Hi,
I have recently read libswd code and want to somewhat push the SWD progress.
First modification should be to arm_adi_v5.c and/or adi_v5_jtag/swd.c, so that
arm_adi_v5.c could be transport independent.
I found both libswd and my SWD patch modify 2 main functions in arm_adi_v5.c,
which are ahbap_debugport_init and mem_ap_read_buf_u32.
ahbap_debugport_init should obviously be modified to initialize SWD if SWD
transport is sellected.
And mem_ap_read_buf_u32 should not call adi_jtag_dp_scan, or implement
mem_ap_read_buf_u32_jtag and mem_ap_read_buf_u32_swd.
2 solutions:
1. In my SWD patch, I add queue_dp_scan to dap->op, and implement
dap_queue_dp_scan to call dap->op->queue_dp_scan instead of JTAG ones.
And queue_dp_scan is implemented in both jtag_dp_ops and swd_dp_ops.
2. In libswd code, 2 functions are implemented for mem_ap_read_buf_u32, which
are mem_ap_read_buf_u32_jtag and mem_ap_read_buf_u32_swd.
And they are called in mem_ap_read_buf_u32 according to the transport sellected.
So the result is simple, choose one of the 2 methods above.
Both are OK for me if we can make progress.
And I can prepare the patch if any one want to try.
simonqian.openocd
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