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util/autoport: Improve USB code 

Currently autoport fills in USB current '0' if the detected setting
isn't one of the known settings. This works as 0 is a valid setting
from C point of view, but it's not supported on desktop PCs and on
mobile platform results in the lowest possible USB PHY gain. Thus
this might cause instabilities as the original firmware had stronger
USB drive currents and gain settings.

Add more known USB current fields to the map and generate a FIXME
as comment when the detected current isn't one of the known entries
instead of defaulting to 0.

Change-Id: I48f4d636ce3401ba188f5519b5ff45fccf13f080
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/78828
Reviewed-by: Lean Sheng Tan <sheng.tan@9elements.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
This commit is contained in:
Patrick Rudolph 2023-10-29 19:59:56 +01:00 committed by Lean Sheng Tan
parent c943d6f6a4
commit d323d844f7
1 changed files with 13 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
util/autoport/bd82x6x.go
View File

@ -309,6 +309,10 @@ func (b bd82x6x) Scan(ctx Context, addr PCIDevData) {
0x2000055b: 2,
0x20000f51: 3,
0x2000094a: 4,
0x2000035f: 5,
0x20000f53: 6,
0x20000357: 7,
0x20000353: 8,
}
for port := uint(0); port < 14; port++ {
@ -327,10 +331,16 @@ func (b bd82x6x) Scan(ctx Context, addr PCIDevData) {
}
}
}
fmt.Fprintf(sb, "\t{ %d, %d, %d },\n",
current, ok := currentMap[inteltool.RCBA[uint16(0x3500+4*port)]]
comment := ""
if !ok {
comment = fmt.Sprintf("// FIXME: Unknown current: RCBA(0x%x)=0x%x", 0x3500+4*port, uint16(0x3500+4*port))
}
fmt.Fprintf(sb, "\t{ %d, %d, %d }, %s\n",
((inteltool.RCBA[0x359c]>>port)&1)^1,
currentMap[inteltool.RCBA[uint16(0x3500+4*port)]],
OCPin)
current,
OCPin,
comment)
}
sb.WriteString("};\n")