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annotate fluid-mnf/README @ 363:6cff3ee315e0

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fluid-mnf/README: work in progress
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 15 Mar 2020 03:02:13 +0000
parents 1f13f0e43e43
children 37d647dfb920
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1 In the summer of 2019 we (FreeCalypso) had recovered a copy of TI's original
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2 FLUID package including source, but this TI original FLUID source targets only
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3 Windows, no Unix or Linux support included. Back in 2007 or earlier Openmoko
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4 had made their own port of FLUID to Linux and we have their Linux/ARM binary,
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5 but the source for that Linux port appears to have been lost.
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6
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7 The present work is an independent (non-Openmoko) port of TI's FLUID to Linux
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8 (can be further ported to other Unixes with some additional work, see below)
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9 made by Mother Mychaela N. Falconia of FreeCalypso, named fluid-mnf in order to
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10 distinguish it from any other Unix/Linux ports of FLUID that may have been made
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11 by unknown other parties.
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12
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13 Purpose and scope
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14 =================
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15
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16 The present fluid-mnf port has been produced as an act of restorative justice,
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17 righting the wrong of Closedmoko not releasing theirs when they made it in 2007
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18 or earlier. The present fluid-mnf port is NOT intended to replace fc-loadtool,
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19 thus a strict limit was put on the extent of work that was done on fluid-mnf:
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20 just enough to right Moko's wrong, plus the minimum extra work that was needed
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21 in order to satisfy my natural curiosity in the area of FLUID working with TI's
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22 own D-Sample board, but no more.
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23
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24 As a result of these strict limits on the scope of the work, neither this
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25 fluid-mnf nor any other known version of FLUID will work on FCDEV3B boards with
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26 Spansion S71PL129N flash - instead our boards with this flash are supported only
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27 by our own fc-loadtool, not FLUID. The ONLY Calypso targets that are expected
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28 to be supported by fluid-mnf (same as TI's original FLUID for Windows) are:
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29
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30 * TI's own D-Sample and Leonardo boards;
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31 * A certain non-TI development board nicknamed Caramel which has a Leonardo
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32 clone as its core but has a D-Sample-like physical form factor;
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33 * Openmoko GTA01 and GTA02 modems.
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34
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35 The present fluid-mnf release has been tested and confirmed to work on the
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36 Mother's D-Sample C05 and Caramel boards, as well as on Openmoko GTA02. It is
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37 NOT expected to work on most other Calypso devices out in the wild.
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38
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39 What is FLUID
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40 =============
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41
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42 FLUID stands for Flash Loader Utility Independent of Device. It is not totally
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43 clear to us (FreeCalypso) exactly what the "independent of device" part is
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44 referring to; it can refer to any or all of the following:
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45
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46 * One can run FLUID, often with the exact same command line, against several
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47 different TI-based GSM device targets, specifically against three different
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48 DBB chip generations (ancient pre-Calypso chips, our familiar Calypso, and
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49 Calypso+), using either the boot ROM protocol on Calypso and Calypso+ or
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50 FLUID's own bootloader (either flash-resident or loaded via JTAG) with its
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51 own protocol, and FLUID goes out of its way to try to autodetect and
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52 automagically support all these target chip and boot entry method variations.
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53
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54 * The flash chip type is autodetected and does not need to be manually selected
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55 by the user. If multiple variations exist of a given product where the
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56 factory has populated different flash chips for whatever part availability
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57 and pricing reasons, but it is otherwise the same product running the same
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58 firmware, one can use FLUID to flash fw updates without worrying about the
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59 flash chip type. Our recent versions of fc-loadtool (since fc-host-tools-r11)
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60 feature the same quality.
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61
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62 * Whenever someone needs to add support for a new flash chip, this addition is
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63 done by editing an ASCII text configuration file (devices.txt) that is read
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64 by FLUID at run time, as opposed to needing to edit the source code and
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65 recompile the program. This distinction was significant in the Windows world,
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66 a culture of software in binary form, but makes absolutely no practical
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67 difference for our fluid-mnf port for the Unix/Linux culture, a much healthier
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68 culture where all software is distributed in source code form and where
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69 compiling from source is a standard part of end user duties.
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70
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71 TI's internal reference platforms on which FLUID was developed and which FLUID
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72 supports as its most native targets are B-Sample through E-Sample:
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73
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74 B-Sample: seems to be Ulysse(s) chipset, very little known
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75 C-Sample: seems to be early Calypso C05 rev A, little known
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76 D-Sample: Calypso C05 rev B or Calypso C035, Iota ABB, Clara RF
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77 E-Sample: Calypso+, apparently existed in both "secure" and "non-secure"
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78 variants
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79
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80 FLUID supports Hercules/Ulysse(s), Calypso and Calypso+ chipsets as follows:
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81
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82 * Hercules and Ulysse(s) predate our familiar Calypso and have no boot ROM.
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83 The standard supported way to recover from blank or bricked flash was to use
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84 JTAG: TI's original FLUID package (fluid-2.27.zip) contains an ulyboot.out
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85 COFF image which you load via JTAG using TI's XDS510 or XDS560 hardware and
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86 CCS software, then FLUID makes its entry via the protocol provided by this
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87 bootloader. Standard firmwares included a flash-resident version of the same
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88 bootloader; as long as you don't brick sector 0, you can then reload newer fw
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89 versions without JTAG.
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90
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91 * On our familiar Calypso, both the old way (JTAG for cold loading, flash-
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92 resident bootloader for warm reloads) and the new way (Calypso boot ROM) are
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93 supported. However, the old way (FLUID bootloader) is supported ONLY on
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94 13 MHz platforms like D-Sample (Clara RF), and is NOT supported on the more
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95 common Calypso+Iota+Rita platforms with 26 MHz clock input to the Calypso.
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96
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97 * We know very little about Calypso+, but apparently it does not offer a
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98 sensible boot ROM protocol like plain Calypso does: instead the choices are
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99 either anti-user-freedom cryptographically restricted boot ("secure" E-Sample
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100 boards) or no boot ROM at all, going back to brickable flash and needing JTAG
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101 for cold loading on "non-secure" E-Sample boards. FLUID (the tool) supports
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102 the old FLUID bootloader on those "non-secure" E-Sample boards, and that
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103 Calypso+ version of the JTAG-loadable FLUID bootloader (calpboot.out) includes
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104 the fix for 26 MHz clock input (E-Sample has Rita RF) - but the plain Calypso
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105 version (calboot.out) does NOT support 26 MHz platforms.
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106
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107 What we have done in fluid-mnf
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108 ==============================
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109
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110 Almost no change in functionality has been made - the objective was to port TI's
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111 tool from Windows to Linux with as little change as possible, changing only
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112 those parts where the Unix/Linux way of life is strictly different from the
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113 Windows way.
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114
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115 The most principal change made in fluid-mnf is the way you specify the serial
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116 port to use to connect to the target. The command line interface design in TI's
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117 original version was thoroughly tied to the Windows model of numbered COM ports:
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118 there was a -p option to select the serial port by number (defaulting to COM1),
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119 but absolutely no provision to specify the serial port by name. Examining
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120 Closedmoko's sans-source ARM/Linux fluid.exe version through a combination of
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121 static analysis and running under strace, we see that they did two things:
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122
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123 1) They changed the numbered "COM" port name generation from "COM%d" to
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parents: 360
diff changeset
124 "/dev/ttySAC%d" - but the command line parser still restricts -p numbers to
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Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
125 the range of [1,24], thus the correct modem tty port /dev/ttySAC0 still
6cff3ee315e0 fluid-mnf/README: work in progress
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parents: 360
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126 cannot be specified in this manner. The default with no -p option and no
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Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
127 FLUID_PORT= environment variable is /dev/ttySAC1, which is garbage because
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
128 that port has the GPS receiver connected to it, not the GSM modem.
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
129
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parents: 360
diff changeset
130 2) They added a hack whereby if a FLUID_PORT= environment variable is defined,
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
131 its value overrides the sprintf-constructed numbered "COM" port name.
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Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
132 Setting FLUID_PORT=/dev/ttySAC0 is the only way to select the correct modem
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
133 tty port with their stupid version.
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Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
134
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parents: 360
diff changeset
135 The following approach has been implemented in fluid-mnf, seeking to be both
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
136 forward-looking in the Unix/Linux culture way and backward-compatible with OM's
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
137 version:
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
138
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parents: 360
diff changeset
139 * -p option in fluid-mnf takes a string argument instead of a number, and this
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
140 string argument is the tty port name.
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
141
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parents: 360
diff changeset
142 * If no -p option is given, the FLUID_PORT= environment variable is consulted.
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Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
143
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parents: 360
diff changeset
144 * If both -p and FLUID_PORT= are given, the -p option takes precedence.
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Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
145
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Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
146 * If neither -p nor FLUID_PORT= is specified, it is a hard error - there is no
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
147 default tty port.
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
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148
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parents: 360
diff changeset
149 The present port uses Linux-specific tty ioctl calls instead of generic termios
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
150 for serial port control, thus it won't compile or run under any other Unixes
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
151 without further porting. It was done this way because of non-standard baud
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Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
152 rates: FLUID supports Calypso high baud rates of 203125, 406250 and 812500 bps,
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
153 as well as D-Sample XXO (eXternal Xtal Oscillator) baud rates of 230400, 460800
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
154 and 921600 bps, and because of POSIX stupidity, supporting all of these baud
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
155 rates in a Unix application requires non-portable hacks.
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
156
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Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
157 All original FLUID code that supports targets other than our familiar Calypso
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
158 (namely, Hercules/Ulysse(s) and Calypso+) has been left completely unchanged;
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
159 while none of this code exhibited any problems compiling for Linux, it is
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
160 completely untested: we have neither the hardware nor any real knowledge of
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Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
161 what it is and how it is supposed to work. For this reason, Calypso is the
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
162 only target platform which we can really vouch for as being supported by
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
163 fluid-mnf. See below regarding what works on D-Sample and what works on the
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Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
164 more common Calypso+Iota+Rita platforms.
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Mychaela Falconia <falcon@freecalypso.org>
parents: 360
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165
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parents: 360
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166 Target-side components of FLUID
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
167 ===============================
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
168
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parents: 360
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169 Like any other tool performing the same function, FLUID consists of not only
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
170 the PC or Unix/Linux application, but also target-side code pieces which are
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
171 fed either to the Calypso boot ROM or to FLUID's other bootloader
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
172 (flash-resident or loaded via JTAG) and which run on the target during the
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
173 flash programming or reading process. In the case of FLUID, these target-side
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
174 components are cmd.m0 and flash "method" drivers (amd.m0, intel.m0 etc),
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
175 performing essentially the same function as loadagent.srec does for our own
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
176 fc-loadtool.
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Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
177
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Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
178 TI's original FLUID package fluid-2.27.zip contains both the sources for these
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
179 components and the deployable *.m0 target binaries. Openmoko left these *.m0
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
180 target components of FLUID completely unchanged in their port, and we are doing
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
181 likewise in fluid-mnf: aside from our cmd39.m0 concoction explained further
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
182 below, all *.m0 files in the target-bin subdirectory in this fluid-mnf release
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
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183 are unchanged from TI's original delivery. I did not even bother with setting
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Mychaela Falconia <falcon@freecalypso.org>
parents: 360
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184 up an environment to recompile them from source with TI's TMS470 toolchain.
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Mychaela Falconia <falcon@freecalypso.org>
parents: 360
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185
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Mychaela Falconia <falcon@freecalypso.org>
parents: 360
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186 Search path for helper files
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Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
187 ============================
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Mychaela Falconia <falcon@freecalypso.org>
parents: 360
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188
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Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
189 FLUID needs to find the just-mentioned *.m0 target binaries as well as the
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Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
190 devices.txt file as helper files. TI's original code looks in the current
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
191 directory, and also tries to look in the directory where the fluid.exe binary
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
192 is located by extracting the path from argv[0] - but the latter method works
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Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
193 only in the Windows culture, not Unix/Linux.
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Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
194
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Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
195 Openmoko kept this helper file search logic completely unchanged in their
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Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
196 version, and they installed both their fluid.exe binary and the helper files in
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Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
197 /usr/sbin. But simply running OM's fluid.exe (never mind the non-sensical .exe
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
198 suffix on a Linux binary) from whatever current directory relying on the shell's
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
199 PATH search does not work: argv[0] will be equal to just "fluid.exe" without
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
200 any path, and TI's Windows-minded code unchanged by OM won't ever figure out
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
201 that it needs to look in /usr/sbin for the needed helper files. OM's official
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Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
202 instructions were to cd to /usr/sbin and run fluid.exe from there - unbelievable
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
203 bogosity.
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
204
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Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
205 The present fluid-mnf port is made more Unix-proper in this regard: we put all
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
206 needed helper files in a designated installation directory
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
207 (/opt/freecalypso/fluid), and the code has been modified to look there instead
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
208 of the usually-null path extracted from argv[0]. The tool still looks in the
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
209 current directory first for every file: changes to TI's FLUID code architecture
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
210 have been kept to a minimum.
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
211
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Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
212 Calypso C05 vs. C035
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
213 ====================
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
214
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Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
215 For all of its claims of device-independence and automagically supporting all
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
216 of various targets, TI's original FLUID as we got it in fluid-2.27.zip fails to
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
217 correctly support older Calypso boards with early Calypso C05 chips on them.
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
218 First Calypso generations (C05 rev A and C05 rev B) have a maximum ARM7 clock
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
219 frequency of 39 MHz, while on the later Calypso C035 (found in most mass-
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
220 produced phones and modems) this maximum frequency has been lifted to 52 MHz.
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Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
221
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Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
222 In TI's FLUID architecture, the target component 'cmd' (cmd.m0 built from cmd.c)
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
223 configures and enables the Calypso DPLL as soon as the host tool tells it that
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
224 the active target is Calypso rather than Ulysse(s). The responsible function
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
225 hardware_init_calypso() in target/cmd.c originally had code that configured
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
226 this DPLL at 39 MHz - then Calypso C035 came along, and someone at TI merrily
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
227 changed that DPLL setup constant from 39 MHz to 52 MHz. So what happens then
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
228 if someone runs TI's FLUID version 2.27 on an older C-Sample, D-Sample or
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
229 Leonardo board that has a Calypso C05 chip on it? Answer: it will produce an
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
230 overclocked chip with unknown consequences - I am not willing to try it on our
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
231 one and only D-Sample C05 board.
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
232
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
233 Trying to improve the architecture of FLUID is strictly beyond the scope of what
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
234 I set out to do in this fluid-mnf port, instead I just needed a way to safely
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
235 run it on our D-Sample C05 board with minimal changes. So I went for the
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
236 minimally-invasive surgical approach:
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
237
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
238 * cmd39.m0 is a modified version of cmd.m0, produced by copying cmd.m0 and
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
239 manually patching the one offending DPLL setup constant, restoring the older
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
240 39 MHz config.
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
241
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Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
242 * fluid-mnf has an added option -oC that causes it to use cmd39.m0 instead of
6cff3ee315e0 fluid-mnf/README: work in progress
Mychaela Falconia <falcon@freecalypso.org>
parents: 360
diff changeset
243 regular cmd.m0.
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244
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245 FLUID operating on D-Sample
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246 ===========================
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247
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248 For anyone lucky to have an original TI D-Sample board (either C05 or C035),
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249 the way FLUID works on it is really awesome:
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250
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251 * Both boot entry methods work: fluid-mnf -oo goes through the Calypso boot ROM
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252 (the older boot ROM version present in Calypso C05 is good enough), whereas
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253 fluid-mnf -oO goes through the other FLUID bootloader, either flash-resident
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254 or loaded via JTAG. (I haven't tried the JTAG way, but fluid-mnf -oO works
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255 on the D-Sample when the flash contains a build of our FC Magnetite
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256 l1reconst-bl configuration.) The extra -oC option is needed for D-Sample C05,
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257 but won't be needed for D-Sample C035, if anyone has one.
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258
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259 * FLUID (both TI's original and our fluid-mnf port) supports Calypso high baud
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260 rates of 203125, 406250 and 812500 bps: just select the desired baud rate with
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261 the -b option. The baud rate switch is effected when the command interpreter
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262 ('cmd' target code piece) is running on the target, which is itself loaded at
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263 115200 baud.
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264
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265 * The D-Sample board has an extra 14.745600 MHz crystal oscillator and a special
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266 circuit (controlled by bits in a register mapped into Calypso nCS3 address
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267 space) that can switch the Calypso clock input from the regular 13 MHz coming
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268 from the RF section to this special 14.745600 clock. Of course no GSM
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269 functions can work in this state, but feeding this special clock to Calypso
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270 allows its UARTs to produce "standard" baud rates of 230400, 460800 and 921600
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271 bps! This feature is apparently called XXO for eXternal Xtal Oscillator, and
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272 is supported by FLUID, including our fluid-mnf port: just select the desired
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273 baud rate with the -b option, and if the target is D-Sample, it will just
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274 magically work. (On more "mere mortal" Calypso targets the result will be a
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275 spectacular failure instead.)
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276
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277 * The D-Sample board also has a block of 16 debug LEDs controlled by another
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278 register mapped into Calypso nCS3 address space, and FLUID's target-side
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279 component (which we haven't modified except for the 39 MHz fix) displays
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280 pretty dancing patterns on these LEDs as it does its work.
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281