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loadtools: README update
author Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
date Thu, 19 Jun 2014 05:50:43 +0000
parents 3275c8881cb7
children e61eacecd319
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1 The set of host tools built in this directory consists of:
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3 fc-loadtool The tool for operating on Calypso GSM devices at a low
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4 level. After "breaking" into the target GSM device in
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5 its boot process and getting FreeCalypso loadagent
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6 running on the target (out of Calypso internal RAM, aka
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7 IRAM), loadtool presents an interactive command prompt
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8 with commands for peeking and poking registers and most
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9 importantly, reading and writing any part of the
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10 device's non-volatile flash memory.
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12 fc-iram & fc-xram These utilities are intended for FreeCalypso developers
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13 only. They load an S-record code image into IRAM or
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14 XRAM, respectively, induce a transfer of control to the
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15 loaded code, and then drop into a serial line pass-thru
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16 mode for the operator to interact with the thus loaded
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17 target code.
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18
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19 The currently supported target devices are the Compal family of basic
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20 dumbphones, the Openmoko GTA0x GSM modem and the Pirelli DP-L10 feature phone.
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22 All tools in the FreeCalypso loadtools suite work by feeding pieces of code to
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23 the target device as it boots, preventing the booting of its regular firmware
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24 and diverting control to these externally-loaded code pieces. These pieces of
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25 ARM7 target code need to be installed on the host system running loadtools,
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26 normally in /usr/local/share/freecalypso:
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28 loadagent This is the "agent" code that runs on the target device when
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29 fc-loadtool is operating on it: loadtool carries out its
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30 operations by sending commands to loadagent. There is only one
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31 version of loadagent for all currently supported Calypso
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32 targets: loadagent does not access any resources outside of the
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33 Calypso chip itself unless commanded to do so, and loadtool
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34 supports different target devices with different hardware
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35 configurations by sending different commands to loadagent as
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36 appropriate.
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38 compalstage For Compal phones only: a little piece of code that is fed to
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39 the original fw's bootloader via the serial download protocol
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40 provided by the latter; it re-enables the Calypso chip boot ROM
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41 and jumps to it, allowing our loadagent to be loaded in the
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42 same way as on freedom-enabled devices.
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43
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44 If you are working with a development snapshot of the freecalypso-sw source
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45 tree, you will need to compile and install a GNU cross-compiler toolchain
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46 targeting ARM7 (see ../toolchain) and then use that toolchain to compile
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47 loadagent and compalstage (see ../target-utils) before you can successfully use
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48 loadtools to operate on a target device. End-user oriented releases of
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49 FreeCalypso host tools will include prebuilt loadagent and compalstage binaries
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50 in the target-binaries subdirectory.
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52 Installing
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53 ==========
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55 Just run 'make' and 'make install' as usual. If the target-binaries directory
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56 is present, your installation will be complete and ready to use. If you are
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57 building these pieces yourself from source, do a 'make' and 'make install' in
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58 ../target-utils, after you have the ARM7 gcc toolchain installed and working.
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60 Basic usage
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61 ===========
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62
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63 The steps for bringing up fc-loadtool to operate on a target Calypso device are
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64 as follows:
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66 1. If you are using a USB serial adapter, or operating on a Pirelli phone that
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67 has one built in, connect the USB side first so that the necessary
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68 /dev/ttyUSB* device node appears.
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70 2. Run fc-loadtool like this:
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71
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72 fc-loadtool $TARGETOPT /dev/ttyXXX
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74 Change /dev/ttyXXX to the actual serial port you are using, and change
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75 $TARGETOPT to:
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77 Device Needed options
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78 -----------------------------------
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79 Mot C11x/123 -h compal
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80 Mot C139/140 -h compal -c 1003
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81 Mot C155/156 -h c155
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82 Openmoko GTA02 -h gta02
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83 Pirelli DP-L10 -h pirelli
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84
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85 3. Cause the target device to execute its boot path. Openmoko GTA0x and
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86 Pirelli DP-L10 targets have the Calypso boot ROM enabled, and will interrupt
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87 and divert their normal boot path when they "hear" the beacons which
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88 fc-loadtool will be sending down the serial line. Compal phones have this
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89 boot ROM disabled at the board level, but their standard firmware includes a
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90 flash-resident bootloader that offers a different way of interrupting the
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91 boot path and loading code over the serial line; fc-loadtool will be set up
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92 to speak the latter protocol when run with the corresponding options from
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93 the table above.
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95 You will see messages showing fc-loadtool's progress with feeding first
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96 compalstage (if needed), then loadagent (always needed) to the target device,
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97 followed by some target-specific initialization done via loadagent commands.
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98 If all of the above succeeds, you will land at a loadtool> prompt. Type
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99 'help', and it will guide you from there. Alternatively, you can familiarize
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100 yourself with loadtool commands and operations without actually running it by
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101 reading the loadtool.help text file.
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102
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103 For other fc-loadtool options and fc-[ix]ram usage details, see the slightly
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104 outdated README.old file. For newer options added since that file was written,
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105 see the source code. I hope to write some real man pages eventually.
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107 Openmoko GTA0x
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108 ==============
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110 All of the above instructions assume that you are running these loadtools on a
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111 general-purpose host system such as a GNU/Linux PC or laptop, and will
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112 potentially use them to operate on multiple Calypso targets of different kinds.
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113 If instead you are building loadtools to run on the application processor of a
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114 smartphone such as Openmoko GTA0x, then it makes no sense for that special build
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115 of loadtools to support any target other than the specific modem in that
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116 smartphone. Loadtools can be built with compalstage support excluded and with
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117 GTA0x-specific modem power control included instead. This build will still
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118 include a bunch of functions of no relevance to GTA0x, but oh well..
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120 To build loadtools for the GTA0x AP, you'll need to make the following
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121 modifications to the Makefile:
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123 * Change the CC= line to point to the appropriate cross-compiler (which you'll
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124 need to provide yourself);
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125
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126 * Change the CFLAGS= line: add the right options to target the ARM920T core in
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127 the GTA0x AP (e.g., -march=armv4t -mtune=arm920t), and add -DGTA0x_AP_BUILD
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128 to enable some code that makes sense only when running on the GTA0x AP.
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130 * Change EXTRA_OBJ= from listing compalload.o to listing compaldummy.o and
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131 gtapower.o instead.
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a2e793f6b8c4 some README files added
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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132
a2e793f6b8c4 some README files added
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
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133 See gta-ap-build.sed for an example.