[XS] Change in coreboot[main]: sb/intel/bd82x6x/early_usb: Print error for invalid USB setting

[Patrick Rudolph (Code Review)]

Patrick Rudolph has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/78827?usp=email )

Change subject: sb/intel/bd82x6x/early_usb: Print error for invalid USB setting
......................................................................

sb/intel/bd82x6x/early_usb: Print error for invalid USB setting

According to BWG the USB current setting 0 should not be used for desktop
boards. As autoport defaults to 0 if the USB current doesn't match one of
the lookup table entries most of the desktop boards in tree have a such
setting. Print an error to alert users of such boards to update the USB
current settings.

Change-Id: If76e9126b4aba8e16c1c91dece725aac12e1a7e9
Signed-off-by: Patrick Rudolph 
---
M src/southbridge/intel/bd82x6x/early_usb.c
1 file changed, 8 insertions(+), 1 deletion(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/27/78827/1

diff --git a/src/southbridge/intel/bd82x6x/early_usb.c b/src/southbridge/intel/bd82x6x/early_usb.c
index 654d44b..27a9c57 100644
--- a/src/southbridge/intel/bd82x6x/early_usb.c
+++ b/src/southbridge/intel/bd82x6x/early_usb.c
@@ -23,8 +23,15 @@
    /* Unlock registers.  */
    write_pmbase16(UPRWC, read_pmbase16(UPRWC) | UPRWC_WR_EN);

-	for (i = 0; i < 14; i++)
+	for (i = 0; i < 14; i++) {
+		if (get_platform_type() == PLATFORM_DESKTOP_SERVER &&
+		    portmap[i].current == 0) {
+			printk(BIOS_ERR, "%s: USB%02d: current setting of 0 is not a valid setting for desktop!\n",
+			       __func__, i);
+		}
+
    	RCBA32(USBIR0 + 4 * i) = currents[portmap[i].current];
+	}
    for (i = 0; i < 10; i++)
    	RCBA32(0x3538 + 4 * i) = 0;