Allow dynmic i2c device addresses and set up PMIC targets to do this

Depending on which vendor made a given OCMB the i2c device address
of the PMIC targets on the OCMB will be different. To account for this
we have added a new DYNAMIC_DEVICE_ADDRESS attribute. This attribute
is filled out on the PMIC target by looking at the SPD on parent
OCMB chip. This means that we must do presence detection on the OCMB
prior to the the PMIC targets. While doing i2c operations if a given
target has the DYNAMIC_DEVICE_ADDRESS we will use that over the devAddr
in the any complex i2c attribute for that target.

Change-Id: I22a185a65c064a1514751dd5828547c57af98df1
RTC: 209714
Reviewed-on: http://rchgit01.rchland.ibm.com/gerrit1/85394
Tested-by: Jenkins Server <pfd-jenkins+hostboot@us.ibm.com>
Tested-by: Jenkins OP Build CI <op-jenkins+hostboot@us.ibm.com>
Tested-by: Jenkins OP HW <op-hw-jenkins+hostboot@us.ibm.com>
Tested-by: FSP CI Jenkins <fsp-CI-jenkins+hostboot@us.ibm.com>
Reviewed-by: Daniel M Crowell <dcrowell@us.ibm.com>
Reviewed-by: Roland Veloz <rveloz@us.ibm.com>
Reviewed-by: William G Hoffa <wghoffa@us.ibm.com>

2 files changed, 15 insertions, 3 deletions

diff --git a/src/include/usr/fapiwrap/fapiWrapif.H b/src/include/usr/fapiwrap/fapiWrapif.H
index f37aea26b..e3a50f3b7 100644
--- a/src/include/usr/fapiwrap/fapiWrapif.H
+++ b/src/include/usr/fapiwrap/fapiWrapif.H
@@ -55,6 +55,18 @@ namespace FAPIWRAP
     errlHndl_t explorer_getidec( TARGETING::Target * i_ocmbChip,
                                   uint16_t& o_chipId,
                                   uint8_t&  o_ec);
+
+    /**
+     * @brief This function wraps around the FAPI2 HWP "get_pmic_i2c_addr" which
+     *        takes in a DDIMM's DDR4 SPD data and a PMIC's position relative to
+     *        its parent OCMB's chip and returns the device address of that pmic
+     * @param[in] i_spd      - Binary blob containing addresses a given OCMB's PMICs
+     * @param[in] i_pmic_id  - PMIC's position relative to parent OCMB
+     * @return uint8_t 0 if invalid pmic_id is passed, PMIC's devAddress otherwise
+     */
+    uint8_t get_pmic_dev_addr( const char* i_spd,
+                               const uint8_t i_pmic_id);
+
 }
 
 #endif
\ No newline at end of file
diff --git a/src/include/usr/i2c/eeprom_const.H b/src/include/usr/i2c/eeprom_const.H
index 055aa2172..275388450 100644
--- a/src/include/usr/i2c/eeprom_const.H
+++ b/src/include/usr/i2c/eeprom_const.H
@@ -170,9 +170,9 @@ struct eecacheSectionHeader
  */
 struct eeprom_addr_t
 {
-    uint64_t port;
-    uint64_t engine;
-    uint64_t devAddr;
+    uint8_t port;
+    uint8_t engine;
+    uint8_t devAddr;
     int64_t  eepromRole;
     uint64_t offset;
     eeprom_addr_size_t addrSize;