diff options
Diffstat (limited to 'common/cbi_gpio.c')
-rw-r--r-- | common/cbi_gpio.c | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/common/cbi_gpio.c b/common/cbi_gpio.c new file mode 100644 index 0000000000..7b9fb25ebb --- /dev/null +++ b/common/cbi_gpio.c @@ -0,0 +1,72 @@ +/* Copyright 2021 The Chromium OS Authors. All rights reserved. + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +/* Support Cros Board Info GPIO */ + +#include "console.h" +#include "cros_board_info.h" +#include "gpio.h" +#include "system.h" +#include "util.h" + +#define CPRINTS(format, args...) cprints(CC_SYSTEM, "CBI " format, ## args) + +static int cbi_gpio_read(uint8_t offset, uint8_t *data, int len) +{ + int board_id; + int sku_id; + int rv; + int err = 0; + + if (cbi_get_cache_status() == CBI_CACHE_STATUS_SYNCED) + return EC_SUCCESS; + + cbi_create(); + + board_id = system_get_board_version(); + if (board_id < 0) { + CPRINTS("Failed (%d) to get a valid board id", -board_id); + err++; + } else { + rv = cbi_set_board_info(CBI_TAG_BOARD_VERSION, + (uint8_t *)&board_id, sizeof(int)); + if (rv) { + CPRINTS("Failed (%d) to set BOARD_VERSION tag", rv); + err++; + } + } + + sku_id = system_get_sku_id(); + rv = cbi_set_board_info(CBI_TAG_SKU_ID, + (uint8_t *)&sku_id, sizeof(int)); + if (rv) { + CPRINTS("Failed (%d) to set SKU_ID tag", rv); + err++; + } + + if (err > 0) + return EC_ERROR_UNKNOWN; + + return EC_SUCCESS; +} + +static int cbi_gpio_is_write_protected(void) +{ + /* + * When CBI comes from strapping pins, any attempts for updating CBI + * storage should be rejected. + */ + return 1; +} + +const struct cbi_storage_driver gpio_drv = { + .load = cbi_gpio_read, + .is_protected = cbi_gpio_is_write_protected, +}; + +const struct cbi_storage_config_t cbi_config = { + .storage_type = CBI_STORAGE_TYPE_GPIO, + .drv = &gpio_drv, +}; |