Jonathan A. Kollasch (jakll...@kollasch.net) just uploaded a new patch set to
gerrit, which you can find at http://review.coreboot.org/127
-gerrit
commit df8d54c4372f1e851c413c5903db20284eb57c06
Author: Jonathan A. Kollasch <jakll...@kollasch.net>
Date: Mon Aug 1 15:17:08 2011 -0500
Initialize ACPI to prevent spurious events at OS boot
Change-Id: I7e1138360f18ba857cf533baa8ec1db555aebcde
Signed-off-by: Jonathan A. Kollasch <jakll...@kollasch.net>
---
src/southbridge/nvidia/ck804/lpc.c | 20 ++++++++++++++++++++
1 files changed, 20 insertions(+), 0 deletions(-)
diff --git a/src/southbridge/nvidia/ck804/lpc.c
b/src/southbridge/nvidia/ck804/lpc.c
index d371882..b66a569 100644
--- a/src/southbridge/nvidia/ck804/lpc.c
+++ b/src/southbridge/nvidia/ck804/lpc.c
@@ -28,6 +28,7 @@
#include <device/pci_ops.h>
#include <pc80/mc146818rtc.h>
#include <pc80/isa-dma.h>
+#include <delay.h>
#include <bitops.h>
#include <arch/io.h>
#include <arch/ioapic.h>
@@ -104,6 +105,23 @@ static void rom_dummy_write(device_t dev)
pci_write_config8(dev, 0x6d, new);
}
+static void lpc_acpi_init(u16 base)
+{
+ u16 word;
+
+ printk(BIOS_SPEW, "%s: base = %x \n", __func__, base);
+
+ /* clear sleep, set SCI_EN */
+ word = inw(base + 4);
+ word &= ~(7 << 10);
+ word |= 1;
+ outw(word, base + 4);
+ udelay(100); /* seems to be needed */
+
+ /* clear ACPI PM1 event status */
+ outw(0xffff, base + 0);
+}
+
unsigned pm_base = 0;
static void lpc_init(device_t dev)
@@ -169,6 +187,8 @@ static void lpc_init(device_t dev)
/* Initialize ISA DMA. */
isa_dma_init();
+ lpc_acpi_init(pm_base);
+
rom_dummy_write(dev);
}
--
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