Date: Mon, 24 Sep 2001 22:11:49 +0800 From: Mike Bruins <bruins@hal9000.net.au> To: freebsd-questions@freebsd.org, freebsd-hardware@freebsd.org Cc: Mike Bruins <bruins@hal9000.net.au> Subject: health chip driver - vt82c686 - finishing off Message-ID: <20010924221149.A4971@wall.hal9000.net.au>
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Hello,
I have put together most of a device driver for the health
monitoring chip via technologies vt82c686 function 4 (PCI 3057:1106).
All the kernel loadable module, device probe/attach code,
temperature/fan/voltage conversion routines are there.
I can read the device registers for PCI Vendor/Device, chip enable,
class, subclass etc.
Basically what I am not able to do is read the values
hardware offset registers. The call to bus_alloc_resource
fails (returns null) and I can't work out why.
If anyone could please help with the following questions:
1. It looks like bus_alloc_resource() gets resources from it's parent
device driver.
Does the vt82c686 function 4, talk I2C to it's parent to get resources?
If so, do I need a device driver for this parent?
Anyone know it's PCI vendor/device chip code?
2. Perhaps I am going down the wrong path. Ideas, example code
references appreciated. I have looked at many examples of
code, but can't work out what is relevent/required for the 686a/b,
in terms of resources and how it communicates.
3. The bit of my code that is actually failing is below.
Like I said, I am pretty much sure the code to this point
is correct and working as I can print any of the registers
and they have sane values.
I have tried every conbination I can think of for hwm_io_base_reg
and the type of resource I am asking for.
I have read the 686a.pdf file many times, tried all I can think of.
According to the 686a.pdf the data size is 0x80 bytes.
via->mem_rid = hwm_io_base_reg;
via->res_mem = bus_alloc_resource(dev, SYS_RES_MEMORY, &(via->mem_rid),
0ul, ~0ul, 0x80, RF_ACTIVE);
if (!via->res_mem) {
device_printf(dev, "could not map memory\n");
goto bad;
}
via->memt = rman_get_bustag(via->res_mem);
via->memh = rman_get_bushandle(via->res_mem);
Ultimately I need the memt and memh values, so I can make calls like:
val = bus_space_read_1(via->memt, via->memh, regno);
My system:
Motherboard: Gigabyte 6vxd7
CPU : dual 866
OS : 4.3-RELEASE free-bsd
I have altered chip_match() so no driver is loaded at boot time for 0x30571106.
chip0@pci0:0:0: class=0x060000 card=0x00000000 chip=0x06911106 rev=0xc4 hdr=0x00
pcib1@pci0:1:0: class=0x060400 card=0x00000080 chip=0x85981106 rev=0x00 hdr=0x01
isab0@pci0:7:0: class=0x060100 card=0x06861106 chip=0x06861106 rev=0x22 hdr=0x00
uhci0@pci0:7:2: class=0x0c0300 card=0x12340925 chip=0x30381106 rev=0x10 hdr=0x00
uhci1@pci0:7:3: class=0x0c0300 card=0x12340925 chip=0x30381106 rev=0x10 hdr=0x00
none0@pci0:7:4: class=0x0c0500 card=0x00000000 chip=0x30571106 rev=0x30 hdr=0x00
sym0@pci0:9:0: class=0x010000 card=0x00000000 chip=0x00201000 rev=0x01 hdr=0x00
sym1@pci0:9:1: class=0x010000 card=0x00000000 chip=0x00201000 rev=0x01 hdr=0x00
rl0@pci0:10:0: class=0x020000 card=0x0027a0a0 chip=0x813910ec rev=0x10 hdr=0x00
pcm0@pci0:13:0: class=0x040100 card=0x13711274 chip=0x13711274 rev=0x08 hdr=0x00
none1@pci0:14:0: class=0x040100 card=0x20601458 chip=0x13711274 rev=0x07 hdr=0x00
none2@pci1:0:0: class=0x030000 card=0x00000000 chip=0x002c10de rev=0x15 hdr=0x00
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