FreeCalypso > hg > fc-magnetite
annotate doc/Pirelli-Howto @ 691:b7b809c62586
doc/Config-vars: updated descriptions of DSAMPLE_FULL_COLOR and UI_CONFIG
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Thu, 15 Oct 2020 17:42:12 +0000 |
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1 Running FreeCalypso Magnetite firmware on the Pirelli DP-L10 |
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2 ============================================================ |
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3 |
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4 The Pirelli DP-L10 is a neat target for playing with FreeCalypso for a few |
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5 reasons: |
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6 |
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7 1. It has a USB port connected to one of Calypso's UARTs through a built-in |
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8 CP2102 USB-serial adapter, eliminating the need for headset jack serial |
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9 cables. |
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10 |
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11 2. The huge RAM on this phone (8 MiB) makes it possible to run experimental GSM |
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12 firmware images entirely in RAM without flashing - and we have successfully |
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13 implemented this capability in FC Magnetite similarly to Citrine. |
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14 |
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15 3. Running an experimental firmware image on the Pirelli requires nothing more |
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16 than a laptop, a phone and a USB cable, and can therefore be done under |
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17 less-than-ideal conditions while away from your proper FreeCalypso hardware |
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18 lab with an FCDEV3B setup. |
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19 |
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20 There is, however, one difference between our Citrine and Magnetite firmwares |
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21 when it comes to running on the Pirelli without flashing: Citrine uses a |
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22 RAM-based fake FFS, whereas Magnetite always requires a real FFS in flash, even |
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23 when the firmware code image itself is entirely RAM-based. However, just like |
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24 on the C139, we do NOT use the same FFS which is used by Pirelli's official |
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25 firmwares - the latter contains nothing of use to our fw, hence it is best for |
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26 us to use our own separate FreeCalypso Magnetite FFS. |
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27 |
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28 The flash location that's been chosen for Magnetite FFS on the Pirelli is |
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29 0x02480000 through 0x025FFFFF, i.e., offsets 0x480000 through 0x5FFFFF in the |
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30 second flash bank. Pirelli's official firmwares use this flash area as |
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31 temporary storage during OTA (over-the-air, probably WLAN in this case) fw |
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32 reloads and leave it untouched at all other times, therefore as long as you are |
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33 not doing firmware reloads over WLAN while in the "official mode", you can use |
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34 your Pirelli phone for FreeCalypso experiments via fc-xram and go back to the |
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35 regular fw in between, and the Magnetite FFS in the flash will be preserved |
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36 from one fc-xram session to the next, not disturbed by Pirelli's fw. |
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37 |
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38 Compiling |
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39 ========= |
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40 |
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41 We don't have a FreeCalypso firmware offering for the Pirelli that makes it |
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42 work as an untethered phone, and probably never will: there is too much |
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43 undocumented peripheral hardware in this phone. Instead a Pirelli phone |
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44 running our FC Magnetite firmware will act as voice pseudo-modem: the LCD will |
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45 stay dark and the buttons will do nothing, and you will need to control the GSM |
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46 MS from your PC or other host system via AT commands. |
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47 |
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48 As explained in the Voice-pseudo-modem article, the two most sensible firmware |
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49 configurations (in the ./configure.sh sense) for VPM targets are hybrid-vpm and |
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50 l1reconst-chg. Because of the huge RAM, you can also compile and run our more |
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51 traditional configurations intended for proper modems like FCDEV3B (l1reconst, |
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52 hybrid or hybrid-osl), but all data services functionality of those fw configs |
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53 (CSD and GPRS) will remain inaccessible (dead weight) when running on the |
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54 Pirelli. Furthermore, our FreeCalypso battery charging code is only included |
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55 in the special hybrid-vpm and l1reconst-chg configs, not in the traditional |
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56 ones. |
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57 |
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58 Run './configure.sh pirelli l1reconst-chg' or |
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59 './configure.sh pirelli hybrid-vpm' depending on which configuration you would |
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60 like to play with, then run 'make ram' in the build directory created by the |
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61 configure script - see the Compiling write-up for more details. |
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62 |
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63 Running on the target |
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64 ===================== |
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65 |
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66 1. Connect a USB cable from your GNU/Linux PC/laptop to the phone. If the |
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67 phone was off but the battery is present, it will go through a charger-plug |
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68 power-on event; if the flash contains Pirelli's original fw, it will boot in |
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69 the charging mode. If the battery is not present, the Calypso won't power |
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70 on (it needs VBAT and can't run on VCHG power instead), but the /dev/ttyUSBx |
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71 device will still show up, as the CP2102 USB-serial chip inside the phone is |
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72 powered strictly from the USB side. |
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73 |
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74 2. Run a command like the following: |
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75 |
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76 fc-xram -h pirelli /dev/ttyUSB0 ramimage.srec rvinterf |
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77 |
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78 Adjust the paths to your /dev/ttyUSBx device and your ramimage.srec as |
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79 appropriate, and add rvinterf logging or other options as desired. |
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80 Specifying rvinterf on the fc-xram command line directs fc-xram to exec |
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81 rvinterf and pass the serial channel to it immediately as soon as the code |
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82 image has been loaded into target RAM and jumped to; this direct passing of |
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83 the serial channel from fc-xram to rvinterf is appropriate because the |
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84 loaded fw will immediately start emitting binary trace packets in TI's RVTMUX |
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85 format. |
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86 |
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87 3. Induce the phone to execute its Calypso boot path: if the battery was |
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88 removed, insert it now; if Pirelli's regular fw is running, execute its |
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89 power-off sequence. |
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90 |
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91 Once the Calypso chip in the Pirelli phone executes its boot path with fc-xram |
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92 running, the boot path will be diverted and our experimental firmware will be |
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93 loaded into target device RAM and jumped to. Our fw will now run, and the |
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94 rvinterf process on the host will maintain communication with it. |
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95 |
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96 FFS initialization |
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97 ================== |
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98 |
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99 When our Magnetite firmware boots, it will examine the state of the flash |
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100 sectors in the area we have allocated for our aftermarket FFS. If this flash |
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101 area is completely blank the first time Magnetite boots, as it should be if you |
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102 have a "virgin" Pirelli phone, the FFS code in our fw will automatically perform |
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103 what TI called the "preformat" operation: write undifferentiated FFS block |
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104 headers (0xBF in the flags byte) into each flash sector. However, it won't |
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105 automatically perform the "format" operation - instead you'll need to run |
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106 fc-fsio to do the format and to populate this FFS with some necessary content. |
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107 If you are not sure of the state of the Magnetite FFS flash area on your |
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108 Pirelli, you can also run fc-fsio to examine it - so run fc-fsio either way. |
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109 Run fc-fsio WITHOUT -p: let it connect to the rvinterf process you should |
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110 already have running from fc-xram. |
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111 |
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112 [NOTE: you need to be running FreeCalypso host tools from the fc-host-tools-r5 |
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113 release or later; earlier versions of fc-fsio won't work as described.] |
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114 |
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115 Once you are in fc-fsio, check the status of your FFS like this: |
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116 |
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117 fsio> ls -l / |
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118 |
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119 If the FFS is already formatted, you will get a listing of the root directory; |
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120 if it is not formatted, you'll get an error like this: |
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121 |
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122 opendir: FFS error 4 (EFFS_NOFORMAT: ffs not formatted) |
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123 |
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124 To format and initialize your Pirelli Magnetite FFS, issue the following |
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125 commands: |
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126 |
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127 fsio> format / |
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128 fsio> pirelli-magnetite-init |
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129 |
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130 If you already have a formatted FFS from before, it is safe to rerun the |
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131 pirelli-magnetite-init command, but not format. The format command will *not* |
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132 work on an already formatted FFS; if you have a messed-up FFS and you would |
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133 like to restart from a clean slate, erase the Magnetite FFS sectors with |
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134 fc-loadtool: |
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135 |
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136 loadtool> flash2 erase 480000 180000 |
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137 |
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138 Exercising the GSM functionality |
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139 ================================ |
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140 |
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141 Once your FFS is good, open another terminal window on your driving PC/laptop |
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142 and run fc-shell. This program will connect to the already running rvinterf |
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143 process via a local socket, and it will enable you to send various commands to |
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144 the running fw on the target, the most important ones being standard AT |
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145 commands. Send the following sequence of AT commands to bring up GSM |
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146 functionality: |
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147 |
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148 AT+CMEE=2 -- enable verbose error responses |
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149 AT+CFUN=1 -- enable radio and SIM interfaces |
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150 AT+COPS=0 -- register to the default GSM network |
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151 |
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152 When you are done playing with our experimental fw, you can either yank the |
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153 battery and kill the host side rvinterf and fc-shell processes, or you can |
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154 issue a 'tgtreset' command at the fc-shell prompt. The latter will cause the |
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155 target to reset and boot back into its regular firmware. |
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156 |
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157 A recent addition to our VPM firmware configuration is automatic power-off: if |
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158 you simply disconnect USB while our FC Magnetite VPM fw is running, without |
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159 issuing any tgtreset or poweroff commands and without yanking the battery, our |
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160 firmware should detect the disconnection of USB and power off the phone within |
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161 10 s. |