b44 suspend/resume (Re: PCI not restored correctly after suspend to ram)

[Len Brown <len.brown-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>]

On Thu, 2004-03-18 at 03:35, Stefan Dösinger wrote:
> Hello list,
> I have the following problems with suspend to ram on my Acer Travelmate 803
> (Centrino) notebook:
> With the patch for radeon_driver.c(Xfree v. 4.4) I can suspend and resume my 
> notebook. After resume, the settings of most pci devices are not restored 
> correctly and the devices do not work. See the attached lspci_before_suspend 
> and lspci_after_suspend files for details.
> Devices not working are:
> *Soundcard(00:1f.5)
> *All devices on bus 02
> *The modem, but there's only a non-GPL driver available.
> 
> I can get most devices devies to work by setting the pci registers with setpci 
> after resume. I use the attached fixpci.sh script to do so. I can get my 
> soundcard, the ethernet card(02:02.0) ...

02:02.0 Ethernet controller: Broadcom Corporation BCM4401 100Base-T (rev
01)

#broadcom ethernet controller
DEV=02:02.0
echo "Configuring $DEV"
$SETPCI -s $DEV  04.w=0x0106
$SETPCI -s $DEV  08.w=0x0810
$SETPCI -s $DEV  0c.w=0x4000
$SETPCI -s $DEV  10.w=0x4000
$SETPCI -s $DEV  12.w=0xd020

I think this is the b44. Looking at b44_suspend/b44_resume, I don't see
any calls to pci_save_state()/pci_restore_state() that I would expect,
so it comes back after resume with bus mastering disabled etc.

-Len
-----------
lspci_before_suspend:

02:02.0 Ethernet controller: Broadcom Corporation BCM4401 100Base-T (rev
01)
        Subsystem: Acer Incorporated [ALI]: Unknown device 001f
        Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR+ FastB2B-
        Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort+
<TAbort- <MAbort- >SERR- <PERR-
        Latency: 64
        Interrupt: pin A routed to IRQ 5
        Region 0: Memory at d0204000 (32-bit, non-prefetchable)
[size=8K]
        Capabilities: [40] Power Management version 2
                Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=375mA
PME(D0+,D1+,D2+,D3hot+,D3cold+)
                Status: D0 PME-Enable- DSel=0 DScale=2 PME-
00: e4 14 01 44 06 01 10 08 01 00 00 02 00 40 00 00
10: 00 40 20 d0 00 00 00 00 00 00 00 00 00 00 00 00
20: 00 00 00 00 00 00 00 00 00 00 00 00 25 10 1f 00
30: 00 00 00 00 40 00 00 00 00 00 00 00 05 01 00 00

------------
lspci_after_suspend
02:02.0 Ethernet controller: Broadcom Corporation BCM4401 100Base-T (rev
01)
        Subsystem: Acer Incorporated [ALI]: Unknown device 001f
        Control: I/O- Mem- BusMaster- SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR- FastB2B-
        Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
        Interrupt: pin A routed to IRQ 5
        Region 0: [virtual] Memory at d0204000 (32-bit,
non-prefetchable) [disabled] [size=8K]
        Capabilities: [40] Power Management version 2
                Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=375mA
PME(D0+,D1+,D2+,D3hot+,D3cold+)
                Status: D0 PME-Enable- DSel=0 DScale=2 PME-
00: e4 14 01 44 00 00 10 00 01 00 00 02 00 00 00 00
10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
20: 00 00 00 00 00 00 00 00 00 00 00 00 25 10 1f 00
30: 00 00 00 00 40 00 00 00 00 00 00 00 00 01 00 00




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