src/soc/intel/common/block/imc/spd_access.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <commonlib/bsd/cb_err.h>
   4 #include <intelblocks/imc.h>
   5 #include <soc/pci_devs.h>
   6 #include <spd_bin.h>
   7
   8 #include "imclib.h"
   9
  10 int spd_read_byte(u8 slave_addr, u8 bus_addr)
  11 {
  12         uint8_t value;
  13
  14         if (imc_smbus_spd_xfer(IMC_SPD_DEV, slave_addr, bus_addr, IMC_DEVICE_EEPROM, IMC_DATA_BYTE,
  15                                IMC_CONTROLLER_ID0, IMC_READ, &value) == CB_SUCCESS) {
  16                 return value;
  17         }
  18
  19         return -1;
  20 }
  21
  22 int spd_read_word(u8 slave_addr, u8 bus_addr)
  23 {
  24         uint16_t value = 0;
  25
  26         if (imc_smbus_spd_xfer(IMC_SPD_DEV, slave_addr, bus_addr, IMC_DEVICE_EEPROM, IMC_DATA_WORD,
  27                                IMC_CONTROLLER_ID0, IMC_READ, &value) == CB_SUCCESS) {
  28                 return value;
  29         }
  30
  31         return -1;
  32 }
  33
  34 void spd_write_byte(u8 slave_addr, u8 bus_addr, u8 value)
  35 {
  36         imc_smbus_spd_xfer(IMC_SPD_DEV, slave_addr, bus_addr, IMC_DEVICE_WP_EEPROM,
  37                            IMC_DATA_BYTE, IMC_CONTROLLER_ID0, IMC_WRITE, &value);
  38 }