diff options
Diffstat (limited to 'src/soc/intel/common/block/include')
| -rw-r--r-- | src/soc/intel/common/block/include/intelblocks/gpio.h | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/src/soc/intel/common/block/include/intelblocks/gpio.h b/src/soc/intel/common/block/include/intelblocks/gpio.h index 86a36d5e6b..8496db32c5 100644 --- a/src/soc/intel/common/block/include/intelblocks/gpio.h +++ b/src/soc/intel/common/block/include/intelblocks/gpio.h @@ -121,6 +121,7 @@ struct pad_community { uint16_t gpi_nmi_sts_reg_0; /* offset to GPI NMI STS Reg 0 */ uint16_t gpi_nmi_en_reg_0; /* offset to GPI NMI EN Reg 0 */ uint16_t pad_cfg_base; /* offset to first PAD_GFG_DW0 Reg */ + uint16_t pad_cfg_lock_offset; /* offset to first PADCFGLOCK Reg */ uint8_t gpi_status_offset; /* specifies offset in struct gpi_status */ uint8_t port; /* PCR Port ID */ @@ -197,6 +198,38 @@ void gpio_configure_pads_with_override(const struct pad_config *base_cfg, */ void *gpio_dwx_address(const gpio_t pad); +enum gpio_lock_action { + GPIO_LOCK_CONFIG = 0x1, + GPIO_LOCK_TX = 0x2, + GPIO_LOCK_FULL = GPIO_LOCK_CONFIG | GPIO_LOCK_TX, +}; + +/* + * Lock a GPIO's configuration. + * + * The caller may specify if they wish to only lock the pad configuration, only + * the TX state, or both. When the configuration is locked, the following + * registers become Read-Only and software writes to these registers have no + * effect. + * + * Pad Configuration registers, + * GPI_NMI_EN, + * GPI_SMI_EN, + * GPI_GPE_EN + * + * Note that this is only effective if the pad is owned by the host and this + * function may only be called in SMM. + * + * @param pad: GPIO pad number + * @param action: Which register to lock. + * @return 0 if successful, + * 1 - unsuccessful + * 2 - powered down + * 3 - multi-cast mixed + * -1 - sideband message failed or other error + */ +int gpio_lock_pad(const gpio_t pad, enum gpio_lock_action action); + /* * Returns the pmc_gpe to gpio_gpe mapping table * |