FreeCalypso > hg > freecalypso-hwlab

annotate doc/Calypso-OpenOCD-Howto @ 159:a5e2b6e3bdf7

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
fc-uicc-tool: fix-sysmo-msisdn command ported over
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 07 Feb 2021 04:07:24 +0000
parents 6d02f30e35ad
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
63
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1 Using OpenOCD to operate on Calypso JTAG: proof of concept
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
2 ==========================================================
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
3
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
4 We have a proof-of-concept OpenOCD configuration for talking to Calypso JTAG
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
5 based on the theoretical findings described in the Calypso-JTAG-notes document
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
6 in the freecalypso-docs repository; the present document describes how one can
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
7 practically use OpenOCD on an FCDEV3B target.
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
8
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
9 Choice of JTAG adapter hardware
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
10 ===============================
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
11
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
12 The PoC presented here uses an off-the-shelf unbuffered FT2232D breakout board
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
13 with a special EEPROM configuration as the JTAG adapter, as described in the
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
14 Unbuffered-FT2232x-JTAG article. ADBUS0 through ADBUS3 are wired to standard
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
15 JTAG signals as required by FTDI and ADBUS7 (acting as a GPIO) is wired to the
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
16 XDS_RESET line on JTAG connector pin 2. This choice of using a generic FT2232D
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
17 breakout board as opposed to a more purpose-made "professional" JTAG adapter
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
18 was made deliberately in order to force the user to make a mental shift
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
19 regarding reset signals: any standard JTAG adapter product will have two reset
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
20 outputs designated as TRST and SRST, but the XDS_RESET signal on the FCDEV3B
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
21 does not correspond to either of those. But a generic (non-JTAG-specific)
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
22 FT2232x breakout board does not have TRST or SRST, it only has ADBUS and ACBUS
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
23 pins that become GPIOs in MPSSE mode, allowing the user to break out of the
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
24 TRST and SRST mentality: you just have a bunch of GPIOs, then arbitrarily pick
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
25 one of those GPIOs and connect it to XDS_RESET, *without* associating it with
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
26 either TRST or SRST.
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
27
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
28 The full set of needed wire connections is thus:
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
29
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
30 FT2232D signal FCDEV3B JTAG signal
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
31 -----------------------------------
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
32 ADBUS0 TCK (pin 11)
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
33 ADBUS1 TDI (pin 3)
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
34 ADBUS2 TDO (pin 7)
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
35 ADBUS3 TMS (pin 1)
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
36 ADBUS7 XDS_RESET (pin 2)
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
37
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
38 You will also need to connect at least one ground pin, hence 6 wires in total.
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
39 There is no need to connect the undocumented and non-understood EMU0 and EMU1
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
40 signals - we don't know what to do with them and we work without them. This
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
41 wiring arrangement and all functionality described in this article work exactly
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
42 the same way on both D-Sample and FCDEV3B boards. You will also need to
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
43 reprogram the EEPROM on the FT2232D board as described in the
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
44 Unbuffered-FT2232x-JTAG article *before* you connect it to the Calypso target
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
45 board.
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
46
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
47 One can also connect just the 4 JTAG wires, without reset: there are some
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
48 historical commercial phones and modems on which JTAG lines are accessible, but
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
49 Iota nTESTRESET is not, or perhaps nTESTRESET is accessible, but you don't feel
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
50 like replicating the transistor circuit that is required in order to drive it
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
51 safely - the circuit that is present on development boards, but not on hacked-up
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
52 phones and modems. In that case you will still be able to halt an already-
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
53 running Calypso, but of course you won't be able to exercise reset_halt or
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
54 reset_run operations described below.
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
55
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
56 Unpowered FT2232D adapter quirk
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
57 ===============================
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
58
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
59 If you connect the FT2232D board to the FCDEV3B as described above, including
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
60 the XDS_RESET signal and ground, you will notice the following quirk: if the
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
61 custom-crimped JTAG cable is connected between the two boards, but the FT2232D
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
62 board is not plugged into a USB host (has no USB power), the FCDEV3B will be
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
63 held down in test reset: the green LED will be off, and neither button on the
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
64 board will do anything. The FCDEV3B will be released from this reset and will
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
65 boot in test reset mode with the green LED on the moment you plug the FT2232D
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
66 board into your USB host.
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
67
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
68 Running OpenOCD
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
69 ===============
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
70
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
71 With the FT2232D board plugged into your host PC or laptop and programmed with
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
72 the custom USB ID of 0403:7151, you can run OpenOCD with the custom config file
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
73 presented in the calypso-jtag directory in this repository:
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
74
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
75 openocd -f ft2232d-unbuf-poc.cfg
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
76
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
77 Being a proof of concept, this OpenOCD config file does not follow any of the
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
78 guidelines regarding separation between adapters and targets, but is fully
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
79 monolithic instead. This config is written to work with openocd-0.10.0
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
80 (depends on the new ftdi driver), but does NOT use the target/ti_calypso.cfg
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
81 fragment that has been included in mainline OpenOCD for quite some time: in the
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
82 Mother's opinion, the latter is bogus. If someone wishes to bring Calypso
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
83 support in the mainline OpenOCD distribution up to par, I do not have any
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
84 advice or guidance for you: it is your job, not mine. The present PoC config
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
85 that is rather antagonistic to mainline OpenOCD, its framework and its
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
86 guidelines will always remain our standard answer to FreeCalypso customers
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
87 asking how to make JTAG work.
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
88
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
89 When you run OpenOCD as above, the FCDEV3B target needs to be in the running
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
90 state with the green LED on. OpenOCD will exercise and verify the scan chain,
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
91 but it won't issue any resets or halts on its own, thus whatever code was
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
92 running on the board won't be disturbed in any way by the act of running
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
93 OpenOCD. You can then reset and/or halt the target as desired with our custom
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
94 commands (Tcl procedures) as described below.
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
95
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
96 Halting the Calypso without a reset
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
97 ===================================
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
98
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
99 To halt an already-running Calypso ARM7 core without a reset, stopping it at
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
100 whatever point it happens to be in its code execution, execute this sequence:
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
101
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
102 enable_halt; halt
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
103
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
104 The enable_halt step is a custom Tcl procedure added by us, issuing the
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
105 mysterious 0xB instruction and DR scan that are needed in order to enable halts
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
106 on TI's modified version of the ARM7TDMI core. Once you have halted as above,
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
107 you can resume and halt again without needing to re-execute the enable_halt
64
6d02f30e35ad doc/Calypso-OpenOCD-Howto: noted lack of performance optimizations
Mychaela Falconia <falcon@freecalypso.org>
parents: 63
diff changeset
108 step; the only time when the enable_halt step will need to be repeated is when
63
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
109 the Calypso is reset.
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
110
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
111 You can safely halt the Calypso in this manner when the flash is blank and the
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
112 boot ROM waits forever for a serial download, when you have loaded a RAM image
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
113 with fc-xram -j and the target is left in loadagent, or when one of our standard
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
114 firmwares is running; in all of these states the Calypso watchdog timer is
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
115 disabled. However, if you are going to halt the Calypso when the watchdog timer
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
116 is running, you will need to execute our wd (watchdog disable) command quickly
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
117 after the halt, before the watchdog timer is allowed to expire. A simple way
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
118 would be:
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
119
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
120 enable_halt; halt; wd
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
121
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
122 The wd command (Tcl procedure) name was deliberately made short so it can be
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
123 typed quickly with fingers if need be.
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
124
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
125 Resetting with or without a halt
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
126 ================================
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
127
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
128 We don't support OpenOCD's standard reset command because we found it too
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
129 difficult to override its built-in assumptions which are wrong for our Calypso.
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
130 Instead we have our own reset_halt and reset_run custom commands (Tcl
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
131 procedures) that replace OpenOCD's standard 'reset halt' and 'reset run',
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
132 respectively.
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
133
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
134 The reset_run command will reset the board without halting the Calypso, letting
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
135 it boot and run normally. It is equivalent to pressing the RESET button on the
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
136 board with your finger, except that it also re-initializes OpenOCD's scan scain
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
137 and "target examination" state which would otherwise get confused.
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
138
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
139 The reset_halt command will reset the board and halt the Calypso immediately as
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
140 it comes out of reset, halting at the reset vector before the first instruction
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
141 of the boot ROM code (or the first instruction from external memory if operating
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
142 on a D-Sample board with the boot switch set to external) is executed. The
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
143 necessary disabling of the watchdog timer (wd procedure call) is already built
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
144 into the reset_halt Tcl procedure; except for this wd step, all Calypso and Iota
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
145 registers will be in their most pristine reset state.
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
146
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
147 Recovering bricked Compal phones
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
148 ================================
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
149
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
150 Some Mot C1xx phones have Calypso JTAG signals brought out to accessible contact
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
151 pads, allowing a way to recover from a bricked flash bootloader via JTAG.
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
152 However, they do not bring out Iota nTESTRESET, instead they bring out a signal
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
153 which they call DLPWR, which is really Iota RPWON. A procedure similar to our
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
154 reset_halt would need to be performed as the first step in the recovery
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
155 sequence, but it would need to be modified to work with DLPWR instead of
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
156 XDS_RESET. The RPWON aka DLPWR signal will need to be driven with an OC/OD
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
157 driver (it is internally pulled up to raw VBAT, which is not a safe voltage for
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
158 standard 3.3V logic), and the switch-on and boot sequence will be triggered
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
159 when this signal is pulled low, i.e., transitions from high to low. The
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
160 subsequent release transition (from low back to pull-up high) does not matter,
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
161 i.e., RPWON may be permanently pulled down as the Calypso boots and runs, very
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
162 much unlike nTESTRESET or XDS_RESET.
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
163
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
164 It will be up to you to design whatever circuit you wish to use to produce an
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
165 OC/OD driver that can be triggered from OpenOCD, but connecting RPWON aka DLPWR
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
166 directly to an FT2232x I/O pin is not acceptable. Copying the circuit from
64
6d02f30e35ad doc/Calypso-OpenOCD-Howto: noted lack of performance optimizations
Mychaela Falconia <falcon@freecalypso.org>
parents: 63
diff changeset
167 TI/FC development boards that propagates XDS_RESET into nTESTRESET won't work
6d02f30e35ad doc/Calypso-OpenOCD-Howto: noted lack of performance optimizations
Mychaela Falconia <falcon@freecalypso.org>
parents: 63
diff changeset
168 either: this circuit only works when the V-IO regulator is already on, but
6d02f30e35ad doc/Calypso-OpenOCD-Howto: noted lack of performance optimizations
Mychaela Falconia <falcon@freecalypso.org>
parents: 63
diff changeset
169 RPWON is not a reset and will need to be triggered when the chipset is fully
6d02f30e35ad doc/Calypso-OpenOCD-Howto: noted lack of performance optimizations
Mychaela Falconia <falcon@freecalypso.org>
parents: 63
diff changeset
170 "cold".
63
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
171
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
172 You will also need to figure out the appropriate timing. You will need to
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
173 insert a certain delay between RPWON assertion and the 'jtag arp_init' step in
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
174 our reset_halt procedure: the VRPC state machine in the Iota chip will do a
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
175 bunch of work between sensing a low on RPWON and releasing the Calypso from
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
176 reset via ON_nOFF, and until then the JTAG scan chain won't work. But the
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
177 delay cannot be too long either, or you won't halt the Calypso before it starts
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
178 executing bogus code from the phone's bricked flash.
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
179
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
180 Once you do get a working reset_halt variant, the following steps will be
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
181 straightforward:
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
182
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
183 1) Run fc-loadtool -h compal -c none /dev/ttyXXX on the serial port connected
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
184 to the phone's headset jack;
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
185
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
186 2) Enable the boot ROM and jump to it with these commands:
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
187
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
188 mwh 0xFFFFFB10 0x100
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
189 resume 0
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
190
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
191 The boot ROM will run while fc-loadtool is sending its beacons, fc-loadtool
66879ce73b3e doc/Calypso-OpenOCD-Howto article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
192 will load and run loadagent, and you can then recover the flash.
64
6d02f30e35ad doc/Calypso-OpenOCD-Howto: noted lack of performance optimizations
Mychaela Falconia <falcon@freecalypso.org>
parents: 63
diff changeset
193
6d02f30e35ad doc/Calypso-OpenOCD-Howto: noted lack of performance optimizations
Mychaela Falconia <falcon@freecalypso.org>
parents: 63
diff changeset
194 Lack of performance optimizations
6d02f30e35ad doc/Calypso-OpenOCD-Howto: noted lack of performance optimizations
Mychaela Falconia <falcon@freecalypso.org>
parents: 63
diff changeset
195 =================================
6d02f30e35ad doc/Calypso-OpenOCD-Howto: noted lack of performance optimizations
Mychaela Falconia <falcon@freecalypso.org>
parents: 63
diff changeset
196
6d02f30e35ad doc/Calypso-OpenOCD-Howto: noted lack of performance optimizations
Mychaela Falconia <falcon@freecalypso.org>
parents: 63
diff changeset
197 Our PoC OpenOCD-on-Calypso config does not set up a work area (an area of
6d02f30e35ad doc/Calypso-OpenOCD-Howto: noted lack of performance optimizations
Mychaela Falconia <falcon@freecalypso.org>
parents: 63
diff changeset
198 system RAM that is declared as a scratchpad for OpenOCD), nor does it enable
6d02f30e35ad doc/Calypso-OpenOCD-Howto: noted lack of performance optimizations
Mychaela Falconia <falcon@freecalypso.org>
parents: 63
diff changeset
199 arm7_9 dcc_downloads or arm7_9 fast_memory_access. These omissions are
6d02f30e35ad doc/Calypso-OpenOCD-Howto: noted lack of performance optimizations
Mychaela Falconia <falcon@freecalypso.org>
parents: 63
diff changeset
200 intentional, as those performance optimizations are outside of the scope of
6d02f30e35ad doc/Calypso-OpenOCD-Howto: noted lack of performance optimizations
Mychaela Falconia <falcon@freecalypso.org>
parents: 63
diff changeset
201 what I set out to do, which is to prove Calypso JTAG as working and provide a
6d02f30e35ad doc/Calypso-OpenOCD-Howto: noted lack of performance optimizations
Mychaela Falconia <falcon@freecalypso.org>
parents: 63
diff changeset
202 "golden reference" setup.
6d02f30e35ad doc/Calypso-OpenOCD-Howto: noted lack of performance optimizations
Mychaela Falconia <falcon@freecalypso.org>
parents: 63
diff changeset
203
6d02f30e35ad doc/Calypso-OpenOCD-Howto: noted lack of performance optimizations
Mychaela Falconia <falcon@freecalypso.org>
parents: 63
diff changeset
204 If you wish to set up an area in Calypso IRAM as a work area for OpenOCD, which
6d02f30e35ad doc/Calypso-OpenOCD-Howto: noted lack of performance optimizations
Mychaela Falconia <falcon@freecalypso.org>
parents: 63
diff changeset
205 is a prerequisite for arm7_9 dcc_downloads, you will need to choose the location
6d02f30e35ad doc/Calypso-OpenOCD-Howto: noted lack of performance optimizations
Mychaela Falconia <falcon@freecalypso.org>
parents: 63
diff changeset
206 based on your specific application - whether a given area will be suitable or
6d02f30e35ad doc/Calypso-OpenOCD-Howto: noted lack of performance optimizations
Mychaela Falconia <falcon@freecalypso.org>
parents: 63
diff changeset
207 not will depend on exactly what you are debugging and exactly what you are
6d02f30e35ad doc/Calypso-OpenOCD-Howto: noted lack of performance optimizations
Mychaela Falconia <falcon@freecalypso.org>
parents: 63
diff changeset
208 trying to do, which is once again outside of the scope of this PoC.