+static int psoc5lp_spc_read_volatile_byte(struct target *target,
+ uint8_t array_id, uint8_t offset, uint8_t *data)
+{
+ int retval;
+
+ retval = psoc5lp_spc_write_opcode(target, SPC_READ_VOLATILE_BYTE);
+ if (retval != ERROR_OK)
+ return retval;
+ retval = target_write_u8(target, SPC_CPU_DATA, array_id);
+ if (retval != ERROR_OK)
+ return retval;
+ retval = target_write_u8(target, SPC_CPU_DATA, offset);
+ if (retval != ERROR_OK)
+ return retval;
+
+ retval = psoc5lp_spc_busy_wait_data(target);
+ if (retval != ERROR_OK)
+ return retval;
+
+ retval = target_read_u8(target, SPC_CPU_DATA, data);
+ if (retval != ERROR_OK)
+ return retval;
+
+ retval = psoc5lp_spc_busy_wait_idle(target);
+ if (retval != ERROR_OK)
+ return retval;
+
+ return ERROR_OK;
+}
+
+/*
+ * NV Latch
+ */
+
+struct psoc5lp_nvl_flash_bank {
+ bool probed;
+ const struct psoc5lp_device *device;
+};
+
+static int psoc5lp_nvl_read(struct flash_bank *bank,
+ uint8_t *buffer, uint32_t offset, uint32_t count)
+{
+ int retval;
+
+ retval = psoc5lp_spc_enable_clock(bank->target);
+ if (retval != ERROR_OK)
+ return retval;
+
+ while (count > 0) {
+ retval = psoc5lp_spc_read_byte(bank->target,
+ SPC_ARRAY_NVL_USER, offset, buffer);
+ if (retval != ERROR_OK)
+ return retval;
+ buffer++;
+ offset++;
+ count--;
+ }
+
+ return ERROR_OK;
+}
+
+static int psoc5lp_nvl_erase(struct flash_bank *bank, int first, int last)
+{
+ LOG_WARNING("There is no erase operation for NV Latches");
+ return ERROR_FLASH_OPER_UNSUPPORTED;
+}
+
+static int psoc5lp_nvl_erase_check(struct flash_bank *bank)
+{
+ int i;
+
+ for (i = 0; i < bank->num_sectors; i++)
+ bank->sectors[i].is_erased = 0;
+
+ return ERROR_OK;
+}
+
+static int psoc5lp_nvl_write(struct flash_bank *bank,
+ const uint8_t *buffer, uint32_t offset, uint32_t byte_count)
+{
+ struct target *target = bank->target;
+ uint8_t *current_data, val;
+ bool write_required = false, pullup_needed = false, ecc_changed = false;
+ uint32_t i;
+ int retval;
+
+ if (offset != 0 || byte_count != bank->size) {
+ LOG_ERROR("NVL can only be written in whole");
+ return ERROR_FLASH_OPER_UNSUPPORTED;
+ }
+
+ current_data = calloc(1, bank->size);
+ if (!current_data)
+ return ERROR_FAIL;
+ retval = psoc5lp_nvl_read(bank, current_data, offset, byte_count);
+ if (retval != ERROR_OK) {
+ free(current_data);
+ return retval;
+ }
+ for (i = offset; i < byte_count; i++) {
+ if (current_data[i] != buffer[i]) {
+ write_required = true;
+ break;
+ }
+ }
+ if (((buffer[2] & 0x80) == 0x80) && ((current_data[0] & 0x0C) != 0x08))
+ pullup_needed = true;
+ if (((buffer[3] ^ current_data[3]) & 0x08) == 0x08)
+ ecc_changed = true;
+ free(current_data);
+
+ if (!write_required) {
+ LOG_INFO("Unchanged, skipping NVL write");
+ return ERROR_OK;
+ }
+ if (pullup_needed) {
+ retval = target_read_u8(target, PRT1_PC2, &val);
+ if (retval != ERROR_OK)
+ return retval;
+ val &= 0xF0;
+ val |= 0x05;
+ retval = target_write_u8(target, PRT1_PC2, val);
+ if (retval != ERROR_OK)
+ return retval;
+ }
+
+ for (i = offset; i < byte_count; i++) {
+ retval = psoc5lp_spc_load_byte(target,
+ SPC_ARRAY_NVL_USER, i, buffer[i]);
+ if (retval != ERROR_OK)
+ return retval;
+
+ retval = psoc5lp_spc_read_volatile_byte(target,
+ SPC_ARRAY_NVL_USER, i, &val);
+ if (retval != ERROR_OK)
+ return retval;
+ if (val != buffer[i]) {
+ LOG_ERROR("Failed to load NVL byte %" PRIu32 ": "
+ "expected 0x%02" PRIx8 ", read 0x%02" PRIx8,
+ i, buffer[i], val);
+ return ERROR_FLASH_OPERATION_FAILED;
+ }
+ }
+
+ retval = psoc5lp_spc_write_user_nvl(target, SPC_ARRAY_NVL_USER);
+ if (retval != ERROR_OK)
+ return retval;
+
+ if (ecc_changed) {
+ retval = target_call_reset_callbacks(target, RESET_INIT);
+ if (retval != ERROR_OK)
+ LOG_WARNING("Reset failed after enabling or disabling ECC");
+ }
+
+ return ERROR_OK;
+}
+
+static int psoc5lp_nvl_protect_check(struct flash_bank *bank)
+{
+ int i;
+
+ for (i = 0; i < bank->num_sectors; i++)
+ bank->sectors[i].is_protected = -1;
+
+ return ERROR_OK;
+}
+
+static int psoc5lp_nvl_get_info_command(struct flash_bank *bank,
+ char *buf, int buf_size)
+{
+ struct psoc5lp_nvl_flash_bank *psoc_nvl_bank = bank->driver_priv;
+ char part_number[PART_NUMBER_LEN];
+
+ psoc5lp_get_part_number(psoc_nvl_bank->device, part_number);
+
+ snprintf(buf, buf_size, "%s", part_number);
+
+ return ERROR_OK;
+}
+
+static int psoc5lp_nvl_probe(struct flash_bank *bank)
+{
+ struct psoc5lp_nvl_flash_bank *psoc_nvl_bank = bank->driver_priv;
+ int retval;
+
+ if (psoc_nvl_bank->probed)
+ return ERROR_OK;
+
+ if (bank->target->state != TARGET_HALTED) {
+ LOG_ERROR("Target not halted");
+ return ERROR_TARGET_NOT_HALTED;
+ }
+
+ retval = psoc5lp_find_device(bank->target, &psoc_nvl_bank->device);
+ if (retval != ERROR_OK)
+ return retval;
+
+ bank->base = NVL_META_BASE;
+ bank->size = 4;
+ bank->num_sectors = 1;
+ bank->sectors = calloc(bank->num_sectors,
+ sizeof(struct flash_sector));
+ bank->sectors[0].offset = 0;
+ bank->sectors[0].size = 4;
+ bank->sectors[0].is_erased = -1;
+ bank->sectors[0].is_protected = -1;
+
+ psoc_nvl_bank->probed = true;
+
+ return ERROR_OK;
+}
+
+static int psoc5lp_nvl_auto_probe(struct flash_bank *bank)
+{
+ struct psoc5lp_nvl_flash_bank *psoc_nvl_bank = bank->driver_priv;
+
+ if (psoc_nvl_bank->probed)
+ return ERROR_OK;
+
+ return psoc5lp_nvl_probe(bank);
+}
+
+FLASH_BANK_COMMAND_HANDLER(psoc5lp_nvl_flash_bank_command)
+{
+ struct psoc5lp_nvl_flash_bank *psoc_nvl_bank;
+
+ psoc_nvl_bank = malloc(sizeof(struct psoc5lp_nvl_flash_bank));
+ if (!psoc_nvl_bank)
+ return ERROR_FLASH_OPERATION_FAILED;
+
+ psoc_nvl_bank->probed = false;
+
+ bank->driver_priv = psoc_nvl_bank;
+
+ return ERROR_OK;
+}
+
+static const struct command_registration psoc5lp_nvl_exec_command_handlers[] = {
+ COMMAND_REGISTRATION_DONE
+};
+
+static const struct command_registration psoc5lp_nvl_command_handlers[] = {
+ {
+ .name = "psoc5lp_nvl",
+ .mode = COMMAND_ANY,
+ .help = "PSoC 5LP NV Latch command group",
+ .usage = "",
+ .chain = psoc5lp_nvl_exec_command_handlers,
+ },
+ COMMAND_REGISTRATION_DONE
+};
+
+struct flash_driver psoc5lp_nvl_flash = {
+ .name = "psoc5lp_nvl",
+ .commands = psoc5lp_nvl_command_handlers,
+ .flash_bank_command = psoc5lp_nvl_flash_bank_command,
+ .info = psoc5lp_nvl_get_info_command,
+ .probe = psoc5lp_nvl_probe,
+ .auto_probe = psoc5lp_nvl_auto_probe,
+ .protect_check = psoc5lp_nvl_protect_check,
+ .read = psoc5lp_nvl_read,
+ .erase = psoc5lp_nvl_erase,
+ .erase_check = psoc5lp_nvl_erase_check,
+ .write = psoc5lp_nvl_write,
+};
+
Code Review / openocd.git / commitdiff