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| author | Jamie Chen <jamie.chen@intel.com> | 2020-04-16 01:20:29 +0800 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2020-05-13 12:04:03 +0000 |
| commit | 7adcfde079324b834c9a6370af38e56e34f1c45c (patch) | |
| tree | d056935c7da7838a3078f13a4df9acd1e7ccacf8 /src/include | |
| parent | 7d1a4b2584ce61f89f8b4de52880f0a6db96aa94 (diff) | |
| download | coreboot-7adcfde079324b834c9a6370af38e56e34f1c45c.tar.xz | |
lib/spd_bin: add get_spd_sn function
This patch adds the get_spd_sn function. It's for reading SODIMM serial
number. In spd_cache implementation it can use to get serial number
before reading whole SPD by smbus.
BUG=b:146457985
BRANCH=None
TEST=Wrote sample code to get the serial number and ran on puff.
It can get the serial number correctly.
Change-Id: I406bba7cc56debbd9851d430f069e4fb96ec937c
Signed-off-by: Jamie Chen <jamie.chen@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/40414
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src/include')
| -rw-r--r-- | src/include/spd_bin.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/src/include/spd_bin.h b/src/include/spd_bin.h index d1ee6f775c..11a0084c70 100644 --- a/src/include/spd_bin.h +++ b/src/include/spd_bin.h @@ -21,16 +21,19 @@ #define SPD_DRAM_LPDDR5 0x13 #define SPD_DENSITY_BANKS 4 #define SPD_ADDRESSING 5 +#define SPD_SN_LEN 4 #define DDR3_ORGANIZATION 7 #define DDR3_BUS_DEV_WIDTH 8 #define DDR4_ORGANIZATION 12 #define DDR4_BUS_DEV_WIDTH 13 #define DDR3_SPD_PART_OFF 128 #define DDR3_SPD_PART_LEN 18 +#define DDR3_SPD_SN_OFF 122 #define LPDDR3_SPD_PART_OFF 128 #define LPDDR3_SPD_PART_LEN 18 #define DDR4_SPD_PART_OFF 329 #define DDR4_SPD_PART_LEN 20 +#define DDR4_SPD_SN_OFF 325 struct spd_block { u8 addr_map[CONFIG_DIMM_MAX]; /* 7 bit I2C addresses */ @@ -45,6 +48,13 @@ int get_spd_cbfs_rdev(struct region_device *spd_rdev, u8 spd_index); void dump_spd_info(struct spd_block *blk); void get_spd_smbus(struct spd_block *blk); +/* + * get_spd_sn returns the SODIMM serial number. It only supports DDR3 and DDR4. + * return CB_SUCCESS, sn is the serial number and sn=0xffffffff if the dimm is not present. + * return CB_ERR, if dram_type is not supported or addr is a zero. + */ +enum cb_err get_spd_sn(u8 addr, u32 *sn); + /* expects SPD size to be 128 bytes, reads from "spd.bin" in CBFS and verifies the checksum. Only available if CONFIG_DIMM_SPD_SIZE == 128. */ int read_ddr3_spd_from_cbfs(u8 *buf, int idx); |