diff options
| -rw-r--r-- | src/vendorcode/google/chromeos/Kconfig | 9 | ||||
| -rw-r--r-- | src/vendorcode/google/chromeos/Makefile.inc | 1 | ||||
| -rw-r--r-- | src/vendorcode/google/chromeos/chromeos.h | 11 | ||||
| -rw-r--r-- | src/vendorcode/google/chromeos/dsm_calib.c | 52 |
4 files changed, 73 insertions, 0 deletions
diff --git a/src/vendorcode/google/chromeos/Kconfig b/src/vendorcode/google/chromeos/Kconfig index 2ff7ec70b8..cdb4305fdd 100644 --- a/src/vendorcode/google/chromeos/Kconfig +++ b/src/vendorcode/google/chromeos/Kconfig @@ -95,5 +95,14 @@ config CHROMEOS_USE_EC_WATCHDOG_FLAG help Use the AP watchdog flag stored in EC. +config CHROMEOS_DSM_CALIB + bool + default n + help + On some boards, there are calibrated parameters for Dynamic Speaker Management(DSM) + stored in VPD. Enable this config to read and parse these VPD values and write them + to ACPI DSD table in device driver. These parameters will be applied by kernel driver + through device property at boot. + endif # CHROMEOS endmenu diff --git a/src/vendorcode/google/chromeos/Makefile.inc b/src/vendorcode/google/chromeos/Makefile.inc index 000d056509..05acdeec9a 100644 --- a/src/vendorcode/google/chromeos/Makefile.inc +++ b/src/vendorcode/google/chromeos/Makefile.inc @@ -21,6 +21,7 @@ ramstage-y += vpd_mac.c vpd_serialno.c vpd_calibration.c ramstage-$(CONFIG_CHROMEOS_DISABLE_PLATFORM_HIERARCHY_ON_RESUME) += tpm2.c ramstage-$(CONFIG_HAVE_REGULATORY_DOMAIN) += wrdd.c ramstage-$(CONFIG_USE_SAR) += sar.c +ramstage-$(CONFIG_CHROMEOS_DSM_CALIB) += dsm_calib.c ramstage-$(CONFIG_TPM_CR50) += cr50_enable_update.c ifeq ($(CONFIG_ARCH_MIPS),) bootblock-y += watchdog.c diff --git a/src/vendorcode/google/chromeos/chromeos.h b/src/vendorcode/google/chromeos/chromeos.h index e5420ac099..a40c4c9a88 100644 --- a/src/vendorcode/google/chromeos/chromeos.h +++ b/src/vendorcode/google/chromeos/chromeos.h @@ -23,6 +23,7 @@ #include <rules.h> #include <security/vboot/misc.h> #include <security/vboot/vboot_common.h> +#include <types.h> #if CONFIG(CHROMEOS) /* functions implemented in watchdog.c */ @@ -58,6 +59,16 @@ static inline void chromeos_reserve_ram_oops(struct device *dev, int idx) {} void cbmem_add_vpd_calibration_data(void); +/** + * get_dsm_calibration_from_key - Gets value related to DSM calibration from VPD + * @key: The key in RO_VPD. The valid prefix is "dsm_calib_". The valid keys are + * documented in https://chromeos.google.com/partner/dlm/docs/factory/vpd.html. + * @value: Output value. The value read from VPD parsed into uint64_t integer. + * + * Returns CB_SUCCESS on success or CB_ERR on failure. + */ +enum cb_err get_dsm_calibration_from_key(const char *key, uint64_t *value); + /* * Create the OIPG package containing the Chrome OS gpios described by * the chromeos_gpio array. diff --git a/src/vendorcode/google/chromeos/dsm_calib.c b/src/vendorcode/google/chromeos/dsm_calib.c new file mode 100644 index 0000000000..d3b14cb03c --- /dev/null +++ b/src/vendorcode/google/chromeos/dsm_calib.c @@ -0,0 +1,52 @@ +/* + * This file is part of the coreboot project. + * + * Copyright 2019 Google Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <console/console.h> +#include <drivers/vpd/vpd.h> +#include <stdint.h> +#include <string.h> +#include <types.h> +#include <vendorcode/google/chromeos/chromeos.h> + +#define DSM_BUF_LEN 128 +#define DSM_PREFIX "dsm_calib_" + +enum cb_err get_dsm_calibration_from_key(const char *key, uint64_t *value) +{ + static char buf[DSM_BUF_LEN]; + char *ret; + long value_from_vpd; + + if (strncmp(key, DSM_PREFIX, strlen(DSM_PREFIX))) { + printk(BIOS_ERR, "got invalid dsm_calib key: %s\n", key); + return CB_ERR; + } + + ret = vpd_gets(key, buf, DSM_BUF_LEN, VPD_RO); + if (!ret) { + printk(BIOS_ERR, "failed to find key in VPD: %s\n", key); + return CB_ERR; + } + + value_from_vpd = atol(buf); + if (value_from_vpd <= 0) { + printk(BIOS_ERR, "got invalid dsm_calib from VPD: %ld\n", value_from_vpd); + return CB_ERR; + } + + *value = value_from_vpd; + + return CB_SUCCESS; +} |