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authorØyvind Harboe <oyvind.harboe@zylin.com>2010-03-01 08:25:18 +0100
committerØyvind Harboe <oyvind.harboe@zylin.com>2010-03-16 21:44:38 +0100
commit030ee192dd9647b10ff0841a671facec9d6b833f (patch)
tree3cc50692355eacbe459e1a7e67ccc538f1b81da8 /src/jtag
parent679f6602fd1a7e9763bac52f06bbf2db28098d9a (diff)
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bitbang: add jtag_add_tms_seq support
Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>
Diffstat (limited to 'src/jtag')
-rw-r--r--src/jtag/drivers/at91rm9200.c1
-rw-r--r--src/jtag/drivers/bitbang.c28
-rw-r--r--src/jtag/drivers/dummy.c1
-rw-r--r--src/jtag/drivers/ep93xx.c1
-rw-r--r--src/jtag/drivers/parport.c1
-rw-r--r--src/jtag/drivers/usb_blaster.c1
6 files changed, 33 insertions, 0 deletions
diff --git a/src/jtag/drivers/at91rm9200.c b/src/jtag/drivers/at91rm9200.c
index abaf3adb..89d7000c 100644
--- a/src/jtag/drivers/at91rm9200.c
+++ b/src/jtag/drivers/at91rm9200.c
@@ -126,6 +126,7 @@ struct jtag_interface at91rm9200_interface =
{
.name = "at91rm9200",
+ .supported = DEBUG_CAP_TMS_SEQ,
.execute_queue = bitbang_execute_queue,
.speed = at91rm9200_speed,
diff --git a/src/jtag/drivers/bitbang.c b/src/jtag/drivers/bitbang.c
index 83c2d29e..6159ef7a 100644
--- a/src/jtag/drivers/bitbang.c
+++ b/src/jtag/drivers/bitbang.c
@@ -91,6 +91,31 @@ static void bitbang_state_move(int skip)
tap_set_state(tap_get_end_state());
}
+
+/**
+ * Clock a bunch of TMS (or SWDIO) transitions, to change the JTAG
+ * (or SWD) state machine.
+ */
+static int bitbang_execute_tms(struct jtag_command *cmd)
+{
+ unsigned num_bits = cmd->cmd.tms->num_bits;
+ const uint8_t *bits = cmd->cmd.tms->bits;
+
+ DEBUG_JTAG_IO("TMS: %d bits", num_bits);
+
+ int tms = 0;
+ for (unsigned i = 0; i < num_bits; i++)
+ {
+ tms = ((bits[i/8] >> (i % 8)) & 1);
+ bitbang_interface->write(0, tms, 0);
+ bitbang_interface->write(1, tms, 0);
+ }
+ bitbang_interface->write(CLOCK_IDLE(), tms, 0);
+
+ return ERROR_OK;
+}
+
+
static void bitbang_path_move(struct pathmove_command *cmd)
{
int num_states = cmd->num_states;
@@ -312,6 +337,9 @@ int bitbang_execute_queue(void)
#endif
jtag_sleep(cmd->cmd.sleep->us);
break;
+ case JTAG_TMS:
+ retval = bitbang_execute_tms(cmd);
+ break;
default:
LOG_ERROR("BUG: unknown JTAG command type encountered");
exit(-1);
diff --git a/src/jtag/drivers/dummy.c b/src/jtag/drivers/dummy.c
index 1880712a..7cb0e33c 100644
--- a/src/jtag/drivers/dummy.c
+++ b/src/jtag/drivers/dummy.c
@@ -164,6 +164,7 @@ static const struct command_registration dummy_command_handlers[] = {
struct jtag_interface dummy_interface = {
.name = "dummy",
+ .supported = DEBUG_CAP_TMS_SEQ,
.commands = dummy_command_handlers,
.execute_queue = &bitbang_execute_queue,
diff --git a/src/jtag/drivers/ep93xx.c b/src/jtag/drivers/ep93xx.c
index 61dc76ed..0959a569 100644
--- a/src/jtag/drivers/ep93xx.c
+++ b/src/jtag/drivers/ep93xx.c
@@ -57,6 +57,7 @@ struct jtag_interface ep93xx_interface =
{
.name = "ep93xx",
+ .supported = DEBUG_CAP_TMS_SEQ,
.execute_queue = bitbang_execute_queue,
.speed = ep93xx_speed,
diff --git a/src/jtag/drivers/parport.c b/src/jtag/drivers/parport.c
index fa3373b0..2323ec56 100644
--- a/src/jtag/drivers/parport.c
+++ b/src/jtag/drivers/parport.c
@@ -524,6 +524,7 @@ static const struct command_registration parport_command_handlers[] = {
struct jtag_interface parport_interface = {
.name = "parport",
+ .supported = DEBUG_CAP_TMS_SEQ,
.commands = parport_command_handlers,
.init = parport_init,
diff --git a/src/jtag/drivers/usb_blaster.c b/src/jtag/drivers/usb_blaster.c
index 3703323b..59c5715b 100644
--- a/src/jtag/drivers/usb_blaster.c
+++ b/src/jtag/drivers/usb_blaster.c
@@ -580,6 +580,7 @@ static const struct command_registration usb_blaster_command_handlers[] = {
struct jtag_interface usb_blaster_interface = {
.name = "usb_blaster",
.commands = usb_blaster_command_handlers,
+ .supported = DEBUG_CAP_TMS_SEQ,
.execute_queue = bitbang_execute_queue,