From a3245bd7cdd2d8c3740c5e8f31efcd78de67837a Mon Sep 17 00:00:00 2001 From: David Brownell Date: Sat, 27 Feb 2010 00:12:38 -0800 Subject: 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 --- src/jtag/minidummy/minidummy.c | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'src/jtag/minidummy') diff --git a/src/jtag/minidummy/minidummy.c b/src/jtag/minidummy/minidummy.c index 9c608cd..6410c2d 100644 --- a/src/jtag/minidummy/minidummy.c +++ b/src/jtag/minidummy/minidummy.c @@ -147,6 +147,13 @@ int interface_jtag_add_pathmove(int num_states, const tap_state_t *path) return ERROR_OK; } +int interface_add_tms_seq(unsigned num_bits, const uint8_t *seq) +{ + /* synchronously do the operation here */ + + return ERROR_OK; +} + void embeddedice_write_dcc(struct jtag_tap *tap, int reg_addr, uint8_t *buffer, int little, int count) { int i; -- cgit v1.1