*
* Copyright (C) 2009-2010 by David Brownell
*
+ * Copyright (C) 2020-2021, Ampere Computing LLC *
+ *
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the
- * Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
***************************************************************************/
/**
#include "arm_adi_v5.h"
#include <helper/time_support.h>
#include <helper/list.h>
+#include <jtag/swd.h>
/*#define DEBUG_WAIT*/
/* JTAG instructions/registers for JTAG-DP and SWJ-DP */
-#define JTAG_DP_ABORT 0x8
-#define JTAG_DP_DPACC 0xA
-#define JTAG_DP_APACC 0xB
-#define JTAG_DP_IDCODE 0xE
+#define JTAG_DP_ABORT 0xF8
+#define JTAG_DP_DPACC 0xFA
+#define JTAG_DP_APACC 0xFB
+#define JTAG_DP_IDCODE 0xFE
/* three-bit ACK values for DPACC and APACC reads */
#define JTAG_ACK_OK_FAULT 0x2
static int jtag_ap_q_abort(struct adiv5_dap *dap, uint8_t *ack);
#ifdef DEBUG_WAIT
-static const char *dap_reg_name(int instr, int reg_addr)
+static const char *dap_reg_name(struct adiv5_dap *dap, uint8_t instr, uint16_t reg_addr)
{
char *reg_name = "UNK";
case DP_RDBUFF:
reg_name = "RDBUFF";
break;
- case DP_WCR:
- reg_name = "WCR";
+ case DP_DLCR:
+ reg_name = "DLCR";
break;
default:
reg_name = "UNK";
}
if (instr == JTAG_DP_APACC) {
- switch (reg_addr) {
- case MEM_AP_REG_CSW:
+ if (reg_addr == MEM_AP_REG_CSW(dap))
reg_name = "CSW";
- break;
- case MEM_AP_REG_TAR:
+ else if (reg_addr == MEM_AP_REG_TAR(dap))
reg_name = "TAR";
- break;
- case MEM_AP_REG_DRW:
+ else if (reg_addr == MEM_AP_REG_TAR64(dap))
+ reg_name = "TAR64";
+ else if (reg_addr == MEM_AP_REG_DRW(dap))
reg_name = "DRW";
- break;
- case MEM_AP_REG_BD0:
+ else if (reg_addr == MEM_AP_REG_BD0(dap))
reg_name = "BD0";
- break;
- case MEM_AP_REG_BD1:
+ else if (reg_addr == MEM_AP_REG_BD1(dap))
reg_name = "BD1";
- break;
- case MEM_AP_REG_BD2:
+ else if (reg_addr == MEM_AP_REG_BD2(dap))
reg_name = "BD2";
- break;
- case MEM_AP_REG_BD3:
+ else if (reg_addr == MEM_AP_REG_BD3(dap))
reg_name = "BD3";
- break;
- case MEM_AP_REG_CFG:
+ else if (reg_addr == MEM_AP_REG_CFG(dap))
reg_name = "CFG";
- break;
- case MEM_AP_REG_BASE:
+ else if (reg_addr == MEM_AP_REG_BASE(dap))
reg_name = "BASE";
- break;
- case AP_REG_IDR:
+ else if (reg_addr == MEM_AP_REG_BASE64(dap))
+ reg_name = "BASE64";
+ else if (reg_addr == AP_REG_IDR(dap))
reg_name = "IDR";
- break;
- default:
+ else
reg_name = "UNK";
- break;
- }
}
return reg_name;
struct dap_cmd {
struct list_head lh;
uint8_t instr;
- uint8_t reg_addr;
- uint8_t RnW;
+ uint16_t reg_addr;
+ uint8_t rnw;
uint8_t *invalue;
uint8_t ack;
uint32_t memaccess_tck;
uint8_t outvalue_buf[4];
};
-static void log_dap_cmd(const char *header, struct dap_cmd *el)
+#define MAX_DAP_COMMAND_NUM 65536
+
+struct dap_cmd_pool {
+ struct list_head lh;
+ struct dap_cmd cmd;
+};
+
+static void log_dap_cmd(struct adiv5_dap *dap, const char *header, struct dap_cmd *el)
{
#ifdef DEBUG_WAIT
LOG_DEBUG("%s: %2s %6s %5s 0x%08x 0x%08x %2s", header,
el->instr == JTAG_DP_APACC ? "AP" : "DP",
- dap_reg_name(el->instr, el->reg_addr),
- el->RnW == DPAP_READ ? "READ" : "WRITE",
+ dap_reg_name(dap, el->instr, el->reg_addr),
+ el->rnw == DPAP_READ ? "READ" : "WRITE",
buf_get_u32(el->outvalue_buf, 0, 32),
buf_get_u32(el->invalue, 0, 32),
el->ack == JTAG_ACK_OK_FAULT ? "OK" :
#endif
}
-static struct dap_cmd *dap_cmd_new(uint8_t instr,
- uint8_t reg_addr, uint8_t RnW,
+static int jtag_limit_queue_size(struct adiv5_dap *dap)
+{
+ if (dap->cmd_pool_size < MAX_DAP_COMMAND_NUM)
+ return ERROR_OK;
+
+ return dap_run(dap);
+}
+
+static struct dap_cmd *dap_cmd_new(struct adiv5_dap *dap, uint8_t instr,
+ uint16_t reg_addr, uint8_t rnw,
uint8_t *outvalue, uint8_t *invalue,
uint32_t memaccess_tck)
{
- struct dap_cmd *cmd;
- cmd = (struct dap_cmd *)calloc(1, sizeof(struct dap_cmd));
- if (cmd != NULL) {
- INIT_LIST_HEAD(&cmd->lh);
- cmd->instr = instr;
- cmd->reg_addr = reg_addr;
- cmd->RnW = RnW;
- if (outvalue != NULL)
- memcpy(cmd->outvalue_buf, outvalue, 4);
- cmd->invalue = (invalue != NULL) ? invalue : cmd->invalue_buf;
- cmd->memaccess_tck = memaccess_tck;
+ struct dap_cmd_pool *pool = NULL;
+
+ if (list_empty(&dap->cmd_pool)) {
+ pool = calloc(1, sizeof(struct dap_cmd_pool));
+ if (!pool)
+ return NULL;
+ } else {
+ pool = list_first_entry(&dap->cmd_pool, struct dap_cmd_pool, lh);
+ list_del(&pool->lh);
}
+ INIT_LIST_HEAD(&pool->lh);
+ dap->cmd_pool_size++;
+
+ struct dap_cmd *cmd = &pool->cmd;
+ INIT_LIST_HEAD(&cmd->lh);
+ cmd->instr = instr;
+ cmd->reg_addr = reg_addr;
+ cmd->rnw = rnw;
+ if (outvalue)
+ memcpy(cmd->outvalue_buf, outvalue, 4);
+ cmd->invalue = (invalue) ? invalue : cmd->invalue_buf;
+ cmd->memaccess_tck = memaccess_tck;
+
return cmd;
}
-static void flush_journal(struct list_head *lh)
+static void dap_cmd_release(struct adiv5_dap *dap, struct dap_cmd *cmd)
+{
+ struct dap_cmd_pool *pool = container_of(cmd, struct dap_cmd_pool, cmd);
+ if (dap->cmd_pool_size > MAX_DAP_COMMAND_NUM)
+ free(pool);
+ else
+ list_add(&pool->lh, &dap->cmd_pool);
+
+ dap->cmd_pool_size--;
+}
+
+static void flush_journal(struct adiv5_dap *dap, struct list_head *lh)
{
struct dap_cmd *el, *tmp;
+ list_for_each_entry_safe(el, tmp, lh, lh) {
+ list_del(&el->lh);
+ dap_cmd_release(dap, el);
+ }
+}
+
+static void jtag_quit(struct adiv5_dap *dap)
+{
+ struct dap_cmd_pool *el, *tmp;
+ struct list_head *lh = &dap->cmd_pool;
+
list_for_each_entry_safe(el, tmp, lh, lh) {
list_del(&el->lh);
free(el);
* For APACC access with any sticky error flag set, this is discarded.
*/
cmd->fields[0].num_bits = 3;
- buf_set_u32(&cmd->out_addr_buf, 0, 3, ((cmd->reg_addr >> 1) & 0x6) | (cmd->RnW & 0x1));
+ buf_set_u32(&cmd->out_addr_buf, 0, 3, ((cmd->reg_addr >> 1) & 0x6) | (cmd->rnw & 0x1));
cmd->fields[0].out_value = &cmd->out_addr_buf;
- cmd->fields[0].in_value = (ack != NULL) ? ack : &cmd->ack;
+ cmd->fields[0].in_value = (ack) ? ack : &cmd->ack;
/* NOTE: if we receive JTAG_ACK_WAIT, the previous operation did not
* complete; data we write is discarded, data we read is unpredictable.
* See "Minimum Response Time" for JTAG-DP, in the ADIv5 spec.
*/
if (cmd->instr == JTAG_DP_APACC) {
- if (((cmd->reg_addr == MEM_AP_REG_DRW)
- || ((cmd->reg_addr & 0xF0) == MEM_AP_REG_BD0))
- && (cmd->memaccess_tck != 0))
+ if ((cmd->reg_addr == MEM_AP_REG_DRW(dap) ||
+ (cmd->reg_addr & 0xFF0) == MEM_AP_REG_BD0(dap)) &&
+ cmd->memaccess_tck != 0)
jtag_add_runtest(cmd->memaccess_tck, TAP_IDLE);
}
* conversions are performed. See section 4.4.3 of the ADIv5 spec, which
* discusses operations which access these registers.
*
- * Note that only one scan is performed. If RnW is set, a separate scan
+ * Note that only one scan is performed. If rnw is set, a separate scan
* will be needed to collect the data which was read; the "invalue" collects
* the posted result of a preceding operation, not the current one.
*
* @param instr JTAG_DP_APACC (AP access) or JTAG_DP_DPACC (DP access)
* @param reg_addr two significant bits; A[3:2]; for APACC access, the
* SELECT register has more addressing bits.
- * @param RnW false iff outvalue will be written to the DP or AP
+ * @param rnw false iff outvalue will be written to the DP or AP
* @param outvalue points to a 32-bit (little-endian) integer
* @param invalue NULL, or points to a 32-bit (little-endian) integer
* @param ack points to where the three bit JTAG_ACK_* code will be stored
*/
static int adi_jtag_dp_scan(struct adiv5_dap *dap,
- uint8_t instr, uint8_t reg_addr, uint8_t RnW,
+ uint8_t instr, uint16_t reg_addr, uint8_t rnw,
uint8_t *outvalue, uint8_t *invalue,
uint32_t memaccess_tck, uint8_t *ack)
{
struct dap_cmd *cmd;
int retval;
- cmd = dap_cmd_new(instr, reg_addr, RnW, outvalue, invalue, memaccess_tck);
- if (cmd != NULL)
+ cmd = dap_cmd_new(dap, instr, reg_addr, rnw, outvalue, invalue, memaccess_tck);
+ if (cmd)
cmd->dp_select = dap->select;
else
return ERROR_JTAG_DEVICE_ERROR;
* must be different).
*/
static int adi_jtag_dp_scan_u32(struct adiv5_dap *dap,
- uint8_t instr, uint8_t reg_addr, uint8_t RnW,
+ uint8_t instr, uint8_t reg_addr, uint8_t rnw,
uint32_t outvalue, uint32_t *invalue,
uint32_t memaccess_tck, uint8_t *ack)
{
buf_set_u32(out_value_buf, 0, 32, outvalue);
- retval = adi_jtag_dp_scan(dap, instr, reg_addr, RnW,
+ retval = adi_jtag_dp_scan(dap, instr, reg_addr, rnw,
out_value_buf, (uint8_t *)invalue, memaccess_tck, ack);
if (retval != ERROR_OK)
return retval;
{
int retval = ERROR_OK;
- if (dap->last_read != NULL) {
+ if (dap->last_read) {
retval = adi_jtag_dp_scan_u32(dap, JTAG_DP_DPACC,
DP_RDBUFF, DPAP_READ, 0, dap->last_read, 0, NULL);
dap->last_read = NULL;
}
static int adi_jtag_scan_inout_check_u32(struct adiv5_dap *dap,
- uint8_t instr, uint8_t reg_addr, uint8_t RnW,
+ uint8_t instr, uint16_t reg_addr, uint8_t rnw,
uint32_t outvalue, uint32_t *invalue, uint32_t memaccess_tck)
{
int retval;
/* Issue the read or write */
retval = adi_jtag_dp_scan_u32(dap, instr, reg_addr,
- RnW, outvalue, NULL, memaccess_tck, NULL);
+ rnw, outvalue, NULL, memaccess_tck, NULL);
if (retval != ERROR_OK)
return retval;
/* For reads, collect posted value; RDBUFF has no other effect.
* Assumes read gets acked with OK/FAULT, and CTRL_STAT says "OK".
*/
- if ((RnW == DPAP_READ) && (invalue != NULL)) {
+ if ((rnw == DPAP_READ) && (invalue)) {
retval = adi_jtag_dp_scan_u32(dap, JTAG_DP_DPACC,
DP_RDBUFF, DPAP_READ, 0, invalue, 0, NULL);
if (retval != ERROR_OK)
int retval;
struct dap_cmd *el, *tmp, *prev = NULL;
int found_wait = 0;
- uint64_t time_now;
+ int64_t time_now;
LIST_HEAD(replay_list);
/* make sure all queued transactions are complete */
/* skip all completed transactions up to the first WAIT */
list_for_each_entry(el, &dap->cmd_journal, lh) {
if (el->ack == JTAG_ACK_OK_FAULT) {
- log_dap_cmd("LOG", el);
+ log_dap_cmd(dap, "LOG", el);
} else if (el->ack == JTAG_ACK_WAIT) {
found_wait = 1;
break;
} else {
LOG_ERROR("Invalid ACK (%1x) in DAP response", el->ack);
- log_dap_cmd("ERR", el);
+ log_dap_cmd(dap, "ERR", el);
retval = ERROR_JTAG_DEVICE_ERROR;
goto done;
}
*/
if (found_wait && el != list_first_entry(&dap->cmd_journal, struct dap_cmd, lh)) {
prev = list_entry(el->lh.prev, struct dap_cmd, lh);
- if (prev->RnW == DPAP_READ) {
- log_dap_cmd("PND", prev);
+ if (prev->rnw == DPAP_READ) {
+ log_dap_cmd(dap, "PND", prev);
/* search for the next OK transaction, it contains
* the result of the previous READ */
tmp = el;
list_for_each_entry_from(tmp, &dap->cmd_journal, lh) {
if (tmp->ack == JTAG_ACK_OK_FAULT) {
/* recover the read value */
- log_dap_cmd("FND", tmp);
+ log_dap_cmd(dap, "FND", tmp);
if (el->invalue != el->invalue_buf) {
uint32_t invalue = le_to_h_u32(tmp->invalue);
memcpy(el->invalue, &invalue, sizeof(uint32_t));
}
}
- if (prev != NULL) {
- log_dap_cmd("LST", el);
+ if (prev) {
+ log_dap_cmd(dap, "LST", el);
/*
* At this point we're sure that no previous
* To complete the READ, we just keep polling RDBUFF
* until the WAIT condition clears
*/
- tmp = dap_cmd_new(JTAG_DP_DPACC,
+ tmp = dap_cmd_new(dap, JTAG_DP_DPACC,
DP_RDBUFF, DPAP_READ, NULL, NULL, 0);
- if (tmp == NULL) {
+ if (!tmp) {
retval = ERROR_JTAG_DEVICE_ERROR;
goto done;
}
if (retval != ERROR_OK)
break;
if (tmp->ack == JTAG_ACK_OK_FAULT) {
- log_dap_cmd("FND", tmp);
+ log_dap_cmd(dap, "FND", tmp);
if (el->invalue != el->invalue_buf) {
uint32_t invalue = le_to_h_u32(tmp->invalue);
memcpy(el->invalue, &invalue, sizeof(uint32_t));
}
if (tmp->ack != JTAG_ACK_WAIT) {
LOG_ERROR("Invalid ACK (%1x) in DAP response", tmp->ack);
- log_dap_cmd("ERR", tmp);
+ log_dap_cmd(dap, "ERR", tmp);
retval = ERROR_JTAG_DEVICE_ERROR;
break;
}
/* timeout happened */
if (tmp->ack != JTAG_ACK_OK_FAULT) {
LOG_ERROR("Timeout during WAIT recovery");
+ dap->select = DP_SELECT_INVALID;
jtag_ap_q_abort(dap, NULL);
+ /* clear the sticky overrun condition */
+ adi_jtag_scan_inout_check_u32(dap, JTAG_DP_DPACC,
+ DP_CTRL_STAT, DPAP_WRITE,
+ dap->dp_ctrl_stat | SSTICKYORUN, NULL, 0);
retval = ERROR_JTAG_DEVICE_ERROR;
}
}
/* we're done with this command, release it */
- free(tmp);
+ dap_cmd_release(dap, tmp);
if (retval != ERROR_OK)
goto done;
/* move all remaining transactions over to the replay list */
list_for_each_entry_safe_from(el, tmp, &dap->cmd_journal, lh) {
- log_dap_cmd("REP", el);
+ log_dap_cmd(dap, "REP", el);
list_move_tail(&el->lh, &replay_list);
}
/* we're done with the journal, flush it */
- flush_journal(&dap->cmd_journal);
+ flush_journal(dap, &dap->cmd_journal);
/* check for overrun condition in the last batch of transactions */
if (found_wait) {
- LOG_INFO("DAP transaction stalled (WAIT) - slowing down");
+ LOG_INFO("DAP transaction stalled (WAIT) - slowing down and resending");
/* clear the sticky overrun condition */
retval = adi_jtag_scan_inout_check_u32(dap, JTAG_DP_DPACC,
DP_CTRL_STAT, DPAP_WRITE,
/* restore SELECT register first */
if (!list_empty(&replay_list)) {
el = list_first_entry(&replay_list, struct dap_cmd, lh);
- tmp = dap_cmd_new(JTAG_DP_DPACC,
+ tmp = dap_cmd_new(dap, JTAG_DP_DPACC,
DP_SELECT, DPAP_WRITE, (uint8_t *)&el->dp_select, NULL, 0);
- if (tmp == NULL) {
+ if (!tmp) {
retval = ERROR_JTAG_DEVICE_ERROR;
goto done;
}
retval = adi_jtag_dp_scan_cmd_sync(dap, el, NULL);
if (retval != ERROR_OK)
break;
- log_dap_cmd("REC", el);
+ log_dap_cmd(dap, "REC", el);
if (el->ack == JTAG_ACK_OK_FAULT) {
if (el->invalue != el->invalue_buf) {
uint32_t invalue = le_to_h_u32(el->invalue);
}
if (el->ack != JTAG_ACK_WAIT) {
LOG_ERROR("Invalid ACK (%1x) in DAP response", el->ack);
- log_dap_cmd("ERR", el);
+ log_dap_cmd(dap, "ERR", el);
retval = ERROR_JTAG_DEVICE_ERROR;
break;
}
+ LOG_DEBUG("DAP transaction stalled during replay (WAIT) - resending");
+ /* clear the sticky overrun condition */
+ retval = adi_jtag_scan_inout_check_u32(dap, JTAG_DP_DPACC,
+ DP_CTRL_STAT, DPAP_WRITE,
+ dap->dp_ctrl_stat | SSTICKYORUN, NULL, 0);
+ if (retval != ERROR_OK)
+ break;
} while (timeval_ms() - time_now < 1000);
if (retval == ERROR_OK) {
if (el->ack != JTAG_ACK_OK_FAULT) {
LOG_ERROR("Timeout during WAIT recovery");
+ dap->select = DP_SELECT_INVALID;
jtag_ap_q_abort(dap, NULL);
+ /* clear the sticky overrun condition */
+ adi_jtag_scan_inout_check_u32(dap, JTAG_DP_DPACC,
+ DP_CTRL_STAT, DPAP_WRITE,
+ dap->dp_ctrl_stat | SSTICKYORUN, NULL, 0);
retval = ERROR_JTAG_DEVICE_ERROR;
+ break;
}
} else
break;
}
done:
- flush_journal(&replay_list);
- flush_journal(&dap->cmd_journal);
+ flush_journal(dap, &replay_list);
+ flush_journal(dap, &dap->cmd_journal);
return retval;
}
static int jtagdp_transaction_endcheck(struct adiv5_dap *dap)
{
int retval;
- uint32_t ctrlstat;
+ uint32_t ctrlstat, pwrmask;
/* too expensive to call keep_alive() here */
if (ctrlstat & SSTICKYERR) {
LOG_DEBUG("jtag-dp: CTRL/STAT 0x%" PRIx32, ctrlstat);
/* Check power to debug regions */
- if ((ctrlstat & (CDBGPWRUPREQ | CDBGPWRUPACK | CSYSPWRUPREQ | CSYSPWRUPACK)) !=
- (CDBGPWRUPREQ | CDBGPWRUPACK | CSYSPWRUPREQ | CSYSPWRUPACK)) {
+ pwrmask = CDBGPWRUPREQ | CDBGPWRUPACK | CSYSPWRUPREQ;
+ if (!dap->ignore_syspwrupack)
+ pwrmask |= CSYSPWRUPACK;
+ if ((ctrlstat & pwrmask) != pwrmask) {
LOG_ERROR("Debug regions are unpowered, an unexpected reset might have happened");
- retval = ERROR_JTAG_DEVICE_ERROR;
- goto done;
+ dap->do_reconnect = true;
}
if (ctrlstat & SSTICKYERR)
if (ctrlstat & SSTICKYORUN)
LOG_DEBUG("JTAG-DP STICKY OVERRUN");
- /* Clear Sticky Error Bits */
+ /* Clear Sticky Error and Sticky Overrun Bits */
retval = adi_jtag_scan_inout_check_u32(dap, JTAG_DP_DPACC,
DP_CTRL_STAT, DPAP_WRITE,
- dap->dp_ctrl_stat | SSTICKYERR, NULL, 0);
+ dap->dp_ctrl_stat | SSTICKYERR | SSTICKYORUN, NULL, 0);
if (retval != ERROR_OK)
goto done;
- if (ctrlstat & SSTICKYERR) {
- retval = ERROR_JTAG_DEVICE_ERROR;
- goto done;
- }
+ retval = ERROR_JTAG_DEVICE_ERROR;
}
done:
- flush_journal(&dap->cmd_journal);
+ flush_journal(dap, &dap->cmd_journal);
return retval;
}
/*--------------------------------------------------------------------------*/
+static int jtag_connect(struct adiv5_dap *dap)
+{
+ dap->do_reconnect = false;
+ return dap_dp_init(dap);
+}
+
+static int jtag_check_reconnect(struct adiv5_dap *dap)
+{
+ if (dap->do_reconnect)
+ return jtag_connect(dap);
+
+ return ERROR_OK;
+}
+
+static int jtag_send_sequence(struct adiv5_dap *dap, enum swd_special_seq seq)
+{
+ int retval;
+
+ switch (seq) {
+ case JTAG_TO_SWD:
+ retval = jtag_add_tms_seq(swd_seq_jtag_to_swd_len,
+ swd_seq_jtag_to_swd, TAP_INVALID);
+ break;
+ case SWD_TO_JTAG:
+ retval = jtag_add_tms_seq(swd_seq_swd_to_jtag_len,
+ swd_seq_swd_to_jtag, TAP_RESET);
+ break;
+ default:
+ LOG_ERROR("Sequence %d not supported", seq);
+ return ERROR_FAIL;
+ }
+ if (retval == ERROR_OK)
+ retval = jtag_execute_queue();
+ return retval;
+}
+
static int jtag_dp_q_read(struct adiv5_dap *dap, unsigned reg,
uint32_t *data)
{
- int retval = adi_jtag_dp_scan_u32(dap, JTAG_DP_DPACC, reg,
+ int retval = jtag_limit_queue_size(dap);
+ if (retval != ERROR_OK)
+ return retval;
+
+ retval = adi_jtag_dp_scan_u32(dap, JTAG_DP_DPACC, reg,
DPAP_READ, 0, dap->last_read, 0, NULL);
dap->last_read = data;
return retval;
static int jtag_dp_q_write(struct adiv5_dap *dap, unsigned reg,
uint32_t data)
{
- int retval = adi_jtag_dp_scan_u32(dap, JTAG_DP_DPACC,
+ int retval = jtag_limit_queue_size(dap);
+ if (retval != ERROR_OK)
+ return retval;
+
+ retval = adi_jtag_dp_scan_u32(dap, JTAG_DP_DPACC,
reg, DPAP_WRITE, data, dap->last_read, 0, NULL);
dap->last_read = NULL;
return retval;
static int jtag_ap_q_read(struct adiv5_ap *ap, unsigned reg,
uint32_t *data)
{
- int retval = jtag_ap_q_bankselect(ap, reg);
+ int retval = jtag_limit_queue_size(ap->dap);
+ if (retval != ERROR_OK)
+ return retval;
+
+ retval = jtag_check_reconnect(ap->dap);
+ if (retval != ERROR_OK)
+ return retval;
+
+ retval = jtag_ap_q_bankselect(ap, reg);
if (retval != ERROR_OK)
return retval;
static int jtag_ap_q_write(struct adiv5_ap *ap, unsigned reg,
uint32_t data)
{
- int retval = jtag_ap_q_bankselect(ap, reg);
+ int retval = jtag_limit_queue_size(ap->dap);
+ if (retval != ERROR_OK)
+ return retval;
+
+ retval = jtag_check_reconnect(ap->dap);
+ if (retval != ERROR_OK)
+ return retval;
+
+ retval = jtag_ap_q_bankselect(ap, reg);
if (retval != ERROR_OK)
return retval;
* part of DAP setup
*/
const struct dap_ops jtag_dp_ops = {
+ .connect = jtag_connect,
+ .send_sequence = jtag_send_sequence,
.queue_dp_read = jtag_dp_q_read,
.queue_dp_write = jtag_dp_q_write,
.queue_ap_read = jtag_ap_q_read,
.queue_ap_abort = jtag_ap_q_abort,
.run = jtag_dp_run,
.sync = jtag_dp_sync,
+ .quit = jtag_quit,
};
-
-
-static const uint8_t swd2jtag_bitseq[] = {
- /* More than 50 TCK/SWCLK cycles with TMS/SWDIO high,
- * putting both JTAG and SWD logic into reset state.
- */
- 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
- /* Switching equence disables SWD and enables JTAG
- * NOTE: bits in the DP's IDCODE can expose the need for
- * the old/deprecated sequence (0xae 0xde).
- */
- 0x3c, 0xe7,
- /* At least 50 TCK/SWCLK cycles with TMS/SWDIO high,
- * putting both JTAG and SWD logic into reset state.
- * NOTE: some docs say "at least 5".
- */
- 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
-};
-
-/** Put the debug link into JTAG mode, if the target supports it.
- * The link's initial mode may be either SWD or JTAG.
- *
- * @param target Enters JTAG mode (if possible).
- *
- * Note that targets implemented with SW-DP do not support JTAG, and
- * that some targets which could otherwise support it may have been
- * configured to disable JTAG signaling
- *
- * @return ERROR_OK or else a fault code.
- */
-int dap_to_jtag(struct target *target)
-{
- int retval;
-
- LOG_DEBUG("Enter JTAG mode");
-
- /* REVISIT it's nasty to need to make calls to a "jtag"
- * subsystem if the link isn't in JTAG mode...
- */
-
- retval = jtag_add_tms_seq(8 * sizeof(swd2jtag_bitseq),
- swd2jtag_bitseq, TAP_RESET);
- if (retval == ERROR_OK)
- retval = jtag_execute_queue();
-
- /* REVISIT set up the DAP's ops vector for JTAG mode. */
-
- return retval;
-}
Code Review / openocd.git / blobdiff