* 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.,
- * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
***************************************************************************/
/**
#include "arm.h"
#include "arm_adi_v5.h"
#include <helper/time_support.h>
+#include <helper/list.h>
+/*#define DEBUG_WAIT*/
/* JTAG instructions/registers for JTAG-DP and SWJ-DP */
#define JTAG_DP_ABORT 0x8
#define JTAG_ACK_OK_FAULT 0x2
#define JTAG_ACK_WAIT 0x1
+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)
+{
+ char *reg_name = "UNK";
+
+ if (instr == JTAG_DP_DPACC) {
+ switch (reg_addr) {
+ case DP_ABORT:
+ reg_name = "ABORT";
+ break;
+ case DP_CTRL_STAT:
+ reg_name = "CTRL/STAT";
+ break;
+ case DP_SELECT:
+ reg_name = "SELECT";
+ break;
+ case DP_RDBUFF:
+ reg_name = "RDBUFF";
+ break;
+ case DP_WCR:
+ reg_name = "WCR";
+ break;
+ default:
+ reg_name = "UNK";
+ break;
+ }
+ }
+
+ if (instr == JTAG_DP_APACC) {
+ switch (reg_addr) {
+ case MEM_AP_REG_CSW:
+ reg_name = "CSW";
+ break;
+ case MEM_AP_REG_TAR:
+ reg_name = "TAR";
+ break;
+ case MEM_AP_REG_DRW:
+ reg_name = "DRW";
+ break;
+ case MEM_AP_REG_BD0:
+ reg_name = "BD0";
+ break;
+ case MEM_AP_REG_BD1:
+ reg_name = "BD1";
+ break;
+ case MEM_AP_REG_BD2:
+ reg_name = "BD2";
+ break;
+ case MEM_AP_REG_BD3:
+ reg_name = "BD3";
+ break;
+ case MEM_AP_REG_CFG:
+ reg_name = "CFG";
+ break;
+ case MEM_AP_REG_BASE:
+ reg_name = "BASE";
+ break;
+ case AP_REG_IDR:
+ reg_name = "IDR";
+ break;
+ default:
+ reg_name = "UNK";
+ break;
+ }
+ }
+
+ return reg_name;
+}
+#endif
+
+struct dap_cmd {
+ struct list_head lh;
+ uint8_t instr;
+ uint8_t reg_addr;
+ uint8_t RnW;
+ uint8_t *invalue;
+ uint8_t ack;
+ uint32_t memaccess_tck;
+ uint32_t dp_select;
+
+ struct scan_field fields[2];
+ uint8_t out_addr_buf;
+ uint8_t invalue_buf[4];
+ uint8_t outvalue_buf[4];
+};
+
+static void log_dap_cmd(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",
+ buf_get_u32(el->outvalue_buf, 0, 32),
+ buf_get_u32(el->invalue, 0, 32),
+ el->ack == JTAG_ACK_OK_FAULT ? "OK" :
+ (el->ack == JTAG_ACK_WAIT ? "WAIT" : "INVAL"));
+#endif
+}
+
+static struct dap_cmd *dap_cmd_new(uint8_t instr,
+ uint8_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;
+ }
+
+ return cmd;
+}
+
+static void flush_journal(struct list_head *lh)
+{
+ struct dap_cmd *el, *tmp;
+
+ list_for_each_entry_safe(el, tmp, lh, lh) {
+ list_del(&el->lh);
+ free(el);
+ }
+}
+
/***************************************************************************
*
* DPACC and APACC scanchain access through JTAG-DP (or SWJ-DP)
*
***************************************************************************/
+static int adi_jtag_dp_scan_cmd(struct adiv5_dap *dap, struct dap_cmd *cmd, uint8_t *ack)
+{
+ struct jtag_tap *tap = dap->tap;
+ int retval;
+
+ retval = arm_jtag_set_instr(tap, cmd->instr, NULL, TAP_IDLE);
+ if (retval != ERROR_OK)
+ return retval;
+
+ /* Scan out a read or write operation using some DP or AP register.
+ * 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));
+ cmd->fields[0].out_value = &cmd->out_addr_buf;
+ cmd->fields[0].in_value = (ack != NULL) ? 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.
+ * When overrun detect is active, STICKYORUN is set.
+ */
+
+ cmd->fields[1].num_bits = 32;
+ cmd->fields[1].out_value = cmd->outvalue_buf;
+ cmd->fields[1].in_value = cmd->invalue;
+
+ jtag_add_dr_scan(tap, 2, cmd->fields, TAP_IDLE);
+
+ /* Add specified number of tck clocks after starting memory bus
+ * access, giving the hardware time to complete the access.
+ * They provide more time for the (MEM) AP to complete the read ...
+ * 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))
+ jtag_add_runtest(cmd->memaccess_tck, TAP_IDLE);
+ }
+
+ return ERROR_OK;
+}
+
+static int adi_jtag_dp_scan_cmd_sync(struct adiv5_dap *dap, struct dap_cmd *cmd, uint8_t *ack)
+{
+ int retval;
+
+ retval = adi_jtag_dp_scan_cmd(dap, cmd, ack);
+ if (retval != ERROR_OK)
+ return retval;
+
+ return jtag_execute_queue();
+}
+
/**
* Scan DPACC or APACC using target ordered uint8_t buffers. No endianness
* conversions are performed. See section 4.4.3 of the ADIv5 spec, which
* @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
+ * @param memaccess_tck number of idle cycles to add after AP access
*/
-/* FIXME don't export ... this is a temporary workaround for the
- * mem_ap_read_buf_u32() mess, until it's no longer JTAG-specific.
- */
-int adi_jtag_dp_scan(struct adiv5_dap *dap,
+static int adi_jtag_dp_scan(struct adiv5_dap *dap,
uint8_t instr, uint8_t reg_addr, uint8_t RnW,
- uint8_t *outvalue, uint8_t *invalue, uint8_t *ack)
+ uint8_t *outvalue, uint8_t *invalue,
+ uint32_t memaccess_tck, uint8_t *ack)
{
- struct arm_jtag *jtag_info = dap->jtag_info;
- struct scan_field fields[2];
- uint8_t out_addr_buf;
-
- jtag_set_end_state(TAP_IDLE);
- arm_jtag_set_instr(jtag_info, instr, NULL, TAP_IDLE);
-
- /* Scan out a read or write operation using some DP or AP register.
- * For APACC access with any sticky error flag set, this is discarded.
- */
- fields[0].num_bits = 3;
- buf_set_u32(&out_addr_buf, 0, 3, ((reg_addr >> 1) & 0x6) | (RnW & 0x1));
- fields[0].out_value = &out_addr_buf;
- fields[0].in_value = ack;
-
- /* NOTE: if we receive JTAG_ACK_WAIT, the previous operation did not
- * complete; data we write is discarded, data we read is unpredictable.
- * When overrun detect is active, STICKYORUN is set.
- */
+ struct dap_cmd *cmd;
+ int retval;
- fields[1].num_bits = 32;
- fields[1].out_value = outvalue;
- fields[1].in_value = invalue;
+ cmd = dap_cmd_new(instr, reg_addr, RnW, outvalue, invalue, memaccess_tck);
+ if (cmd != NULL)
+ cmd->dp_select = dap->select;
+ else
+ return ERROR_JTAG_DEVICE_ERROR;
- jtag_add_dr_scan(jtag_info->tap, 2, fields, TAP_IDLE);
+ retval = adi_jtag_dp_scan_cmd(dap, cmd, ack);
+ if (retval == ERROR_OK)
+ list_add_tail(&cmd->lh, &dap->cmd_journal);
- /* Add specified number of tck clocks after starting memory bus
- * access, giving the hardware time to complete the access.
- * They provide more time for the (MEM) AP to complete the read ...
- * See "Minimum Response Time" for JTAG-DP, in the ADIv5 spec.
- */
- if ((instr == JTAG_DP_APACC)
- && ((reg_addr == AP_REG_DRW)
- || ((reg_addr & 0xF0) == AP_REG_BD0))
- && (dap->memaccess_tck != 0))
- jtag_add_runtest(dap->memaccess_tck,
- TAP_IDLE);
-
- return jtag_get_error();
+ return retval;
}
/**
*/
static int adi_jtag_dp_scan_u32(struct adiv5_dap *dap,
uint8_t instr, uint8_t reg_addr, uint8_t RnW,
- uint32_t outvalue, uint32_t *invalue, uint8_t *ack)
+ uint32_t outvalue, uint32_t *invalue,
+ uint32_t memaccess_tck, uint8_t *ack)
{
uint8_t out_value_buf[4];
int retval;
buf_set_u32(out_value_buf, 0, 32, outvalue);
retval = adi_jtag_dp_scan(dap, instr, reg_addr, RnW,
- out_value_buf, (uint8_t *)invalue, ack);
+ out_value_buf, (uint8_t *)invalue, memaccess_tck, ack);
if (retval != ERROR_OK)
return retval;
return retval;
}
-/**
- * Utility to write AP registers.
- */
-static inline int adi_jtag_ap_write_check(struct adiv5_dap *dap,
- uint8_t reg_addr, uint8_t *outvalue)
+static int adi_jtag_finish_read(struct adiv5_dap *dap)
{
- return adi_jtag_dp_scan(dap, JTAG_DP_APACC, reg_addr, DPAP_WRITE,
- outvalue, NULL, NULL);
+ int retval = ERROR_OK;
+
+ if (dap->last_read != NULL) {
+ retval = adi_jtag_dp_scan_u32(dap, JTAG_DP_DPACC,
+ DP_RDBUFF, DPAP_READ, 0, dap->last_read, 0, NULL);
+ dap->last_read = NULL;
+ }
+
+ return retval;
}
static int adi_jtag_scan_inout_check_u32(struct adiv5_dap *dap,
uint8_t instr, uint8_t reg_addr, uint8_t RnW,
- uint32_t outvalue, uint32_t *invalue)
+ 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, 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 != NULL)) {
retval = adi_jtag_dp_scan_u32(dap, JTAG_DP_DPACC,
- DP_RDBUFF, DPAP_READ, 0, invalue, &dap->ack);
- return retval;
+ DP_RDBUFF, DPAP_READ, 0, invalue, 0, NULL);
+ if (retval != ERROR_OK)
+ return retval;
+ }
+
+ return jtag_execute_queue();
}
-static int jtagdp_transaction_endcheck(struct adiv5_dap *dap)
+static int jtagdp_overrun_check(struct adiv5_dap *dap)
{
int retval;
- uint32_t ctrlstat;
+ struct dap_cmd *el, *tmp, *prev = NULL;
+ int found_wait = 0;
+ int64_t time_now;
+ LIST_HEAD(replay_list);
- /* too expensive to call keep_alive() here */
-
-#if 0
- /* Danger!!!! BROKEN!!!! */
- adi_jtag_scan_inout_check_u32(dap, JTAG_DP_DPACC,
- DP_CTRL_STAT, DPAP_READ, 0, &ctrlstat);
- /* Danger!!!! BROKEN!!!! Why will jtag_execute_queue() fail here????
- R956 introduced the check on return value here and now Michael Schwingen reports
- that this code no longer works....
-
- https://lists.berlios.de/pipermail/openocd-development/2008-September/003107.html
- */
- if ((retval = jtag_execute_queue()) != ERROR_OK)
- {
- LOG_ERROR("BUG: Why does this fail the first time????");
+ /* make sure all queued transactions are complete */
+ retval = jtag_execute_queue();
+ if (retval != ERROR_OK)
+ goto done;
+
+ /* 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);
+ } 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);
+ retval = ERROR_JTAG_DEVICE_ERROR;
+ goto done;
+ }
}
- /* Why??? second time it works??? */
-#endif
- /* Post CTRL/STAT read; discard any previous posted read value
- * but collect its ACK status.
+ /*
+ * If we found a stalled transaction and a previous transaction
+ * exists, check if it's a READ access.
*/
- adi_jtag_scan_inout_check_u32(dap, JTAG_DP_DPACC,
- DP_CTRL_STAT, DPAP_READ, 0, &ctrlstat);
- if ((retval = jtag_execute_queue()) != ERROR_OK)
- return retval;
-
- dap->ack = dap->ack & 0x7;
-
- /* common code path avoids calling timeval_ms() */
- if (dap->ack != JTAG_ACK_OK_FAULT)
- {
- long long then = timeval_ms();
-
- while (dap->ack != JTAG_ACK_OK_FAULT)
- {
- if (dap->ack == JTAG_ACK_WAIT)
- {
- if ((timeval_ms()-then) > 1000)
- {
- /* NOTE: this would be a good spot
- * to use JTAG_DP_ABORT.
- */
- LOG_WARNING("Timeout (1000ms) waiting "
- "for ACK=OK/FAULT "
- "in JTAG-DP transaction");
- return ERROR_JTAG_DEVICE_ERROR;
+ 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);
+ /* 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);
+ if (el->invalue != el->invalue_buf) {
+ uint32_t invalue = le_to_h_u32(tmp->invalue);
+ memcpy(el->invalue, &invalue, sizeof(uint32_t));
+ }
+ prev = NULL;
+ break;
}
}
- else
- {
- LOG_WARNING("Invalid ACK %#x "
- "in JTAG-DP transaction",
- dap->ack);
- return ERROR_JTAG_DEVICE_ERROR;
- }
- adi_jtag_scan_inout_check_u32(dap, JTAG_DP_DPACC,
- DP_CTRL_STAT, DPAP_READ, 0, &ctrlstat);
- if ((retval = dap_run(dap)) != ERROR_OK)
- return retval;
- dap->ack = dap->ack & 0x7;
+ if (prev != NULL) {
+ log_dap_cmd("LST", el);
+
+ /*
+ * At this point we're sure that no previous
+ * transaction completed and the DAP/AP is still
+ * in busy state. We know that the next "OK" scan
+ * will return the READ result we need to recover.
+ * To complete the READ, we just keep polling RDBUFF
+ * until the WAIT condition clears
+ */
+ tmp = dap_cmd_new(JTAG_DP_DPACC,
+ DP_RDBUFF, DPAP_READ, NULL, NULL, 0);
+ if (tmp == NULL) {
+ retval = ERROR_JTAG_DEVICE_ERROR;
+ goto done;
+ }
+ /* synchronously retry the command until it succeeds */
+ time_now = timeval_ms();
+ do {
+ retval = adi_jtag_dp_scan_cmd_sync(dap, tmp, NULL);
+ if (retval != ERROR_OK)
+ break;
+ if (tmp->ack == JTAG_ACK_OK_FAULT) {
+ log_dap_cmd("FND", tmp);
+ if (el->invalue != el->invalue_buf) {
+ uint32_t invalue = le_to_h_u32(tmp->invalue);
+ memcpy(el->invalue, &invalue, sizeof(uint32_t));
+ }
+ break;
+ }
+ if (tmp->ack != JTAG_ACK_WAIT) {
+ LOG_ERROR("Invalid ACK (%1x) in DAP response", tmp->ack);
+ log_dap_cmd("ERR", tmp);
+ retval = ERROR_JTAG_DEVICE_ERROR;
+ break;
+ }
+
+ } while (timeval_ms() - time_now < 1000);
+
+ if (retval == ERROR_OK) {
+ /* 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);
+
+ if (retval != ERROR_OK)
+ goto done;
+
+ }
+ /* make el->invalue point to the default invalue
+ * so that we can safely retry it without clobbering
+ * the result we just recovered */
+ el->invalue = el->invalue_buf;
}
}
- /* REVISIT also STICKYCMP, for pushed comparisons (nyet used) */
+ /* 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);
+ list_move_tail(&el->lh, &replay_list);
+ }
- /* Check for STICKYERR and STICKYORUN */
- if (ctrlstat & (SSTICKYORUN | SSTICKYERR))
- {
- LOG_DEBUG("jtag-dp: CTRL/STAT error, 0x%" PRIx32, ctrlstat);
- /* Check power to debug regions */
- if ((ctrlstat & 0xf0000000) != 0xf0000000)
- ahbap_debugport_init(dap);
- else
- {
- uint32_t mem_ap_csw, mem_ap_tar;
-
- /* Maybe print information about last intended
- * MEM-AP access; but not if autoincrementing.
- * *Real* CSW and TAR values are always shown.
- */
- if (dap->ap_tar_value != (uint32_t) -1)
- LOG_DEBUG("MEM-AP Cached values: "
- "ap_bank 0x%" PRIx32
- ", ap_csw 0x%" PRIx32
- ", ap_tar 0x%" PRIx32,
- dap->ap_bank_value,
- dap->ap_csw_value,
- dap->ap_tar_value);
-
- if (ctrlstat & SSTICKYORUN)
- LOG_ERROR("JTAG-DP OVERRUN - check clock, "
- "memaccess, or reduce jtag speed");
-
- if (ctrlstat & SSTICKYERR)
- LOG_ERROR("JTAG-DP STICKY ERROR");
-
- /* Clear Sticky Error Bits */
- adi_jtag_scan_inout_check_u32(dap, JTAG_DP_DPACC,
- DP_CTRL_STAT, DPAP_WRITE,
- dap->dp_ctrl_stat | SSTICKYORUN
- | SSTICKYERR, NULL);
- adi_jtag_scan_inout_check_u32(dap, JTAG_DP_DPACC,
- DP_CTRL_STAT, DPAP_READ, 0, &ctrlstat);
- if ((retval = dap_run(dap)) != ERROR_OK)
- return retval;
-
- LOG_DEBUG("jtag-dp: CTRL/STAT 0x%" PRIx32, ctrlstat);
-
- retval = dap_queue_ap_read(dap,
- AP_REG_CSW, &mem_ap_csw);
- if (retval != ERROR_OK)
- return retval;
-
- retval = dap_queue_ap_read(dap,
- AP_REG_TAR, &mem_ap_tar);
- if (retval != ERROR_OK)
- return retval;
-
- if ((retval = dap_run(dap)) != ERROR_OK)
- return retval;
- LOG_ERROR("MEM_AP_CSW 0x%" PRIx32 ", MEM_AP_TAR 0x%"
- PRIx32, mem_ap_csw, mem_ap_tar);
+ /* we're done with the journal, flush it */
+ flush_journal(&dap->cmd_journal);
+
+ /* check for overrun condition in the last batch of transactions */
+ if (found_wait) {
+ LOG_INFO("DAP transaction stalled (WAIT) - slowing down");
+ /* 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)
+ goto done;
+
+ /* 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,
+ DP_SELECT, DPAP_WRITE, (uint8_t *)&el->dp_select, NULL, 0);
+ if (tmp == NULL) {
+ retval = ERROR_JTAG_DEVICE_ERROR;
+ goto done;
+ }
+ list_add(&tmp->lh, &replay_list);
+ dap->select = DP_SELECT_INVALID;
+ }
+
+ list_for_each_entry_safe(el, tmp, &replay_list, lh) {
+ time_now = timeval_ms();
+ do {
+ retval = adi_jtag_dp_scan_cmd_sync(dap, el, NULL);
+ if (retval != ERROR_OK)
+ break;
+ log_dap_cmd("REC", el);
+ if (el->ack == JTAG_ACK_OK_FAULT) {
+ if (el->invalue != el->invalue_buf) {
+ uint32_t invalue = le_to_h_u32(el->invalue);
+ memcpy(el->invalue, &invalue, sizeof(uint32_t));
+ }
+ break;
+ }
+ if (el->ack != JTAG_ACK_WAIT) {
+ LOG_ERROR("Invalid ACK (%1x) in DAP response", el->ack);
+ log_dap_cmd("ERR", el);
+ retval = ERROR_JTAG_DEVICE_ERROR;
+ 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;
}
- if ((retval = dap_run(dap)) != ERROR_OK)
- return retval;
- return ERROR_JTAG_DEVICE_ERROR;
}
- return ERROR_OK;
+ done:
+ flush_journal(&replay_list);
+ flush_journal(&dap->cmd_journal);
+ return retval;
}
-/*--------------------------------------------------------------------------*/
-
-static int jtag_idcode_q_read(struct adiv5_dap *dap,
- uint8_t *ack, uint32_t *data)
+static int jtagdp_transaction_endcheck(struct adiv5_dap *dap)
{
- struct arm_jtag *jtag_info = dap->jtag_info;
int retval;
- struct scan_field fields[1];
+ uint32_t ctrlstat;
- /* This is a standard JTAG operation -- no DAP tweakage */
- jtag_set_end_state(TAP_IDLE);
- retval = arm_jtag_set_instr(jtag_info, JTAG_DP_IDCODE, NULL, TAP_IDLE);
+ /* too expensive to call keep_alive() here */
+
+ /* Post CTRL/STAT read; discard any previous posted read value
+ * but collect its ACK status.
+ */
+ retval = adi_jtag_scan_inout_check_u32(dap, JTAG_DP_DPACC,
+ DP_CTRL_STAT, DPAP_READ, 0, &ctrlstat, 0);
if (retval != ERROR_OK)
- return retval;
+ goto done;
- fields[0].num_bits = 32;
- fields[0].out_value = NULL;
- fields[0].in_value = (void *) data;
+ /* REVISIT also STICKYCMP, for pushed comparisons (nyet used) */
- jtag_add_dr_scan(jtag_info->tap, 1, fields, TAP_IDLE);
- retval = jtag_get_error();
- if (retval != ERROR_OK)
- return retval;
+ /* Check for STICKYERR */
+ 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)) {
+ LOG_ERROR("Debug regions are unpowered, an unexpected reset might have happened");
+ dap->do_reconnect = true;
+ }
+
+ if (ctrlstat & SSTICKYERR)
+ LOG_ERROR("JTAG-DP STICKY ERROR");
+ if (ctrlstat & SSTICKYORUN)
+ LOG_DEBUG("JTAG-DP STICKY OVERRUN");
- jtag_add_callback(arm_le_to_h_u32,
- (jtag_callback_data_t) data);
+ /* Clear Sticky Error Bits */
+ retval = adi_jtag_scan_inout_check_u32(dap, JTAG_DP_DPACC,
+ DP_CTRL_STAT, DPAP_WRITE,
+ dap->dp_ctrl_stat | SSTICKYERR, NULL, 0);
+ if (retval != ERROR_OK)
+ goto done;
+ retval = ERROR_JTAG_DEVICE_ERROR;
+ }
+
+ done:
+ flush_journal(&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_dp_q_read(struct adiv5_dap *dap, unsigned reg,
uint32_t *data)
{
- return adi_jtag_scan_inout_check_u32(dap, JTAG_DP_DPACC,
- reg, DPAP_READ, 0, data);
+ int 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)
{
- return adi_jtag_scan_inout_check_u32(dap, JTAG_DP_DPACC,
- reg, DPAP_WRITE, data, NULL);
+ int 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;
}
/** Select the AP register bank matching bits 7:4 of reg. */
-static int jtag_ap_q_bankselect(struct adiv5_dap *dap, unsigned reg)
+static int jtag_ap_q_bankselect(struct adiv5_ap *ap, unsigned reg)
{
- uint32_t select = reg & 0x000000F0;
+ struct adiv5_dap *dap = ap->dap;
+ uint32_t sel = ((uint32_t)ap->ap_num << 24) | (reg & 0x000000F0);
- if (select == dap->ap_bank_value)
+ if (sel == dap->select)
return ERROR_OK;
- dap->ap_bank_value = select;
- select |= dap->apsel;
+ dap->select = sel;
- return jtag_dp_q_write(dap, DP_SELECT, select);
+ return jtag_dp_q_write(dap, DP_SELECT, sel);
}
-static int jtag_ap_q_read(struct adiv5_dap *dap, unsigned reg,
+static int jtag_ap_q_read(struct adiv5_ap *ap, unsigned reg,
uint32_t *data)
{
- int retval = jtag_ap_q_bankselect(dap, reg);
+ int 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;
- return adi_jtag_scan_inout_check_u32(dap, JTAG_DP_APACC, reg,
- DPAP_READ, 0, data);
+ retval = adi_jtag_dp_scan_u32(ap->dap, JTAG_DP_APACC, reg,
+ DPAP_READ, 0, ap->dap->last_read, ap->memaccess_tck, NULL);
+ ap->dap->last_read = data;
+
+ return retval;
}
-static int jtag_ap_q_write(struct adiv5_dap *dap, unsigned reg,
+static int jtag_ap_q_write(struct adiv5_ap *ap, unsigned reg,
uint32_t data)
{
- uint8_t out_value_buf[4];
-
- int retval = jtag_ap_q_bankselect(dap, reg);
+ int retval = jtag_check_reconnect(ap->dap);
if (retval != ERROR_OK)
return retval;
- buf_set_u32(out_value_buf, 0, 32, data);
+ retval = jtag_ap_q_bankselect(ap, reg);
+ if (retval != ERROR_OK)
+ return retval;
- return adi_jtag_ap_write_check(dap, reg, out_value_buf);
+ retval = adi_jtag_dp_scan_u32(ap->dap, JTAG_DP_APACC, reg,
+ DPAP_WRITE, data, ap->dap->last_read, ap->memaccess_tck, NULL);
+ ap->dap->last_read = NULL;
+ return retval;
}
static int jtag_ap_q_abort(struct adiv5_dap *dap, uint8_t *ack)
{
/* for JTAG, this is the only valid ABORT register operation */
- return adi_jtag_dp_scan_u32(dap, JTAG_DP_ABORT,
- 0, DPAP_WRITE, 1, NULL, ack);
+ int retval = adi_jtag_dp_scan_u32(dap, JTAG_DP_ABORT,
+ 0, DPAP_WRITE, 1, NULL, 0, NULL);
+ if (retval != ERROR_OK)
+ return retval;
+
+ return jtag_execute_queue();
}
static int jtag_dp_run(struct adiv5_dap *dap)
{
- return jtagdp_transaction_endcheck(dap);
+ int retval;
+ int retval2 = ERROR_OK;
+
+ retval = adi_jtag_finish_read(dap);
+ if (retval != ERROR_OK)
+ goto done;
+ retval2 = jtagdp_overrun_check(dap);
+ retval = jtagdp_transaction_endcheck(dap);
+
+ done:
+ return (retval2 != ERROR_OK) ? retval2 : retval;
+}
+
+static int jtag_dp_sync(struct adiv5_dap *dap)
+{
+ return jtagdp_overrun_check(dap);
}
/* FIXME don't export ... just initialize as
* part of DAP setup
*/
const struct dap_ops jtag_dp_ops = {
- .queue_idcode_read = jtag_idcode_q_read,
- .queue_dp_read = jtag_dp_q_read,
- .queue_dp_write = jtag_dp_q_write,
- .queue_ap_read = jtag_ap_q_read,
- .queue_ap_write = jtag_ap_q_write,
- .queue_ap_abort = jtag_ap_q_abort,
- .run = jtag_dp_run,
+ .connect = jtag_connect,
+ .queue_dp_read = jtag_dp_q_read,
+ .queue_dp_write = jtag_dp_q_write,
+ .queue_ap_read = jtag_ap_q_read,
+ .queue_ap_write = jtag_ap_q_write,
+ .queue_ap_abort = jtag_ap_q_abort,
+ .run = jtag_dp_run,
+ .sync = jtag_dp_sync,
};
-const uint8_t swd2jtag_bitseq[] = {
+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.
*/
projects / fw / openocd / blobdiff