diff options
Diffstat (limited to 'src/soc/intel/common/block/smbus/smbuslib.c')
| -rw-r--r-- | src/soc/intel/common/block/smbus/smbuslib.c | 23 |
1 files changed, 15 insertions, 8 deletions
diff --git a/src/soc/intel/common/block/smbus/smbuslib.c b/src/soc/intel/common/block/smbus/smbuslib.c index 4db2c6e7a4..5f60ddcab3 100644 --- a/src/soc/intel/common/block/smbus/smbuslib.c +++ b/src/soc/intel/common/block/smbus/smbuslib.c @@ -38,14 +38,14 @@ static void smbus_read_spd(u8 *spd, u8 addr) } } -static void get_spd(u8 *spd, u8 addr) +/* return -1 if SMBus errors otherwise return 0 */ +static int get_spd(u8 *spd, u8 addr) { - if (do_smbus_read_byte(SMBUS_IO_BASE, addr, 0) == 0xff) { + /* If address is not 0, it will return CB_ERR(-1) if no dimm */ + if (do_smbus_read_byte(SMBUS_IO_BASE, addr, 0) < 0) { printk(BIOS_INFO, "No memory dimm at address %02X\n", addr << 1); - /* Make sure spd is zeroed if dimm doesn't exist. */ - memset(spd, 0, CONFIG_DIMM_SPD_SIZE); - return; + return -1; } smbus_read_spd(spd, addr); @@ -58,6 +58,7 @@ static void get_spd(u8 *spd, u8 addr) /* Restore to page 0 */ do_smbus_write_byte(SMBUS_IO_BASE, SPD_PAGE_0, 0, 0); } + return 0; } static u8 spd_data[CONFIG_DIMM_MAX * CONFIG_DIMM_SPD_SIZE]; @@ -66,9 +67,15 @@ void get_spd_smbus(struct spd_block *blk) { u8 i; for (i = 0 ; i < CONFIG_DIMM_MAX; i++) { - get_spd(&spd_data[i * CONFIG_DIMM_SPD_SIZE], - blk->addr_map[i]); - blk->spd_array[i] = &spd_data[i * CONFIG_DIMM_SPD_SIZE]; + if (blk->addr_map[i] == 0) { + blk->spd_array[i] = NULL; + continue; + } + + if (get_spd(&spd_data[i * CONFIG_DIMM_SPD_SIZE], blk->addr_map[i]) == 0) + blk->spd_array[i] = &spd_data[i * CONFIG_DIMM_SPD_SIZE]; + else + blk->spd_array[i] = NULL; } update_spd_len(blk); |