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PirelliDPL10 » History » Version 10

steve-m, 02/19/2016 10:48 PM
add debugging connector pinout

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= Pirelli DP-L10 =
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The Pirelli DP-L10 is a tripleband GSM/Wifi VoIP dualmode phone, which was developed by Pirelli Broadband Solutions and manufactured by Foxconn.
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It was branded and sold by quite a few operators:
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 * Pirelli DP-L10
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 * Arcor Twintel DP-L10
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 * Telekom TC-300
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 * sipgate Pirelli Discus !DualPhone DP-L10
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 * free.fr Black
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 * Cubic Mobile DP-L10
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 * Tovo t450g
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 * Eurotef-M
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The phones are still available as new at various places like eBay, Pollin or rebelsimcard.com.
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For more information on the original firmware see the [http://wiki.ip-phone-forum.de/telefone:t-one_tc300:start ip-phone-forum wiki] (german).
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== Hardware ==
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 * CPU/DBB: TI Calypso (D751992AZHH)
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 * ABB: TI Iota (TWL3014)
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 * GSM Transceiver: TI Rita (TRF6151)
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 * PA: SKY77328-13
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 * Flash/SRAM: Spansion S71PL129NC0 128MBit/64MBit
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 * Wifi: Marvell 88W8385 802.11 MAC
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   * Marvell 88W8015 802.11b/g transceiver
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 * Winbond W56940 ringtone chip
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 * Sunplus SPCA552E multimedia controller
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 * LSI-65194A1 ASIC (seems to be a DSP for VoIP en-/decoding)
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 * Silabs CP2102 USB UART (connected to UART_IRDA of the Calypso)
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=== PCB ===
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The pcb is labelled with "T60N925", and the Foxconn internal project name seems to be "T60N925.00".[[BR]]
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There are no schematics of this phone, however, steve-m has grinded down one of those boards, see the pictures of all layers [http://www.steve-m.de/pictures/pirelli_dpl10/ here].
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[[Image(dpl10_front_small.jpg)]][[BR]]
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[http://www.steve-m.de/pictures/dpl10_front.jpg large version]
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[[Image(dpl10_back_small.jpg)]][[BR]]
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[http://www.steve-m.de/pictures/dpl10_back.jpg large version][[BR]]
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[http://www.steve-m.de/pictures/rf_frontend.jpg large version of RF part]
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=== RF path ===
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Since this phone is a tripleband design, it uses 3 rx filters, connected to the respective Rita inputs:
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 * Epcos B7820 for GSM900
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 * Epcos B7821 for DCS1800
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 * Epcos B7851 for DCS1900
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Those are connected to an unknown "T 636 / 5475" antenna switch. The pinout of this switch however is identical with the Panasonic EZFL897TB11C.
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The control voltage inputs of the switch are connected to the TSPACT outputs of the Calypso DBB through a Fairchild NC7NZ34 triple-buffer.
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[[Image(dpl10_buffer.jpg)]]
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=== Phone as clock generator ===
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The idea to use an OsmocomBB-driven phone as an accurate clock source, e.g. for the USRP, by synchronizing the clock to a cell of a commercial operator was [http://lists.osmocom.org/pipermail/baseband-devel/2010-April/000322.html discussed] on the mailing list a while back. Since the USRP needs an input clock of 52MHz, but the Compal-phones only expose 13 and 26MHz, an external PLL would be required. The DP-L10 however exposes the MCLK/TSPACT11 pin of the Calypso, which is connected through the triple-buffer to the GSM900 TX/Vc3 input of the antenna switch, and thus easily accessible. When the corresponding bit in the MCU_SW_TRACE register is set, this pin outputs the 52MHz clock being fed to the ARM-core, which is phase-locked to the VCTCXO.  See the blue circuit path in the picture above.
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This is the output captured with a 100MHz scope (and thus limited):[[BR]][[BR]]
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[[Image(mclk_buffered.png)]]
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After synchronizing to a cell with the phone, the frequency error measured by the DSP is in the 0-10Hz range.
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=== USB/Serial converter ===
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A nice feature of this phone is that it already has an integrated Silabs CP210x USB-UART, which is supported by Linux. Even faster, odd baudrates of the Calypso DBB are supported by this chip, including the maximum 812.500 baud.
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Most of the phones seem to use USB vid:pid 0489:e003, which is mainline since Linux 2.6.36 (thus, older kernels need to be patched, the cp210x driver doesn't seem to take the vid/pid via modprobe parameters).
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The DP-L10 has the CalypsoRomloader enabled.
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=== JTAG ===
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All JTAG lines, as well as the second uart (UART_MODEM), go to the unpopulated connector next to the display connector.
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[[Image(dpl10_debug_conn.jpg)]]
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||pin||signal||
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||1||Vcc||
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||2||RX_MODEM||
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||3||TESTRSTz (Iota)||
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||4||TDI||
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||5||TMS||
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||6||TCK||
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||7||TX_MODEM||
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||8||TDO||
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||9||-nc-||
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||10||GND||
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||11||-nc-||
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||12||-nc-||
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== State of support ==
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The code which adds support for the Pirelli DP-L10 can currently be found in the branch steve-m/testing, since it hasn't been merged to master yet.
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However, this is mainly the RFFE-configuration so far, which handles the TSPACT and TSPEN wiring of the Time Serial Port.
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So lots of drivers are missing, like for the Display, correct keypad layout etc. Maybe someone even wants to play with Wifi ;)
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What works:
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 * RX/TX in GSM900 and DCS1800 (PCS1900 should work as well, at least regarding the rffe config)
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 * audio path
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 * SIM-reader
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 * keypad backlight
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