summaryrefslogtreecommitdiff
path: root/src/southbridge
diff options
context:
space:
mode:
authorPatrick Rudolph <patrick.rudolph@9elements.com>2019-03-24 14:41:45 +0100
committerPatrick Rudolph <siro@das-labor.org>2019-04-13 14:48:25 +0000
commit1ae592b468d7b40d8c7f50d4fcb4dd515aeeaf74 (patch)
treee9beab37497118594492cf8cc5669b0f9efbb782 /src/southbridge
parent6d569163ab680ca436b16c040e6840e969df6c61 (diff)
downloadcoreboot-1ae592b468d7b40d8c7f50d4fcb4dd515aeeaf74.tar.xz
sb/intel/common: Add common detect_s3_resume
Add a common detect_s3_resume function. Will be used by other southbridge code. TODO: Merge with soc/intel/common/*/pmclib Tested on Lenovo T520 (Intel Sandy Bridge) with Change I283a841575430f2f179997db8d2f08fa3978a0bb applied as well. Still boots to OS, no errors visible in dmesg and S3 resume is working. Change-Id: I88023af522afac8164f068b0fbe0eac601aef702 Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/32036 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Diffstat (limited to 'src/southbridge')
-rw-r--r--src/southbridge/intel/common/Kconfig4
-rw-r--r--src/southbridge/intel/common/Makefile.inc2
-rw-r--r--src/southbridge/intel/common/pmclib.c52
-rw-r--r--src/southbridge/intel/common/pmclib.h26
4 files changed, 84 insertions, 0 deletions
diff --git a/src/southbridge/intel/common/Kconfig b/src/southbridge/intel/common/Kconfig
index 6a96277844..0bda06e10a 100644
--- a/src/southbridge/intel/common/Kconfig
+++ b/src/southbridge/intel/common/Kconfig
@@ -6,6 +6,10 @@ config SOUTHBRIDGE_INTEL_COMMON_RESET
bool
select HAVE_CF9_RESET
+config SOUTHBRIDGE_INTEL_COMMON_PMCLIB
+ def_bool n
+ depends on SOUTHBRIDGE_INTEL_COMMON
+
config SOUTHBRIDGE_INTEL_COMMON_GPIO
def_bool n
diff --git a/src/southbridge/intel/common/Makefile.inc b/src/southbridge/intel/common/Makefile.inc
index 3ad79248a0..ac339a2915 100644
--- a/src/southbridge/intel/common/Makefile.inc
+++ b/src/southbridge/intel/common/Makefile.inc
@@ -25,6 +25,8 @@ postcar-$(CONFIG_SOUTHBRIDGE_INTEL_COMMON_RESET) += reset.c
romstage-$(CONFIG_SOUTHBRIDGE_INTEL_COMMON_SMBUS) += smbus.c
ramstage-$(CONFIG_SOUTHBRIDGE_INTEL_COMMON_SMBUS) += smbus.c
+romstage-$(CONFIG_SOUTHBRIDGE_INTEL_COMMON_PMCLIB) += pmclib.c
+
ifeq ($(CONFIG_SOUTHBRIDGE_INTEL_COMMON),y)
romstage-y += pmbase.c
diff --git a/src/southbridge/intel/common/pmclib.c b/src/southbridge/intel/common/pmclib.c
new file mode 100644
index 0000000000..198562baee
--- /dev/null
+++ b/src/southbridge/intel/common/pmclib.c
@@ -0,0 +1,52 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2008-2009 coresystems GmbH
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; version 2 of
+ * the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <stdint.h>
+#include <arch/acpi.h>
+#include <console/console.h>
+
+#include "pmclib.h"
+#include "pmbase.h"
+#include "pmutil.h"
+
+int southbridge_detect_s3_resume(void)
+{
+ u32 pm1_cnt;
+ u16 pm1_sts;
+ int is_s3 = 0;
+
+ /* Check PM1_STS[15] to see if we are waking from Sx */
+ pm1_sts = read_pmbase16(PM1_STS);
+ if (pm1_sts & WAK_STS) {
+ /* Read PM1_CNT[12:10] to determine which Sx state */
+ pm1_cnt = read_pmbase32(PM1_CNT);
+ if (((pm1_cnt >> 10) & 7) == SLP_TYP_S3) {
+ /* Clear SLP_TYPE. */
+ write_pmbase32(PM1_CNT, pm1_cnt & ~(7 << 10));
+ is_s3 = 1;
+ }
+ }
+ if (is_s3) {
+ if (!acpi_s3_resume_allowed()) {
+ printk(BIOS_DEBUG, "SB: Resume from S3 detected, but disabled.\n");
+ return 0;
+ }
+
+ printk(BIOS_DEBUG, "SB: Resume from S3 detected.\n");
+ }
+
+ return is_s3;
+}
diff --git a/src/southbridge/intel/common/pmclib.h b/src/southbridge/intel/common/pmclib.h
new file mode 100644
index 0000000000..7de5f97074
--- /dev/null
+++ b/src/southbridge/intel/common/pmclib.h
@@ -0,0 +1,26 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2008-2009 coresystems GmbH
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; version 2 of
+ * the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef INTEL_COMMON_PMCLIB_H
+#define INTEL_COMMON_PMCLIB_H
+
+/*
+ * Returns 1 if platform was in ACPI S3 power state and CONFIG(ACPI_RESUME)
+ * is enabled else returns 0.
+ */
+int southbridge_detect_s3_resume(void);
+
+#endif