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authorHung-Te Lin <hungte@chromium.org>2013-04-25 17:38:55 +0800
committerRonald G. Minnich <rminnich@gmail.com>2013-04-25 19:31:09 +0200
commitbd7f5f64924353add8a2508eac65b8fbb77d0ed4 (patch)
tree36ca189aea5e29520caa25326874450e2192261e /src/mainboard/google/snow
parent55c753d3a948fc06d8ccbc3cef678ef2e71f616f (diff)
downloadcoreboot-bd7f5f64924353add8a2508eac65b8fbb77d0ed4.tar.xz
google/snow: Add "wakeup" module for suspend/resume.
The "wakeup" procedure will be shared by bootblock and romstage for different types of resume processes. Note, this commit does not include changes in romstage/bootblock to enable suspend/resume feature. Simply adding functions to handle suspend/resume. Verified by successfully building and booting Google/Snow firmware image. Change-Id: I17a256afb99f2f8b5e0eac3393cdf6959b239341 Signed-off-by: Hung-Te Lin <hungte@chromium.org> Reviewed-on: http://review.coreboot.org/3129 Tested-by: build bot (Jenkins) Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Diffstat (limited to 'src/mainboard/google/snow')
-rw-r--r--src/mainboard/google/snow/Makefile.inc3
-rw-r--r--src/mainboard/google/snow/mainboard.h11
-rw-r--r--src/mainboard/google/snow/romstage.c13
-rw-r--r--src/mainboard/google/snow/wakeup.c62
4 files changed, 76 insertions, 13 deletions
diff --git a/src/mainboard/google/snow/Makefile.inc b/src/mainboard/google/snow/Makefile.inc
index 46e366fa7d..84a8c054d6 100644
--- a/src/mainboard/google/snow/Makefile.inc
+++ b/src/mainboard/google/snow/Makefile.inc
@@ -17,9 +17,12 @@
## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
##
+bootblock-y += wakeup.c
+
romstage-y += mainboard.c
romstage-y += memory.c
romstage-y += romstage.c
+romstage-y += wakeup.c
# ramstage-y += ec.c
ramstage-y += ramstage.c
diff --git a/src/mainboard/google/snow/mainboard.h b/src/mainboard/google/snow/mainboard.h
index 6fe371fc99..63a2c18c63 100644
--- a/src/mainboard/google/snow/mainboard.h
+++ b/src/mainboard/google/snow/mainboard.h
@@ -35,4 +35,15 @@ enum snow_board_config {
int board_get_config(void);
+enum {
+ BOARD_IS_NOT_WAKEUP, // A normal boot (not suspend/resume).
+ BOARD_WAKEUP_DIRECT, // A wake up event that can be resumed any time.
+ BOARD_WAKEUP_NEED_CLOCK_RESET, // A wake up event that must be resumed
+ // only after clock and memory
+ // controllers are re-initialized.
+};
+
+int board_get_wakeup_state(void);
+void board_wakeup(void);
+
#endif /* MAINBOARD_H */
diff --git a/src/mainboard/google/snow/romstage.c b/src/mainboard/google/snow/romstage.c
index edbe00919f..6e312fa4ca 100644
--- a/src/mainboard/google/snow/romstage.c
+++ b/src/mainboard/google/snow/romstage.c
@@ -46,19 +46,6 @@
#define PMIC_BUS 0
#define MMC0_GPIO_PIN (58)
-#if 0
-static int board_wakeup_permitted(void)
-{
- const int gpio = GPIO_Y10;
- int is_bad_wake;
-
- /* We're a bad wakeup if the gpio was defined and was high */
- is_bad_wake = ((gpio != -1) && gpio_get_value(gpio));
-
- return !is_bad_wake;
-}
-#endif
-
static int setup_pmic(void)
{
int error = 0;
diff --git a/src/mainboard/google/snow/wakeup.c b/src/mainboard/google/snow/wakeup.c
new file mode 100644
index 0000000000..33ea9d8fd1
--- /dev/null
+++ b/src/mainboard/google/snow/wakeup.c
@@ -0,0 +1,62 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2013 Google, Inc. All rights reserved.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <arch/gpio.h>
+#include <arch/hlt.h>
+#include <console/console.h>
+#include <cpu/samsung/exynos5250/gpio.h>
+#include <cpu/samsung/exynos5250/power.h>
+#include <cpu/samsung/exynos5-common/exynos5-common.h>
+
+#include "mainboard.h"
+
+static int wakeup_need_reset(void)
+{
+ /* The "wake up" event is not reliable (known as "bad wakeup") and needs
+ * reset if GPIO value is high. */
+ return gpio_get_value(GPIO_Y10);
+}
+
+void board_wakeup(void)
+{
+ if (wakeup_need_reset())
+ power_reset();
+
+ power_init(); /* Ensure ps_hold_setup() for early wakeup. */
+ power_exit_wakeup();
+ /* Should never return. */
+ die("Failed to wake up.\n");
+}
+
+int board_get_wakeup_state()
+{
+ uint32_t status = power_read_reset_status();
+
+ /* DIDLE/LPA can be resumed without clock reset (ex, bootblock),
+ * and SLEEP requires resetting clock (should be done in ROM stage).
+ */
+
+ if (status == S5P_CHECK_DIDLE || status == S5P_CHECK_LPA)
+ return BOARD_WAKEUP_DIRECT;
+
+ if (status == S5P_CHECK_SLEEP)
+ return BOARD_WAKEUP_NEED_CLOCK_RESET;
+
+ return BOARD_IS_NOT_WAKEUP;
+}