diff options
Diffstat (limited to 'src/soc/amd/common/block/aoac/aoac.c')
| -rw-r--r-- | src/soc/amd/common/block/aoac/aoac.c | 32 |
1 files changed, 32 insertions, 0 deletions
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; +} |