* 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/>. *
***************************************************************************/
/**
/* project specific includes */
#include <jtag/interface.h>
+#include <jtag/swd.h>
#include <transport/transport.h>
#include <helper/time_support.h>
#include "mpsse.h"
#define JTAG_MODE (LSB_FIRST | POS_EDGE_IN | NEG_EDGE_OUT)
+#define JTAG_MODE_ALT (LSB_FIRST | NEG_EDGE_IN | NEG_EDGE_OUT)
+#define SWD_MODE (LSB_FIRST | POS_EDGE_IN | NEG_EDGE_OUT)
static char *ftdi_device_desc;
static char *ftdi_serial;
+static char *ftdi_location;
static uint8_t ftdi_channel;
+static uint8_t ftdi_jtag_mode = JTAG_MODE;
+
+static bool swd_mode;
#define MAX_USB_IDS 8
/* vid = pid = 0 marks the end of the list */
static struct signal *signals;
+/* FIXME: Where to store per-instance data? We need an SWD context. */
+static struct swd_cmd_queue_entry {
+ uint8_t cmd;
+ uint32_t *dst;
+ uint8_t trn_ack_data_parity_trn[DIV_ROUND_UP(4 + 3 + 32 + 1 + 4, 8)];
+} *swd_cmd_queue;
+static size_t swd_cmd_queue_length;
+static size_t swd_cmd_queue_alloced;
+static int queued_retval;
+static int freq;
+
static uint16_t output;
static uint16_t direction;
+static uint16_t jtag_output_init;
+static uint16_t jtag_direction_init;
+
+static int ftdi_swd_switch_seq(enum swd_special_seq seq);
static struct signal *find_signal_by_name(const char *name)
{
psig = &(*psig)->next;
*psig = calloc(1, sizeof(**psig));
- if (*psig)
- (*psig)->name = strdup(name);
+ if (*psig == NULL)
+ return NULL;
+
+ (*psig)->name = strdup(name);
if ((*psig)->name == NULL) {
free(*psig);
*psig = NULL;
static int ftdi_set_signal(const struct signal *s, char value)
{
- int retval;
bool data;
bool oe;
return ERROR_FAIL;
}
+ uint16_t old_output = output;
+ uint16_t old_direction = direction;
+
output = data ? output | s->data_mask : output & ~s->data_mask;
if (s->oe_mask == s->data_mask)
- direction = oe ? output | s->oe_mask : output & ~s->oe_mask;
+ direction = oe ? direction | s->oe_mask : direction & ~s->oe_mask;
else
output = oe ? output | s->oe_mask : output & ~s->oe_mask;
- retval = mpsse_set_data_bits_low_byte(mpsse_ctx, output & 0xff, direction & 0xff);
- if (retval == ERROR_OK)
- retval = mpsse_set_data_bits_high_byte(mpsse_ctx, output >> 8, direction >> 8);
- if (retval != ERROR_OK) {
- LOG_ERROR("couldn't initialize FTDI GPIO");
- return ERROR_JTAG_INIT_FAILED;
- }
+ if ((output & 0xff) != (old_output & 0xff) || (direction & 0xff) != (old_direction & 0xff))
+ mpsse_set_data_bits_low_byte(mpsse_ctx, output & 0xff, direction & 0xff);
+ if ((output >> 8 != old_output >> 8) || (direction >> 8 != old_direction >> 8))
+ mpsse_set_data_bits_high_byte(mpsse_ctx, output >> 8, direction >> 8);
return ERROR_OK;
}
*
* @param goal_state is the destination state for the move.
*/
-static int move_to_state(tap_state_t goal_state)
+static void move_to_state(tap_state_t goal_state)
{
tap_state_t start_state = tap_get_state();
*/
/* do the 2 lookups */
- int tms_bits = tap_get_tms_path(start_state, goal_state);
+ uint8_t tms_bits = tap_get_tms_path(start_state, goal_state);
int tms_count = tap_get_tms_path_len(start_state, goal_state);
+ assert(tms_count <= 8);
DEBUG_JTAG_IO("start=%s goal=%s", tap_state_name(start_state), tap_state_name(goal_state));
for (int i = 0; i < tms_count; i++)
tap_set_state(tap_state_transition(tap_get_state(), (tms_bits >> i) & 1));
- return mpsse_clock_tms_cs_out(mpsse_ctx,
- (uint8_t *)&tms_bits,
+ mpsse_clock_tms_cs_out(mpsse_ctx,
+ &tms_bits,
0,
tms_count,
false,
- JTAG_MODE);
+ ftdi_jtag_mode);
}
static int ftdi_speed(int speed)
return retval;
}
+ if (!swd_mode && speed >= 10000000 && ftdi_jtag_mode != JTAG_MODE_ALT)
+ LOG_INFO("ftdi: if you experience problems at higher adapter clocks, try "
+ "the command \"ftdi_tdo_sample_edge falling\"");
return ERROR_OK;
}
}
}
-static int ftdi_execute_runtest(struct jtag_command *cmd)
+static void ftdi_execute_runtest(struct jtag_command *cmd)
{
- int retval = ERROR_OK;
int i;
uint8_t zero = 0;
/* TODO: Reuse ftdi_execute_stableclocks */
i = cmd->cmd.runtest->num_cycles;
- while (i > 0 && retval == ERROR_OK) {
+ while (i > 0) {
/* there are no state transitions in this code, so omit state tracking */
unsigned this_len = i > 7 ? 7 : i;
- retval = mpsse_clock_tms_cs_out(mpsse_ctx, &zero, 0, this_len, false, JTAG_MODE);
+ mpsse_clock_tms_cs_out(mpsse_ctx, &zero, 0, this_len, false, ftdi_jtag_mode);
i -= this_len;
}
DEBUG_JTAG_IO("runtest: %i, end in %s",
cmd->cmd.runtest->num_cycles,
tap_state_name(tap_get_end_state()));
- return retval;
}
-static int ftdi_execute_statemove(struct jtag_command *cmd)
+static void ftdi_execute_statemove(struct jtag_command *cmd)
{
- int retval = ERROR_OK;
-
DEBUG_JTAG_IO("statemove end in %s",
tap_state_name(cmd->cmd.statemove->end_state));
/* shortest-path move to desired end state */
if (tap_get_state() != tap_get_end_state() || tap_get_end_state() == TAP_RESET)
move_to_state(tap_get_end_state());
-
- return retval;
}
/**
* Clock a bunch of TMS (or SWDIO) transitions, to change the JTAG
* (or SWD) state machine. REVISIT: Not the best method, perhaps.
*/
-static int ftdi_execute_tms(struct jtag_command *cmd)
+static void ftdi_execute_tms(struct jtag_command *cmd)
{
DEBUG_JTAG_IO("TMS: %d bits", cmd->cmd.tms->num_bits);
/* TODO: Missing tap state tracking, also missing from ft2232.c! */
- return mpsse_clock_tms_cs_out(mpsse_ctx,
+ mpsse_clock_tms_cs_out(mpsse_ctx,
cmd->cmd.tms->bits,
0,
cmd->cmd.tms->num_bits,
false,
- JTAG_MODE);
+ ftdi_jtag_mode);
}
-static int ftdi_execute_pathmove(struct jtag_command *cmd)
+static void ftdi_execute_pathmove(struct jtag_command *cmd)
{
- int retval = ERROR_OK;
-
tap_state_t *path = cmd->cmd.pathmove->path;
int num_states = cmd->cmd.pathmove->num_states;
DEBUG_JTAG_IO("-");
/* this loop verifies that the path is legal and logs each state in the path */
- while (num_states-- && retval == ERROR_OK) {
+ while (num_states--) {
/* either TMS=0 or TMS=1 must work ... */
if (tap_state_transition(tap_get_state(), false)
state_count++;
if (bit_count == 7 || num_states == 0) {
- retval = mpsse_clock_tms_cs_out(mpsse_ctx,
+ mpsse_clock_tms_cs_out(mpsse_ctx,
&tms_byte,
0,
bit_count,
false,
- JTAG_MODE);
+ ftdi_jtag_mode);
bit_count = 0;
}
}
tap_set_end_state(tap_get_state());
-
- return retval;
}
-static int ftdi_execute_scan(struct jtag_command *cmd)
+static void ftdi_execute_scan(struct jtag_command *cmd)
{
- int retval = ERROR_OK;
-
DEBUG_JTAG_IO("%s type:%d", cmd->cmd.scan->ir_scan ? "IRSCAN" : "DRSCAN",
jtag_scan_type(cmd->cmd.scan));
if (cmd->cmd.scan->num_fields == 0) {
LOG_DEBUG("empty scan, doing nothing");
- return retval;
+ return;
}
if (cmd->cmd.scan->ir_scan) {
field->in_value,
0,
field->num_bits - 1,
- JTAG_MODE);
+ ftdi_jtag_mode);
uint8_t last_bit = 0;
if (field->out_value)
bit_copy(&last_bit, 0, field->out_value, field->num_bits - 1, 1);
uint8_t tms_bits = 0x01;
- retval = mpsse_clock_tms_cs(mpsse_ctx,
+ mpsse_clock_tms_cs(mpsse_ctx,
&tms_bits,
0,
field->in_value,
field->num_bits - 1,
1,
last_bit,
- JTAG_MODE);
+ ftdi_jtag_mode);
tap_set_state(tap_state_transition(tap_get_state(), 1));
- retval = mpsse_clock_tms_cs_out(mpsse_ctx,
+ mpsse_clock_tms_cs_out(mpsse_ctx,
&tms_bits,
1,
1,
last_bit,
- JTAG_MODE);
+ ftdi_jtag_mode);
tap_set_state(tap_state_transition(tap_get_state(), 0));
} else
mpsse_clock_data(mpsse_ctx,
field->in_value,
0,
field->num_bits,
- JTAG_MODE);
- if (retval != ERROR_OK) {
- LOG_ERROR("failed to add field %d in scan", i);
- return retval;
- }
+ ftdi_jtag_mode);
}
if (tap_get_state() != tap_get_end_state())
DEBUG_JTAG_IO("%s scan, %i bits, end in %s",
(cmd->cmd.scan->ir_scan) ? "IR" : "DR", scan_size,
tap_state_name(tap_get_end_state()));
- return retval;
-
}
-static int ftdi_execute_reset(struct jtag_command *cmd)
+static void ftdi_execute_reset(struct jtag_command *cmd)
{
DEBUG_JTAG_IO("reset trst: %i srst %i",
cmd->cmd.reset->trst, cmd->cmd.reset->srst);
tap_set_state(TAP_RESET);
struct signal *trst = find_signal_by_name("nTRST");
- if (trst && cmd->cmd.reset->trst == 1) {
- ftdi_set_signal(trst, '0');
- } else if (trst && cmd->cmd.reset->trst == 0) {
+ if (cmd->cmd.reset->trst == 1) {
+ if (trst)
+ ftdi_set_signal(trst, '0');
+ else
+ LOG_ERROR("Can't assert TRST: nTRST signal is not defined");
+ } else if (trst && jtag_get_reset_config() & RESET_HAS_TRST &&
+ cmd->cmd.reset->trst == 0) {
if (jtag_get_reset_config() & RESET_TRST_OPEN_DRAIN)
ftdi_set_signal(trst, 'z');
else
}
struct signal *srst = find_signal_by_name("nSRST");
- if (srst && cmd->cmd.reset->srst == 1) {
- ftdi_set_signal(srst, '0');
- } else if (srst && cmd->cmd.reset->srst == 0) {
+ if (cmd->cmd.reset->srst == 1) {
+ if (srst)
+ ftdi_set_signal(srst, '0');
+ else
+ LOG_ERROR("Can't assert SRST: nSRST signal is not defined");
+ } else if (srst && jtag_get_reset_config() & RESET_HAS_SRST &&
+ cmd->cmd.reset->srst == 0) {
if (jtag_get_reset_config() & RESET_SRST_PUSH_PULL)
ftdi_set_signal(srst, '1');
else
DEBUG_JTAG_IO("trst: %i, srst: %i",
cmd->cmd.reset->trst, cmd->cmd.reset->srst);
- return ERROR_OK;
}
-static int ftdi_execute_sleep(struct jtag_command *cmd)
+static void ftdi_execute_sleep(struct jtag_command *cmd)
{
- int retval = ERROR_OK;
-
DEBUG_JTAG_IO("sleep %" PRIi32, cmd->cmd.sleep->us);
- retval = mpsse_flush(mpsse_ctx);
+ mpsse_flush(mpsse_ctx);
jtag_sleep(cmd->cmd.sleep->us);
DEBUG_JTAG_IO("sleep %" PRIi32 " usec while in %s",
cmd->cmd.sleep->us,
tap_state_name(tap_get_state()));
- return retval;
}
-static int ftdi_execute_stableclocks(struct jtag_command *cmd)
+static void ftdi_execute_stableclocks(struct jtag_command *cmd)
{
- int retval = ERROR_OK;
-
/* this is only allowed while in a stable state. A check for a stable
* state was done in jtag_add_clocks()
*/
/* TODO: Use mpsse_clock_data with in=out=0 for this, if TMS can be set to
* the correct level and remain there during the scan */
- while (num_cycles > 0 && retval == ERROR_OK) {
+ while (num_cycles > 0) {
/* there are no state transitions in this code, so omit state tracking */
unsigned this_len = num_cycles > 7 ? 7 : num_cycles;
- retval = mpsse_clock_tms_cs_out(mpsse_ctx, &tms, 0, this_len, false, JTAG_MODE);
+ mpsse_clock_tms_cs_out(mpsse_ctx, &tms, 0, this_len, false, ftdi_jtag_mode);
num_cycles -= this_len;
}
DEBUG_JTAG_IO("clocks %i while in %s",
cmd->cmd.stableclocks->num_cycles,
tap_state_name(tap_get_state()));
- return retval;
}
-static int ftdi_execute_command(struct jtag_command *cmd)
+static void ftdi_execute_command(struct jtag_command *cmd)
{
- int retval;
-
switch (cmd->type) {
case JTAG_RESET:
- retval = ftdi_execute_reset(cmd);
+ ftdi_execute_reset(cmd);
break;
case JTAG_RUNTEST:
- retval = ftdi_execute_runtest(cmd);
+ ftdi_execute_runtest(cmd);
break;
case JTAG_TLR_RESET:
- retval = ftdi_execute_statemove(cmd);
+ ftdi_execute_statemove(cmd);
break;
case JTAG_PATHMOVE:
- retval = ftdi_execute_pathmove(cmd);
+ ftdi_execute_pathmove(cmd);
break;
case JTAG_SCAN:
- retval = ftdi_execute_scan(cmd);
+ ftdi_execute_scan(cmd);
break;
case JTAG_SLEEP:
- retval = ftdi_execute_sleep(cmd);
+ ftdi_execute_sleep(cmd);
break;
case JTAG_STABLECLOCKS:
- retval = ftdi_execute_stableclocks(cmd);
+ ftdi_execute_stableclocks(cmd);
break;
case JTAG_TMS:
- retval = ftdi_execute_tms(cmd);
+ ftdi_execute_tms(cmd);
break;
default:
LOG_ERROR("BUG: unknown JTAG command type encountered: %d", cmd->type);
- retval = ERROR_JTAG_QUEUE_FAILED;
break;
}
- return retval;
}
static int ftdi_execute_queue(void)
{
- int retval = ERROR_OK;
-
/* blink, if the current layout has that feature */
struct signal *led = find_signal_by_name("LED");
if (led)
for (struct jtag_command *cmd = jtag_command_queue; cmd; cmd = cmd->next) {
/* fill the write buffer with the desired command */
- if (ftdi_execute_command(cmd) != ERROR_OK)
- retval = ERROR_JTAG_QUEUE_FAILED;
+ ftdi_execute_command(cmd);
}
if (led)
ftdi_set_signal(led, '0');
- retval = mpsse_flush(mpsse_ctx);
+ int retval = mpsse_flush(mpsse_ctx);
if (retval != ERROR_OK)
LOG_ERROR("error while flushing MPSSE queue: %d", retval);
static int ftdi_initialize(void)
{
- int retval;
-
if (tap_get_tms_path_len(TAP_IRPAUSE, TAP_IRPAUSE) == 7)
LOG_DEBUG("ftdi interface using 7 step jtag state transitions");
else
for (int i = 0; ftdi_vid[i] || ftdi_pid[i]; i++) {
mpsse_ctx = mpsse_open(&ftdi_vid[i], &ftdi_pid[i], ftdi_device_desc,
- ftdi_serial, ftdi_channel);
+ ftdi_serial, ftdi_location, ftdi_channel);
if (mpsse_ctx)
break;
}
if (!mpsse_ctx)
return ERROR_JTAG_INIT_FAILED;
- retval = mpsse_set_data_bits_low_byte(mpsse_ctx, output & 0xff, direction & 0xff);
- if (retval == ERROR_OK)
- retval = mpsse_set_data_bits_high_byte(mpsse_ctx, output >> 8, direction >> 8);
- if (retval != ERROR_OK) {
- LOG_ERROR("couldn't initialize FTDI with configured layout");
- return ERROR_JTAG_INIT_FAILED;
- }
+ output = jtag_output_init;
+ direction = jtag_direction_init;
- retval = mpsse_loopback_config(mpsse_ctx, false);
- if (retval != ERROR_OK) {
- LOG_ERROR("couldn't write to FTDI to disable loopback");
- return ERROR_JTAG_INIT_FAILED;
+ if (swd_mode) {
+ struct signal *sig = find_signal_by_name("SWD_EN");
+ if (!sig) {
+ LOG_ERROR("SWD mode is active but SWD_EN signal is not defined");
+ return ERROR_JTAG_INIT_FAILED;
+ }
+ /* A dummy SWD_EN would have zero mask */
+ if (sig->data_mask)
+ ftdi_set_signal(sig, '1');
}
+ mpsse_set_data_bits_low_byte(mpsse_ctx, output & 0xff, direction & 0xff);
+ mpsse_set_data_bits_high_byte(mpsse_ctx, output >> 8, direction >> 8);
+
+ mpsse_loopback_config(mpsse_ctx, false);
+
+ freq = mpsse_set_frequency(mpsse_ctx, jtag_get_speed_khz() * 1000);
+
return mpsse_flush(mpsse_ctx);
}
{
mpsse_close(mpsse_ctx);
+ free(swd_cmd_queue);
+
return ERROR_OK;
}
return ERROR_OK;
}
+#ifdef HAVE_LIBUSB_GET_PORT_NUMBERS
+COMMAND_HANDLER(ftdi_handle_location_command)
+{
+ if (CMD_ARGC == 1) {
+ if (ftdi_location)
+ free(ftdi_location);
+ ftdi_location = strdup(CMD_ARGV[0]);
+ } else {
+ return ERROR_COMMAND_SYNTAX_ERROR;
+ }
+
+ return ERROR_OK;
+}
+#endif
+
COMMAND_HANDLER(ftdi_handle_channel_command)
{
if (CMD_ARGC == 1)
if (CMD_ARGC != 2)
return ERROR_COMMAND_SYNTAX_ERROR;
- COMMAND_PARSE_NUMBER(u16, CMD_ARGV[0], output);
- COMMAND_PARSE_NUMBER(u16, CMD_ARGV[1], direction);
+ COMMAND_PARSE_NUMBER(u16, CMD_ARGV[0], jtag_output_init);
+ COMMAND_PARSE_NUMBER(u16, CMD_ARGV[1], jtag_direction_init);
return ERROR_OK;
}
} else if (strcmp("-noe", CMD_ARGV[i]) == 0) {
invert_oe = true;
COMMAND_PARSE_NUMBER(u16, CMD_ARGV[i + 1], oe_mask);
+ } else if (!strcmp("-alias", CMD_ARGV[i]) ||
+ !strcmp("-nalias", CMD_ARGV[i])) {
+ if (!strcmp("-nalias", CMD_ARGV[i]))
+ invert_data = true;
+ struct signal *sig = find_signal_by_name(CMD_ARGV[i + 1]);
+ if (!sig) {
+ LOG_ERROR("signal %s is not defined", CMD_ARGV[i + 1]);
+ return ERROR_FAIL;
+ }
+ data_mask = sig->data_mask;
+ oe_mask = sig->oe_mask;
+ invert_oe = sig->invert_oe;
+ invert_data ^= sig->invert_data;
} else {
LOG_ERROR("unknown option '%s'", CMD_ARGV[i]);
return ERROR_COMMAND_SYNTAX_ERROR;
return ERROR_OK;
}
+COMMAND_HANDLER(ftdi_handle_tdo_sample_edge_command)
+{
+ Jim_Nvp *n;
+ static const Jim_Nvp nvp_ftdi_jtag_modes[] = {
+ { .name = "rising", .value = JTAG_MODE },
+ { .name = "falling", .value = JTAG_MODE_ALT },
+ { .name = NULL, .value = -1 },
+ };
+
+ if (CMD_ARGC > 0) {
+ n = Jim_Nvp_name2value_simple(nvp_ftdi_jtag_modes, CMD_ARGV[0]);
+ if (n->name == NULL)
+ return ERROR_COMMAND_SYNTAX_ERROR;
+ ftdi_jtag_mode = n->value;
+
+ }
+
+ n = Jim_Nvp_value2name_simple(nvp_ftdi_jtag_modes, ftdi_jtag_mode);
+ command_print(CMD_CTX, "ftdi samples TDO on %s edge of TCK", n->name);
+
+ return ERROR_OK;
+}
+
static const struct command_registration ftdi_command_handlers[] = {
{
.name = "ftdi_device_desc",
.help = "set the serial number of the FTDI device",
.usage = "serial_string",
},
+#ifdef HAVE_LIBUSB_GET_PORT_NUMBERS
+ {
+ .name = "ftdi_location",
+ .handler = &ftdi_handle_location_command,
+ .mode = COMMAND_CONFIG,
+ .help = "set the USB bus location of the FTDI device",
+ .usage = "<bus>:port[,port]...",
+ },
+#endif
{
.name = "ftdi_channel",
.handler = &ftdi_handle_channel_command,
.mode = COMMAND_ANY,
.help = "define a signal controlled by one or more FTDI GPIO as data "
"and/or output enable",
- .usage = "name [-data mask|-ndata mask] [-oe mask|-noe mask]",
+ .usage = "name [-data mask|-ndata mask] [-oe mask|-noe mask] [-alias|-nalias name]",
},
{
.name = "ftdi_set_signal",
.help = "the vendor ID and product ID of the FTDI device",
.usage = "(vid pid)* ",
},
+ {
+ .name = "ftdi_tdo_sample_edge",
+ .handler = &ftdi_handle_tdo_sample_edge_command,
+ .mode = COMMAND_ANY,
+ .help = "set which TCK clock edge is used for sampling TDO "
+ "- default is rising-edge (Setting to falling-edge may "
+ "allow signalling speed increase)",
+ .usage = "(rising|falling)",
+ },
COMMAND_REGISTRATION_DONE
};
+static int create_default_signal(const char *name, uint16_t data_mask)
+{
+ struct signal *sig = create_signal(name);
+ if (!sig) {
+ LOG_ERROR("failed to create signal %s", name);
+ return ERROR_FAIL;
+ }
+ sig->invert_data = false;
+ sig->data_mask = data_mask;
+ sig->invert_oe = false;
+ sig->oe_mask = 0;
+
+ return ERROR_OK;
+}
+
+static int create_signals(void)
+{
+ if (create_default_signal("TCK", 0x01) != ERROR_OK)
+ return ERROR_FAIL;
+ if (create_default_signal("TDI", 0x02) != ERROR_OK)
+ return ERROR_FAIL;
+ if (create_default_signal("TDO", 0x04) != ERROR_OK)
+ return ERROR_FAIL;
+ if (create_default_signal("TMS", 0x08) != ERROR_OK)
+ return ERROR_FAIL;
+ return ERROR_OK;
+}
+
+static int ftdi_swd_init(void)
+{
+ LOG_INFO("FTDI SWD mode enabled");
+ swd_mode = true;
+
+ if (create_signals() != ERROR_OK)
+ return ERROR_FAIL;
+
+ swd_cmd_queue_alloced = 10;
+ swd_cmd_queue = malloc(swd_cmd_queue_alloced * sizeof(*swd_cmd_queue));
+
+ return swd_cmd_queue != NULL ? ERROR_OK : ERROR_FAIL;
+}
+
+static void ftdi_swd_swdio_en(bool enable)
+{
+ struct signal *oe = find_signal_by_name("SWDIO_OE");
+ if (oe)
+ ftdi_set_signal(oe, enable ? '1' : '0');
+}
+
+/**
+ * Flush the MPSSE queue and process the SWD transaction queue
+ * @param dap
+ * @return
+ */
+static int ftdi_swd_run_queue(void)
+{
+ LOG_DEBUG("Executing %zu queued transactions", swd_cmd_queue_length);
+ int retval;
+ struct signal *led = find_signal_by_name("LED");
+
+ if (queued_retval != ERROR_OK) {
+ LOG_DEBUG("Skipping due to previous errors: %d", queued_retval);
+ goto skip;
+ }
+
+ /* A transaction must be followed by another transaction or at least 8 idle cycles to
+ * ensure that data is clocked through the AP. */
+ mpsse_clock_data_out(mpsse_ctx, NULL, 0, 8, SWD_MODE);
+
+ /* Terminate the "blink", if the current layout has that feature */
+ if (led)
+ ftdi_set_signal(led, '0');
+
+ queued_retval = mpsse_flush(mpsse_ctx);
+ if (queued_retval != ERROR_OK) {
+ LOG_ERROR("MPSSE failed");
+ goto skip;
+ }
+
+ for (size_t i = 0; i < swd_cmd_queue_length; i++) {
+ int ack = buf_get_u32(swd_cmd_queue[i].trn_ack_data_parity_trn, 1, 3);
+
+ LOG_DEBUG("%s %s %s reg %X = %08"PRIx32,
+ ack == SWD_ACK_OK ? "OK" : ack == SWD_ACK_WAIT ? "WAIT" : ack == SWD_ACK_FAULT ? "FAULT" : "JUNK",
+ swd_cmd_queue[i].cmd & SWD_CMD_APnDP ? "AP" : "DP",
+ swd_cmd_queue[i].cmd & SWD_CMD_RnW ? "read" : "write",
+ (swd_cmd_queue[i].cmd & SWD_CMD_A32) >> 1,
+ buf_get_u32(swd_cmd_queue[i].trn_ack_data_parity_trn,
+ 1 + 3 + (swd_cmd_queue[i].cmd & SWD_CMD_RnW ? 0 : 1), 32));
+
+ if (ack != SWD_ACK_OK) {
+ queued_retval = ack == SWD_ACK_WAIT ? ERROR_WAIT : ERROR_FAIL;
+ goto skip;
+
+ } else if (swd_cmd_queue[i].cmd & SWD_CMD_RnW) {
+ uint32_t data = buf_get_u32(swd_cmd_queue[i].trn_ack_data_parity_trn, 1 + 3, 32);
+ int parity = buf_get_u32(swd_cmd_queue[i].trn_ack_data_parity_trn, 1 + 3 + 32, 1);
+
+ if (parity != parity_u32(data)) {
+ LOG_ERROR("SWD Read data parity mismatch");
+ queued_retval = ERROR_FAIL;
+ goto skip;
+ }
+
+ if (swd_cmd_queue[i].dst != NULL)
+ *swd_cmd_queue[i].dst = data;
+ }
+ }
+
+skip:
+ swd_cmd_queue_length = 0;
+ retval = queued_retval;
+ queued_retval = ERROR_OK;
+
+ /* Queue a new "blink" */
+ if (led && retval == ERROR_OK)
+ ftdi_set_signal(led, '1');
+
+ return retval;
+}
+
+static void ftdi_swd_queue_cmd(uint8_t cmd, uint32_t *dst, uint32_t data, uint32_t ap_delay_clk)
+{
+ if (swd_cmd_queue_length >= swd_cmd_queue_alloced) {
+ /* Not enough room in the queue. Run the queue and increase its size for next time.
+ * Note that it's not possible to avoid running the queue here, because mpsse contains
+ * pointers into the queue which may be invalid after the realloc. */
+ queued_retval = ftdi_swd_run_queue();
+ struct swd_cmd_queue_entry *q = realloc(swd_cmd_queue, swd_cmd_queue_alloced * 2 * sizeof(*swd_cmd_queue));
+ if (q != NULL) {
+ swd_cmd_queue = q;
+ swd_cmd_queue_alloced *= 2;
+ LOG_DEBUG("Increased SWD command queue to %zu elements", swd_cmd_queue_alloced);
+ }
+ }
+
+ if (queued_retval != ERROR_OK)
+ return;
+
+ size_t i = swd_cmd_queue_length++;
+ swd_cmd_queue[i].cmd = cmd | SWD_CMD_START | SWD_CMD_PARK;
+
+ mpsse_clock_data_out(mpsse_ctx, &swd_cmd_queue[i].cmd, 0, 8, SWD_MODE);
+
+ if (swd_cmd_queue[i].cmd & SWD_CMD_RnW) {
+ /* Queue a read transaction */
+ swd_cmd_queue[i].dst = dst;
+
+ ftdi_swd_swdio_en(false);
+ mpsse_clock_data_in(mpsse_ctx, swd_cmd_queue[i].trn_ack_data_parity_trn,
+ 0, 1 + 3 + 32 + 1 + 1, SWD_MODE);
+ ftdi_swd_swdio_en(true);
+ } else {
+ /* Queue a write transaction */
+ ftdi_swd_swdio_en(false);
+
+ mpsse_clock_data_in(mpsse_ctx, swd_cmd_queue[i].trn_ack_data_parity_trn,
+ 0, 1 + 3 + 1, SWD_MODE);
+
+ ftdi_swd_swdio_en(true);
+
+ buf_set_u32(swd_cmd_queue[i].trn_ack_data_parity_trn, 1 + 3 + 1, 32, data);
+ buf_set_u32(swd_cmd_queue[i].trn_ack_data_parity_trn, 1 + 3 + 1 + 32, 1, parity_u32(data));
+
+ mpsse_clock_data_out(mpsse_ctx, swd_cmd_queue[i].trn_ack_data_parity_trn,
+ 1 + 3 + 1, 32 + 1, SWD_MODE);
+ }
+
+ /* Insert idle cycles after AP accesses to avoid WAIT */
+ if (cmd & SWD_CMD_APnDP)
+ mpsse_clock_data_out(mpsse_ctx, NULL, 0, ap_delay_clk, SWD_MODE);
+
+}
+
+static void ftdi_swd_read_reg(uint8_t cmd, uint32_t *value, uint32_t ap_delay_clk)
+{
+ assert(cmd & SWD_CMD_RnW);
+ ftdi_swd_queue_cmd(cmd, value, 0, ap_delay_clk);
+}
+
+static void ftdi_swd_write_reg(uint8_t cmd, uint32_t value, uint32_t ap_delay_clk)
+{
+ assert(!(cmd & SWD_CMD_RnW));
+ ftdi_swd_queue_cmd(cmd, NULL, value, ap_delay_clk);
+}
+
+static int_least32_t ftdi_swd_frequency(int_least32_t hz)
+{
+ if (hz > 0)
+ freq = mpsse_set_frequency(mpsse_ctx, hz);
+
+ return freq;
+}
+
+static int ftdi_swd_switch_seq(enum swd_special_seq seq)
+{
+ switch (seq) {
+ case LINE_RESET:
+ LOG_DEBUG("SWD line reset");
+ mpsse_clock_data_out(mpsse_ctx, swd_seq_line_reset, 0, swd_seq_line_reset_len, SWD_MODE);
+ break;
+ case JTAG_TO_SWD:
+ LOG_DEBUG("JTAG-to-SWD");
+ mpsse_clock_data_out(mpsse_ctx, swd_seq_jtag_to_swd, 0, swd_seq_jtag_to_swd_len, SWD_MODE);
+ break;
+ case SWD_TO_JTAG:
+ LOG_DEBUG("SWD-to-JTAG");
+ mpsse_clock_data_out(mpsse_ctx, swd_seq_swd_to_jtag, 0, swd_seq_swd_to_jtag_len, SWD_MODE);
+ break;
+ default:
+ LOG_ERROR("Sequence %d not supported", seq);
+ return ERROR_FAIL;
+ }
+
+ return ERROR_OK;
+}
+
+static const struct swd_driver ftdi_swd = {
+ .init = ftdi_swd_init,
+ .frequency = ftdi_swd_frequency,
+ .switch_seq = ftdi_swd_switch_seq,
+ .read_reg = ftdi_swd_read_reg,
+ .write_reg = ftdi_swd_write_reg,
+ .run = ftdi_swd_run_queue,
+};
+
+static const char * const ftdi_transports[] = { "jtag", "swd", NULL };
+
struct jtag_interface ftdi_interface = {
.name = "ftdi",
.supported = DEBUG_CAP_TMS_SEQ,
.commands = ftdi_command_handlers,
- .transports = jtag_only,
+ .transports = ftdi_transports,
+ .swd = &ftdi_swd,
.init = ftdi_initialize,
.quit = ftdi_quit,
projects / openocd / blobdiff