Hi, On 2021-08-12 7:17 a.m., Denis 'GNUtoo' Carikli wrote: > On Wed, 11 Aug 2021 22:20:03 -0700 > Jonathan Bakker <xc-rac...@live.ca> wrote: > >> Hi, > Hi, > > Thanks a lot for all the infos. > >> Which of the first-gen Galaxy S modems are you referring to? Based on >> the mention of SGH-T959P, I think you're talking about the STE M5730, >> and not the XMM6160 found in the way more common i9000 (the SGH-T959P >> is a Canadian variant supporting HSPA+, and is very similar to the >> American SGH-T959V). > Basically I'm interested to understand if there is code that works with > some version of libsamsung-ipc and a port of the modem drivers on top > of upstream Linux. >
Ah, got it. Yes, I have had modem drivers based on upstream linux working - in addition to Simon Shield's commits, I had to do a few corrections, see the commit logs to sipc at [1]. There were previously some issues with large packets and sending packets I think was totally broken. Note it may be different for the i9300. >> In any event, yes, I have been able to power up the M5730 modems with >> the modified libsamsung-ipc and mainline-based kernels. I've had two >> separate mainline-based drivers that worked on it, one based on the >> crespo driver [1] and another based on the crespo driver and the sipc >> interface created for the i9300. I've also had an Android version >> working at some point, both with the stock driver as well as a >> crespo-based driver. > Did you manage to register to the network or call numbers with any of > these drivers? > > In my case I used the following setup: > - A Galaxy SIII (GT-I9300) > - GNU/Linux (Parabola) > - u-boot from Simon Shields or the stock bootloader (I tried both) > - Rebased modem patches on top of upstream Linux[1] > - Modem patches on top of libsamsung-ipc upstream[2] > > To test I use the ipc-modem tool to make it call my number like that: > # ipc-modem --debug --call 06xxxxxxxx start > > And the modem boots fine and I can send and receive (some) IPC messages > but then the modem doesn't register to the network and it doesn't call > my number (06xxxxxxxx). > > After disabling libsamsung-ril on Replicant 6, the same tool results in > my number being called in Replicant 6, and I recall having it tested it > with the exact same libsamsung-ipc revision. > > There are still many differences between the two setups: > - The kernel is not the same > - The "device" driver in libsamsung-ipc is different > - The OS isn't the same. > - And in most of my tests the bootloader wasn't the same but I've also > tested with the same bootloader on the exact same device. > > I've also observed strange behavior with the GPIOs that are between the > modem and the SOC: for instance I can't change the value of > the SUSPEND_REQ GPIO, but it changes by itself during the modem > boostrap, and it's also different between Replicant 6 and Parabola (on > the same device, with the same bootloader). > > I also didn't manage yet to use the same OS / distribution for the > tests with the downstream and upstream kernels. >>> Note that it requires the RFS loop to be setup and functional with >> the various reading messages to work. > The test tool that I use doesn't handle RFS messages at all! > > I assumed that because it worked with the ipc-modem test tool on > Replicant 6, it should also work on top of an upstream kernel. > > I then probably need to add RFS support to the test tool in order to > keep the test setup simple. > > Do you know if the RFS messages need to be processed somehow? Or is it > supposed to also work if the messages are discarded in your case? In my case, they are absolutely required with the M5730 - the EFS is loaded via them :) I have working implementation of ipc-modem with RFS commands and auto-answering calls that I have used at [2]. This was working both on mainline linux as well as in Android. Jonathan [1] https://github.com/xc-racer99/linux/commits/modem-v2 [2] https://github.com/xc-racer99/libsamsung-ipc/commits/common-rfs-v2 _______________________________________________ Replicant mailing list Replicant@osuosl.org https://lists.osuosl.org/mailman/listinfo/replicant
