diff options
Diffstat (limited to 'src/mainboard/google/zork/variants/baseboard/helpers.c')
-rw-r--r-- | src/mainboard/google/zork/variants/baseboard/helpers.c | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/src/mainboard/google/zork/variants/baseboard/helpers.c b/src/mainboard/google/zork/variants/baseboard/helpers.c new file mode 100644 index 0000000000..06cc9ad4ff --- /dev/null +++ b/src/mainboard/google/zork/variants/baseboard/helpers.c @@ -0,0 +1,115 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ + +#include <console/console.h> +#include <inttypes.h> +#include <baseboard/variants.h> +#include <ec/google/chromeec/ec.h> + +/* Global definitions for FW_CONFIG values */ +enum { + /* Daughterboard index for attributes. */ + FW_CONFIG_MASK_DB_INDEX = 0xf, + FW_CONFIG_DB_INDEX_SHIFT = 0, + /* Mainboard USB index for attributes. */ + FW_CONFIG_MASK_MB_USB_INDEX = 0xf, + FW_CONFIG_MB_USB_INDEX_SHIFT = 4, + /* Lid accelerometer properties. */ + FW_CONFIG_MASK_LID_ACCEL = 0x7, + FW_CONFIG_LID_ACCEL_SHIFT = 8, + /* Base gyro sensor properties. */ + FW_CONFIG_MASK_BASE_GYRO = 0x7, + FW_CONFIG_BASE_GYRO_SHIFT = 11, + /* Keyboard backlight presence */ + FW_CONFIG_MASK_KEYB_BL = 0x1, + FW_CONFIG_KEYB_BL_SHIFT = 14, + /* Tablet mode supported through lid angle */ + FW_CONFIG_MASK_LID_ANGLE_TABLET_MODE = 0x1, + FW_CONFIG_LID_ANGLE_TABLET_MODE_SHIFT = 15, + /* Stylus presence */ + FW_CONFIG_MASK_STYLUS = 0x1, + FW_CONFIG_STYLUS_SHIFT = 16, + /* Fingerprint sensor presence */ + FW_CONFIG_MASK_FP = 0x1, + FW_CONFIG_SHIFT_FP = 17, + /* NVME presence */ + FW_CONFIG_MASK_NVME = 0x1, + FW_CONFIG_SHIFT_NVME = 18, + /* EMMC presence */ + FW_CONFIG_MASK_EMMC = 0x1, + FW_CONFIG_SHIFT_EMMC = 19, + /* SD controller type */ + FW_CONFIG_MASK_SD_CTRLR = 0x7, + FW_CONFIG_SHIFT_SD_CTRLR = 20, + /* SPI speed value */ + FW_CONFIG_MASK_SPI_SPEED = 0xf, + FW_CONFIG_SHIFT_SPI_SPEED = 23, + /* Fan information */ + FW_CONFIG_MASK_FAN = 0x3, + FW_CONFIG_SHIFT_FAN = 27, +}; + +int variant_fw_config_valid(void) +{ + static uint32_t board_version; + const uint32_t bv_valid = CONFIG_VARIANT_BOARD_VER_FW_CONFIG_VALID; + + if (!CONFIG(VARIANT_HAS_FW_CONFIG)) + return 0; + + /* Fast path for non-zero board version. */ + if (board_version >= bv_valid) + return 1; + + if (google_chromeec_cbi_get_board_version(&board_version)) { + printk(BIOS_ERR, "Unable to obtain board version for FW_CONFIG\n"); + return 0; + } + + if (board_version >= bv_valid) + return 1; + + return 0; +} + +static int get_fw_config(uint32_t *val) +{ + static uint32_t known_value; + + if (!variant_fw_config_valid()) + return -1; + + if (known_value) { + *val = known_value; + return 0; + } + + if (google_chromeec_cbi_get_fw_config(&known_value)) { + printk(BIOS_ERR, "FW_CONFIG not set in CBI\n"); + return -1; + } + + *val = known_value; + + return 0; +} + +static unsigned int extract_field(uint32_t mask, int shift) +{ + uint32_t fw_config; + + /* On errors nothing is assumed to be set. */ + if (get_fw_config(&fw_config)) + return 0; + + return (fw_config >> shift) & mask; +} + +int variant_has_emmc(void) +{ + return !!extract_field(FW_CONFIG_MASK_EMMC, FW_CONFIG_SHIFT_EMMC); +} + +int variant_has_nvme(void) +{ + return !!extract_field(FW_CONFIG_MASK_NVME, FW_CONFIG_SHIFT_NVME); +} |