FreeCalypso > hg > freecalypso-sw
annotate loadtools/README @ 614:4274171eabd2
gsm-fw/L1/stand/l1_pei.c: getting close to passing compilation
author | Michael Spacefalcon <msokolov@ivan.Harhan.ORG> |
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date | Fri, 29 Aug 2014 18:38:07 +0000 |
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1 The set of host tools built in this directory consists of: |
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2 |
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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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11 |
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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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21 |
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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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27 |
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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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37 |
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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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51 |
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52 Installing |
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53 ========== |
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54 |
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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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59 |
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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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65 |
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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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69 |
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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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73 |
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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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76 |
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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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94 |
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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 Command line options |
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104 ==================== |
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105 |
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106 The fc-loadtool command lines shown above will usually be sufficient. However, |
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107 here is the complete command line description for all 3 tools: |
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108 |
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109 fc-iram [options] ttyport iramimage.srec |
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110 fc-xram [options] ttyport xramimage.srec [2ndprog] |
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111 fc-loadtool [options] ttyport |
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112 |
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113 The available options are common for all 3 utilities, with a few noted |
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114 exceptions: |
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115 |
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116 -a /path/to/loadagent |
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117 |
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118 This option applies only to fc-loadtool and fc-xram. It specifies the |
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119 pathname at which the required loadagent.srec image should be sought, |
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120 overriding the compiled-in default. |
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121 |
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122 -b baud |
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123 |
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124 This option is common for all 3 utilities. It selects the baud rate |
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125 to be used when pushing the IRAM image to the Calypso boot ROM. In the |
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126 case of fc-iram, the selected baud rate will be in effect when the |
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127 loaded IRAM image is jumped to and fc-iram drops into the serial tty |
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128 pass-thru mode; in the case of fc-loadtool, it will be the initial baud |
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129 rate for communicating with loadagent, which can be switched later with |
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130 the baud command. The default is 115200 baud. |
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131 |
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132 -B baud |
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133 |
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134 This option is specific to fc-xram. It selects the baud rate to be |
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135 used when pushing the XRAM image to loadagent. If no -B option is |
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136 specified, fc-xram will communicate with loadagent at the same baud |
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137 rate that was used to load loadagent itself via the Calypso boot ROM |
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138 download protocol, i.e., the rate selected with -b, defaulting to |
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139 115200 baud if no -b option was given either. Neither -b nor -B |
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140 affects the baud rate that will be in effect when the loaded XRAM image |
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141 is jumped to and fc-xram drops into the serial tty pass-thru mode: that |
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142 baud rate independently defaults to 115200 baud and can only be changed |
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143 with the -r option. |
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144 |
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145 -c <compalstage flavor> |
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146 |
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147 This option is common for all 3 utilities. It directs the tools to |
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148 perform the Compal loading stage before proceeding with the Calypso |
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149 boot ROM serial protocol, and selects the "flavor" of compalstage to |
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150 use. As you can see in the source, compalstage is built in 3 different |
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151 versions, for different C1xx models which exhibit different quirks. |
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152 |
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153 This option overrides the compal-stage setting given in the hardware |
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154 parameter file selected with -h or -H; the -c or -C option must be given |
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155 after -h or -H in order to take effect. -c none disables the Compal |
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156 stage and causes the tools to proceed directly to the Calypso boot ROM |
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157 phase, even on targets for which the hardware parameter file specifies |
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158 compal-stage. |
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159 |
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160 -C /path/to/compalstage-binary |
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161 |
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162 This option is just like -c, except that the given argument is used |
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163 directly as the compalstage binary file pathname (absolute or relative) |
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164 without checking or alteration. |
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165 |
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166 -h hwtype |
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167 |
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168 This option is common for all 3 utilities. It selects the specific |
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169 target device configuration to be used. More precisely, it constructs |
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170 a pathname of the form /usr/local/share/freecalypso/%s.config, where %s |
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171 is the argument given to this option, and uses that file as the hardware |
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172 parameter file. |
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173 |
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174 The hardware configurations known to the present release of FreeCalypso |
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175 loadtools are listed in the "Basic usage" section above. |
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176 |
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177 -H /path/to/hwparam-file |
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178 |
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179 This option is just like -h, except that the given argument is used |
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180 directly as the hardware parameter file pathname (absolute or relative) |
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181 without alteration. |
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182 |
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183 -i num |
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184 |
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185 This option is common for all 3 utilities. It specifies the interval |
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186 in milliseconds at which the tool will send "please interrupt the boot |
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187 process" beacons out the serial port, hoping to catch the Calypso |
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188 internal boot ROM. The default is 13 ms. |
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189 |
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190 -n |
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191 |
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192 This option does anything only when loadtools have been compiled to run |
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193 on GTA0x AP (see the corresponding section below). If you've compiled |
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194 loadtools with the -DGTA0x_AP_BUILD option, it has an effect of making |
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195 each tool automatically toggle the modem power control upon startup, |
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196 removing the need for manual sequencing of the Calypso boot process. |
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197 This -n option suppresses that action, making the AP build behave like |
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198 the standard build in this regard. |
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199 |
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200 -r baud (fc-loadtool) |
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201 |
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202 This optoin is specific to fc-loadtool. It causes the tool to skip its |
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203 normal steps of feeding loadagent and possibly compalstage to the target |
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204 via special serial protocols, and instead assume that the target is |
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205 already running loadagent, communicating at the specified baud rate. |
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206 In other words, reattach to an already running loadagent. Use this |
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207 option if your fc-loadtool session has been terminated ungracefully and |
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208 you would like to reattach and resume, rather than forcibly reset the |
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209 target by yanking and reinserting the battery and restart from the |
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210 beginning. |
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211 |
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212 -r baud (fc-xram) |
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213 |
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214 This option is specific to fc-xram. It selects the serial line baud |
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215 rate which should be set just before the loaded XRAM image is jumped |
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216 to; the default is 115200 baud. |
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217 |
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218 fc-xram 2nd program invokation |
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219 ============================== |
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220 |
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221 The fc-xram utility can take two possible actions after it has loaded the |
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222 specified S-record image into XRAM: |
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223 |
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224 * The default action, in the absence of additional command line arguments, is |
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225 to drop into a serial tty pass-thru mode, just like fc-iram. |
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226 |
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227 * The alternative action is to invoke a 2nd program and pass the serial |
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228 communication channel to it. This 2nd program invokation facility is intended |
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229 primarily for passing the serial communication channel to rvinterf or rvtdump |
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230 from the FreeCalypso software suite, not for launching any arbitrary 3rd-party |
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231 programs from fc-xram. |
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232 |
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233 The intended usage scenario is that one builds a version of the FreeCalypso GSM |
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234 firmware (or some subset thereof, such as an "in vivo" FFS editing agent) in the |
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235 ramImage configuration, fc-xram is used to load that ramImage into the target |
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236 device, and then the serial communication channel (RVTMUX) is immediately taken |
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237 over by rvinterf or rvtdump. |
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238 |
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239 Openmoko GTA0x |
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240 ============== |
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241 |
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242 All of the above instructions assume that you are running these loadtools on a |
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243 general-purpose host system such as a GNU/Linux PC or laptop, and will |
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244 potentially use them to operate on multiple Calypso targets of different kinds. |
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245 If instead you are building loadtools to run on the application processor of a |
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246 smartphone such as Openmoko GTA0x, then it makes no sense for that special build |
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247 of loadtools to support any target other than the specific modem in that |
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248 smartphone. Loadtools can be built with compalstage support excluded and with |
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249 GTA0x-specific modem power control included instead. This build will still |
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250 include a bunch of functions of no relevance to GTA0x, but oh well.. |
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251 |
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252 To build loadtools for the GTA0x AP, you'll need to make the following |
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253 modifications to the Makefile: |
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254 |
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255 * Change the CC= line to point to the appropriate cross-compiler (which you'll |
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256 need to provide yourself); |
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257 |
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258 * Change the CFLAGS= line: add the right options to target the ARM920T core in |
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259 the GTA0x AP (e.g., -march=armv4t -mtune=arm920t), and add -DGTA0x_AP_BUILD |
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260 to enable some code that makes sense only when running on the GTA0x AP. |
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261 |
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262 * Change EXTRA_OBJ= from listing compalload.o to listing compaldummy.o and |
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263 gtapower.o instead. |
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264 |
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265 See gta-ap-build.sed for an example. |