Change in coreboot[master]: ec/lenovo/h8/smm: Support USB always on AC only

[Patrick Rudolph (Code Review)]

Patrick Rudolph has uploaded this change for review. ( https://review.coreboot.org/20450

Change subject: ec/lenovo/h8/smm: Support USB always on AC only
......................................................................

ec/lenovo/h8/smm: Support USB always on AC only

Add support for UAO AC only mode.
Needs tests on all platforms.

Change-Id: Ib52aab427ff687b00129024cde65b78060d21e32
Signed-off-by: Patrick Rudolph 
---
M src/ec/lenovo/h8/smm.c
M src/mainboard/lenovo/x201/cmos.layout
M src/mainboard/lenovo/x220/cmos.layout
3 files changed, 17 insertions(+), 3 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/50/20450/1

diff --git a/src/ec/lenovo/h8/smm.c b/src/ec/lenovo/h8/smm.c
index 31009a6..6005c31 100644
--- a/src/ec/lenovo/h8/smm.c
+++ b/src/ec/lenovo/h8/smm.c
@@ -18,18 +18,30 @@

#include "h8.h"

+enum usb_always_on {
+	UAO_OFF = 0,
+	UAO_AC_AND_BATTERY,
+	UAO_AC_ONLY
+};
+
 void h8_usb_always_on(void)
 {
-	u8 val;
+	enum usb_always_on val;
    u8 reg;

if (get_option(&val, "usb_always_on") != CB_SUCCESS)
-		val = 0;
+		val = UAO_OFF;

-	if (val) {
+	if (val == UAO_AC_AND_BATTERY) {
    	reg = ec_read(H8_USB_ALWAYS_ON);
    	reg &= ~H8_USB_ALWAYS_ON_AC_ONLY;
    	reg |= H8_USB_ALWAYS_ON_ENABLE;
    	ec_write(H8_USB_ALWAYS_ON, reg);
+	} else if (val == UAO_AC_ONLY) {
+		reg = ec_read(H8_USB_ALWAYS_ON);
+		reg |= H8_USB_ALWAYS_ON_AC_ONLY;
+		reg |= H8_USB_ALWAYS_ON_ENABLE;
+		ec_write(H8_USB_ALWAYS_ON, reg);
+		ec_set_bit(0x2, 3);
    }
 }
diff --git a/src/mainboard/lenovo/x201/cmos.layout b/src/mainboard/lenovo/x201/cmos.layout
index 7270232..8b40585 100644
--- a/src/mainboard/lenovo/x201/cmos.layout
+++ b/src/mainboard/lenovo/x201/cmos.layout
@@ -125,6 +125,7 @@
 10    6     160M
 11    0     Disable
 11    1     AC and battery
+11    2     AC only

# -----------------------------------------------------------------
 checksums
diff --git a/src/mainboard/lenovo/x220/cmos.layout b/src/mainboard/lenovo/x220/cmos.layout
index 77979b3..93e7ba9 100644
--- a/src/mainboard/lenovo/x220/cmos.layout
+++ b/src/mainboard/lenovo/x220/cmos.layout
@@ -136,6 +136,7 @@
 11    6	    224M
 12    0     Disable
 12    1     AC and battery
+12    2     AC only

# -----------------------------------------------------------------
 checksums