[coreboot] x60 : adding WWAN support
Hello I'm interested in WWAN support, mostly for the GPS features and the cool things you can do with them (like a stratum ntp server). I was told a EM770W doesn't even need a network registration to output NMEA coordinates (http://forum.thinkpads.com/viewtopic.php?f=30t=114426#p735612) so I got one. I looked at patch #4056 which enable WWAN for the EC, but it seems to only part of the job: the ACPI table should also contain a GWAN key for thinkpad-acpi In drivers/platform/x86/thinkpad_acpi.c, you can see different references to WAN: /* ACPI GWAN/SWAN bits */ TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */ TP_ACPI_WANCARD_RADIOSSW= 0x02, /* Wan radio enabled */ TP_ACPI_WANCARD_RESUMECTRL = 0x04, /* Wan state at resume: 0 = disable, 1 = enable */ In wan_get_status : if (!acpi_evalf(hkey_handle, status, GWAN, d)) return -EIO; Apparently, this last part cause the WWAN card not to be handled by thinkpad-acpi, which would otherwise provide rfkill support (usefull to save power, something I'd like to improve) In acpi-3.dsl Scope (\_SB.PCI0.LPC.EC.HKEY, I see entries for both GWAN and SWAN, and other things (WGPS, but what does it means???) I believe similar entries should be added to coreboot asl, but I'm not sure of how integrated they should be. If I understand correctly, following the logic of patch #5242, there should be a conditional statement then some acpigen. If anyone is willing to submit a patch, I would be happy to test it. Charles -- coreboot mailing list: coreboot@coreboot.org http://www.coreboot.org/mailman/listinfo/coreboot
Re: [coreboot] x60 : adding WWAN support
On 01.09.2014 22:19, Charles Devereaux wrote: Hello I'm interested in WWAN support, mostly for the GPS features and the cool things you can do with them (like a stratum ntp server). Most GPS receivers don't have enough precision for any timing. I was told a EM770W doesn't even need a network registration to output NMEA coordinates (http://forum.thinkpads.com/viewtopic.php?f=30t=114426#p735612) so I got one. I looked at patch #4056 which enable WWAN for the EC, but it seems to only part of the job: the ACPI table should also contain a GWAN key for thinkpad-acpi Not necessary. Apparently, this last part cause the WWAN card not to be handled by thinkpad-acpi, which would otherwise provide rfkill support (usefull to save power, something I'd like to improve) Soft rfkill is always available through wwan driver. I believe similar entries should be added to coreboot asl, but I'm not sure of how integrated they should be. If I understand correctly, following the logic of patch #5242, there should be a conditional statement then some acpigen. 5242 is very special because of wacom tablet interaction (serial device naming) See src/ec/lenovo/h8/acpi/ec.asl and included files for the relevant scopes signature.asc Description: OpenPGP digital signature -- coreboot mailing list: coreboot@coreboot.org http://www.coreboot.org/mailman/listinfo/coreboot
Re: [coreboot] x60 : adding WWAN support
Hello On Mon, Sep 1, 2014 at 4:33 PM, Vladimir 'φ-coder/phcoder' Serbinenko phco...@gmail.com wrote: Most GPS receivers don't have enough precision for any timing. Would you recommend a specific one? Apparently, this last part cause the WWAN card not to be handled by thinkpad-acpi, which would otherwise provide rfkill support (usefull to save power, something I'd like to improve) Soft rfkill is always available through wwan driver. What should I do to enable it? At the moment it is not showing in rfkill list, even while I monitor the lack of satellites fix with: echo 'AT^WPDGP' /dev/ttyUSB0 cat /dev/ttyUSB3|grep GPGSV|grep -v 00 *$ rfkill list 0: phy0: Wireless LAN Soft blocked: no Hard blocked: no 1: hci0: Bluetooth Soft blocked: no Hard blocked: no I read http://www.thinkwiki.org/wiki/Ericsson_F3507g_Mobile_Broadband_Module which mentions /sys/devices/platform/thinkpad_acpi/rfkill/rfkill0/state, but I believe it depends on the ACPI entries to show up. Thanks Charles -- coreboot mailing list: coreboot@coreboot.org http://www.coreboot.org/mailman/listinfo/coreboot
