Hello Marcel and Suraj, -----Message d'origine----- De : linux-bluetooth-owner@xxxxxxxxxxxxxxx [mailto:linux-bluetooth-owner@xxxxxxxxxxxxxxx] De la part de Suraj Sumangala Envoyé : mercredi 15 septembre 2010 08:14 À : Marcel Holtmann Cc : Suraj Sumangala; linux-bluetooth@xxxxxxxxxxxxxxx; Jothikumar Mothilal Objet : Re: [RFC] BlueZ D-Bus Sim Access Profile Server API description >Hi Marcel, > >On 9/15/2010 9:14 AM, Marcel Holtmann wrote: >> Hi Suraj, >> >>> >>> I would really appreciate if you can give me any idea about working >>> around the above mentioned issues. >> >> if we talk about the SAP server role found in a mobile phone, then that >> support clearly needs to interact with the telephony stack. Since when >> SAP is active the telephony stack needs to be suspended and all SIM >> transaction being forwarded. >> >> Currently I would be thinking that the SAP implementation should be done >> inside oFono actually. Since then you have direct access to the >> hardware. The D-Bus approach just doesn't sound correct to me. I could >> be of course wrong, but I can't wrap my mind around on how you can make >> this work. >> >> Even with file descriptor passing this doesn't look like the right >> approach. If we need a hardware abstraction than we either use oFono or >> we have to create some SAP hardware access abstraction. > >The advantage I thought d-bus has would be the generic interface it >could provide. But, if we have a system with direct access to the Sim >access hardware, D-bus could possibly become a bottleneck. > >I would really appreciate if others who have worked with Sim Access and >OFono can give their comments. > >Also, please share some information on regarding the SIM reader >implementation in linux based systems. > >> >> The SAP client role found a carkit is obviously a different story. >> >> Regards >> >> Marcel >> >> >Regards >Suraj I agree with Marcel, because in standard Mobile phone implementation, the SIM card is directly connected to the Modem. To access the SIM card, AT command (or proprietary commands) are needed, oFono implements both of them to access SIM card in Modem side, but in my understanding there is no possibilities to disconnect modem (in oFono) due to SIM SAP. In the case where SIM card is connected to the Application processor (Linux side), it's missing the SIM stack (APDU server...). I don't find any SIM implementation in Linux, may be we have to specify it. Best Regards, Nicolas. -- To unsubscribe from this list: send the line "unsubscribe linux-bluetooth" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
