pandaboard Rev. A6 not compatible with current openocd configs?

[Fabian Fäßler]

Hello,

I got the newer pandaboard Rev. A6 and I try to use openocd to debug the bootloader with JTAG. Using openocd 0.8.0 with `target/omap4430.cfg` I get the following error:

    Open On-Chip Debugger 0.8.0 (2014-05-05-19:09)

    [...]

    Info : JTAG tap: omap4430.jrc tap/device found: 0x6b95c02f (mfg: 0x017, part: 0xb95c, ver: 0x6)

    Warn : JTAG tap: omap4430.jrc       UNEXPECTED: 0x6b95c02f (mfg: 0x017, part: 0xb95c, ver: 0x6)

    Error: JTAG tap: omap4430.jrc  expected 1 of 2: 0x3b95c02f (mfg: 0x017, part: 0xb95c, ver: 0x3)

A quick google search revealed, that is a real device id [1]:

    +#define OMAP4_CONTROL_ID_CODE_ES2_1     0x3B95C02F
    +#define OMAP4_CONTROL_ID_CODE_ES2_2     0x4B95C02F
    +#define OMAP4_CONTROL_ID_CODE_ES2_3     0x6B95C02F

So I changed the value in `target/omap443.cfg` to this id:

    #set _JRC_TAPID  0x3b95c02f

    set _JRC_TAPID  0x6b95c02f

Now it seems to "work", but I still get errors when I try to attach a remote gdb:

    Info : JTAG tap: omap4430.jrc tap/device found: 0x6b95c02f (mfg: 0x017, part: 0xb95c, ver: 0x6)

    Info : JTAG tap: omap4430.dap enabled

    Info : JTAG tap: omap4430.m30_dap enabled

    Info : JTAG tap: omap4430.m31_dap enabled

    Info : omap4430.cpu: hardware has 6 breakpoints, 4 watchpoints

    Info : omap4430.m30: hardware has 6 breakpoints, 4 watchpoints

    Info : omap4430.m31: hardware has 6 breakpoints, 4 watchpoints

    Info : accepting 'gdb' connection from 3333

    Error: Register map is not available yet, the target is not fully initialised

    [...]

    Error: Register map is not available yet, the target is not fully initialised

    undefined debug reason 7 - target needs reset

    Error: Register map is not available yet, the target is not fully initialised

    [...]

    Error: Register map is not available yet, the target is not fully initialised

    Error: Target not halted

    [...]

    Error: cortex_a8_mmu: target not halted

I assume that's because the config file is not compatible with this newer chip(?), and I would have to make more changes?

Does anybody have a working config or knows how to make it compatible? I am new to jtag, openocd and the pandaboard.

Thank you very much,

kind regards,

Fabian

[1] http://lists.infradead.org/pipermail/barebox/2012-February/006092.html