros */
#define SAMD_GET_PROCESSOR(id) (id >> 28)
uint32_t ram_kb;
};
+/* Known SAMD09 parts. DID reset values missing in RM, see
+ * https://github.com/avrxml/asf/blob/master/sam0/utils/cmsis/samd09/include/ */
+static const struct samd_part samd09_parts[] = {
+ { 0x0, "SAMD09D14A", 16, 4 },
+ { 0x7, "SAMD09C13A", 8, 4 },
+};
+
/* Known SAMD10 parts */
static const struct samd_part samd10_parts[] = {
{ 0x0, "SAMD10D14AMU", 16, 4 },
{ 0xC, "SAMD21E16A", 64, 8 },
{ 0xD, "SAMD21E15A", 32, 4 },
{ 0xE, "SAMD21E14A", 16, 2 },
+ /* Below are B Variants (Table 3-7 from rev I of datasheet) */
+ { 0x20, "SAMD21J16B", 64, 8 },
+ { 0x21, "SAMD21J15B", 32, 4 },
+ { 0x23, "SAMD21G16B", 64, 8 },
+ { 0x24, "SAMD21G15B", 32, 4 },
{ 0x26, "SAMD21E16B", 64, 8 },
+ { 0x27, "SAMD21E15B", 32, 4 },
};
/* Known SAMR21 parts. */
samd21_parts, ARRAY_SIZE(samd21_parts) },
{ SAMD_PROCESSOR_M0, SAMD_FAMILY_D, SAMD_SERIES_21,
samr21_parts, ARRAY_SIZE(samr21_parts) },
+ { SAMD_PROCESSOR_M0, SAMD_FAMILY_D, SAMD_SERIES_09,
+ samd09_parts, ARRAY_SIZE(samd09_parts) },
{ SAMD_PROCESSOR_M0, SAMD_FAMILY_D, SAMD_SERIES_10,
samd10_parts, ARRAY_SIZE(samd10_parts) },
{ SAMD_PROCESSOR_M0, SAMD_FAMILY_D, SAMD_SERIES_11,
uint32_t page_size;
int num_pages;
int sector_size;
+ int prot_block_size;
bool probed;
struct target *target;
static int samd_protect_check(struct flash_bank *bank)
{
- int res;
+ int res, prot_block;
uint16_t lock;
res = target_read_u16(bank->target,
return res;
/* Lock bits are active-low */
- for (int i = 0; i < bank->num_sectors; i++)
- bank->sectors[i].is_protected = !(lock & (1<<i));
+ for (prot_block = 0; prot_block < bank->num_prot_blocks; prot_block++)
+ bank->prot_blocks[prot_block].is_protected = !(lock & (1u<<prot_block));
return ERROR_OK;
}
bank->size = part->flash_kb * 1024;
- chip->sector_size = bank->size / SAMD_NUM_SECTORS;
-
res = samd_get_flash_page_info(bank->target, &chip->page_size,
&chip->num_pages);
if (res != ERROR_OK) {
part->flash_kb, chip->num_pages, chip->page_size);
}
+ /* Erase granularity = 1 row = 4 pages */
+ chip->sector_size = chip->page_size * 4;
+
/* Allocate the sector table */
- bank->num_sectors = SAMD_NUM_SECTORS;
- bank->sectors = calloc(bank->num_sectors, sizeof((bank->sectors)[0]));
+ bank->num_sectors = chip->num_pages / 4;
+ bank->sectors = alloc_block_array(0, chip->sector_size, bank->num_sectors);
if (!bank->sectors)
return ERROR_FAIL;
- /* Fill out the sector information: all SAMD sectors are the same size and
- * there is always a fixed number of them. */
- for (int i = 0; i < bank->num_sectors; i++) {
- bank->sectors[i].size = chip->sector_size;
- bank->sectors[i].offset = i * chip->sector_size;
- /* mark as unknown */
- bank->sectors[i].is_erased = -1;
- bank->sectors[i].is_protected = -1;
- }
+ /* 16 protection blocks per device */
+ chip->prot_block_size = bank->size / SAMD_NUM_PROT_BLOCKS;
+
+ /* Allocate the table of protection blocks */
+ bank->num_prot_blocks = SAMD_NUM_PROT_BLOCKS;
+ bank->prot_blocks = alloc_block_array(0, chip->prot_block_size, bank->num_prot_blocks);
+ if (!bank->prot_blocks)
+ return ERROR_FAIL;
samd_protect_check(bank);
return ERROR_OK;
}
-static bool samd_check_error(struct target *target)
+static int samd_check_error(struct target *target)
{
- int ret;
- bool error;
+ int ret, ret2;
uint16_t status;
ret = target_read_u16(target,
SAMD_NVMCTRL + SAMD_NVMCTRL_STATUS, &status);
if (ret != ERROR_OK) {
LOG_ERROR("Can't read NVM status");
- return true;
+ return ret;
}
- if (status & 0x001C) {
- if (status & (1 << 4)) /* NVME */
- LOG_ERROR("SAMD: NVM Error");
- if (status & (1 << 3)) /* LOCKE */
- LOG_ERROR("SAMD: NVM lock error");
- if (status & (1 << 2)) /* PROGE */
- LOG_ERROR("SAMD: NVM programming error");
+ if ((status & 0x001C) == 0)
+ return ERROR_OK;
+
+ if (status & (1 << 4)) { /* NVME */
+ LOG_ERROR("SAMD: NVM Error");
+ ret = ERROR_FLASH_OPERATION_FAILED;
+ }
- error = true;
- } else {
- error = false;
+ if (status & (1 << 3)) { /* LOCKE */
+ LOG_ERROR("SAMD: NVM lock error");
+ ret = ERROR_FLASH_PROTECTED;
+ }
+
+ if (status & (1 << 2)) { /* PROGE */
+ LOG_ERROR("SAMD: NVM programming error");
+ ret = ERROR_FLASH_OPER_UNSUPPORTED;
}
/* Clear the error conditions by writing a one to them */
- ret = target_write_u16(target,
+ ret2 = target_write_u16(target,
SAMD_NVMCTRL + SAMD_NVMCTRL_STATUS, status);
- if (ret != ERROR_OK)
+ if (ret2 != ERROR_OK)
LOG_ERROR("Can't clear NVM error conditions");
- return error;
+ return ret;
}
static int samd_issue_nvmctrl_command(struct target *target, uint16_t cmd)
return res;
/* Check to see if the NVM command resulted in an error condition. */
- if (samd_check_error(target))
- return ERROR_FAIL;
-
- return ERROR_OK;
+ return samd_check_error(target);
}
static int samd_erase_row(struct target *target, uint32_t address)
uint8_t startb, uint8_t endb)
{
int res;
+ uint32_t nvm_ctrlb;
+ bool manual_wp = true;
if (is_user_row_reserved_bit(startb) || is_user_row_reserved_bit(endb)) {
LOG_ERROR("Can't modify bits in the requested range");
return ERROR_FAIL;
}
+ /* Check if we need to do manual page write commands */
+ res = target_read_u32(target, SAMD_NVMCTRL + SAMD_NVMCTRL_CTRLB, &nvm_ctrlb);
+ if (res == ERROR_OK)
+ manual_wp = (nvm_ctrlb & SAMD_NVM_CTRLB_MANW) != 0;
+
/* Retrieve the MCU's page size, in bytes. This is also the size of the
* entire User Row. */
uint32_t page_size;
if (!buf)
return ERROR_FAIL;
- /* Read the user row (comprising one page) by half-words. */
- res = target_read_memory(target, SAMD_USER_ROW, 2, page_size / 2, buf);
+ /* Read the user row (comprising one page) by words. */
+ res = target_read_memory(target, SAMD_USER_ROW, 4, page_size / 4, buf);
if (res != ERROR_OK)
goto out_user_row;
/* Modify */
buf_set_u32(buf, startb, endb - startb + 1, value);
- /* Write the page buffer back out to the target. A Flash write will be
- * triggered automatically. */
+ /* Write the page buffer back out to the target. */
res = target_write_memory(target, SAMD_USER_ROW, 4, page_size / 4, buf);
if (res != ERROR_OK)
goto out_user_row;
- if (samd_check_error(target)) {
- res = ERROR_FAIL;
- goto out_user_row;
+ if (manual_wp) {
+ /* Trigger flash write */
+ res = samd_issue_nvmctrl_command(target, SAMD_NVM_CMD_WAP);
+ } else {
+ res = samd_check_error(target);
}
- /* Success */
- res = ERROR_OK;
-
out_user_row:
free(buf);
return res;
}
-static int samd_protect(struct flash_bank *bank, int set, int first, int last)
+static int samd_protect(struct flash_bank *bank, int set, int first_prot_bl, int last_prot_bl)
{
- struct samd_info *chip = (struct samd_info *)bank->driver_priv;
+ int res = ERROR_OK;
+ int prot_block;
/* We can issue lock/unlock region commands with the target running but
* the settings won't persist unless we're able to modify the LOCK regions
return ERROR_TARGET_NOT_HALTED;
}
- int res = ERROR_OK;
-
- for (int s = first; s <= last; s++) {
- if (set != bank->sectors[s].is_protected) {
- /* Load an address that is within this sector (we use offset 0) */
+ for (prot_block = first_prot_bl; prot_block <= last_prot_bl; prot_block++) {
+ if (set != bank->prot_blocks[prot_block].is_protected) {
+ /* Load an address that is within this protection block (we use offset 0) */
res = target_write_u32(bank->target,
SAMD_NVMCTRL + SAMD_NVMCTRL_ADDR,
- ((s * chip->sector_size) >> 1));
+ bank->prot_blocks[prot_block].offset >> 1);
if (res != ERROR_OK)
goto exit;
- /* Tell the controller to lock that sector */
+ /* Tell the controller to lock that block */
res = samd_issue_nvmctrl_command(bank->target,
set ? SAMD_NVM_CMD_LR : SAMD_NVM_CMD_UR);
if (res != ERROR_OK)
* locked. See Table 9-3 in the SAMD20 datasheet for more details. */
res = samd_modify_user_row(bank->target, set ? 0x0000 : 0xFFFF,
- 48 + first, 48 + last);
+ 48 + first_prot_bl, 48 + last_prot_bl);
if (res != ERROR_OK)
LOG_WARNING("SAMD: protect settings were not made persistent!");
return res;
}
-static int samd_erase(struct flash_bank *bank, int first, int last)
+static int samd_erase(struct flash_bank *bank, int first_sect, int last_sect)
{
- int res;
- int rows_in_sector;
+ int res, s;
struct samd_info *chip = (struct samd_info *)bank->driver_priv;
if (bank->target->state != TARGET_HALTED) {
return ERROR_FLASH_BANK_NOT_PROBED;
}
- /* The SAMD NVM has row erase granularity. There are four pages in a row
- * and the number of rows in a sector depends on the sector size, which in
- * turn depends on the Flash capacity as there is a fixed number of
- * sectors. */
- rows_in_sector = chip->sector_size / (chip->page_size * 4);
-
/* For each sector to be erased */
- for (int s = first; s <= last; s++) {
- if (bank->sectors[s].is_protected) {
- LOG_ERROR("SAMD: failed to erase sector %d. That sector is write-protected", s);
- return ERROR_FLASH_OPERATION_FAILED;
- }
-
- /* For each row in that sector */
- for (int r = s * rows_in_sector; r < (s + 1) * rows_in_sector; r++) {
- res = samd_erase_row(bank->target, r * chip->page_size * 4);
- if (res != ERROR_OK) {
- LOG_ERROR("SAMD: failed to erase sector %d", s);
- return res;
- }
+ for (s = first_sect; s <= last_sect; s++) {
+ res = samd_erase_row(bank->target, bank->sectors[s].offset);
+ if (res != ERROR_OK) {
+ LOG_ERROR("SAMD: failed to erase sector %d at 0x%08" PRIx32, s, bank->sectors[s].offset);
+ return res;
}
}
* then issue CMD_WP always */
if (manual_wp || pg_offset + 4 * nw < chip->page_size) {
res = samd_issue_nvmctrl_command(bank->target, SAMD_NVM_CMD_WP);
- if (res != ERROR_OK) {
- LOG_ERROR("%s: %d", __func__, __LINE__);
- goto free_pb;
- }
- }
+ } else {
+ /* Access through AHB is stalled while flash is being programmed */
+ usleep(200);
- /* Access through AHB is stalled while flash is being programmed */
- usleep(200);
+ res = samd_check_error(bank->target);
+ }
- if (samd_check_error(bank->target)) {
+ if (res != ERROR_OK) {
LOG_ERROR("%s: write failed at address 0x%08" PRIx32, __func__, address);
- res = ERROR_FAIL;
goto free_pb;
}
COMMAND_HANDLER(samd_handle_chip_erase_command)
{
struct target *target = get_current_target(CMD_CTX);
+ int res = ERROR_FAIL;
if (target) {
/* Enable access to the DSU by disabling the write protect bit */
target_write_u32(target, SAMD_PAC1, (1<<1));
+ /* intentionally without error checking - not accessible on secured chip */
+
/* Tell the DSU to perform a full chip erase. It takes about 240ms to
* perform the erase. */
- target_write_u8(target, SAMD_DSU, (1<<4));
-
- command_print(CMD_CTX, "chip erased");
+ res = target_write_u8(target, SAMD_DSU + SAMD_DSU_CTRL_EXT, (1<<4));
+ if (res == ERROR_OK)
+ command_print(CMD_CTX, "chip erase started");
+ else
+ command_print(CMD_CTX, "write to DSU CTRL failed");
}
- return ERROR_OK;
+ return res;
}
COMMAND_HANDLER(samd_handle_set_security_command)
COMMAND_HANDLER(samd_handle_reset_deassert)
{
struct target *target = get_current_target(CMD_CTX);
- struct armv7m_common *armv7m = target_to_armv7m(target);
int retval = ERROR_OK;
enum reset_types jtag_reset_config = jtag_get_reset_config();
+ /* If the target has been unresponsive before, try to re-establish
+ * communication now - CPU is held in reset by DSU, DAP is working */
+ if (!target_was_examined(target))
+ target_examine_one(target);
+ target_poll(target);
+
/* In case of sysresetreq, debug retains state set in cortex_m_assert_reset()
* so we just release reset held by DSU
*
* After vectreset DSU release is not needed however makes no harm
*/
if (target->reset_halt && (jtag_reset_config & RESET_HAS_SRST)) {
- retval = mem_ap_write_u32(armv7m->debug_ap, DCB_DHCSR, DBGKEY | C_HALT | C_DEBUGEN);
+ retval = target_write_u32(target, DCB_DHCSR, DBGKEY | C_HALT | C_DEBUGEN);
if (retval == ERROR_OK)
- retval = mem_ap_write_u32(armv7m->debug_ap, DCB_DEMCR,
+ retval = target_write_u32(target, DCB_DEMCR,
TRCENA | VC_HARDERR | VC_BUSERR | VC_CORERESET);
/* do not return on error here, releasing DSU reset is more important */
}
projects / openocd / blobdiff