* 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 <jtag/swd.h>
-/* YUK! - but this is currently a global.... */
-extern struct jtag_interface *jtag_interface;
static bool do_sync;
static void swd_finish_read(struct adiv5_dap *dap)
{
- const struct swd_driver *swd = jtag_interface->swd;
+ const struct swd_driver *swd = adiv5_dap_swd_driver(dap);
if (dap->last_read != NULL) {
swd->read_reg(swd_cmd(true, false, DP_RDBUFF), dap->last_read, 0);
dap->last_read = NULL;
static void swd_clear_sticky_errors(struct adiv5_dap *dap)
{
- const struct swd_driver *swd = jtag_interface->swd;
+ const struct swd_driver *swd = adiv5_dap_swd_driver(dap);
assert(swd);
swd->write_reg(swd_cmd(false, false, DP_ABORT),
static int swd_run_inner(struct adiv5_dap *dap)
{
- const struct swd_driver *swd = jtag_interface->swd;
+ const struct swd_driver *swd = adiv5_dap_swd_driver(dap);
int retval;
retval = swd->run();
static int swd_connect(struct adiv5_dap *dap)
{
- uint32_t idcode;
+ const struct swd_driver *swd = adiv5_dap_swd_driver(dap);
+ uint32_t dpidr;
int status;
/* FIXME validate transport config ... is the
* configured DAP present (check IDCODE)?
* Is *only* one DAP configured?
*
- * MUST READ IDCODE
+ * MUST READ DPIDR
*/
+ /* Check if we should reset srst already when connecting, but not if reconnecting. */
+ if (!dap->do_reconnect) {
+ enum reset_types jtag_reset_config = jtag_get_reset_config();
+
+ if (jtag_reset_config & RESET_CNCT_UNDER_SRST) {
+ if (jtag_reset_config & RESET_SRST_NO_GATING)
+ swd_add_reset(1);
+ else
+ LOG_WARNING("\'srst_nogate\' reset_config option is required");
+ }
+ }
+
/* Note, debugport_init() does setup too */
- jtag_interface->swd->switch_seq(JTAG_TO_SWD);
+ swd->switch_seq(JTAG_TO_SWD);
- /* Make sure we don't try to perform any other accesses before the DPIDR read. */
+ /* Clear link state, including the SELECT cache. */
dap->do_reconnect = false;
- dap->select = 0;
+ dap_invalidate_cache(dap);
- swd_queue_dp_read(dap, DP_IDCODE, &idcode);
+ swd_queue_dp_read(dap, DP_DPIDR, &dpidr);
/* force clear all sticky faults */
swd_clear_sticky_errors(dap);
status = swd_run_inner(dap);
if (status == ERROR_OK) {
- LOG_INFO("SWD IDCODE %#8.8" PRIx32, idcode);
+ LOG_INFO("SWD DPIDR %#8.8" PRIx32, dpidr);
dap->do_reconnect = false;
+ status = dap_dp_init(dap);
} else
dap->do_reconnect = true;
static int swd_queue_ap_abort(struct adiv5_dap *dap, uint8_t *ack)
{
- const struct swd_driver *swd = jtag_interface->swd;
+ const struct swd_driver *swd = adiv5_dap_swd_driver(dap);
assert(swd);
swd->write_reg(swd_cmd(false, false, DP_ABORT),
/** Select the DP register bank matching bits 7:4 of reg. */
static void swd_queue_dp_bankselect(struct adiv5_dap *dap, unsigned reg)
{
- if (reg == DP_SELECT)
+ /* Only register address 4 is banked. */
+ if ((reg & 0xf) != 4)
return;
uint32_t select_dp_bank = (reg & 0x000000F0) >> 4;
static int swd_queue_dp_read(struct adiv5_dap *dap, unsigned reg,
uint32_t *data)
{
- const struct swd_driver *swd = jtag_interface->swd;
+ const struct swd_driver *swd = adiv5_dap_swd_driver(dap);
assert(swd);
int retval = swd_check_reconnect(dap);
static int swd_queue_dp_write(struct adiv5_dap *dap, unsigned reg,
uint32_t data)
{
- const struct swd_driver *swd = jtag_interface->swd;
+ const struct swd_driver *swd = adiv5_dap_swd_driver(dap);
assert(swd);
int retval = swd_check_reconnect(dap);
static int swd_queue_ap_read(struct adiv5_ap *ap, unsigned reg,
uint32_t *data)
{
- const struct swd_driver *swd = jtag_interface->swd;
- assert(swd);
-
struct adiv5_dap *dap = ap->dap;
+ const struct swd_driver *swd = adiv5_dap_swd_driver(dap);
+ assert(swd);
int retval = swd_check_reconnect(dap);
if (retval != ERROR_OK)
static int swd_queue_ap_write(struct adiv5_ap *ap, unsigned reg,
uint32_t data)
{
- const struct swd_driver *swd = jtag_interface->swd;
- assert(swd);
-
struct adiv5_dap *dap = ap->dap;
+ const struct swd_driver *swd = adiv5_dap_swd_driver(dap);
+ assert(swd);
int retval = swd_check_reconnect(dap);
if (retval != ERROR_OK)
}
const struct dap_ops swd_dap_ops = {
+ .connect = swd_connect,
.queue_dp_read = swd_queue_dp_read,
.queue_dp_write = swd_queue_dp_write,
.queue_ap_read = swd_queue_ap_read,
return retval;
}
-COMMAND_HANDLER(handle_swd_wcr)
-{
- int retval;
- struct target *target = get_current_target(CMD_CTX);
- struct arm *arm = target_to_arm(target);
- struct adiv5_dap *dap = arm->dap;
- uint32_t wcr;
- unsigned trn, scale = 0;
-
- switch (CMD_ARGC) {
- /* no-args: just dump state */
- case 0:
- /*retval = swd_queue_dp_read(dap, DP_WCR, &wcr); */
- retval = dap_queue_dp_read(dap, DP_WCR, &wcr);
- if (retval == ERROR_OK)
- dap->ops->run(dap);
- if (retval != ERROR_OK) {
- LOG_ERROR("can't read WCR?");
- return retval;
- }
-
- command_print(CMD_CTX,
- "turnaround=%" PRIu32 ", prescale=%" PRIu32,
- WCR_TO_TRN(wcr),
- WCR_TO_PRESCALE(wcr));
- return ERROR_OK;
-
- case 2: /* TRN and prescale */
- COMMAND_PARSE_NUMBER(uint, CMD_ARGV[1], scale);
- if (scale > 7) {
- LOG_ERROR("prescale %d is too big", scale);
- return ERROR_FAIL;
- }
- /* FALL THROUGH */
-
- case 1: /* TRN only */
- COMMAND_PARSE_NUMBER(uint, CMD_ARGV[0], trn);
- if (trn < 1 || trn > 4) {
- LOG_ERROR("turnaround %d is invalid", trn);
- return ERROR_FAIL;
- }
-
- wcr = ((trn - 1) << 8) | scale;
- /* FIXME
- * write WCR ...
- * then, re-init adapter with new TRN
- */
- LOG_ERROR("can't yet modify WCR");
- return ERROR_FAIL;
-
- default: /* too many arguments */
- return ERROR_COMMAND_SYNTAX_ERROR;
- }
-}
-
static const struct command_registration swd_commands[] = {
{
/*
.mode = COMMAND_CONFIG,
.help = "declare a new SWD DAP"
},
- {
- .name = "wcr",
- .handler = handle_swd_wcr,
- .mode = COMMAND_ANY,
- .help = "display or update DAP's WCR register",
- .usage = "turnaround (1..4), prescale (0..7)",
- },
-
- /* REVISIT -- add a command for SWV trace on/off */
COMMAND_REGISTRATION_DONE
};
static int swd_select(struct command_context *ctx)
{
+ /* FIXME: only place where global 'jtag_interface' is still needed */
+ extern struct jtag_interface *jtag_interface;
+ const struct swd_driver *swd = jtag_interface->swd;
int retval;
retval = register_commands(ctx, NULL, swd_handlers);
-
if (retval != ERROR_OK)
return retval;
- const struct swd_driver *swd = jtag_interface->swd;
-
/* be sure driver is in SWD mode; start
* with hardware default TRN (1), it can be changed later
*/
return retval;
}
- /* force DAP into SWD mode (not JTAG) */
- /*retval = dap_to_swd(target);*/
-
- if (ctx->current_target) {
- /* force DAP into SWD mode (not JTAG) */
- struct target *target = get_current_target(ctx);
- retval = dap_to_swd(target);
- }
-
return retval;
}
static int swd_init(struct command_context *ctx)
{
- struct target *target = get_current_target(ctx);
- struct arm *arm = target_to_arm(target);
- struct adiv5_dap *dap = arm->dap;
- /* Force the DAP's ops vector for SWD mode.
- * messy - is there a better way? */
- arm->dap->ops = &swd_dap_ops;
-
- return swd_connect(dap);
+ /* nothing done here, SWD is initialized
+ * together with the DAP */
+ return ERROR_OK;
}
static struct transport swd_transport = {
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