ULINK driver: Implement JTAG_STABLECLOCKS command
Signed-off-by: Martin Schmölzer <martin.schmoelzer@student.tuwien.ac.at>
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@ -211,6 +211,7 @@ int ulink_queue_runtest(struct ulink *device, struct jtag_command *cmd);
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int ulink_queue_reset(struct ulink *device, struct jtag_command *cmd);
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int ulink_queue_pathmove(struct ulink *device, struct jtag_command *cmd);
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int ulink_queue_sleep(struct ulink *device, struct jtag_command *cmd);
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int ulink_queue_stableclocks(struct ulink *device, struct jtag_command *cmd);
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int ulink_post_process_scan(ulink_cmd_t *ulink_cmd);
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int ulink_post_process_queue(struct ulink *device);
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@ -1551,6 +1552,55 @@ int ulink_queue_sleep(struct ulink *device, struct jtag_command *cmd)
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return ulink_append_sleep_cmd(device, cmd->cmd.sleep->us);
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}
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/**
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* Generate TCK cycles while remaining in a stable state.
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*
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* @param device pointer to struct ulink identifying ULINK driver instance.
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* @param cmd pointer to the command that shall be executed.
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*/
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int ulink_queue_stableclocks(struct ulink *device, struct jtag_command *cmd)
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{
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int ret;
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unsigned num_cycles;
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if (!tap_is_state_stable(tap_get_state())) {
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LOG_ERROR("JTAG_STABLECLOCKS: state not stable");
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return ERROR_FAIL;
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}
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num_cycles = cmd->cmd.stableclocks->num_cycles;
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/* TMS stays either high (Test Logic Reset state) or low (all other states) */
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if (tap_get_state() == TAP_RESET) {
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ret = ulink_append_set_signals_cmd(device, 0, SIGNAL_TMS);
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}
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else {
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ret = ulink_append_set_signals_cmd(device, SIGNAL_TMS, 0);
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}
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if (ret != ERROR_OK) {
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return ret;
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}
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while (num_cycles > 0) {
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if (num_cycles > 0xFFFF) {
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/* OpenULINK CMD_CLOCK_TCK can generate up to 0xFFFF (uint16_t) cycles */
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ret = ulink_append_clock_tck_cmd(device, 0xFFFF);
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num_cycles -= 0xFFFF;
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}
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else {
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ret = ulink_append_clock_tck_cmd(device, num_cycles);
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num_cycles = 0;
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}
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if (ret != ERROR_OK) {
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return ret;
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}
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}
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return ERROR_OK;
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}
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/**
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* Post-process JTAG_SCAN command
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*
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@ -1612,6 +1662,7 @@ int ulink_post_process_queue(struct ulink *device)
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case JTAG_RESET:
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case JTAG_PATHMOVE:
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case JTAG_SLEEP:
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case JTAG_STABLECLOCKS:
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/* Nothing to do for these commands */
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ret = ERROR_OK;
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break;
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@ -1672,6 +1723,9 @@ static int ulink_execute_queue(void)
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case JTAG_SLEEP:
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ret = ulink_queue_sleep(ulink_handle, cmd);
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break;
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case JTAG_STABLECLOCKS:
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ret = ulink_queue_stableclocks(ulink_handle, cmd);
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break;
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default:
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ret = ERROR_FAIL;
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LOG_ERROR("BUG: encountered unknown JTAG command type");
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