+void mips_ejtag_drscan_32_out(struct mips_ejtag *ejtag_info, uint32_t data)
+{
+ uint8_t t[4];
+ struct jtag_tap *tap;
+ tap = ejtag_info->tap;
+ assert(tap != NULL);
+
+ struct scan_field field;
+
+ field.num_bits = 32;
+ field.out_value = t;
+ buf_set_u32(t, 0, field.num_bits, data);
+
+ field.in_value = NULL;
+
+ jtag_add_dr_scan(tap, 1, &field, TAP_IDLE);
+}
+
+int mips_ejtag_drscan_8(struct mips_ejtag *ejtag_info, uint32_t *data)
+{
+ struct jtag_tap *tap;
+ tap = ejtag_info->tap;
+ assert(tap != NULL);
+
+ struct scan_field field;
+ uint8_t t[4] = {0, 0, 0, 0}, r[4];
+ int retval;
+
+ field.num_bits = 8;
+ field.out_value = t;
+ buf_set_u32(t, 0, field.num_bits, *data);
+ field.in_value = r;
+
+ jtag_add_dr_scan(tap, 1, &field, TAP_IDLE);
+
+ if ((retval = jtag_execute_queue()) != ERROR_OK)
+ {
+ LOG_ERROR("register read failed");
+ return retval;
+ }
+
+ *data = buf_get_u32(field.in_value, 0, 32);
+
+ return ERROR_OK;
+}
+
+void mips_ejtag_drscan_8_out(struct mips_ejtag *ejtag_info, uint8_t data)
+{
+ struct jtag_tap *tap;
+ tap = ejtag_info->tap;
+ assert(tap != NULL);
+
+ struct scan_field field;
+
+ field.num_bits = 8;
+ field.out_value = &data;
+ field.in_value = NULL;
+
+ jtag_add_dr_scan(tap, 1, &field, TAP_IDLE);
+}
+
+static int mips_ejtag_step_enable(struct mips_ejtag *ejtag_info)