cvs commit: src/sys/pci amdpm.c

[Ruslan Ermilov]

On Fri, Dec 16, 2005 at 10:39:56AM -0500, John Baldwin wrote:
> On Friday 16 December 2005 10:03 am, Ruslan Ermilov wrote:
> > ru          2005-12-16 15:03:16 UTC
> >
> >   FreeBSD src repository
> >
> >   Modified files:
> >     sys/pci              amdpm.c
> >   Log:
> >   Fix PCI ID of the AMD-8111 System Management controller so it matches
> >   SMBus 1.0 and not SMBus 2.0.
> >
> >   AMD-8111 hub (datasheet is publically available) implements both SMBus
> >   2.0 (a separate PCI device) and SMBus 1.0 (a subfunction of the System
> >   Management Controller device with the base I/O address is accessible
> >   through the CSR 0x58).  This driver only supports AMD-756 SMBus 1.0
> >   compatible devices.
> >
> >   With the patched sysutils/xmbmon port (to also fix PCI ID and to enable
> >   smb(4) support), I now get:
> >
> >   pciconf:
> >   none0 at pci0:7:2: class=0x0c0500 card=0x746a1022 chip=0x746a1022 rev=0x02
> > hdr=0x00 vendor   = 'Advanced Micro Devices (AMD)'
> >       device   = 'AMD-8111 SMBus 2.0 Controller'
> >       class    = serial bus
> >       subclass = SMBus
> >   amdpm0 at pci0:7:3:        class=0x068000 card=0x746b1022 chip=0x746b1022
> > rev=0x05 hdr=0x00 vendor   = 'Advanced Micro Devices (AMD)'
> >       device   = 'AMD-8111 ACPI System Management Controller'
> >       class    = bridge
> >
> >   dmesg:
> >   amdpm0: <AMD 756/766/768/8111 Power Management Controller> port
> > 0x10e0-0x10ff at device 7.3 on pci0 smbus0: <System Management Bus> on
> > amdpm0
> >
> >   # mbmon -A -d
> >   Summary of Detection:
> >    * SMB monitor(s)[ioctl:AMD8111]:
> >     ** Winbond Chip W83627HF/THF/THF-A found at slave address: 0x50.
> >     ** Analog Dev. Chip ADM1027 found at slave address: 0x5C.
> >    * ISA monitor(s):
> >     ** Winbond Chip W83627HF/THF/THF-A found.
> >
> >   I think the confusion comes from the fact that nobody really tried
> >   SMBus with xmbmon :-), since sysutils/xmbmon port doesn't come with
> >   SMBus support enabled, neither in FreeBSD 4, nor in later versions,
> >   so mbmon(1) was just showing the values from the Winbond sensors
> >   accessible through the ISA I/O method (mbmon -I), for me anyway.
> >
> >   On my test machine, the amdpm(4) didn't even attach due to I/O port
> >   allocation failure (who knows what the hell it read from CSR 0x58
> >   of the SMBus 2.0 device :-), which isn't in the CSR space).
> >
> >   I've also checked that lm_sensors.org uses correct PCI ID for SMBus
> >   1.0 of AMD-8111:
> >
> >   i2c-amd756.c:   {PCI_VENDOR_ID_AMD, 0x746B, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
> > AMD8111 },
> >
> >   This driver is analogous to our amdpm.c which supports SMBus 1.0
> >   AMD-756 and compatible devices, including SMBus 1.0 on AMD-8111.
> >
> >   i2c-amd8111.c:  { 0x1022, 0x746a, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
> >
> >   This driver is analogous to nForce-2/3/4, i2c-nforce2.c, which
> >   supports SMBus 2.0, and which our amdpm.c does NOT support
> >   (SMBus 2.0 uses a different, ACPI-unified, API to talk to SMBus).
> >   At least I know for sure it doesn't work with my nForce3.  :-)
> >
> >   (The xmbmon port will be fixed to correct the PCI ID too and to
> >   enable the smb(4) support.)
> 
> So should the other stuff I just committed be axed then until the ACPI SMBUS 
> stuff is added?
> 
I believe so, but I'd like to hear from Igor or anyone with
nForce2 first.  I suspect that it's a "fake" support now for
nForce2/3/4, but my observations are based on reading the
Igor's explanations and lm_sensors sources, so I'd like to
see the output from "mbmon -A -d" and then "mbmon -S 8" from
those with nForce2 who believe this patch is valuable, to be
sure.  (I don't personally have any nForce2 based machines
around here to check it.)

P.S.  It may equally be that nForce2/3/4 implement a compatible
SMBus 1.0 interface, it's just impossible to obtain the specs.

P.P.S.  I'm 5 minutes from committing a patch to xmbmon port
that fixes SMBus support (well, really compiles it in).


Cheers,
-- 
Ruslan Ermilov
ru at FreeBSD.org
FreeBSD committer
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