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author | David Brownell <dbrownell@users.sourceforge.net> | 2010-02-27 00:12:38 -0800 |
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committer | David Brownell <dbrownell@users.sourceforge.net> | 2010-02-27 00:12:38 -0800 |
commit | a3245bd7cdd2d8c3740c5e8f31efcd78de67837a (patch) | |
tree | 37448ab9163c86ea221c821b956be11ebd06ebe8 /src/jtag/minidriver.h | |
parent | 4a64820f230a267b1f2e36d4be567074e5b8cb76 (diff) |
interface: define TMS sequence command
For support of SWD we need to be able to clock out special bit
sequences over TMS or SWDIO. Create this as a generic operation,
not yet called by anything, which is split as usual into:
- upper level abstraction ... here, jtag_add_tms_seq();
- midlayer implementation logic hooking that to the lowlevel code;
- lowlevel minidriver operation ... here, interface_add_tms_seq();
- message type for request queue, here JTAG_TMS.
This is done slightly differently than other operations: there's a flag
saying whether the interface driver supports this request. (In fact a
flag *word* so upper layers can learn about other capabilities too ...
for example, supporting SWD operations.)
That approach (flag) lets this method *eventually* be used to eliminate
pathmove() and statemove() support from most adapter drivers, by moving
all that logic into the mid-layer and increasing uniformity between the
various drivers. (Which will in turn reduce subtle bugginess.)
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Diffstat (limited to 'src/jtag/minidriver.h')
-rw-r--r-- | src/jtag/minidriver.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/src/jtag/minidriver.h b/src/jtag/minidriver.h index 2109c75f..5caec58b 100644 --- a/src/jtag/minidriver.h +++ b/src/jtag/minidriver.h @@ -67,6 +67,8 @@ int interface_jtag_add_tlr(void); int interface_jtag_add_pathmove(int num_states, const tap_state_t* path); int interface_jtag_add_runtest(int num_cycles, tap_state_t endstate); +int interface_add_tms_seq(unsigned num_bits, const uint8_t *bits); + /** * This drives the actual srst and trst pins. srst will always be 0 * if jtag_reset_config & RESET_SRST_PULLS_TRST != 0 and ditto for |