#include "command.h"
#include "log.h"
#include "interpreter.h"
+#include "target.h"
#include "stdlib.h"
#include "string.h"
#include <unistd.h>
-#ifndef MINIDRIVER
-/* this allows JTAG devices to implement the entire jtag_xxx() layer in hw/sw */
-#define MINIDRIVER(a) a
-#endif
/* note that this is not marked as static as it must be available from outside jtag.c for those
cmd_queue_cur_state = cmd_queue_end_state;
- int retval=interface_jtag_add_ir_scan(num_fields, fields, state);
+ int retval=interface_jtag_add_ir_scan(num_fields, fields, cmd_queue_end_state);
if (retval!=ERROR_OK)
jtag_error=retval;
return retval;
cmd_queue_cur_state = cmd_queue_end_state;
- return interface_jtag_add_plain_ir_scan(num_fields, fields, state);
+ return interface_jtag_add_plain_ir_scan(num_fields, fields, cmd_queue_end_state);
}
int MINIDRIVER(interface_jtag_add_plain_ir_scan)(int num_fields, scan_field_t *fields, enum tap_state state)
cmd_queue_cur_state = cmd_queue_end_state;
- return interface_jtag_add_dr_scan(num_fields, fields, state);
+ return interface_jtag_add_dr_scan(num_fields, fields, cmd_queue_end_state);
}
int MINIDRIVER(interface_jtag_add_dr_scan)(int num_fields, scan_field_t *fields, enum tap_state state)
}
if (!found)
{
+#ifdef _DEBUG_JTAG_IO_
/* if a device isn't listed, the BYPASS register should be selected */
if (!jtag_get_device(i)->bypass)
{
ERROR("BUG: no scan data for a device not in BYPASS");
exit(-1);
}
-
+#endif
/* program the scan field to 1 bit length, and ignore it's value */
(*last_cmd)->cmd.scan->fields[field_count].num_bits = 1;
(*last_cmd)->cmd.scan->fields[field_count].out_value = NULL;
}
else
{
+#ifdef _DEBUG_JTAG_IO_
/* if a device is listed, the BYPASS register must not be selected */
if (jtag_get_device(i)->bypass)
{
- WARNING("scan data for a device in BYPASS");
+ ERROR("BUG: scan data for a device in BYPASS");
+ exit(-1);
}
+#endif
}
}
return ERROR_OK;
}
+void MINIDRIVER(interface_jtag_add_dr_out)(int device_num,
+ int num_fields,
+ int *num_bits,
+ u32 *value,
+ enum tap_state end_state)
+{
+ int i;
+ int field_count = 0;
+ int scan_size;
+ int bypass_devices = 0;
+
+ jtag_command_t **last_cmd = jtag_get_last_command_p();
+ jtag_device_t *device = jtag_devices;
+ /* count devices in bypass */
+ while (device)
+ {
+ if (device->bypass)
+ bypass_devices++;
+ device = device->next;
+ }
+
+ /* allocate memory for a new list member */
+ *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
+ last_comand_pointer = &((*last_cmd)->next);
+ (*last_cmd)->next = NULL;
+ (*last_cmd)->type = JTAG_SCAN;
+
+ /* allocate memory for dr scan command */
+ (*last_cmd)->cmd.scan = cmd_queue_alloc(sizeof(scan_command_t));
+ (*last_cmd)->cmd.scan->ir_scan = 0;
+ (*last_cmd)->cmd.scan->num_fields = num_fields + bypass_devices;
+ (*last_cmd)->cmd.scan->fields = cmd_queue_alloc((num_fields + bypass_devices) * sizeof(scan_field_t));
+ (*last_cmd)->cmd.scan->end_state = end_state;
+
+ for (i = 0; i < jtag_num_devices; i++)
+ {
+ (*last_cmd)->cmd.scan->fields[field_count].device = i;
+
+ if (i == device_num)
+ {
+ int j;
+#ifdef _DEBUG_JTAG_IO_
+ /* if a device is listed, the BYPASS register must not be selected */
+ if (jtag_get_device(i)->bypass)
+ {
+ ERROR("BUG: scan data for a device in BYPASS");
+ exit(-1);
+ }
+#endif
+ for (j = 0; j < num_fields; j++)
+ {
+ u8 out_value[4];
+ scan_size = num_bits[j];
+ buf_set_u32(out_value, 0, scan_size, value[j]);
+ (*last_cmd)->cmd.scan->fields[field_count].num_bits = scan_size;
+ (*last_cmd)->cmd.scan->fields[field_count].out_value = buf_cpy(out_value, cmd_queue_alloc(CEIL(scan_size, 8)), scan_size);
+ (*last_cmd)->cmd.scan->fields[field_count].out_mask = NULL;
+ (*last_cmd)->cmd.scan->fields[field_count].in_value = NULL;
+ (*last_cmd)->cmd.scan->fields[field_count].in_check_value = NULL;
+ (*last_cmd)->cmd.scan->fields[field_count].in_check_mask = NULL;
+ (*last_cmd)->cmd.scan->fields[field_count].in_handler = NULL;
+ (*last_cmd)->cmd.scan->fields[field_count++].in_handler_priv = NULL;
+ }
+ } else
+ {
+#ifdef _DEBUG_JTAG_IO_
+ /* if a device isn't listed, the BYPASS register should be selected */
+ if (!jtag_get_device(i)->bypass)
+ {
+ ERROR("BUG: no scan data for a device not in BYPASS");
+ exit(-1);
+ }
+#endif
+ /* program the scan field to 1 bit length, and ignore it's value */
+ (*last_cmd)->cmd.scan->fields[field_count].num_bits = 1;
+ (*last_cmd)->cmd.scan->fields[field_count].out_value = NULL;
+ (*last_cmd)->cmd.scan->fields[field_count].out_mask = NULL;
+ (*last_cmd)->cmd.scan->fields[field_count].in_value = NULL;
+ (*last_cmd)->cmd.scan->fields[field_count].in_check_value = NULL;
+ (*last_cmd)->cmd.scan->fields[field_count].in_check_mask = NULL;
+ (*last_cmd)->cmd.scan->fields[field_count].in_handler = NULL;
+ (*last_cmd)->cmd.scan->fields[field_count++].in_handler_priv = NULL;
+ }
+ }
+}
+
+
+
int jtag_add_plain_dr_scan(int num_fields, scan_field_t *fields, enum tap_state state)
{
cmd_queue_cur_state = cmd_queue_end_state;
- return interface_jtag_add_plain_dr_scan(num_fields, fields, state);
+ return interface_jtag_add_plain_dr_scan(num_fields, fields, cmd_queue_end_state);
}
int MINIDRIVER(interface_jtag_add_plain_dr_scan)(int num_fields, scan_field_t *fields, enum tap_state state)
cmd_queue_cur_state = cmd_queue_end_state;
- return interface_jtag_add_statemove(state);
+ return interface_jtag_add_statemove(cmd_queue_end_state);
}
int MINIDRIVER(interface_jtag_add_statemove)(enum tap_state state)
if (cmd_queue_end_state == TAP_TLR)
jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
+
+ enum tap_state cur_state=cmd_queue_cur_state;
+ int i;
+ for (i=0; i<num_states; i++)
+ {
+ if ((tap_transitions[cur_state].low != path[i])&&
+ (tap_transitions[cur_state].high != path[i]))
+ {
+ ERROR("BUG: %s -> %s isn't a valid TAP transition", tap_state_strings[cur_state], tap_state_strings[path[i]]);
+ exit(-1);
+ }
+ cur_state = path[i];
+ }
+
cmd_queue_cur_state = path[num_states - 1];
return interface_jtag_add_pathmove(num_states, path);
cmd_queue_cur_state = cmd_queue_end_state;
/* executed by sw or hw fifo */
- return interface_jtag_add_runtest(num_cycles, state);
+ return interface_jtag_add_runtest(num_cycles, cmd_queue_end_state);
}
int jtag_add_reset(int req_trst, int req_srst)
int jtag_add_end_state(enum tap_state state)
{
- int retval = interface_jtag_add_end_state(state);
if (state != -1)
cmd_queue_end_state = state;
+ int retval = interface_jtag_add_end_state(cmd_queue_end_state);
return retval;
}
jtag_command_queue = NULL;
last_comand_pointer = &jtag_command_queue;
- jtag_error=ERROR_OK;
-
return retval;
}
int jtag_execute_queue(void)
{
int retval=interface_jtag_execute_queue();
- if (retval!=ERROR_OK)
- return retval;
+ if (retval==ERROR_OK)
+ {
retval=jtag_error;
+ }
jtag_error=ERROR_OK;
return retval;
}
/* Try to examine chain layout according to IEEE 1149.1 ยง12
*/
-int jtag_examine_chain()
+int jtag_examine_chain(u8 idcode_buffer[JTAG_MAX_CHAIN_SIZE * 4] )
{
jtag_device_t *device = jtag_devices;
scan_field_t field;
- u8 idcode_buffer[JTAG_MAX_CHAIN_SIZE * 4];
int i;
int bit_count;
int device_count = 0;
return ERROR_OK;
}
+extern int jtag_init_chain(struct command_context_s *cmd_ctx);
+
+static int jtag_sense_handler(void *priv)
+{
+ struct command_context_s *cmd_ctx;
+ cmd_ctx=(struct command_context_s *)priv;
+
+ static int scan_complete = 0;
+ if (!scan_complete)
+ {
+ if (jtag_init_chain(cmd_ctx)==ERROR_OK)
+ {
+ scan_complete = 1;
+ }
+ return ERROR_OK;
+ }
+
+ return ERROR_OK;
+}
+
+/* OpenOCD will start telnet/gdb servers before the JTAG chain has
+ * been enumerated. This is to allow e.g. GDB init script to
+ * run monitor commands to initialize the target so jtag_init_chain()
+ * will succeed.
+ *
+ * A timer callback is added where sensing is retried once every second
+ * until it succeeds.
+ */
int jtag_init(struct command_context_s *cmd_ctx)
{
- int validate_tries = 0;
jtag_device_t *device;
DEBUG("-");
jtag_add_statemove(TAP_TLR);
jtag_execute_queue();
+ target_register_timer_callback(jtag_sense_handler, 1000, 1, cmd_ctx);
+
+ return ERROR_OK;
+ }
+
+static int jtag_test_chain(u8 idcode_buffer[JTAG_MAX_CHAIN_SIZE * 4])
+{
+ jtag_add_statemove(TAP_TLR);
+ jtag_execute_queue();
+
/* examine chain first, as this could discover the real chain layout */
- if (jtag_examine_chain() != ERROR_OK)
+ if (jtag_examine_chain(idcode_buffer)!=ERROR_OK)
{
- ERROR("trying to validate configured JTAG chain anyway...");
+ WARNING("trying to validate configured JTAG chain anyway...");
}
- while (jtag_validate_chain() != ERROR_OK)
- {
- validate_tries++;
- if (validate_tries > 5)
+ return jtag_validate_chain();
+}
+
+/* Unless we can do this successfully 10 times, we're not
+ * satisfied with the quality of the JTAG communication.
+ *
+ * Since we're continously repeating this operation, be a bit
+ * wary of filling the log with megabytes of data.
+ *
+ * Keep increasing the jtag_divisor until we've got a solid
+ * result.
+ */
+int jtag_init_chain(struct command_context_s *cmd_ctx)
+{
+ int i, j;
+ int retval;
+ for (i=jtag_speed; i<64; i++)
{
- ERROR("Could not validate JTAG chain, exit");
- jtag = NULL;
- return ERROR_JTAG_INVALID_INTERFACE;
+ u8 idcode_buffer[JTAG_MAX_CHAIN_SIZE * 4];
+ jtag_speed=i;
+ if ((retval=jtag->speed(jtag_speed))!=ERROR_OK)
+ continue;
+ for (j=0; j<10; j++)
+ {
+ u8 idcode_current[JTAG_MAX_CHAIN_SIZE * 4];
+ enum log_levels save_log_level=debug_level;
+ /* avoid spamming log */
+ debug_level=LOG_SILENT;
+ retval=jtag_test_chain(idcode_current);
+ if (retval==ERROR_OK)
+ {
+ if (j==0)
+ {
+ memcpy(idcode_buffer, idcode_current, sizeof(idcode_buffer));
+ } else
+ {
+ retval=(memcmp(idcode_buffer, idcode_current, sizeof(idcode_buffer))==0)?ERROR_OK:ERROR_JTAG_INIT_FAILED;
+ }
+ }
+ debug_level = save_log_level;
+ if (retval!=ERROR_OK)
+ {
+ break;
+ }
}
- usleep(10000);
+ if (retval==ERROR_OK)
+ {
+ /* Print out result */
+ INFO("Succeeded jtag chain test jtag_speed=%d", jtag_speed);
+ return jtag_test_chain(idcode_buffer);
+ }
+ DEBUG("Failed jtag chain test, dropping clock rate. Trying jtag_speed=%d\n", i+1);
}
-
- return ERROR_OK;
+ return retval;
}
int handle_interface_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
if (argc > 0)
{
+ jtag_speed = strtoul(args[0], NULL, 0);
/* this command can be called during CONFIG,
* in which case jtag isn't initialized */
if (jtag)
- jtag->speed(strtoul(args[0], NULL, 0));
- else
- jtag_speed = strtoul(args[0], NULL, 0);
+ jtag->speed(jtag_speed);
}
return ERROR_OK;
free(fields[i].out_value);
free(fields);
-
- return ERROR_OK;
-}
-
-
-
-int MINIDRIVER(interface_jtag_add_shift)(const enum tap_state shift_state, const enum tap_state end_state, int num_bits, u32 value)
-{
- u8 out_buf[4];
- buf_set_u32(out_buf, 0, 32, flip_u32(value, 32));
-
- /* allocate memory for a new list member */
- jtag_command_t **last_cmd;
- last_cmd = jtag_get_last_command_p();
- *last_cmd = cmd_queue_alloc(sizeof(jtag_command_t));
- last_comand_pointer = &((*last_cmd)->next);
- (*last_cmd)->next = NULL;
- (*last_cmd)->type = JTAG_SCAN;
-
- /* allocate memory for scan command */
- (*last_cmd)->cmd.scan = cmd_queue_alloc(sizeof(scan_command_t));
- (*last_cmd)->cmd.scan->ir_scan = (shift_state==TAP_SI);
- (*last_cmd)->cmd.scan->num_fields = 1;
- (*last_cmd)->cmd.scan->fields = cmd_queue_alloc(1 * sizeof(scan_field_t));
- (*last_cmd)->cmd.scan->end_state = end_state;
-
- int num_bytes = CEIL(num_bits, 8);
- int i=0;
- (*last_cmd)->cmd.scan->fields[i].device = 0; /* not used by any drivers */
- (*last_cmd)->cmd.scan->fields[i].num_bits = num_bits;
- (*last_cmd)->cmd.scan->fields[i].out_value = buf_cpy(out_buf, cmd_queue_alloc(num_bytes), num_bits);
- (*last_cmd)->cmd.scan->fields[i].out_mask = NULL;
- (*last_cmd)->cmd.scan->fields[i].in_value = NULL;
- (*last_cmd)->cmd.scan->fields[i].in_check_value = NULL;
- (*last_cmd)->cmd.scan->fields[i].in_check_mask = NULL;
- (*last_cmd)->cmd.scan->fields[i].in_handler = NULL;
- (*last_cmd)->cmd.scan->fields[i].in_handler_priv = NULL;
return ERROR_OK;
}
projects / fw / openocd / blobdiff