New patch to review for coreboot: 94a7263 bd82x6x: Use CMOS variable if available for power-on on power failure

[Stefan Reinauer]

Stefan Reinauer ([e-mail]) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/1324

-gerrit

commit 94a72631f7e6882633773210e225f56bef4ff354
Author: Stefan Reinauer 
Date:   Thu Jun 28 12:22:28 2012 -0700

bd82x6x: Use CMOS variable if available for power-on on power failure

We used a hard coded value for some reason. Don't do that, but use CMOS
    instead.

Modelled after http://review.coreboot.org/#/c/443 to get bd82x6x in
    sync.

Change-Id: I36d715310157b9f9074f2a1c80710f85833020b4
    Signed-off-by: Stefan Reinauer 
---
 src/southbridge/intel/bd82x6x/smihandler.c |   14 ++++++++++----
 1 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/src/southbridge/intel/bd82x6x/smihandler.c b/src/southbridge/intel/bd82x6x/smihandler.c
index 29f1a1e..da5b52b 100644
--- a/src/southbridge/intel/bd82x6x/smihandler.c
+++ b/src/southbridge/intel/bd82x6x/smihandler.c
@@ -29,6 +29,7 @@
 #include <device/pci_def.h>
 #include <cpu/x86/smm.h>
 #include <elog.h>
+#include <pc80/mc146818rtc.h>
 #include "pch.h"

#include "nvs.h"
@@ -324,11 +325,16 @@ static void southbridge_smi_sleep(unsigned int node, smm_state_save_area_t *stat
    u8 reg8;
    u32 reg32;
    u8 slp_typ;
-	/* FIXME: the power state on boot should be read from
-	 * CMOS or even better from GNVS. Right now it's hard
-	 * coded at compile time.
-	 */
    u8 s5pwr = CONFIG_MAINBOARD_POWER_ON_AFTER_POWER_FAIL;
+
+	// save and recover RTC port values
+	u8 tmp70, tmp72;
+	tmp70 = inb(0x70);
+	tmp72 = inb(0x72);
+	get_option(&s5pwr, "power_on_after_fail");
+	outb(tmp70, 0x70);
+	outb(tmp72, 0x72);
+
    void (*mainboard_sleep)(u8 slp_typ) = mainboard_smi_sleep;

/* First, disable further SMIs */