#include <strings.h>
#endif
+/**
+ * @file
+ * Holds support for accessing JTAG-specific mechanisms from TCl scripts.
+ */
+
static const Jim_Nvp nvp_jtag_tap_event[] = {
{ .value = JTAG_TRST_ASSERTED, .name = "post-reset" },
{ .value = JTAG_TAP_EVENT_SETUP, .name = "setup" },
}
}
-static int
-jim_jtag_interface(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
-{
- Jim_GetOptInfo goi;
- Jim_GetOpt_Setup(&goi, interp, argc-1, argv + 1);
-
- /* return the name of the interface */
- /* TCL code might need to know the exact type... */
- /* FUTURE: we allow this as a means to "set" the interface. */
- if (goi.argc != 0) {
- Jim_WrongNumArgs(goi.interp, 1, goi.argv-1, "(no params)");
- return JIM_ERR;
- }
- const char *name = jtag_interface ? jtag_interface->name : NULL;
- Jim_SetResultString(goi.interp, name ? : "undefined", -1);
- return JIM_OK;
-}
-
static int jim_jtag_arp_init(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
{
Jim_GetOptInfo goi;
.handler = handle_jtag_init_command,
.help = "initialize jtag scan chain",
},
- {
- .name = "interface",
- .mode = COMMAND_ANY,
- .jim_handler = jim_jtag_interface,
- .help = "Returns the name of the currently selected interface.",
- },
{
.name = "arp_init",
.mode = COMMAND_ANY,
}
-static int default_khz(int khz, int *jtag_speed)
-{
- LOG_ERROR("Translation from khz to jtag_speed not implemented");
- return ERROR_FAIL;
-}
-
-static int default_speed_div(int speed, int *khz)
-{
- LOG_ERROR("Translation from jtag_speed to khz not implemented");
- return ERROR_FAIL;
-}
-
-static int default_power_dropout(int *dropout)
-{
- *dropout = 0; /* by default we can't detect power dropout */
- return ERROR_OK;
-}
-
-static int default_srst_asserted(int *srst_asserted)
-{
- *srst_asserted = 0; /* by default we can't detect srst asserted */
- return ERROR_OK;
-}
-
-COMMAND_HANDLER(handle_interface_list_command)
-{
- if (strcmp(CMD_NAME, "interface_list") == 0 && CMD_ARGC > 0)
- return ERROR_COMMAND_SYNTAX_ERROR;
-
- command_print(CMD_CTX, "The following debug interfaces are available:");
- for (unsigned i = 0; NULL != jtag_interfaces[i]; i++)
- {
- const char *name = jtag_interfaces[i]->name;
- command_print(CMD_CTX, "%u: %s", i + 1, name);
- }
-
- return ERROR_OK;
-}
-
-COMMAND_HANDLER(handle_interface_command)
-{
- /* check whether the interface is already configured */
- if (jtag_interface)
- {
- LOG_WARNING("Interface already configured, ignoring");
- return ERROR_OK;
- }
-
- /* interface name is a mandatory argument */
- if (CMD_ARGC != 1 || CMD_ARGV[0][0] == '\0')
- return ERROR_COMMAND_SYNTAX_ERROR;
-
- for (unsigned i = 0; NULL != jtag_interfaces[i]; i++)
- {
- if (strcmp(CMD_ARGV[0], jtag_interfaces[i]->name) != 0)
- continue;
-
- if (NULL != jtag_interfaces[i]->commands)
- {
- int retval = register_commands(CMD_CTX, NULL,
- jtag_interfaces[i]->commands);
- if (ERROR_OK != retval)
- return retval;
- }
-
- jtag_interface = jtag_interfaces[i];
-
- if (jtag_interface->khz == NULL)
- jtag_interface->khz = default_khz;
- if (jtag_interface->speed_div == NULL)
- jtag_interface->speed_div = default_speed_div;
- if (jtag_interface->power_dropout == NULL)
- jtag_interface->power_dropout = default_power_dropout;
- if (jtag_interface->srst_asserted == NULL)
- jtag_interface->srst_asserted = default_srst_asserted;
-
- return ERROR_OK;
- }
-
- /* no valid interface was found (i.e. the configuration option,
- * didn't match one of the compiled-in interfaces
- */
- LOG_ERROR("The specified debug interface was not found (%s)", CMD_ARGV[0]);
- CALL_COMMAND_HANDLER(handle_interface_list_command);
- return ERROR_JTAG_INVALID_INTERFACE;
-}
-
COMMAND_HANDLER(handle_scan_chain_command)
{
struct jtag_tap *tap;
return ERROR_OK;
}
-COMMAND_HANDLER(handle_reset_config_command)
-{
- int new_cfg = 0;
- int mask = 0;
-
- /* Original versions cared about the order of these tokens:
- * reset_config signals [combination [trst_type [srst_type]]]
- * They also clobbered the previous configuration even on error.
- *
- * Here we don't care about the order, and only change values
- * which have been explicitly specified.
- */
- for (; CMD_ARGC; CMD_ARGC--, CMD_ARGV++) {
- int tmp = 0;
- int m;
-
- /* gating */
- m = RESET_SRST_NO_GATING;
- if (strcmp(*CMD_ARGV, "srst_gates_jtag") == 0)
- /* default: don't use JTAG while SRST asserted */;
- else if (strcmp(*CMD_ARGV, "srst_nogate") == 0)
- tmp = RESET_SRST_NO_GATING;
- else
- m = 0;
- if (mask & m) {
- LOG_ERROR("extra reset_config %s spec (%s)",
- "gating", *CMD_ARGV);
- return ERROR_INVALID_ARGUMENTS;
- }
- if (m)
- goto next;
-
- /* signals */
- m = RESET_HAS_TRST | RESET_HAS_SRST;
- if (strcmp(*CMD_ARGV, "none") == 0)
- tmp = RESET_NONE;
- else if (strcmp(*CMD_ARGV, "trst_only") == 0)
- tmp = RESET_HAS_TRST;
- else if (strcmp(*CMD_ARGV, "srst_only") == 0)
- tmp = RESET_HAS_SRST;
- else if (strcmp(*CMD_ARGV, "trst_and_srst") == 0)
- tmp = RESET_HAS_TRST | RESET_HAS_SRST;
- else
- m = 0;
- if (mask & m) {
- LOG_ERROR("extra reset_config %s spec (%s)",
- "signal", *CMD_ARGV);
- return ERROR_INVALID_ARGUMENTS;
- }
- if (m)
- goto next;
-
- /* combination (options for broken wiring) */
- m = RESET_SRST_PULLS_TRST | RESET_TRST_PULLS_SRST;
- if (strcmp(*CMD_ARGV, "separate") == 0)
- /* separate reset lines - default */;
- else if (strcmp(*CMD_ARGV, "srst_pulls_trst") == 0)
- tmp |= RESET_SRST_PULLS_TRST;
- else if (strcmp(*CMD_ARGV, "trst_pulls_srst") == 0)
- tmp |= RESET_TRST_PULLS_SRST;
- else if (strcmp(*CMD_ARGV, "combined") == 0)
- tmp |= RESET_SRST_PULLS_TRST | RESET_TRST_PULLS_SRST;
- else
- m = 0;
- if (mask & m) {
- LOG_ERROR("extra reset_config %s spec (%s)",
- "combination", *CMD_ARGV);
- return ERROR_INVALID_ARGUMENTS;
- }
- if (m)
- goto next;
-
- /* trst_type (NOP without HAS_TRST) */
- m = RESET_TRST_OPEN_DRAIN;
- if (strcmp(*CMD_ARGV, "trst_open_drain") == 0)
- tmp |= RESET_TRST_OPEN_DRAIN;
- else if (strcmp(*CMD_ARGV, "trst_push_pull") == 0)
- /* push/pull from adapter - default */;
- else
- m = 0;
- if (mask & m) {
- LOG_ERROR("extra reset_config %s spec (%s)",
- "trst_type", *CMD_ARGV);
- return ERROR_INVALID_ARGUMENTS;
- }
- if (m)
- goto next;
-
- /* srst_type (NOP without HAS_SRST) */
- m |= RESET_SRST_PUSH_PULL;
- if (strcmp(*CMD_ARGV, "srst_push_pull") == 0)
- tmp |= RESET_SRST_PUSH_PULL;
- else if (strcmp(*CMD_ARGV, "srst_open_drain") == 0)
- /* open drain from adapter - default */;
- else
- m = 0;
- if (mask & m) {
- LOG_ERROR("extra reset_config %s spec (%s)",
- "srst_type", *CMD_ARGV);
- return ERROR_INVALID_ARGUMENTS;
- }
- if (m)
- goto next;
-
- /* caller provided nonsense; fail */
- LOG_ERROR("unknown reset_config flag (%s)", *CMD_ARGV);
- return ERROR_INVALID_ARGUMENTS;
-
-next:
- /* Remember the bits which were specified (mask)
- * and their new values (new_cfg).
- */
- mask |= m;
- new_cfg |= tmp;
- }
-
- /* clear previous values of those bits, save new values */
- if (mask) {
- int old_cfg = jtag_get_reset_config();
-
- old_cfg &= ~mask;
- new_cfg |= old_cfg;
- jtag_set_reset_config(new_cfg);
- } else
- new_cfg = jtag_get_reset_config();
-
-
- /*
- * Display the (now-)current reset mode
- */
- char *modes[5];
-
- /* minimal JTAG has neither SRST nor TRST (so that's the default) */
- switch (new_cfg & (RESET_HAS_TRST | RESET_HAS_SRST)) {
- case RESET_HAS_SRST:
- modes[0] = "srst_only";
- break;
- case RESET_HAS_TRST:
- modes[0] = "trst_only";
- break;
- case RESET_TRST_AND_SRST:
- modes[0] = "trst_and_srst";
- break;
- default:
- modes[0] = "none";
- break;
- }
-
- /* normally SRST and TRST are decoupled; but bugs happen ... */
- switch (new_cfg & (RESET_SRST_PULLS_TRST | RESET_TRST_PULLS_SRST)) {
- case RESET_SRST_PULLS_TRST:
- modes[1] = "srst_pulls_trst";
- break;
- case RESET_TRST_PULLS_SRST:
- modes[1] = "trst_pulls_srst";
- break;
- case RESET_SRST_PULLS_TRST | RESET_TRST_PULLS_SRST:
- modes[1] = "combined";
- break;
- default:
- modes[1] = "separate";
- break;
- }
-
- /* TRST-less connectors include Altera, Xilinx, and minimal JTAG */
- if (new_cfg & RESET_HAS_TRST) {
- if (new_cfg & RESET_TRST_OPEN_DRAIN)
- modes[3] = " trst_open_drain";
- else
- modes[3] = " trst_push_pull";
- } else
- modes[3] = "";
-
- /* SRST-less connectors include TI-14, Xilinx, and minimal JTAG */
- if (new_cfg & RESET_HAS_SRST) {
- if (new_cfg & RESET_SRST_NO_GATING)
- modes[2] = " srst_nogate";
- else
- modes[2] = " srst_gates_jtag";
-
- if (new_cfg & RESET_SRST_PUSH_PULL)
- modes[4] = " srst_push_pull";
- else
- modes[4] = " srst_open_drain";
- } else {
- modes[2] = "";
- modes[4] = "";
- }
-
- command_print(CMD_CTX, "%s %s%s%s%s",
- modes[0], modes[1],
- modes[2], modes[3], modes[4]);
-
- return ERROR_OK;
-}
-
-COMMAND_HANDLER(handle_adapter_nsrst_delay_command)
-{
- if (CMD_ARGC > 1)
- return ERROR_COMMAND_SYNTAX_ERROR;
- if (CMD_ARGC == 1)
- {
- unsigned delay;
- COMMAND_PARSE_NUMBER(uint, CMD_ARGV[0], delay);
-
- jtag_set_nsrst_delay(delay);
- }
- command_print(CMD_CTX, "adapter_nsrst_delay: %u", jtag_get_nsrst_delay());
- return ERROR_OK;
-}
-
COMMAND_HANDLER(handle_jtag_ntrst_delay_command)
{
if (CMD_ARGC > 1)
return ERROR_OK;
}
-COMMAND_HANDLER(handle_adapter_nsrst_assert_width_command)
-{
- if (CMD_ARGC > 1)
- return ERROR_COMMAND_SYNTAX_ERROR;
- if (CMD_ARGC == 1)
- {
- unsigned delay;
- COMMAND_PARSE_NUMBER(uint, CMD_ARGV[0], delay);
-
- jtag_set_nsrst_assert_width(delay);
- }
- command_print(CMD_CTX, "adapter_nsrst_assert_width: %u", jtag_get_nsrst_assert_width());
- return ERROR_OK;
-}
-
COMMAND_HANDLER(handle_jtag_ntrst_assert_width_command)
{
if (CMD_ARGC > 1)
return ERROR_OK;
}
-COMMAND_HANDLER(handle_adapter_khz_command)
-{
- if (CMD_ARGC > 1)
- return ERROR_COMMAND_SYNTAX_ERROR;
-
- int retval = ERROR_OK;
- if (CMD_ARGC == 1)
- {
- unsigned khz = 0;
- COMMAND_PARSE_NUMBER(uint, CMD_ARGV[0], khz);
-
- retval = jtag_config_khz(khz);
- if (ERROR_OK != retval)
- return retval;
- }
-
- int cur_speed = jtag_get_speed_khz();
- retval = jtag_get_speed_readable(&cur_speed);
- if (ERROR_OK != retval)
- return retval;
-
- if (cur_speed)
- command_print(CMD_CTX, "%d kHz", cur_speed);
- else
- command_print(CMD_CTX, "RCLK - adaptive");
-
- return retval;
-}
-
COMMAND_HANDLER(handle_jtag_rclk_command)
{
if (CMD_ARGC > 1)
return ERROR_OK;
}
-static const struct command_registration interface_command_handlers[] = {
- {
- .name = "adapter_khz",
- .handler = handle_adapter_khz_command,
- .mode = COMMAND_ANY,
- .help = "With an argument, change to the specified maximum "
- "jtag speed. For JTAG, 0 KHz signifies adaptive "
- " clocking. "
- "With or without argument, display current setting.",
- .usage = "[khz]",
- },
- {
- .name = "adapter_nsrst_assert_width",
- .handler = handle_adapter_nsrst_assert_width_command,
- .mode = COMMAND_ANY,
- .help = "delay after asserting SRST in ms",
- .usage = "[milliseconds]",
- },
- {
- .name = "adapter_nsrst_delay",
- .handler = handle_adapter_nsrst_delay_command,
- .mode = COMMAND_ANY,
- .help = "delay after deasserting SRST in ms",
- .usage = "[milliseconds]",
- },
- {
- .name = "interface",
- .handler = handle_interface_command,
- .mode = COMMAND_CONFIG,
- .help = "Select a debug adapter interface (driver)",
- .usage = "driver_name",
- },
- {
- .name = "interface_list",
- .handler = handle_interface_list_command,
- .mode = COMMAND_ANY,
- .help = "List all built-in debug adapter interfaces (drivers)",
- },
- {
- .name = "reset_config",
- .handler = handle_reset_config_command,
- .mode = COMMAND_ANY,
- .help = "configure adapter reset behavior",
- .usage = "[none|trst_only|srst_only|trst_and_srst] "
- "[srst_pulls_trst|trst_pulls_srst|combined|separate] "
- "[srst_gates_jtag|srst_nogate] "
- "[trst_push_pull|trst_open_drain] "
- "[srst_push_pull|srst_open_drain]",
- },
- COMMAND_REGISTRATION_DONE
-};
-
-/**
- * Register the commands which deal with arbitrary debug adapter drivers.
- *
- * @todo Remove internal assumptions that all debug adapters use JTAG for
- * transport. Various types and data structures are not named generically.
- */
-int interface_register_commands(struct command_context *ctx)
-{
- return register_commands(ctx, NULL, interface_command_handlers);
-}
-
static const struct command_registration jtag_command_handlers[] = {
{
.name = "jtag_rclk",
Code Review / openocd.git / blobdiff