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-rw-r--r--src/soc/amd/common/block/aoac/Kconfig6
-rw-r--r--src/soc/amd/common/block/aoac/Makefile.inc8
-rw-r--r--src/soc/amd/common/block/aoac/aoac.c32
-rw-r--r--src/soc/amd/common/block/include/amdblocks/aoac.h4
4 files changed, 50 insertions, 0 deletions
diff --git a/src/soc/amd/common/block/aoac/Kconfig b/src/soc/amd/common/block/aoac/Kconfig
new file mode 100644
index 0000000000..361a46e035
--- /dev/null
+++ b/src/soc/amd/common/block/aoac/Kconfig
@@ -0,0 +1,6 @@
+config SOC_AMD_COMMON_BLOCK_AOAC
+ bool
+ default n
+ help
+ Select this option to add the common functions for the AOAC block to
+ the build.
diff --git a/src/soc/amd/common/block/aoac/Makefile.inc b/src/soc/amd/common/block/aoac/Makefile.inc
new file mode 100644
index 0000000000..4debc55928
--- /dev/null
+++ b/src/soc/amd/common/block/aoac/Makefile.inc
@@ -0,0 +1,8 @@
+ifeq ($(CONFIG_SOC_AMD_COMMON_BLOCK_AOAC),y)
+
+bootblock-y += aoac.c
+romstage-y += aoac.c
+verstage-y += aoac.c
+ramstage-y += aoac.c
+
+endif # CONFIG_SOC_AMD_COMMON_BLOCK_AOAC
diff --git a/src/soc/amd/common/block/aoac/aoac.c b/src/soc/amd/common/block/aoac/aoac.c
new file mode 100644
index 0000000000..c5f161bfcb
--- /dev/null
+++ b/src/soc/amd/common/block/aoac/aoac.c
@@ -0,0 +1,32 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <stdint.h>
+#include <amdblocks/acpimmio.h>
+#include <amdblocks/aoac.h>
+
+/* This initiates the power on sequence, but doesn't wait for the device to be powered on. */
+void power_on_aoac_device(unsigned int dev)
+{
+ uint8_t byte = aoac_read8(AOAC_DEV_D3_CTL(dev));
+ byte |= FCH_AOAC_PWR_ON_DEV;
+ byte &= ~FCH_AOAC_TARGET_DEVICE_STATE;
+ byte |= FCH_AOAC_D0_INITIALIZED;
+ aoac_write8(AOAC_DEV_D3_CTL(dev), byte);
+}
+
+void power_off_aoac_device(unsigned int dev)
+{
+ uint8_t byte = aoac_read8(AOAC_DEV_D3_CTL(dev));
+ byte &= ~FCH_AOAC_PWR_ON_DEV;
+ aoac_write8(AOAC_DEV_D3_CTL(dev), byte);
+}
+
+bool is_aoac_device_enabled(unsigned int dev)
+{
+ uint8_t byte = aoac_read8(AOAC_DEV_D3_STATE(dev));
+ byte &= (FCH_AOAC_PWR_RST_STATE | FCH_AOAC_RST_CLK_OK_STATE);
+ if (byte == (FCH_AOAC_PWR_RST_STATE | FCH_AOAC_RST_CLK_OK_STATE))
+ return true;
+ else
+ return false;
+}
diff --git a/src/soc/amd/common/block/include/amdblocks/aoac.h b/src/soc/amd/common/block/include/amdblocks/aoac.h
index f4f58e66e0..ff5d0db169 100644
--- a/src/soc/amd/common/block/include/amdblocks/aoac.h
+++ b/src/soc/amd/common/block/include/amdblocks/aoac.h
@@ -32,4 +32,8 @@
#define FCH_AOAC_STAT0 BIT(6)
#define FCH_AOAC_STAT1 BIT(7)
+bool is_aoac_device_enabled(unsigned int dev);
+void power_on_aoac_device(unsigned int dev);
+void power_off_aoac_device(unsigned int dev);
+
#endif /* AMD_BLOCK_AOAC_H */