OK, I can confirm, that I was able to solve MC7455 being in low power mode by BIOS tweak:
1. reload BIOS default, save boot 2. disable WWAN card in Security I/O ports, save BIOS, boot 3. enable WWAN card in Security I/O ports, save BIOS, boot I did removed tape on PIN20 and I did revert PCOFFEN=0, but even so after hack the card stays 'enabled' AT!PCINFO? State: Online LPM voters - Temp:0, Volt:0, User:0, W_DISABLE:0, IMSWITCH:0, BIOS:0, LWM2M:0, 0 LPM persistence - None OK AT!ENTERCND="A710" OK AT!PCOFFEN=0 OK AT!PCOFFEN? 0 OK AT!PCINFO? State: Online LPM voters - Temp:0, Volt:0, User:0, W_DISABLE:0, IMSWITCH:0, BIOS:0, LWM2M:0, 0 LPM persistence - none On Sat, Jun 10, 2017 at 12:45 AM, Dominik Strnad <[email protected]> wrote: > Hello Bjorn, thank you for reply > > On Fri, Jun 9, 2017 at 10:28 PM, Bjørn Mork <[email protected]> wrote: > >> Dan Williams <[email protected]> writes: >> >> > On Fri, 2017-06-09 at 01:25 +0200, Dominik Strnad wrote: >> >> Hello Bjorn, >> >> >> >> thank you. I meanwhile succeeded to get car into online mode by >> >> isolating >> >> pin20 on minPCIe card. But I at least confirm, that after using >> >> ENTERCND >> >> the PCOFFEN do not report error anymore (but the card was already not >> >> in >> >> disable state because of pin isolation. But I have a question - what >> >> is >> >> better? To use your command (probably as part of some udev rule?) or >> >> keep >> >> that pin isolated? Thank you. >> > >> > Ideally figure out why BIOS isn't letting the card be enabled :) >> >> I still think this is a BIOS flag which needs to be set or cleared, but >> I don't know the exact magic spell. Looking at the thinkpad_acpi driver >> now, I get a distinct deja vu feeling... If I only had taken some notes >> :-( >> > > I maybe remembered something.... I think the key was to: > > 1. reload BIOS default, save boot > 2. disable WWAN or WIMAX? card in Security I/O ports, save BIOS, boot > 3. enable WWAN or WIMAX? card in Security I/O ports, save BIOS, boot > > >> I wonder if I simply might have temporarily disabled the "HWPRESENT" >> test in the driver, and let the default wan_shutdown() just update the >> state? In any case, I do believe the solution is hidden somewhere here: >> >> >> >> static void wan_shutdown(void) >> { >> /* Order firmware to save current state to NVRAM */ >> if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd", >> TP_ACPI_WGSV_SAVE_STATE)) >> pr_notice("failed to save WWAN state to NVRAM\n"); >> else >> vdbg_printk(TPACPI_DBG_RFKILL, >> "WWAN state saved to NVRAM\n"); >> } >> >> static void wan_exit(void) >> { >> sysfs_remove_group(&tpacpi_pdev->dev.kobj, >> &wan_attr_group); >> >> tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID); >> >> wan_shutdown(); >> } >> >> static int __init wan_init(struct ibm_init_struct *iibm) >> { >> int res; >> int status = 0; >> >> vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, >> "initializing wan subdriver\n"); >> >> TPACPI_ACPIHANDLE_INIT(hkey); >> >> tp_features.wan = hkey_handle && >> acpi_evalf(hkey_handle, &status, "GWAN", "qd"); >> >> vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, >> "wan is %s, status 0x%02x\n", >> str_supported(tp_features.wan), >> status); >> >> #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES >> if (dbg_wwanemul) { >> tp_features.wan = 1; >> pr_info("wwan switch emulation enabled\n"); >> } else >> #endif >> if (tp_features.wan && >> !(status & TP_ACPI_WANCARD_HWPRESENT)) { >> /* no wan hardware present in system */ >> tp_features.wan = 0; >> dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, >> "wan hardware not installed\n"); >> } >> >> if (!tp_features.wan) >> return 1; >> >> .. >> >> >> > But failing that, either PCOFFEN or the taping of pin20 are probably >> > fine. PCOFFEN is likely the better solution, though that may be reset >> > on firmware updates. >> >> I don't think it will be reset. NVRAM settings are usually kept, unless >> the firmware upgrade includes a specific setting. And they normally >> don't touch PCOFFEN. >> > > So it seems that time comes to remove isolation on PIN20 and test again: > > - BIOS hack (Should I revert somehow PCOFFEN to previous value to be able > to see if bios enabling card now? Which value?) > - PCOFFEN only > > Dominik > > > >> >> >> Bjørn >> >> >
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