[coreboot-gerrit] [S] Change in coreboot[main]: util/autoport: Improve USB code

[Patrick Rudolph (Code Review)]

Patrick Rudolph has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/78828?usp=email )

Change subject: util/autoport: Improve USB code
......................................................................

util/autoport: Improve USB code

Currently autoport fills in USB current '0' if the detected settings
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 
---
M util/autoport/bd82x6x.go
1 file changed, 13 insertions(+), 3 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/28/78828/1

diff --git a/util/autoport/bd82x6x.go b/util/autoport/bd82x6x.go
index 6ce15a2..85db8be 100644
--- a/util/autoport/bd82x6x.go
+++ b/util/autoport/bd82x6x.go
@@ -309,6 +309,10 @@
    	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 @@
    			}
    		}
    	}
-		fmt.Fprintf(sb, "\t{ %d, %d, %d },\n",
+		current, ok := currentMap[inteltool.RCBA[uint16(0x3500+4*port)]]
+		comment := ""
+		if !ok {
+			comment = "// FIXME: Unknown current"
+		}
+		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")